tests versuch 2

venv/lib/python3.11/site-packages/engineio/__init__.py

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+import sys
+
+from .client import Client
+from .middleware import WSGIApp, Middleware
+from .server import Server
+if sys.version_info >= (3, 5):  # pragma: no cover
+    from .asyncio_server import AsyncServer
+    from .asyncio_client import AsyncClient
+    from .async_drivers.asgi import ASGIApp
+    try:
+        from .async_drivers.tornado import get_tornado_handler
+    except ImportError:
+        get_tornado_handler = None
+else:  # pragma: no cover
+    AsyncServer = None
+    AsyncClient = None
+    get_tornado_handler = None
+    ASGIApp = None
+
+__all__ = ['Server', 'WSGIApp', 'Middleware', 'Client']
+if AsyncServer is not None:  # pragma: no cover
+    __all__ += ['AsyncServer', 'ASGIApp', 'get_tornado_handler',
+                'AsyncClient']

venv/lib/python3.11/site-packages/engineio/async_drivers/aiohttp.py

@@ -0,0 +1,127 @@
+import asyncio
+import sys
+from urllib.parse import urlsplit
+
+from aiohttp.web import Response, WebSocketResponse
+
+
+def create_route(app, engineio_server, engineio_endpoint):
+    """This function sets up the engine.io endpoint as a route for the
+    application.
+
+    Note that both GET and POST requests must be hooked up on the engine.io
+    endpoint.
+    """
+    app.router.add_get(engineio_endpoint, engineio_server.handle_request)
+    app.router.add_post(engineio_endpoint, engineio_server.handle_request)
+    app.router.add_route('OPTIONS', engineio_endpoint,
+                         engineio_server.handle_request)
+
+
+def translate_request(request):
+    """This function takes the arguments passed to the request handler and
+    uses them to generate a WSGI compatible environ dictionary.
+    """
+    message = request._message
+    payload = request._payload
+
+    uri_parts = urlsplit(message.path)
+    environ = {
+        'wsgi.input': payload,
+        'wsgi.errors': sys.stderr,
+        'wsgi.version': (1, 0),
+        'wsgi.async': True,
+        'wsgi.multithread': False,
+        'wsgi.multiprocess': False,
+        'wsgi.run_once': False,
+        'SERVER_SOFTWARE': 'aiohttp',
+        'REQUEST_METHOD': message.method,
+        'QUERY_STRING': uri_parts.query or '',
+        'RAW_URI': message.path,
+        'SERVER_PROTOCOL': 'HTTP/%s.%s' % message.version,
+        'REMOTE_ADDR': '127.0.0.1',
+        'REMOTE_PORT': '0',
+        'SERVER_NAME': 'aiohttp',
+        'SERVER_PORT': '0',
+        'aiohttp.request': request
+    }
+
+    for hdr_name, hdr_value in message.headers.items():
+        hdr_name = hdr_name.upper()
+        if hdr_name == 'CONTENT-TYPE':
+            environ['CONTENT_TYPE'] = hdr_value
+            continue
+        elif hdr_name == 'CONTENT-LENGTH':
+            environ['CONTENT_LENGTH'] = hdr_value
+            continue
+
+        key = 'HTTP_%s' % hdr_name.replace('-', '_')
+        if key in environ:
+            hdr_value = '%s,%s' % (environ[key], hdr_value)
+
+        environ[key] = hdr_value
+
+    environ['wsgi.url_scheme'] = environ.get('HTTP_X_FORWARDED_PROTO', 'http')
+
+    path_info = uri_parts.path
+
+    environ['PATH_INFO'] = path_info
+    environ['SCRIPT_NAME'] = ''
+
+    return environ
+
+
+def make_response(status, headers, payload, environ):
+    """This function generates an appropriate response object for this async
+    mode.
+    """
+    return Response(body=payload, status=int(status.split()[0]),
+                    headers=headers)
+
+
+class WebSocket(object):  # pragma: no cover
+    """
+    This wrapper class provides a aiohttp WebSocket interface that is
+    somewhat compatible with eventlet's implementation.
+    """
+    def __init__(self, handler, server):
+        self.handler = handler
+        self._sock = None
+
+    async def __call__(self, environ):
+        request = environ['aiohttp.request']
+        self._sock = WebSocketResponse(max_msg_size=0)
+        await self._sock.prepare(request)
+
+        self.environ = environ
+        await self.handler(self)
+        return self._sock
+
+    async def close(self):
+        await self._sock.close()
+
+    async def send(self, message):
+        if isinstance(message, bytes):
+            f = self._sock.send_bytes
+        else:
+            f = self._sock.send_str
+        if asyncio.iscoroutinefunction(f):
+            await f(message)
+        else:
+            f(message)
+
+    async def wait(self):
+        msg = await self._sock.receive()
+        if not isinstance(msg.data, bytes) and \
+                not isinstance(msg.data, str):
+            raise IOError()
+        return msg.data
+
+
+_async = {
+    'asyncio': True,
+    'create_route': create_route,
+    'translate_request': translate_request,
+    'make_response': make_response,
+    'websocket': WebSocket,
+}

venv/lib/python3.11/site-packages/engineio/async_drivers/asgi.py

@@ -0,0 +1,263 @@
+import os
+import sys
+import asyncio
+
+from engineio.static_files import get_static_file
+
+
+class ASGIApp:
+    """ASGI application middleware for Engine.IO.
+
+    This middleware dispatches traffic to an Engine.IO application. It can
+    also serve a list of static files to the client, or forward unrelated
+    HTTP traffic to another ASGI application.
+
+    :param engineio_server: The Engine.IO server. Must be an instance of the
+                            ``engineio.AsyncServer`` class.
+    :param static_files: A dictionary with static file mapping rules. See the
+                         documentation for details on this argument.
+    :param other_asgi_app: A separate ASGI app that receives all other traffic.
+    :param engineio_path: The endpoint where the Engine.IO application should
+                          be installed. The default value is appropriate for
+                          most cases.
+    :param on_startup: function to be called on application startup; can be
+                       coroutine
+    :param on_shutdown: function to be called on application shutdown; can be
+                        coroutine
+
+    Example usage::
+
+        import engineio
+        import uvicorn
+
+        eio = engineio.AsyncServer()
+        app = engineio.ASGIApp(eio, static_files={
+            '/': {'content_type': 'text/html', 'filename': 'index.html'},
+            '/index.html': {'content_type': 'text/html',
+                            'filename': 'index.html'},
+        })
+        uvicorn.run(app, '127.0.0.1', 5000)
+    """
+    def __init__(self, engineio_server, other_asgi_app=None,
+                 static_files=None, engineio_path='engine.io',
+                 on_startup=None, on_shutdown=None):
+        self.engineio_server = engineio_server
+        self.other_asgi_app = other_asgi_app
+        self.engineio_path = engineio_path
+        if not self.engineio_path.startswith('/'):
+            self.engineio_path = '/' + self.engineio_path
+        if not self.engineio_path.endswith('/'):
+            self.engineio_path += '/'
+        self.static_files = static_files or {}
+        self.on_startup = on_startup
+        self.on_shutdown = on_shutdown
+
+    async def __call__(self, scope, receive, send):
+        if scope['type'] in ['http', 'websocket'] and \
+                scope['path'].startswith(self.engineio_path):
+            await self.engineio_server.handle_request(scope, receive, send)
+        else:
+            static_file = get_static_file(scope['path'], self.static_files) \
+                if scope['type'] == 'http' and self.static_files else None
+            if scope['type'] == 'lifespan':
+                await self.lifespan(scope, receive, send)
+            elif static_file and os.path.exists(static_file['filename']):
+                await self.serve_static_file(static_file, receive, send)
+            elif self.other_asgi_app is not None:
+                await self.other_asgi_app(scope, receive, send)
+            else:
+                await self.not_found(receive, send)
+
+    async def serve_static_file(self, static_file, receive,
+                                send):  # pragma: no cover
+        event = await receive()
+        if event['type'] == 'http.request':
+            with open(static_file['filename'], 'rb') as f:
+                payload = f.read()
+            await send({'type': 'http.response.start',
+                        'status': 200,
+                        'headers': [(b'Content-Type', static_file[
+                            'content_type'].encode('utf-8'))]})
+            await send({'type': 'http.response.body',
+                        'body': payload})
+
+    async def lifespan(self, scope, receive, send):
+        if self.other_asgi_app is not None and self.on_startup is None and \
+                self.on_shutdown is None:
+            # let the other ASGI app handle lifespan events
+            await self.other_asgi_app(scope, receive, send)
+            return
+
+        while True:
+            event = await receive()
+            if event['type'] == 'lifespan.startup':
+                if self.on_startup:
+                    try:
+                        await self.on_startup() \
+                            if asyncio.iscoroutinefunction(self.on_startup) \
+                            else self.on_startup()
+                    except:
+                        await send({'type': 'lifespan.startup.failed'})
+                        return
+                await send({'type': 'lifespan.startup.complete'})
+            elif event['type'] == 'lifespan.shutdown':
+                if self.on_shutdown:
+                    try:
+                        await self.on_shutdown() \
+                            if asyncio.iscoroutinefunction(self.on_shutdown) \
+                            else self.on_shutdown()
+                    except:
+                        await send({'type': 'lifespan.shutdown.failed'})
+                        return
+                await send({'type': 'lifespan.shutdown.complete'})
+                return
+
+    async def not_found(self, receive, send):
+        """Return a 404 Not Found error to the client."""
+        await send({'type': 'http.response.start',
+                    'status': 404,
+                    'headers': [(b'Content-Type', b'text/plain')]})
+        await send({'type': 'http.response.body',
+                    'body': b'Not Found'})
+
+
+async def translate_request(scope, receive, send):
+    class AwaitablePayload(object):  # pragma: no cover
+        def __init__(self, payload):
+            self.payload = payload or b''
+
+        async def read(self, length=None):
+            if length is None:
+                r = self.payload
+                self.payload = b''
+            else:
+                r = self.payload[:length]
+                self.payload = self.payload[length:]
+            return r
+
+    event = await receive()
+    payload = b''
+    if event['type'] == 'http.request':
+        payload += event.get('body') or b''
+        while event.get('more_body'):
+            event = await receive()
+            if event['type'] == 'http.request':
+                payload += event.get('body') or b''
+    elif event['type'] == 'websocket.connect':
+        pass
+    else:
+        return {}
+
+    raw_uri = scope['path'].encode('utf-8')
+    if 'query_string' in scope and scope['query_string']:
+        raw_uri += b'?' + scope['query_string']
+    environ = {
+        'wsgi.input': AwaitablePayload(payload),
+        'wsgi.errors': sys.stderr,
+        'wsgi.version': (1, 0),
+        'wsgi.async': True,
+        'wsgi.multithread': False,
+        'wsgi.multiprocess': False,
+        'wsgi.run_once': False,
+        'SERVER_SOFTWARE': 'asgi',
+        'REQUEST_METHOD': scope.get('method', 'GET'),
+        'PATH_INFO': scope['path'],
+        'QUERY_STRING': scope.get('query_string', b'').decode('utf-8'),
+        'RAW_URI': raw_uri.decode('utf-8'),
+        'SCRIPT_NAME': '',
+        'SERVER_PROTOCOL': 'HTTP/1.1',
+        'REMOTE_ADDR': '127.0.0.1',
+        'REMOTE_PORT': '0',
+        'SERVER_NAME': 'asgi',
+        'SERVER_PORT': '0',
+        'asgi.receive': receive,
+        'asgi.send': send,
+        'asgi.scope': scope,
+    }
+
+    for hdr_name, hdr_value in scope['headers']:
+        hdr_name = hdr_name.upper().decode('utf-8')
+        hdr_value = hdr_value.decode('utf-8')
+        if hdr_name == 'CONTENT-TYPE':
+            environ['CONTENT_TYPE'] = hdr_value
+            continue
+        elif hdr_name == 'CONTENT-LENGTH':
+            environ['CONTENT_LENGTH'] = hdr_value
+            continue
+
+        key = 'HTTP_%s' % hdr_name.replace('-', '_')
+        if key in environ:
+            hdr_value = '%s,%s' % (environ[key], hdr_value)
+
+        environ[key] = hdr_value
+
+    environ['wsgi.url_scheme'] = environ.get('HTTP_X_FORWARDED_PROTO', 'http')
+    return environ
+
+
+async def make_response(status, headers, payload, environ):
+    headers = [(h[0].encode('utf-8'), h[1].encode('utf-8')) for h in headers]
+    if environ['asgi.scope']['type'] == 'websocket':
+        if status.startswith('200 '):
+            await environ['asgi.send']({'type': 'websocket.accept',
+                                        'headers': headers})
+        else:
+            if payload:
+                reason = payload.decode('utf-8') \
+                    if isinstance(payload, bytes) else str(payload)
+                await environ['asgi.send']({'type': 'websocket.close',
+                                            'reason': reason})
+            else:
+                await environ['asgi.send']({'type': 'websocket.close'})
+        return
+
+    await environ['asgi.send']({'type': 'http.response.start',
+                                'status': int(status.split(' ')[0]),
+                                'headers': headers})
+    await environ['asgi.send']({'type': 'http.response.body',
+                                'body': payload})
+
+
+class WebSocket(object):  # pragma: no cover
+    """
+    This wrapper class provides an asgi WebSocket interface that is
+    somewhat compatible with eventlet's implementation.
+    """
+    def __init__(self, handler, server):
+        self.handler = handler
+        self.asgi_receive = None
+        self.asgi_send = None
+
+    async def __call__(self, environ):
+        self.asgi_receive = environ['asgi.receive']
+        self.asgi_send = environ['asgi.send']
+        await self.asgi_send({'type': 'websocket.accept'})
+        await self.handler(self)
+
+    async def close(self):
+        await self.asgi_send({'type': 'websocket.close'})
+
+    async def send(self, message):
+        msg_bytes = None
+        msg_text = None
+        if isinstance(message, bytes):
+            msg_bytes = message
+        else:
+            msg_text = message
+        await self.asgi_send({'type': 'websocket.send',
+                              'bytes': msg_bytes,
+                              'text': msg_text})
+
+    async def wait(self):
+        event = await self.asgi_receive()
+        if event['type'] != 'websocket.receive':
+            raise IOError()
+        return event.get('bytes') or event.get('text')
+
+
+_async = {
+    'asyncio': True,
+    'translate_request': translate_request,
+    'make_response': make_response,
+    'websocket': WebSocket,
+}

venv/lib/python3.11/site-packages/engineio/async_drivers/eventlet.py

@@ -0,0 +1,35 @@
+from __future__ import absolute_import
+
+from eventlet.green.threading import Thread, Event
+from eventlet import queue
+from eventlet import sleep
+from eventlet.websocket import WebSocketWSGI as _WebSocketWSGI
+
+
+class WebSocketWSGI(_WebSocketWSGI):
+    def __init__(self, handler, server):
+        try:
+            super().__init__(
+                handler, max_frame_length=int(server.max_http_buffer_size))
+        except TypeError:  # pragma: no cover
+            # older versions of eventlet do not support a max frame size
+            super().__init__(handler)
+        self._sock = None
+
+    def __call__(self, environ, start_response):
+        if 'eventlet.input' not in environ:
+            raise RuntimeError('You need to use the eventlet server. '
+                               'See the Deployment section of the '
+                               'documentation for more information.')
+        self._sock = environ['eventlet.input'].get_socket()
+        return super().__call__(environ, start_response)
+
+
+_async = {
+    'thread': Thread,
+    'queue': queue.Queue,
+    'queue_empty': queue.Empty,
+    'event': Event,
+    'websocket': WebSocketWSGI,
+    'sleep': sleep,
+}

venv/lib/python3.11/site-packages/engineio/async_drivers/gevent.py

@@ -0,0 +1,63 @@
+from __future__ import absolute_import
+
+import gevent
+from gevent import queue
+from gevent.event import Event
+try:
+    import geventwebsocket  # noqa
+    _websocket_available = True
+except ImportError:
+    _websocket_available = False
+
+
+class Thread(gevent.Greenlet):  # pragma: no cover
+    """
+    This wrapper class provides gevent Greenlet interface that is compatible
+    with the standard library's Thread class.
+    """
+    def __init__(self, target, args=[], kwargs={}):
+        super().__init__(target, *args, **kwargs)
+
+    def _run(self):
+        return self.run()
+
+
+class WebSocketWSGI(object):  # pragma: no cover
+    """
+    This wrapper class provides a gevent WebSocket interface that is
+    compatible with eventlet's implementation.
+    """
+    def __init__(self, handler, server):
+        self.app = handler
+
+    def __call__(self, environ, start_response):
+        if 'wsgi.websocket' not in environ:
+            raise RuntimeError('You need to use the gevent-websocket server. '
+                               'See the Deployment section of the '
+                               'documentation for more information.')
+        self._sock = environ['wsgi.websocket']
+        self.environ = environ
+        self.version = self._sock.version
+        self.path = self._sock.path
+        self.origin = self._sock.origin
+        self.protocol = self._sock.protocol
+        return self.app(self)
+
+    def close(self):
+        return self._sock.close()
+
+    def send(self, message):
+        return self._sock.send(message)
+
+    def wait(self):
+        return self._sock.receive()
+
+
+_async = {
+    'thread': Thread,
+    'queue': queue.JoinableQueue,
+    'queue_empty': queue.Empty,
+    'event': Event,
+    'websocket': WebSocketWSGI if _websocket_available else None,
+    'sleep': gevent.sleep,
+}

venv/lib/python3.11/site-packages/engineio/async_drivers/gevent_uwsgi.py

@@ -0,0 +1,167 @@
+import gevent
+from gevent import queue
+from gevent.event import Event
+from gevent import selectors
+import uwsgi
+_websocket_available = hasattr(uwsgi, 'websocket_handshake')
+
+
+class Thread(gevent.Greenlet):  # pragma: no cover
+    """
+    This wrapper class provides gevent Greenlet interface that is compatible
+    with the standard library's Thread class.
+    """
+    def __init__(self, target, args=[], kwargs={}):
+        super().__init__(target, *args, **kwargs)
+
+    def _run(self):
+        return self.run()
+
+
+class uWSGIWebSocket(object):  # pragma: no cover
+    """
+    This wrapper class provides a uWSGI WebSocket interface that is
+    compatible with eventlet's implementation.
+    """
+    def __init__(self, handler, server):
+        self.app = handler
+        self._sock = None
+        self.received_messages = []
+
+    def __call__(self, environ, start_response):
+        self._sock = uwsgi.connection_fd()
+        self.environ = environ
+
+        uwsgi.websocket_handshake()
+
+        self._req_ctx = None
+        if hasattr(uwsgi, 'request_context'):
+            # uWSGI >= 2.1.x with support for api access across-greenlets
+            self._req_ctx = uwsgi.request_context()
+        else:
+            # use event and queue for sending messages
+            self._event = Event()
+            self._send_queue = queue.Queue()
+
+            # spawn a select greenlet
+            def select_greenlet_runner(fd, event):
+                """Sets event when data becomes available to read on fd."""
+                sel = selectors.DefaultSelector()
+                sel.register(fd, selectors.EVENT_READ)
+                try:
+                    while True:
+                        sel.select()
+                        event.set()
+                except gevent.GreenletExit:
+                    sel.unregister(fd)
+            self._select_greenlet = gevent.spawn(
+                select_greenlet_runner,
+                self._sock,
+                self._event)
+
+        self.app(self)
+
+    def close(self):
+        """Disconnects uWSGI from the client."""
+        if self._req_ctx is None:
+            # better kill it here in case wait() is not called again
+            self._select_greenlet.kill()
+            self._event.set()
+        uwsgi.disconnect()
+
+    def _send(self, msg):
+        """Transmits message either in binary or UTF-8 text mode,
+        depending on its type."""
+        if isinstance(msg, bytes):
+            method = uwsgi.websocket_send_binary
+        else:
+            method = uwsgi.websocket_send
+        if self._req_ctx is not None:
+            method(msg, request_context=self._req_ctx)
+        else:
+            method(msg)
+
+    def _decode_received(self, msg):
+        """Returns either bytes or str, depending on message type."""
+        if not isinstance(msg, bytes):
+            # already decoded - do nothing
+            return msg
+        # only decode from utf-8 if message is not binary data
+        type = ord(msg[0:1])
+        if type >= 48:  # no binary
+            return msg.decode('utf-8')
+        # binary message, don't try to decode
+        return msg
+
+    def send(self, msg):
+        """Queues a message for sending. Real transmission is done in
+        wait method.
+        Sends directly if uWSGI version is new enough."""
+        if self._req_ctx is not None:
+            self._send(msg)
+        else:
+            self._send_queue.put(msg)
+            self._event.set()
+
+    def wait(self):
+        """Waits and returns received messages.
+        If running in compatibility mode for older uWSGI versions,
+        it also sends messages that have been queued by send().
+        A return value of None means that connection was closed.
+        This must be called repeatedly. For uWSGI < 2.1.x it must
+        be called from the main greenlet."""
+        while True:
+            if self._req_ctx is not None:
+                try:
+                    msg = uwsgi.websocket_recv(request_context=self._req_ctx)
+                except IOError:  # connection closed
+                    self.close()
+                    return None
+                return self._decode_received(msg)
+            else:
+                if self.received_messages:
+                    return self.received_messages.pop(0)
+
+                # we wake up at least every 3 seconds to let uWSGI
+                # do its ping/ponging
+                event_set = self._event.wait(timeout=3)
+                if event_set:
+                    self._event.clear()
+                    # maybe there is something to send
+                    msgs = []
+                    while True:
+                        try:
+                            msgs.append(self._send_queue.get(block=False))
+                        except gevent.queue.Empty:
+                            break
+                    for msg in msgs:
+                        try:
+                            self._send(msg)
+                        except IOError:
+                            self.close()
+                            return None
+                # maybe there is something to receive, if not, at least
+                # ensure uWSGI does its ping/ponging
+                while True:
+                    try:
+                        msg = uwsgi.websocket_recv_nb()
+                    except IOError:  # connection closed
+                        self.close()
+                        return None
+                    if msg:  # message available
+                        self.received_messages.append(
+                            self._decode_received(msg))
+                    else:
+                        break
+                if self.received_messages:
+                    return self.received_messages.pop(0)
+
+
+_async = {
+    'thread': Thread,
+    'queue': queue.JoinableQueue,
+    'queue_empty': queue.Empty,
+    'event': Event,
+    'websocket': uWSGIWebSocket if _websocket_available else None,
+    'sleep': gevent.sleep,
+}

venv/lib/python3.11/site-packages/engineio/async_drivers/sanic.py

@@ -0,0 +1,147 @@
+import sys
+from urllib.parse import urlsplit
+
+try:  # pragma: no cover
+    from sanic.response import HTTPResponse
+    try:
+        from sanic.server.protocols.websocket_protocol import WebSocketProtocol
+    except ImportError:
+        print('yay')
+        from sanic.websocket import WebSocketProtocol
+except ImportError:
+    HTTPResponse = None
+    WebSocketProtocol = None
+
+
+def create_route(app, engineio_server, engineio_endpoint):  # pragma: no cover
+    """This function sets up the engine.io endpoint as a route for the
+    application.
+
+    Note that both GET and POST requests must be hooked up on the engine.io
+    endpoint.
+    """
+    app.add_route(engineio_server.handle_request, engineio_endpoint,
+                  methods=['GET', 'POST', 'OPTIONS'])
+    try:
+        app.enable_websocket()
+    except AttributeError:
+        # ignore, this version does not support websocket
+        pass
+
+
+def translate_request(request):  # pragma: no cover
+    """This function takes the arguments passed to the request handler and
+    uses them to generate a WSGI compatible environ dictionary.
+    """
+    class AwaitablePayload(object):
+        def __init__(self, payload):
+            self.payload = payload or b''
+
+        async def read(self, length=None):
+            if length is None:
+                r = self.payload
+                self.payload = b''
+            else:
+                r = self.payload[:length]
+                self.payload = self.payload[length:]
+            return r
+
+    uri_parts = urlsplit(request.url)
+    environ = {
+        'wsgi.input': AwaitablePayload(request.body),
+        'wsgi.errors': sys.stderr,
+        'wsgi.version': (1, 0),
+        'wsgi.async': True,
+        'wsgi.multithread': False,
+        'wsgi.multiprocess': False,
+        'wsgi.run_once': False,
+        'SERVER_SOFTWARE': 'sanic',
+        'REQUEST_METHOD': request.method,
+        'QUERY_STRING': uri_parts.query or '',
+        'RAW_URI': request.url,
+        'SERVER_PROTOCOL': 'HTTP/' + request.version,
+        'REMOTE_ADDR': '127.0.0.1',
+        'REMOTE_PORT': '0',
+        'SERVER_NAME': 'sanic',
+        'SERVER_PORT': '0',
+        'sanic.request': request
+    }
+
+    for hdr_name, hdr_value in request.headers.items():
+        hdr_name = hdr_name.upper()
+        if hdr_name == 'CONTENT-TYPE':
+            environ['CONTENT_TYPE'] = hdr_value
+            continue
+        elif hdr_name == 'CONTENT-LENGTH':
+            environ['CONTENT_LENGTH'] = hdr_value
+            continue
+
+        key = 'HTTP_%s' % hdr_name.replace('-', '_')
+        if key in environ:
+            hdr_value = '%s,%s' % (environ[key], hdr_value)
+
+        environ[key] = hdr_value
+
+    environ['wsgi.url_scheme'] = environ.get('HTTP_X_FORWARDED_PROTO', 'http')
+
+    path_info = uri_parts.path
+
+    environ['PATH_INFO'] = path_info
+    environ['SCRIPT_NAME'] = ''
+
+    return environ
+
+
+def make_response(status, headers, payload, environ):  # pragma: no cover
+    """This function generates an appropriate response object for this async
+    mode.
+    """
+    headers_dict = {}
+    content_type = None
+    for h in headers:
+        if h[0].lower() == 'content-type':
+            content_type = h[1]
+        else:
+            headers_dict[h[0]] = h[1]
+    return HTTPResponse(body=payload, content_type=content_type,
+                        status=int(status.split()[0]), headers=headers_dict)
+
+
+class WebSocket(object):  # pragma: no cover
+    """
+    This wrapper class provides a sanic WebSocket interface that is
+    somewhat compatible with eventlet's implementation.
+    """
+    def __init__(self, handler, server):
+        self.handler = handler
+        self._sock = None
+
+    async def __call__(self, environ):
+        request = environ['sanic.request']
+        protocol = request.transport.get_protocol()
+        self._sock = await protocol.websocket_handshake(request)
+
+        self.environ = environ
+        await self.handler(self)
+
+    async def close(self):
+        await self._sock.close()
+
+    async def send(self, message):
+        await self._sock.send(message)
+
+    async def wait(self):
+        data = await self._sock.recv()
+        if not isinstance(data, bytes) and \
+                not isinstance(data, str):
+            raise IOError()
+        return data
+
+
+_async = {
+    'asyncio': True,
+    'create_route': create_route,
+    'translate_request': translate_request,
+    'make_response': make_response,
+    'websocket': WebSocket if WebSocketProtocol else None,
+}

venv/lib/python3.11/site-packages/engineio/async_drivers/threading.py

@@ -0,0 +1,48 @@
+from __future__ import absolute_import
+import queue
+import threading
+import time
+
+try:
+    from simple_websocket import Server, ConnectionClosed
+    _websocket_available = True
+except ImportError:  # pragma: no cover
+    _websocket_available = False
+
+
+class WebSocketWSGI(object):  # pragma: no cover
+    """
+    This wrapper class provides a threading WebSocket interface that is
+    compatible with eventlet's implementation.
+    """
+    def __init__(self, handler, server):
+        self.app = handler
+
+    def __call__(self, environ, start_response):
+        self.ws = Server(environ)
+        return self.app(self)
+
+    def close(self):
+        return self.ws.close()
+
+    def send(self, message):
+        try:
+            return self.ws.send(message)
+        except ConnectionClosed:
+            raise IOError()
+
+    def wait(self):
+        try:
+            return self.ws.receive()
+        except ConnectionClosed:
+            return None
+
+
+_async = {
+    'thread': threading.Thread,
+    'queue': queue.Queue,
+    'queue_empty': queue.Empty,
+    'event': threading.Event,
+    'websocket': WebSocketWSGI if _websocket_available else None,
+    'sleep': time.sleep,
+}

venv/lib/python3.11/site-packages/engineio/async_drivers/tornado.py

@@ -0,0 +1,182 @@
+import asyncio
+import sys
+from urllib.parse import urlsplit
+from .. import exceptions
+
+import tornado.web
+import tornado.websocket
+
+
+def get_tornado_handler(engineio_server):
+    class Handler(tornado.websocket.WebSocketHandler):  # pragma: no cover
+        def __init__(self, *args, **kwargs):
+            super().__init__(*args, **kwargs)
+            if isinstance(engineio_server.cors_allowed_origins, str):
+                if engineio_server.cors_allowed_origins == '*':
+                    self.allowed_origins = None
+                else:
+                    self.allowed_origins = [
+                        engineio_server.cors_allowed_origins]
+            else:
+                self.allowed_origins = engineio_server.cors_allowed_origins
+            self.receive_queue = asyncio.Queue()
+
+        async def get(self, *args, **kwargs):
+            if self.request.headers.get('Upgrade', '').lower() == 'websocket':
+                ret = super().get(*args, **kwargs)
+                if asyncio.iscoroutine(ret):
+                    await ret
+            else:
+                await engineio_server.handle_request(self)
+
+        async def open(self, *args, **kwargs):
+            # this is the handler for the websocket request
+            asyncio.ensure_future(engineio_server.handle_request(self))
+
+        async def post(self, *args, **kwargs):
+            await engineio_server.handle_request(self)
+
+        async def options(self, *args, **kwargs):
+            await engineio_server.handle_request(self)
+
+        async def on_message(self, message):
+            await self.receive_queue.put(message)
+
+        async def get_next_message(self):
+            return await self.receive_queue.get()
+
+        def on_close(self):
+            self.receive_queue.put_nowait(None)
+
+        def check_origin(self, origin):
+            if self.allowed_origins is None or origin in self.allowed_origins:
+                return True
+            return super().check_origin(origin)
+
+        def get_compression_options(self):
+            # enable compression
+            return {}
+
+    return Handler
+
+
+def translate_request(handler):
+    """This function takes the arguments passed to the request handler and
+    uses them to generate a WSGI compatible environ dictionary.
+    """
+    class AwaitablePayload(object):
+        def __init__(self, payload):
+            self.payload = payload or b''
+
+        async def read(self, length=None):
+            if length is None:
+                r = self.payload
+                self.payload = b''
+            else:
+                r = self.payload[:length]
+                self.payload = self.payload[length:]
+            return r
+
+    payload = handler.request.body
+
+    uri_parts = urlsplit(handler.request.path)
+    full_uri = handler.request.path
+    if handler.request.query:  # pragma: no cover
+        full_uri += '?' + handler.request.query
+    environ = {
+        'wsgi.input': AwaitablePayload(payload),
+        'wsgi.errors': sys.stderr,
+        'wsgi.version': (1, 0),
+        'wsgi.async': True,
+        'wsgi.multithread': False,
+        'wsgi.multiprocess': False,
+        'wsgi.run_once': False,
+        'SERVER_SOFTWARE': 'aiohttp',
+        'REQUEST_METHOD': handler.request.method,
+        'QUERY_STRING': handler.request.query or '',
+        'RAW_URI': full_uri,
+        'SERVER_PROTOCOL': 'HTTP/%s' % handler.request.version,
+        'REMOTE_ADDR': '127.0.0.1',
+        'REMOTE_PORT': '0',
+        'SERVER_NAME': 'aiohttp',
+        'SERVER_PORT': '0',
+        'tornado.handler': handler
+    }
+
+    for hdr_name, hdr_value in handler.request.headers.items():
+        hdr_name = hdr_name.upper()
+        if hdr_name == 'CONTENT-TYPE':
+            environ['CONTENT_TYPE'] = hdr_value
+            continue
+        elif hdr_name == 'CONTENT-LENGTH':
+            environ['CONTENT_LENGTH'] = hdr_value
+            continue
+
+        key = 'HTTP_%s' % hdr_name.replace('-', '_')
+        environ[key] = hdr_value
+
+    environ['wsgi.url_scheme'] = environ.get('HTTP_X_FORWARDED_PROTO', 'http')
+
+    path_info = uri_parts.path
+
+    environ['PATH_INFO'] = path_info
+    environ['SCRIPT_NAME'] = ''
+
+    return environ
+
+
+def make_response(status, headers, payload, environ):
+    """This function generates an appropriate response object for this async
+    mode.
+    """
+    tornado_handler = environ['tornado.handler']
+    try:
+        tornado_handler.set_status(int(status.split()[0]))
+    except RuntimeError:  # pragma: no cover
+        # for websocket connections Tornado does not accept a response, since
+        # it already emitted the 101 status code
+        return
+    for header, value in headers:
+        tornado_handler.set_header(header, value)
+    tornado_handler.write(payload)
+    tornado_handler.finish()
+
+
+class WebSocket(object):  # pragma: no cover
+    """
+    This wrapper class provides a tornado WebSocket interface that is
+    somewhat compatible with eventlet's implementation.
+    """
+    def __init__(self, handler, server):
+        self.handler = handler
+        self.tornado_handler = None
+
+    async def __call__(self, environ):
+        self.tornado_handler = environ['tornado.handler']
+        self.environ = environ
+        await self.handler(self)
+
+    async def close(self):
+        self.tornado_handler.close()
+
+    async def send(self, message):
+        try:
+            self.tornado_handler.write_message(
+                message, binary=isinstance(message, bytes))
+        except tornado.websocket.WebSocketClosedError:
+            raise exceptions.EngineIOError()
+
+    async def wait(self):
+        msg = await self.tornado_handler.get_next_message()
+        if not isinstance(msg, bytes) and \
+                not isinstance(msg, str):
+            raise IOError()
+        return msg
+
+
+_async = {
+    'asyncio': True,
+    'translate_request': translate_request,
+    'make_response': make_response,
+    'websocket': WebSocket,
+}

venv/lib/python3.11/site-packages/engineio/asyncio_client.py

@@ -0,0 +1,640 @@
+import asyncio
+import signal
+import ssl
+import threading
+
+try:
+    import aiohttp
+except ImportError:  # pragma: no cover
+    aiohttp = None
+
+from . import client
+from . import exceptions
+from . import packet
+from . import payload
+
+async_signal_handler_set = False
+
+
+def async_signal_handler():
+    """SIGINT handler.
+
+    Disconnect all active async clients.
+    """
+    async def _handler():  # pragma: no cover
+        for c in client.connected_clients[:]:
+            if c.is_asyncio_based():
+                await c.disconnect()
+
+        # cancel all running tasks
+        tasks = [task for task in asyncio.all_tasks() if task is not
+                 asyncio.current_task()]
+        for task in tasks:
+            task.cancel()
+        await asyncio.gather(*tasks, return_exceptions=True)
+        asyncio.get_event_loop().stop()
+
+    asyncio.ensure_future(_handler())
+
+
+class AsyncClient(client.Client):
+    """An Engine.IO client for asyncio.
+
+    This class implements a fully compliant Engine.IO web client with support
+    for websocket and long-polling transports, compatible with the asyncio
+    framework on Python 3.5 or newer.
+
+    :param logger: To enable logging set to ``True`` or pass a logger object to
+                   use. To disable logging set to ``False``. The default is
+                   ``False``. Note that fatal errors are logged even when
+                   ``logger`` is ``False``.
+    :param json: An alternative json module to use for encoding and decoding
+                 packets. Custom json modules must have ``dumps`` and ``loads``
+                 functions that are compatible with the standard library
+                 versions.
+    :param request_timeout: A timeout in seconds for requests. The default is
+                            5 seconds.
+    :param http_session: an initialized ``aiohttp.ClientSession`` object to be
+                         used when sending requests to the server. Use it if
+                         you need to add special client options such as proxy
+                         servers, SSL certificates, etc.
+    :param ssl_verify: ``True`` to verify SSL certificates, or ``False`` to
+                       skip SSL certificate verification, allowing
+                       connections to servers with self signed certificates.
+                       The default is ``True``.
+    :param handle_sigint: Set to ``True`` to automatically handle disconnection
+                          when the process is interrupted, or to ``False`` to
+                          leave interrupt handling to the calling application.
+                          Interrupt handling can only be enabled when the
+                          client instance is created in the main thread.
+    :param websocket_extra_options: Dictionary containing additional keyword
+                                    arguments passed to
+                                    ``aiohttp.ws_connect()``.
+    """
+
+    def is_asyncio_based(self):
+        return True
+
+    async def connect(self, url, headers=None, transports=None,
+                      engineio_path='engine.io'):
+        """Connect to an Engine.IO server.
+
+        :param url: The URL of the Engine.IO server. It can include custom
+                    query string parameters if required by the server.
+        :param headers: A dictionary with custom headers to send with the
+                        connection request.
+        :param transports: The list of allowed transports. Valid transports
+                           are ``'polling'`` and ``'websocket'``. If not
+                           given, the polling transport is connected first,
+                           then an upgrade to websocket is attempted.
+        :param engineio_path: The endpoint where the Engine.IO server is
+                              installed. The default value is appropriate for
+                              most cases.
+
+        Note: this method is a coroutine.
+
+        Example usage::
+
+            eio = engineio.Client()
+            await eio.connect('http://localhost:5000')
+        """
+        global async_signal_handler_set
+        if self.handle_sigint and not async_signal_handler_set and \
+                threading.current_thread() == threading.main_thread():
+            try:
+                asyncio.get_event_loop().add_signal_handler(
+                    signal.SIGINT, async_signal_handler)
+            except NotImplementedError:  # pragma: no cover
+                self.logger.warning('Signal handler is unsupported')
+        async_signal_handler_set = True
+
+        if self.state != 'disconnected':
+            raise ValueError('Client is not in a disconnected state')
+        valid_transports = ['polling', 'websocket']
+        if transports is not None:
+            if isinstance(transports, str):
+                transports = [transports]
+            transports = [transport for transport in transports
+                          if transport in valid_transports]
+            if not transports:
+                raise ValueError('No valid transports provided')
+        self.transports = transports or valid_transports
+        self.queue = self.create_queue()
+        return await getattr(self, '_connect_' + self.transports[0])(
+            url, headers or {}, engineio_path)
+
+    async def wait(self):
+        """Wait until the connection with the server ends.
+
+        Client applications can use this function to block the main thread
+        during the life of the connection.
+
+        Note: this method is a coroutine.
+        """
+        if self.read_loop_task:
+            await self.read_loop_task
+
+    async def send(self, data):
+        """Send a message to the server.
+
+        :param data: The data to send to the server. Data can be of type
+                     ``str``, ``bytes``, ``list`` or ``dict``. If a ``list``
+                     or ``dict``, the data will be serialized as JSON.
+
+        Note: this method is a coroutine.
+        """
+        await self._send_packet(packet.Packet(packet.MESSAGE, data=data))
+
+    async def disconnect(self, abort=False):
+        """Disconnect from the server.
+
+        :param abort: If set to ``True``, do not wait for background tasks
+                      associated with the connection to end.
+
+        Note: this method is a coroutine.
+        """
+        if self.state == 'connected':
+            await self._send_packet(packet.Packet(packet.CLOSE))
+            await self.queue.put(None)
+            self.state = 'disconnecting'
+            await self._trigger_event('disconnect', run_async=False)
+            if self.current_transport == 'websocket':
+                await self.ws.close()
+            if not abort:
+                await self.read_loop_task
+            self.state = 'disconnected'
+            try:
+                client.connected_clients.remove(self)
+            except ValueError:  # pragma: no cover
+                pass
+        await self._reset()
+
+    def start_background_task(self, target, *args, **kwargs):
+        """Start a background task.
+
+        This is a utility function that applications can use to start a
+        background task.
+
+        :param target: the target function to execute.
+        :param args: arguments to pass to the function.
+        :param kwargs: keyword arguments to pass to the function.
+
+        The return value is a ``asyncio.Task`` object.
+        """
+        return asyncio.ensure_future(target(*args, **kwargs))
+
+    async def sleep(self, seconds=0):
+        """Sleep for the requested amount of time.
+
+        Note: this method is a coroutine.
+        """
+        return await asyncio.sleep(seconds)
+
+    def create_queue(self):
+        """Create a queue object."""
+        q = asyncio.Queue()
+        q.Empty = asyncio.QueueEmpty
+        return q
+
+    def create_event(self):
+        """Create an event object."""
+        return asyncio.Event()
+
+    async def _reset(self):
+        super()._reset()
+        if not self.external_http:  # pragma: no cover
+            if self.http and not self.http.closed:
+                await self.http.close()
+
+    def __del__(self):  # pragma: no cover
+        # try to close the aiohttp session if it is still open
+        if self.http and not self.http.closed:
+            try:
+                loop = asyncio.get_event_loop()
+                if loop.is_running():
+                    loop.ensure_future(self.http.close())
+                else:
+                    loop.run_until_complete(self.http.close())
+            except:
+                pass
+
+    async def _connect_polling(self, url, headers, engineio_path):
+        """Establish a long-polling connection to the Engine.IO server."""
+        if aiohttp is None:  # pragma: no cover
+            self.logger.error('aiohttp not installed -- cannot make HTTP '
+                              'requests!')
+            return
+        self.base_url = self._get_engineio_url(url, engineio_path, 'polling')
+        self.logger.info('Attempting polling connection to ' + self.base_url)
+        r = await self._send_request(
+            'GET', self.base_url + self._get_url_timestamp(), headers=headers,
+            timeout=self.request_timeout)
+        if r is None or isinstance(r, str):
+            await self._reset()
+            raise exceptions.ConnectionError(
+                r or 'Connection refused by the server')
+        if r.status < 200 or r.status >= 300:
+            await self._reset()
+            try:
+                arg = await r.json()
+            except aiohttp.ClientError:
+                arg = None
+            raise exceptions.ConnectionError(
+                'Unexpected status code {} in server response'.format(
+                    r.status), arg)
+        try:
+            p = payload.Payload(encoded_payload=(await r.read()).decode(
+                'utf-8'))
+        except ValueError:
+            raise exceptions.ConnectionError(
+                'Unexpected response from server') from None
+        open_packet = p.packets[0]
+        if open_packet.packet_type != packet.OPEN:
+            raise exceptions.ConnectionError(
+                'OPEN packet not returned by server')
+        self.logger.info(
+            'Polling connection accepted with ' + str(open_packet.data))
+        self.sid = open_packet.data['sid']
+        self.upgrades = open_packet.data['upgrades']
+        self.ping_interval = int(open_packet.data['pingInterval']) / 1000.0
+        self.ping_timeout = int(open_packet.data['pingTimeout']) / 1000.0
+        self.current_transport = 'polling'
+        self.base_url += '&sid=' + self.sid
+
+        self.state = 'connected'
+        client.connected_clients.append(self)
+        await self._trigger_event('connect', run_async=False)
+
+        for pkt in p.packets[1:]:
+            await self._receive_packet(pkt)
+
+        if 'websocket' in self.upgrades and 'websocket' in self.transports:
+            # attempt to upgrade to websocket
+            if await self._connect_websocket(url, headers, engineio_path):
+                # upgrade to websocket succeeded, we're done here
+                return
+
+        self.write_loop_task = self.start_background_task(self._write_loop)
+        self.read_loop_task = self.start_background_task(
+            self._read_loop_polling)
+
+    async def _connect_websocket(self, url, headers, engineio_path):
+        """Establish or upgrade to a WebSocket connection with the server."""
+        if aiohttp is None:  # pragma: no cover
+            self.logger.error('aiohttp package not installed')
+            return False
+        websocket_url = self._get_engineio_url(url, engineio_path,
+                                               'websocket')
+        if self.sid:
+            self.logger.info(
+                'Attempting WebSocket upgrade to ' + websocket_url)
+            upgrade = True
+            websocket_url += '&sid=' + self.sid
+        else:
+            upgrade = False
+            self.base_url = websocket_url
+            self.logger.info(
+                'Attempting WebSocket connection to ' + websocket_url)
+
+        if self.http is None or self.http.closed:  # pragma: no cover
+            self.http = aiohttp.ClientSession()
+
+        # extract any new cookies passed in a header so that they can also be
+        # sent the the WebSocket route
+        cookies = {}
+        for header, value in headers.items():
+            if header.lower() == 'cookie':
+                cookies = dict(
+                    [cookie.split('=', 1) for cookie in value.split('; ')])
+                del headers[header]
+                break
+        self.http.cookie_jar.update_cookies(cookies)
+
+        extra_options = {'timeout': self.request_timeout}
+        if not self.ssl_verify:
+            ssl_context = ssl.create_default_context()
+            ssl_context.check_hostname = False
+            ssl_context.verify_mode = ssl.CERT_NONE
+            extra_options['ssl'] = ssl_context
+
+        # combine internally generated options with the ones supplied by the
+        # caller. The caller's options take precedence.
+        headers.update(self.websocket_extra_options.pop('headers', {}))
+        extra_options['headers'] = headers
+        extra_options.update(self.websocket_extra_options)
+
+        try:
+            ws = await self.http.ws_connect(
+                websocket_url + self._get_url_timestamp(), **extra_options)
+        except (aiohttp.client_exceptions.WSServerHandshakeError,
+                aiohttp.client_exceptions.ServerConnectionError,
+                aiohttp.client_exceptions.ClientConnectionError):
+            if upgrade:
+                self.logger.warning(
+                    'WebSocket upgrade failed: connection error')
+                return False
+            else:
+                raise exceptions.ConnectionError('Connection error')
+        if upgrade:
+            p = packet.Packet(packet.PING, data='probe').encode()
+            try:
+                await ws.send_str(p)
+            except Exception as e:  # pragma: no cover
+                self.logger.warning(
+                    'WebSocket upgrade failed: unexpected send exception: %s',
+                    str(e))
+                return False
+            try:
+                p = (await ws.receive()).data
+            except Exception as e:  # pragma: no cover
+                self.logger.warning(
+                    'WebSocket upgrade failed: unexpected recv exception: %s',
+                    str(e))
+                return False
+            pkt = packet.Packet(encoded_packet=p)
+            if pkt.packet_type != packet.PONG or pkt.data != 'probe':
+                self.logger.warning(
+                    'WebSocket upgrade failed: no PONG packet')
+                return False
+            p = packet.Packet(packet.UPGRADE).encode()
+            try:
+                await ws.send_str(p)
+            except Exception as e:  # pragma: no cover
+                self.logger.warning(
+                    'WebSocket upgrade failed: unexpected send exception: %s',
+                    str(e))
+                return False
+            self.current_transport = 'websocket'
+            self.logger.info('WebSocket upgrade was successful')
+        else:
+            try:
+                p = (await ws.receive()).data
+            except Exception as e:  # pragma: no cover
+                raise exceptions.ConnectionError(
+                    'Unexpected recv exception: ' + str(e))
+            open_packet = packet.Packet(encoded_packet=p)
+            if open_packet.packet_type != packet.OPEN:
+                raise exceptions.ConnectionError('no OPEN packet')
+            self.logger.info(
+                'WebSocket connection accepted with ' + str(open_packet.data))
+            self.sid = open_packet.data['sid']
+            self.upgrades = open_packet.data['upgrades']
+            self.ping_interval = int(open_packet.data['pingInterval']) / 1000.0
+            self.ping_timeout = int(open_packet.data['pingTimeout']) / 1000.0
+            self.current_transport = 'websocket'
+
+            self.state = 'connected'
+            client.connected_clients.append(self)
+            await self._trigger_event('connect', run_async=False)
+
+        self.ws = ws
+        self.write_loop_task = self.start_background_task(self._write_loop)
+        self.read_loop_task = self.start_background_task(
+            self._read_loop_websocket)
+        return True
+
+    async def _receive_packet(self, pkt):
+        """Handle incoming packets from the server."""
+        packet_name = packet.packet_names[pkt.packet_type] \
+            if pkt.packet_type < len(packet.packet_names) else 'UNKNOWN'
+        self.logger.info(
+            'Received packet %s data %s', packet_name,
+            pkt.data if not isinstance(pkt.data, bytes) else '<binary>')
+        if pkt.packet_type == packet.MESSAGE:
+            await self._trigger_event('message', pkt.data, run_async=True)
+        elif pkt.packet_type == packet.PING:
+            await self._send_packet(packet.Packet(packet.PONG, pkt.data))
+        elif pkt.packet_type == packet.CLOSE:
+            await self.disconnect(abort=True)
+        elif pkt.packet_type == packet.NOOP:
+            pass
+        else:
+            self.logger.error('Received unexpected packet of type %s',
+                              pkt.packet_type)
+
+    async def _send_packet(self, pkt):
+        """Queue a packet to be sent to the server."""
+        if self.state != 'connected':
+            return
+        await self.queue.put(pkt)
+        self.logger.info(
+            'Sending packet %s data %s',
+            packet.packet_names[pkt.packet_type],
+            pkt.data if not isinstance(pkt.data, bytes) else '<binary>')
+
+    async def _send_request(
+            self, method, url, headers=None, body=None,
+            timeout=None):  # pragma: no cover
+        if self.http is None or self.http.closed:
+            self.http = aiohttp.ClientSession()
+        http_method = getattr(self.http, method.lower())
+
+        try:
+            if not self.ssl_verify:
+                return await http_method(
+                    url, headers=headers, data=body,
+                    timeout=aiohttp.ClientTimeout(total=timeout), ssl=False)
+            else:
+                return await http_method(
+                    url, headers=headers, data=body,
+                    timeout=aiohttp.ClientTimeout(total=timeout))
+
+        except (aiohttp.ClientError, asyncio.TimeoutError) as exc:
+            self.logger.info('HTTP %s request to %s failed with error %s.',
+                             method, url, exc)
+            return str(exc)
+
+    async def _trigger_event(self, event, *args, **kwargs):
+        """Invoke an event handler."""
+        run_async = kwargs.pop('run_async', False)
+        ret = None
+        if event in self.handlers:
+            if asyncio.iscoroutinefunction(self.handlers[event]) is True:
+                if run_async:
+                    return self.start_background_task(self.handlers[event],
+                                                      *args)
+                else:
+                    try:
+                        ret = await self.handlers[event](*args)
+                    except asyncio.CancelledError:  # pragma: no cover
+                        pass
+                    except:
+                        self.logger.exception(event + ' async handler error')
+                        if event == 'connect':
+                            # if connect handler raised error we reject the
+                            # connection
+                            return False
+            else:
+                if run_async:
+                    async def async_handler():
+                        return self.handlers[event](*args)
+
+                    return self.start_background_task(async_handler)
+                else:
+                    try:
+                        ret = self.handlers[event](*args)
+                    except:
+                        self.logger.exception(event + ' handler error')
+                        if event == 'connect':
+                            # if connect handler raised error we reject the
+                            # connection
+                            return False
+        return ret
+
+    async def _read_loop_polling(self):
+        """Read packets by polling the Engine.IO server."""
+        while self.state == 'connected':
+            self.logger.info(
+                'Sending polling GET request to ' + self.base_url)
+            r = await self._send_request(
+                'GET', self.base_url + self._get_url_timestamp(),
+                timeout=max(self.ping_interval, self.ping_timeout) + 5)
+            if r is None or isinstance(r, str):
+                self.logger.warning(
+                    r or 'Connection refused by the server, aborting')
+                await self.queue.put(None)
+                break
+            if r.status < 200 or r.status >= 300:
+                self.logger.warning('Unexpected status code %s in server '
+                                    'response, aborting', r.status)
+                await self.queue.put(None)
+                break
+            try:
+                p = payload.Payload(encoded_payload=(await r.read()).decode(
+                    'utf-8'))
+            except ValueError:
+                self.logger.warning(
+                    'Unexpected packet from server, aborting')
+                await self.queue.put(None)
+                break
+            for pkt in p.packets:
+                await self._receive_packet(pkt)
+
+        self.logger.info('Waiting for write loop task to end')
+        await self.write_loop_task
+        if self.state == 'connected':
+            await self._trigger_event('disconnect', run_async=False)
+            try:
+                client.connected_clients.remove(self)
+            except ValueError:  # pragma: no cover
+                pass
+            await self._reset()
+        self.logger.info('Exiting read loop task')
+
+    async def _read_loop_websocket(self):
+        """Read packets from the Engine.IO WebSocket connection."""
+        while self.state == 'connected':
+            p = None
+            try:
+                p = await asyncio.wait_for(
+                    self.ws.receive(),
+                    timeout=self.ping_interval + self.ping_timeout)
+                if not isinstance(p.data, (str, bytes)):  # pragma: no cover
+                    self.logger.warning(
+                        'Server sent unexpected packet %s data %s, aborting',
+                        str(p.type), str(p.data))
+                    await self.queue.put(None)
+                    break  # the connection is broken
+                p = p.data
+            except asyncio.TimeoutError:
+                self.logger.warning(
+                    'Server has stopped communicating, aborting')
+                await self.queue.put(None)
+                break
+            except aiohttp.client_exceptions.ServerDisconnectedError:
+                self.logger.info(
+                    'Read loop: WebSocket connection was closed, aborting')
+                await self.queue.put(None)
+                break
+            except Exception as e:
+                self.logger.info(
+                    'Unexpected error receiving packet: "%s", aborting',
+                    str(e))
+                await self.queue.put(None)
+                break
+            try:
+                pkt = packet.Packet(encoded_packet=p)
+            except Exception as e:  # pragma: no cover
+                self.logger.info(
+                    'Unexpected error decoding packet: "%s", aborting', str(e))
+                await self.queue.put(None)
+                break
+            await self._receive_packet(pkt)
+
+        self.logger.info('Waiting for write loop task to end')
+        await self.write_loop_task
+        if self.state == 'connected':
+            await self._trigger_event('disconnect', run_async=False)
+            try:
+                client.connected_clients.remove(self)
+            except ValueError:  # pragma: no cover
+                pass
+            await self._reset()
+        self.logger.info('Exiting read loop task')
+
+    async def _write_loop(self):
+        """This background task sends packages to the server as they are
+        pushed to the send queue.
+        """
+        while self.state == 'connected':
+            # to simplify the timeout handling, use the maximum of the
+            # ping interval and ping timeout as timeout, with an extra 5
+            # seconds grace period
+            timeout = max(self.ping_interval, self.ping_timeout) + 5
+            packets = None
+            try:
+                packets = [await asyncio.wait_for(self.queue.get(), timeout)]
+            except (self.queue.Empty, asyncio.TimeoutError):
+                self.logger.error('packet queue is empty, aborting')
+                break
+            except asyncio.CancelledError:  # pragma: no cover
+                break
+            if packets == [None]:
+                self.queue.task_done()
+                packets = []
+            else:
+                while True:
+                    try:
+                        packets.append(self.queue.get_nowait())
+                    except self.queue.Empty:
+                        break
+                    if packets[-1] is None:
+                        packets = packets[:-1]
+                        self.queue.task_done()
+                        break
+            if not packets:
+                # empty packet list returned -> connection closed
+                break
+            if self.current_transport == 'polling':
+                p = payload.Payload(packets=packets)
+                r = await self._send_request(
+                    'POST', self.base_url, body=p.encode(),
+                    headers={'Content-Type': 'text/plain'},
+                    timeout=self.request_timeout)
+                for pkt in packets:
+                    self.queue.task_done()
+                if r is None or isinstance(r, str):
+                    self.logger.warning(
+                        r or 'Connection refused by the server, aborting')
+                    break
+                if r.status < 200 or r.status >= 300:
+                    self.logger.warning('Unexpected status code %s in server '
+                                        'response, aborting', r.status)
+                    await self._reset()
+                    break
+            else:
+                # websocket
+                try:
+                    for pkt in packets:
+                        if pkt.binary:
+                            await self.ws.send_bytes(pkt.encode())
+                        else:
+                            await self.ws.send_str(pkt.encode())
+                        self.queue.task_done()
+                except (aiohttp.client_exceptions.ServerDisconnectedError,
+                        BrokenPipeError, OSError):
+                    self.logger.info(
+                        'Write loop: WebSocket connection was closed, '
+                        'aborting')
+                    break
+        self.logger.info('Exiting write loop task')

venv/lib/python3.11/site-packages/engineio/asyncio_server.py

@@ -0,0 +1,513 @@
+import asyncio
+import urllib
+
+from . import exceptions
+from . import packet
+from . import server
+from . import asyncio_socket
+
+
+class AsyncServer(server.Server):
+    """An Engine.IO server for asyncio.
+
+    This class implements a fully compliant Engine.IO web server with support
+    for websocket and long-polling transports, compatible with the asyncio
+    framework on Python 3.5 or newer.
+
+    :param async_mode: The asynchronous model to use. See the Deployment
+                       section in the documentation for a description of the
+                       available options. Valid async modes are "aiohttp",
+                       "sanic", "tornado" and "asgi". If this argument is not
+                       given, "aiohttp" is tried first, followed by "sanic",
+                       "tornado", and finally "asgi". The first async mode that
+                       has all its dependencies installed is the one that is
+                       chosen.
+    :param ping_interval: The interval in seconds at which the server pings
+                          the client. The default is 25 seconds. For advanced
+                          control, a two element tuple can be given, where
+                          the first number is the ping interval and the second
+                          is a grace period added by the server.
+    :param ping_timeout: The time in seconds that the client waits for the
+                         server to respond before disconnecting. The default
+                         is 20 seconds.
+    :param max_http_buffer_size: The maximum size of a message.  The default
+                                 is 1,000,000 bytes.
+    :param allow_upgrades: Whether to allow transport upgrades or not.
+    :param http_compression: Whether to compress packages when using the
+                             polling transport.
+    :param compression_threshold: Only compress messages when their byte size
+                                  is greater than this value.
+    :param cookie: If set to a string, it is the name of the HTTP cookie the
+                   server sends back tot he client containing the client
+                   session id. If set to a dictionary, the ``'name'`` key
+                   contains the cookie name and other keys define cookie
+                   attributes, where the value of each attribute can be a
+                   string, a callable with no arguments, or a boolean. If set
+                   to ``None`` (the default), a cookie is not sent to the
+                   client.
+    :param cors_allowed_origins: Origin or list of origins that are allowed to
+                                 connect to this server. Only the same origin
+                                 is allowed by default. Set this argument to
+                                 ``'*'`` to allow all origins, or to ``[]`` to
+                                 disable CORS handling.
+    :param cors_credentials: Whether credentials (cookies, authentication) are
+                             allowed in requests to this server.
+    :param logger: To enable logging set to ``True`` or pass a logger object to
+                   use. To disable logging set to ``False``. Note that fatal
+                   errors are logged even when ``logger`` is ``False``.
+    :param json: An alternative json module to use for encoding and decoding
+                 packets. Custom json modules must have ``dumps`` and ``loads``
+                 functions that are compatible with the standard library
+                 versions.
+    :param async_handlers: If set to ``True``, run message event handlers in
+                           non-blocking threads. To run handlers synchronously,
+                           set to ``False``. The default is ``True``.
+    :param transports: The list of allowed transports. Valid transports
+                       are ``'polling'`` and ``'websocket'``. Defaults to
+                       ``['polling', 'websocket']``.
+    :param kwargs: Reserved for future extensions, any additional parameters
+                   given as keyword arguments will be silently ignored.
+    """
+    def is_asyncio_based(self):
+        return True
+
+    def async_modes(self):
+        return ['aiohttp', 'sanic', 'tornado', 'asgi']
+
+    def attach(self, app, engineio_path='engine.io'):
+        """Attach the Engine.IO server to an application."""
+        engineio_path = engineio_path.strip('/')
+        self._async['create_route'](app, self, '/{}/'.format(engineio_path))
+
+    async def send(self, sid, data):
+        """Send a message to a client.
+
+        :param sid: The session id of the recipient client.
+        :param data: The data to send to the client. Data can be of type
+                     ``str``, ``bytes``, ``list`` or ``dict``. If a ``list``
+                     or ``dict``, the data will be serialized as JSON.
+
+        Note: this method is a coroutine.
+        """
+        try:
+            socket = self._get_socket(sid)
+        except KeyError:
+            # the socket is not available
+            self.logger.warning('Cannot send to sid %s', sid)
+            return
+        await socket.send(packet.Packet(packet.MESSAGE, data=data))
+
+    async def get_session(self, sid):
+        """Return the user session for a client.
+
+        :param sid: The session id of the client.
+
+        The return value is a dictionary. Modifications made to this
+        dictionary are not guaranteed to be preserved. If you want to modify
+        the user session, use the ``session`` context manager instead.
+        """
+        socket = self._get_socket(sid)
+        return socket.session
+
+    async def save_session(self, sid, session):
+        """Store the user session for a client.
+
+        :param sid: The session id of the client.
+        :param session: The session dictionary.
+        """
+        socket = self._get_socket(sid)
+        socket.session = session
+
+    def session(self, sid):
+        """Return the user session for a client with context manager syntax.
+
+        :param sid: The session id of the client.
+
+        This is a context manager that returns the user session dictionary for
+        the client. Any changes that are made to this dictionary inside the
+        context manager block are saved back to the session. Example usage::
+
+            @eio.on('connect')
+            def on_connect(sid, environ):
+                username = authenticate_user(environ)
+                if not username:
+                    return False
+                with eio.session(sid) as session:
+                    session['username'] = username
+
+            @eio.on('message')
+            def on_message(sid, msg):
+                async with eio.session(sid) as session:
+                    print('received message from ', session['username'])
+        """
+        class _session_context_manager(object):
+            def __init__(self, server, sid):
+                self.server = server
+                self.sid = sid
+                self.session = None
+
+            async def __aenter__(self):
+                self.session = await self.server.get_session(sid)
+                return self.session
+
+            async def __aexit__(self, *args):
+                await self.server.save_session(sid, self.session)
+
+        return _session_context_manager(self, sid)
+
+    async def disconnect(self, sid=None):
+        """Disconnect a client.
+
+        :param sid: The session id of the client to close. If this parameter
+                    is not given, then all clients are closed.
+
+        Note: this method is a coroutine.
+        """
+        if sid is not None:
+            try:
+                socket = self._get_socket(sid)
+            except KeyError:  # pragma: no cover
+                # the socket was already closed or gone
+                pass
+            else:
+                await socket.close()
+                if sid in self.sockets:  # pragma: no cover
+                    del self.sockets[sid]
+        else:
+            await asyncio.wait([asyncio.create_task(client.close())
+                                for client in self.sockets.values()])
+            self.sockets = {}
+
+    async def handle_request(self, *args, **kwargs):
+        """Handle an HTTP request from the client.
+
+        This is the entry point of the Engine.IO application. This function
+        returns the HTTP response to deliver to the client.
+
+        Note: this method is a coroutine.
+        """
+        translate_request = self._async['translate_request']
+        if asyncio.iscoroutinefunction(translate_request):
+            environ = await translate_request(*args, **kwargs)
+        else:
+            environ = translate_request(*args, **kwargs)
+
+        if self.cors_allowed_origins != []:
+            # Validate the origin header if present
+            # This is important for WebSocket more than for HTTP, since
+            # browsers only apply CORS controls to HTTP.
+            origin = environ.get('HTTP_ORIGIN')
+            if origin:
+                allowed_origins = self._cors_allowed_origins(environ)
+                if allowed_origins is not None and origin not in \
+                        allowed_origins:
+                    self._log_error_once(
+                        origin + ' is not an accepted origin.', 'bad-origin')
+                    return await self._make_response(
+                        self._bad_request(
+                            origin + ' is not an accepted origin.'),
+                        environ)
+
+        method = environ['REQUEST_METHOD']
+        query = urllib.parse.parse_qs(environ.get('QUERY_STRING', ''))
+
+        sid = query['sid'][0] if 'sid' in query else None
+        jsonp = False
+        jsonp_index = None
+
+        # make sure the client uses an allowed transport
+        transport = query.get('transport', ['polling'])[0]
+        if transport not in self.transports:
+            self._log_error_once('Invalid transport', 'bad-transport')
+            return await self._make_response(
+                self._bad_request('Invalid transport'), environ)
+
+        # make sure the client speaks a compatible Engine.IO version
+        sid = query['sid'][0] if 'sid' in query else None
+        if sid is None and query.get('EIO') != ['4']:
+            self._log_error_once(
+                'The client is using an unsupported version of the Socket.IO '
+                'or Engine.IO protocols', 'bad-version'
+            )
+            return await self._make_response(self._bad_request(
+                'The client is using an unsupported version of the Socket.IO '
+                'or Engine.IO protocols'
+            ), environ)
+
+        if 'j' in query:
+            jsonp = True
+            try:
+                jsonp_index = int(query['j'][0])
+            except (ValueError, KeyError, IndexError):
+                # Invalid JSONP index number
+                pass
+
+        if jsonp and jsonp_index is None:
+            self._log_error_once('Invalid JSONP index number',
+                                 'bad-jsonp-index')
+            r = self._bad_request('Invalid JSONP index number')
+        elif method == 'GET':
+            if sid is None:
+                # transport must be one of 'polling' or 'websocket'.
+                # if 'websocket', the HTTP_UPGRADE header must match.
+                upgrade_header = environ.get('HTTP_UPGRADE').lower() \
+                    if 'HTTP_UPGRADE' in environ else None
+                if transport == 'polling' \
+                        or transport == upgrade_header == 'websocket':
+                    r = await self._handle_connect(environ, transport,
+                                                   jsonp_index)
+                else:
+                    self._log_error_once('Invalid websocket upgrade',
+                                         'bad-upgrade')
+                    r = self._bad_request('Invalid websocket upgrade')
+            else:
+                if sid not in self.sockets:
+                    self._log_error_once('Invalid session ' + sid, 'bad-sid')
+                    r = self._bad_request('Invalid session ' + sid)
+                else:
+                    socket = self._get_socket(sid)
+                    try:
+                        packets = await socket.handle_get_request(environ)
+                        if isinstance(packets, list):
+                            r = self._ok(packets, jsonp_index=jsonp_index)
+                        else:
+                            r = packets
+                    except exceptions.EngineIOError:
+                        if sid in self.sockets:  # pragma: no cover
+                            await self.disconnect(sid)
+                        r = self._bad_request()
+                    if sid in self.sockets and self.sockets[sid].closed:
+                        del self.sockets[sid]
+        elif method == 'POST':
+            if sid is None or sid not in self.sockets:
+                self._log_error_once('Invalid session ' + sid, 'bad-sid')
+                r = self._bad_request('Invalid session ' + sid)
+            else:
+                socket = self._get_socket(sid)
+                try:
+                    await socket.handle_post_request(environ)
+                    r = self._ok(jsonp_index=jsonp_index)
+                except exceptions.EngineIOError:
+                    if sid in self.sockets:  # pragma: no cover
+                        await self.disconnect(sid)
+                    r = self._bad_request()
+                except:  # pragma: no cover
+                    # for any other unexpected errors, we log the error
+                    # and keep going
+                    self.logger.exception('post request handler error')
+                    r = self._ok(jsonp_index=jsonp_index)
+        elif method == 'OPTIONS':
+            r = self._ok()
+        else:
+            self.logger.warning('Method %s not supported', method)
+            r = self._method_not_found()
+        if not isinstance(r, dict):
+            return r
+        if self.http_compression and \
+                len(r['response']) >= self.compression_threshold:
+            encodings = [e.split(';')[0].strip() for e in
+                         environ.get('HTTP_ACCEPT_ENCODING', '').split(',')]
+            for encoding in encodings:
+                if encoding in self.compression_methods:
+                    r['response'] = \
+                        getattr(self, '_' + encoding)(r['response'])
+                    r['headers'] += [('Content-Encoding', encoding)]
+                    break
+        return await self._make_response(r, environ)
+
+    def start_background_task(self, target, *args, **kwargs):
+        """Start a background task using the appropriate async model.
+
+        This is a utility function that applications can use to start a
+        background task using the method that is compatible with the
+        selected async mode.
+
+        :param target: the target function to execute.
+        :param args: arguments to pass to the function.
+        :param kwargs: keyword arguments to pass to the function.
+
+        The return value is a ``asyncio.Task`` object.
+        """
+        return asyncio.ensure_future(target(*args, **kwargs))
+
+    async def sleep(self, seconds=0):
+        """Sleep for the requested amount of time using the appropriate async
+        model.
+
+        This is a utility function that applications can use to put a task to
+        sleep without having to worry about using the correct call for the
+        selected async mode.
+
+        Note: this method is a coroutine.
+        """
+        return await asyncio.sleep(seconds)
+
+    def create_queue(self, *args, **kwargs):
+        """Create a queue object using the appropriate async model.
+
+        This is a utility function that applications can use to create a queue
+        without having to worry about using the correct call for the selected
+        async mode. For asyncio based async modes, this returns an instance of
+        ``asyncio.Queue``.
+        """
+        return asyncio.Queue(*args, **kwargs)
+
+    def get_queue_empty_exception(self):
+        """Return the queue empty exception for the appropriate async model.
+
+        This is a utility function that applications can use to work with a
+        queue without having to worry about using the correct call for the
+        selected async mode. For asyncio based async modes, this returns an
+        instance of ``asyncio.QueueEmpty``.
+        """
+        return asyncio.QueueEmpty
+
+    def create_event(self, *args, **kwargs):
+        """Create an event object using the appropriate async model.
+
+        This is a utility function that applications can use to create an
+        event without having to worry about using the correct call for the
+        selected async mode. For asyncio based async modes, this returns
+        an instance of ``asyncio.Event``.
+        """
+        return asyncio.Event(*args, **kwargs)
+
+    async def _make_response(self, response_dict, environ):
+        cors_headers = self._cors_headers(environ)
+        make_response = self._async['make_response']
+        if asyncio.iscoroutinefunction(make_response):
+            response = await make_response(
+                response_dict['status'],
+                response_dict['headers'] + cors_headers,
+                response_dict['response'], environ)
+        else:
+            response = make_response(
+                response_dict['status'],
+                response_dict['headers'] + cors_headers,
+                response_dict['response'], environ)
+        return response
+
+    async def _handle_connect(self, environ, transport, jsonp_index=None):
+        """Handle a client connection request."""
+        if self.start_service_task:
+            # start the service task to monitor connected clients
+            self.start_service_task = False
+            self.start_background_task(self._service_task)
+
+        sid = self.generate_id()
+        s = asyncio_socket.AsyncSocket(self, sid)
+        self.sockets[sid] = s
+
+        pkt = packet.Packet(
+            packet.OPEN, {'sid': sid,
+                          'upgrades': self._upgrades(sid, transport),
+                          'pingTimeout': int(self.ping_timeout * 1000),
+                          'pingInterval': int(self.ping_interval * 1000)})
+        await s.send(pkt)
+        s.schedule_ping()
+
+        ret = await self._trigger_event('connect', sid, environ,
+                                        run_async=False)
+        if ret is not None and ret is not True:
+            del self.sockets[sid]
+            self.logger.warning('Application rejected connection')
+            return self._unauthorized(ret or None)
+
+        if transport == 'websocket':
+            ret = await s.handle_get_request(environ)
+            if s.closed and sid in self.sockets:
+                # websocket connection ended, so we are done
+                del self.sockets[sid]
+            return ret
+        else:
+            s.connected = True
+            headers = None
+            if self.cookie:
+                if isinstance(self.cookie, dict):
+                    headers = [(
+                        'Set-Cookie',
+                        self._generate_sid_cookie(sid, self.cookie)
+                    )]
+                else:
+                    headers = [(
+                        'Set-Cookie',
+                        self._generate_sid_cookie(sid, {
+                            'name': self.cookie, 'path': '/', 'SameSite': 'Lax'
+                        })
+                    )]
+            try:
+                return self._ok(await s.poll(), headers=headers,
+                                jsonp_index=jsonp_index)
+            except exceptions.QueueEmpty:
+                return self._bad_request()
+
+    async def _trigger_event(self, event, *args, **kwargs):
+        """Invoke an event handler."""
+        run_async = kwargs.pop('run_async', False)
+        ret = None
+        if event in self.handlers:
+            if asyncio.iscoroutinefunction(self.handlers[event]) is True:
+                if run_async:
+                    return self.start_background_task(self.handlers[event],
+                                                      *args)
+                else:
+                    try:
+                        ret = await self.handlers[event](*args)
+                    except asyncio.CancelledError:  # pragma: no cover
+                        pass
+                    except:
+                        self.logger.exception(event + ' async handler error')
+                        if event == 'connect':
+                            # if connect handler raised error we reject the
+                            # connection
+                            return False
+            else:
+                if run_async:
+                    async def async_handler():
+                        return self.handlers[event](*args)
+
+                    return self.start_background_task(async_handler)
+                else:
+                    try:
+                        ret = self.handlers[event](*args)
+                    except:
+                        self.logger.exception(event + ' handler error')
+                        if event == 'connect':
+                            # if connect handler raised error we reject the
+                            # connection
+                            return False
+        return ret
+
+    async def _service_task(self):  # pragma: no cover
+        """Monitor connected clients and clean up those that time out."""
+        while True:
+            if len(self.sockets) == 0:
+                # nothing to do
+                await self.sleep(self.ping_timeout)
+                continue
+
+            # go through the entire client list in a ping interval cycle
+            sleep_interval = self.ping_timeout / len(self.sockets)
+
+            try:
+                # iterate over the current clients
+                for socket in self.sockets.copy().values():
+                    if not socket.closing and not socket.closed:
+                        await socket.check_ping_timeout()
+                    await self.sleep(sleep_interval)
+            except (
+                SystemExit,
+                KeyboardInterrupt,
+                asyncio.CancelledError,
+                GeneratorExit,
+            ):
+                self.logger.info('service task canceled')
+                break
+            except:
+                if asyncio.get_event_loop().is_closed():
+                    self.logger.info('event loop is closed, exiting service '
+                                     'task')
+                    break
+
+                # an unexpected exception has occurred, log it and continue
+                self.logger.exception('service task exception')

venv/lib/python3.11/site-packages/engineio/asyncio_socket.py

@@ -0,0 +1,252 @@
+import asyncio
+import sys
+import time
+
+from . import exceptions
+from . import packet
+from . import payload
+from . import socket
+
+
+class AsyncSocket(socket.Socket):
+    async def poll(self):
+        """Wait for packets to send to the client."""
+        try:
+            packets = [await asyncio.wait_for(
+                self.queue.get(),
+                self.server.ping_interval + self.server.ping_timeout)]
+            self.queue.task_done()
+        except (asyncio.TimeoutError, asyncio.CancelledError):
+            raise exceptions.QueueEmpty()
+        if packets == [None]:
+            return []
+        while True:
+            try:
+                pkt = self.queue.get_nowait()
+                self.queue.task_done()
+                if pkt is None:
+                    self.queue.put_nowait(None)
+                    break
+                packets.append(pkt)
+            except asyncio.QueueEmpty:
+                break
+        return packets
+
+    async def receive(self, pkt):
+        """Receive packet from the client."""
+        self.server.logger.info('%s: Received packet %s data %s',
+                                self.sid, packet.packet_names[pkt.packet_type],
+                                pkt.data if not isinstance(pkt.data, bytes)
+                                else '<binary>')
+        if pkt.packet_type == packet.PONG:
+            self.schedule_ping()
+        elif pkt.packet_type == packet.MESSAGE:
+            await self.server._trigger_event(
+                'message', self.sid, pkt.data,
+                run_async=self.server.async_handlers)
+        elif pkt.packet_type == packet.UPGRADE:
+            await self.send(packet.Packet(packet.NOOP))
+        elif pkt.packet_type == packet.CLOSE:
+            await self.close(wait=False, abort=True)
+        else:
+            raise exceptions.UnknownPacketError()
+
+    async def check_ping_timeout(self):
+        """Make sure the client is still sending pings."""
+        if self.closed:
+            raise exceptions.SocketIsClosedError()
+        if self.last_ping and \
+                time.time() - self.last_ping > self.server.ping_timeout:
+            self.server.logger.info('%s: Client is gone, closing socket',
+                                    self.sid)
+            # Passing abort=False here will cause close() to write a
+            # CLOSE packet. This has the effect of updating half-open sockets
+            # to their correct state of disconnected
+            await self.close(wait=False, abort=False)
+            return False
+        return True
+
+    async def send(self, pkt):
+        """Send a packet to the client."""
+        if not await self.check_ping_timeout():
+            return
+        else:
+            await self.queue.put(pkt)
+        self.server.logger.info('%s: Sending packet %s data %s',
+                                self.sid, packet.packet_names[pkt.packet_type],
+                                pkt.data if not isinstance(pkt.data, bytes)
+                                else '<binary>')
+
+    async def handle_get_request(self, environ):
+        """Handle a long-polling GET request from the client."""
+        connections = [
+            s.strip()
+            for s in environ.get('HTTP_CONNECTION', '').lower().split(',')]
+        transport = environ.get('HTTP_UPGRADE', '').lower()
+        if 'upgrade' in connections and transport in self.upgrade_protocols:
+            self.server.logger.info('%s: Received request to upgrade to %s',
+                                    self.sid, transport)
+            return await getattr(self, '_upgrade_' + transport)(environ)
+        if self.upgrading or self.upgraded:
+            # we are upgrading to WebSocket, do not return any more packets
+            # through the polling endpoint
+            return [packet.Packet(packet.NOOP)]
+        try:
+            packets = await self.poll()
+        except exceptions.QueueEmpty:
+            exc = sys.exc_info()
+            await self.close(wait=False)
+            raise exc[1].with_traceback(exc[2])
+        return packets
+
+    async def handle_post_request(self, environ):
+        """Handle a long-polling POST request from the client."""
+        length = int(environ.get('CONTENT_LENGTH', '0'))
+        if length > self.server.max_http_buffer_size:
+            raise exceptions.ContentTooLongError()
+        else:
+            body = (await environ['wsgi.input'].read(length)).decode('utf-8')
+            p = payload.Payload(encoded_payload=body)
+            for pkt in p.packets:
+                await self.receive(pkt)
+
+    async def close(self, wait=True, abort=False):
+        """Close the socket connection."""
+        if not self.closed and not self.closing:
+            self.closing = True
+            await self.server._trigger_event('disconnect', self.sid)
+            if not abort:
+                await self.send(packet.Packet(packet.CLOSE))
+            self.closed = True
+            if wait:
+                await self.queue.join()
+
+    def schedule_ping(self):
+        async def send_ping():
+            self.last_ping = None
+            await asyncio.sleep(self.server.ping_interval)
+            if not self.closing and not self.closed:
+                self.last_ping = time.time()
+                await self.send(packet.Packet(packet.PING))
+
+        self.server.start_background_task(send_ping)
+
+    async def _upgrade_websocket(self, environ):
+        """Upgrade the connection from polling to websocket."""
+        if self.upgraded:
+            raise IOError('Socket has been upgraded already')
+        if self.server._async['websocket'] is None:
+            # the selected async mode does not support websocket
+            return self.server._bad_request()
+        ws = self.server._async['websocket'](
+            self._websocket_handler, self.server)
+        return await ws(environ)
+
+    async def _websocket_handler(self, ws):
+        """Engine.IO handler for websocket transport."""
+        async def websocket_wait():
+            data = await ws.wait()
+            if data and len(data) > self.server.max_http_buffer_size:
+                raise ValueError('packet is too large')
+            return data
+
+        if self.connected:
+            # the socket was already connected, so this is an upgrade
+            self.upgrading = True  # hold packet sends during the upgrade
+
+            try:
+                pkt = await websocket_wait()
+            except IOError:  # pragma: no cover
+                return
+            decoded_pkt = packet.Packet(encoded_packet=pkt)
+            if decoded_pkt.packet_type != packet.PING or \
+                    decoded_pkt.data != 'probe':
+                self.server.logger.info(
+                    '%s: Failed websocket upgrade, no PING packet', self.sid)
+                self.upgrading = False
+                return
+            await ws.send(packet.Packet(packet.PONG, data='probe').encode())
+            await self.queue.put(packet.Packet(packet.NOOP))  # end poll
+
+            try:
+                pkt = await websocket_wait()
+            except IOError:  # pragma: no cover
+                self.upgrading = False
+                return
+            decoded_pkt = packet.Packet(encoded_packet=pkt)
+            if decoded_pkt.packet_type != packet.UPGRADE:
+                self.upgraded = False
+                self.server.logger.info(
+                    ('%s: Failed websocket upgrade, expected UPGRADE packet, '
+                     'received %s instead.'),
+                    self.sid, pkt)
+                self.upgrading = False
+                return
+            self.upgraded = True
+            self.upgrading = False
+        else:
+            self.connected = True
+            self.upgraded = True
+
+        # start separate writer thread
+        async def writer():
+            while True:
+                packets = None
+                try:
+                    packets = await self.poll()
+                except exceptions.QueueEmpty:
+                    break
+                if not packets:
+                    # empty packet list returned -> connection closed
+                    break
+                try:
+                    for pkt in packets:
+                        await ws.send(pkt.encode())
+                except:
+                    break
+        writer_task = asyncio.ensure_future(writer())
+
+        self.server.logger.info(
+            '%s: Upgrade to websocket successful', self.sid)
+
+        while True:
+            p = None
+            wait_task = asyncio.ensure_future(websocket_wait())
+            try:
+                p = await asyncio.wait_for(
+                    wait_task,
+                    self.server.ping_interval + self.server.ping_timeout)
+            except asyncio.CancelledError:  # pragma: no cover
+                # there is a bug (https://bugs.python.org/issue30508) in
+                # asyncio that causes a "Task exception never retrieved" error
+                # to appear when wait_task raises an exception before it gets
+                # cancelled. Calling wait_task.exception() prevents the error
+                # from being issued in Python 3.6, but causes other errors in
+                # other versions, so we run it with all errors suppressed and
+                # hope for the best.
+                try:
+                    wait_task.exception()
+                except:
+                    pass
+                break
+            except:
+                break
+            if p is None:
+                # connection closed by client
+                break
+            pkt = packet.Packet(encoded_packet=p)
+            try:
+                await self.receive(pkt)
+            except exceptions.UnknownPacketError:  # pragma: no cover
+                pass
+            except exceptions.SocketIsClosedError:  # pragma: no cover
+                self.server.logger.info('Receive error -- socket is closed')
+                break
+            except:  # pragma: no cover
+                # if we get an unexpected exception we log the error and exit
+                # the connection properly
+                self.server.logger.exception('Unknown receive error')
+
+        await self.queue.put(None)  # unlock the writer task so it can exit
+        await asyncio.wait_for(writer_task, timeout=None)
+        await self.close(wait=False, abort=True)

venv/lib/python3.11/site-packages/engineio/client.py

@@ -0,0 +1,727 @@
+from base64 import b64encode
+from engineio.json import JSONDecodeError
+import logging
+import queue
+import signal
+import ssl
+import threading
+import time
+import urllib
+
+try:
+    import requests
+except ImportError:  # pragma: no cover
+    requests = None
+try:
+    import websocket
+except ImportError:  # pragma: no cover
+    websocket = None
+from . import exceptions
+from . import packet
+from . import payload
+
+default_logger = logging.getLogger('engineio.client')
+connected_clients = []
+
+
+def signal_handler(sig, frame):
+    """SIGINT handler.
+
+    Disconnect all active clients and then invoke the original signal handler.
+    """
+    for client in connected_clients[:]:
+        if not client.is_asyncio_based():
+            client.disconnect()
+    if callable(original_signal_handler):
+        return original_signal_handler(sig, frame)
+    else:  # pragma: no cover
+        # Handle case where no original SIGINT handler was present.
+        return signal.default_int_handler(sig, frame)
+
+
+original_signal_handler = None
+
+
+class Client(object):
+    """An Engine.IO client.
+
+    This class implements a fully compliant Engine.IO web client with support
+    for websocket and long-polling transports.
+
+    :param logger: To enable logging set to ``True`` or pass a logger object to
+                   use. To disable logging set to ``False``. The default is
+                   ``False``. Note that fatal errors are logged even when
+                   ``logger`` is ``False``.
+    :param json: An alternative json module to use for encoding and decoding
+                 packets. Custom json modules must have ``dumps`` and ``loads``
+                 functions that are compatible with the standard library
+                 versions.
+    :param request_timeout: A timeout in seconds for requests. The default is
+                            5 seconds.
+    :param http_session: an initialized ``requests.Session`` object to be used
+                         when sending requests to the server. Use it if you
+                         need to add special client options such as proxy
+                         servers, SSL certificates, custom CA bundle, etc.
+    :param ssl_verify: ``True`` to verify SSL certificates, or ``False`` to
+                       skip SSL certificate verification, allowing
+                       connections to servers with self signed certificates.
+                       The default is ``True``.
+    :param handle_sigint: Set to ``True`` to automatically handle disconnection
+                          when the process is interrupted, or to ``False`` to
+                          leave interrupt handling to the calling application.
+                          Interrupt handling can only be enabled when the
+                          client instance is created in the main thread.
+    :param websocket_extra_options: Dictionary containing additional keyword
+                                    arguments passed to
+                                    ``websocket.create_connection()``.
+    """
+    event_names = ['connect', 'disconnect', 'message']
+
+    def __init__(self, logger=False, json=None, request_timeout=5,
+                 http_session=None, ssl_verify=True, handle_sigint=True,
+                 websocket_extra_options=None):
+        global original_signal_handler
+        if handle_sigint and original_signal_handler is None and \
+                threading.current_thread() == threading.main_thread():
+            original_signal_handler = signal.signal(signal.SIGINT,
+                                                    signal_handler)
+        self.handlers = {}
+        self.base_url = None
+        self.transports = None
+        self.current_transport = None
+        self.sid = None
+        self.upgrades = None
+        self.ping_interval = None
+        self.ping_timeout = None
+        self.http = http_session
+        self.external_http = http_session is not None
+        self.handle_sigint = handle_sigint
+        self.ws = None
+        self.read_loop_task = None
+        self.write_loop_task = None
+        self.queue = None
+        self.state = 'disconnected'
+        self.ssl_verify = ssl_verify
+        self.websocket_extra_options = websocket_extra_options or {}
+
+        if json is not None:
+            packet.Packet.json = json
+        if not isinstance(logger, bool):
+            self.logger = logger
+        else:
+            self.logger = default_logger
+            if self.logger.level == logging.NOTSET:
+                if logger:
+                    self.logger.setLevel(logging.INFO)
+                else:
+                    self.logger.setLevel(logging.ERROR)
+                self.logger.addHandler(logging.StreamHandler())
+
+        self.request_timeout = request_timeout
+
+    def is_asyncio_based(self):
+        return False
+
+    def on(self, event, handler=None):
+        """Register an event handler.
+
+        :param event: The event name. Can be ``'connect'``, ``'message'`` or
+                      ``'disconnect'``.
+        :param handler: The function that should be invoked to handle the
+                        event. When this parameter is not given, the method
+                        acts as a decorator for the handler function.
+
+        Example usage::
+
+            # as a decorator:
+            @eio.on('connect')
+            def connect_handler():
+                print('Connection request')
+
+            # as a method:
+            def message_handler(msg):
+                print('Received message: ', msg)
+                eio.send('response')
+            eio.on('message', message_handler)
+        """
+        if event not in self.event_names:
+            raise ValueError('Invalid event')
+
+        def set_handler(handler):
+            self.handlers[event] = handler
+            return handler
+
+        if handler is None:
+            return set_handler
+        set_handler(handler)
+
+    def connect(self, url, headers=None, transports=None,
+                engineio_path='engine.io'):
+        """Connect to an Engine.IO server.
+
+        :param url: The URL of the Engine.IO server. It can include custom
+                    query string parameters if required by the server.
+        :param headers: A dictionary with custom headers to send with the
+                        connection request.
+        :param transports: The list of allowed transports. Valid transports
+                           are ``'polling'`` and ``'websocket'``. If not
+                           given, the polling transport is connected first,
+                           then an upgrade to websocket is attempted.
+        :param engineio_path: The endpoint where the Engine.IO server is
+                              installed. The default value is appropriate for
+                              most cases.
+
+        Example usage::
+
+            eio = engineio.Client()
+            eio.connect('http://localhost:5000')
+        """
+        if self.state != 'disconnected':
+            raise ValueError('Client is not in a disconnected state')
+        valid_transports = ['polling', 'websocket']
+        if transports is not None:
+            if isinstance(transports, str):
+                transports = [transports]
+            transports = [transport for transport in transports
+                          if transport in valid_transports]
+            if not transports:
+                raise ValueError('No valid transports provided')
+        self.transports = transports or valid_transports
+        self.queue = self.create_queue()
+        return getattr(self, '_connect_' + self.transports[0])(
+            url, headers or {}, engineio_path)
+
+    def wait(self):
+        """Wait until the connection with the server ends.
+
+        Client applications can use this function to block the main thread
+        during the life of the connection.
+        """
+        if self.read_loop_task:
+            self.read_loop_task.join()
+
+    def send(self, data):
+        """Send a message to the server.
+
+        :param data: The data to send to the server. Data can be of type
+                     ``str``, ``bytes``, ``list`` or ``dict``. If a ``list``
+                     or ``dict``, the data will be serialized as JSON.
+        """
+        self._send_packet(packet.Packet(packet.MESSAGE, data=data))
+
+    def disconnect(self, abort=False):
+        """Disconnect from the server.
+
+        :param abort: If set to ``True``, do not wait for background tasks
+                      associated with the connection to end.
+        """
+        if self.state == 'connected':
+            self._send_packet(packet.Packet(packet.CLOSE))
+            self.queue.put(None)
+            self.state = 'disconnecting'
+            self._trigger_event('disconnect', run_async=False)
+            if self.current_transport == 'websocket':
+                self.ws.close()
+            if not abort:
+                self.read_loop_task.join()
+            self.state = 'disconnected'
+            try:
+                connected_clients.remove(self)
+            except ValueError:  # pragma: no cover
+                pass
+        self._reset()
+
+    def transport(self):
+        """Return the name of the transport currently in use.
+
+        The possible values returned by this function are ``'polling'`` and
+        ``'websocket'``.
+        """
+        return self.current_transport
+
+    def start_background_task(self, target, *args, **kwargs):
+        """Start a background task.
+
+        This is a utility function that applications can use to start a
+        background task.
+
+        :param target: the target function to execute.
+        :param args: arguments to pass to the function.
+        :param kwargs: keyword arguments to pass to the function.
+
+        This function returns an object that represents the background task,
+        on which the ``join()`` method can be invoked to wait for the task to
+        complete.
+        """
+        th = threading.Thread(target=target, args=args, kwargs=kwargs)
+        th.start()
+        return th
+
+    def sleep(self, seconds=0):
+        """Sleep for the requested amount of time."""
+        return time.sleep(seconds)
+
+    def create_queue(self, *args, **kwargs):
+        """Create a queue object."""
+        q = queue.Queue(*args, **kwargs)
+        q.Empty = queue.Empty
+        return q
+
+    def create_event(self, *args, **kwargs):
+        """Create an event object."""
+        return threading.Event(*args, **kwargs)
+
+    def _reset(self):
+        self.state = 'disconnected'
+        self.sid = None
+
+    def _connect_polling(self, url, headers, engineio_path):
+        """Establish a long-polling connection to the Engine.IO server."""
+        if requests is None:  # pragma: no cover
+            # not installed
+            self.logger.error('requests package is not installed -- cannot '
+                              'send HTTP requests!')
+            return
+        self.base_url = self._get_engineio_url(url, engineio_path, 'polling')
+        self.logger.info('Attempting polling connection to ' + self.base_url)
+        r = self._send_request(
+            'GET', self.base_url + self._get_url_timestamp(), headers=headers,
+            timeout=self.request_timeout)
+        if r is None or isinstance(r, str):
+            self._reset()
+            raise exceptions.ConnectionError(
+                r or 'Connection refused by the server')
+        if r.status_code < 200 or r.status_code >= 300:
+            self._reset()
+            try:
+                arg = r.json()
+            except JSONDecodeError:
+                arg = None
+            raise exceptions.ConnectionError(
+                'Unexpected status code {} in server response'.format(
+                    r.status_code), arg)
+        try:
+            p = payload.Payload(encoded_payload=r.content.decode('utf-8'))
+        except ValueError:
+            raise exceptions.ConnectionError(
+                'Unexpected response from server') from None
+        open_packet = p.packets[0]
+        if open_packet.packet_type != packet.OPEN:
+            raise exceptions.ConnectionError(
+                'OPEN packet not returned by server')
+        self.logger.info(
+            'Polling connection accepted with ' + str(open_packet.data))
+        self.sid = open_packet.data['sid']
+        self.upgrades = open_packet.data['upgrades']
+        self.ping_interval = int(open_packet.data['pingInterval']) / 1000.0
+        self.ping_timeout = int(open_packet.data['pingTimeout']) / 1000.0
+        self.current_transport = 'polling'
+        self.base_url += '&sid=' + self.sid
+
+        self.state = 'connected'
+        connected_clients.append(self)
+        self._trigger_event('connect', run_async=False)
+
+        for pkt in p.packets[1:]:
+            self._receive_packet(pkt)
+
+        if 'websocket' in self.upgrades and 'websocket' in self.transports:
+            # attempt to upgrade to websocket
+            if self._connect_websocket(url, headers, engineio_path):
+                # upgrade to websocket succeeded, we're done here
+                return
+
+        # start background tasks associated with this client
+        self.write_loop_task = self.start_background_task(self._write_loop)
+        self.read_loop_task = self.start_background_task(
+            self._read_loop_polling)
+
+    def _connect_websocket(self, url, headers, engineio_path):
+        """Establish or upgrade to a WebSocket connection with the server."""
+        if websocket is None:  # pragma: no cover
+            # not installed
+            self.logger.error('websocket-client package not installed, only '
+                              'polling transport is available')
+            return False
+        websocket_url = self._get_engineio_url(url, engineio_path, 'websocket')
+        if self.sid:
+            self.logger.info(
+                'Attempting WebSocket upgrade to ' + websocket_url)
+            upgrade = True
+            websocket_url += '&sid=' + self.sid
+        else:
+            upgrade = False
+            self.base_url = websocket_url
+            self.logger.info(
+                'Attempting WebSocket connection to ' + websocket_url)
+
+        # get cookies and other settings from the long-polling connection
+        # so that they are preserved when connecting to the WebSocket route
+        cookies = None
+        extra_options = {}
+        if self.http:
+            # cookies
+            cookies = '; '.join(["{}={}".format(cookie.name, cookie.value)
+                                 for cookie in self.http.cookies])
+            for header, value in headers.items():
+                if header.lower() == 'cookie':
+                    if cookies:
+                        cookies += '; '
+                    cookies += value
+                    del headers[header]
+                    break
+
+            # auth
+            if 'Authorization' not in headers and self.http.auth is not None:
+                if not isinstance(self.http.auth, tuple):  # pragma: no cover
+                    raise ValueError('Only basic authentication is supported')
+                basic_auth = '{}:{}'.format(
+                    self.http.auth[0], self.http.auth[1]).encode('utf-8')
+                basic_auth = b64encode(basic_auth).decode('utf-8')
+                headers['Authorization'] = 'Basic ' + basic_auth
+
+            # cert
+            # this can be given as ('certfile', 'keyfile') or just 'certfile'
+            if isinstance(self.http.cert, tuple):
+                extra_options['sslopt'] = {
+                    'certfile': self.http.cert[0],
+                    'keyfile': self.http.cert[1]}
+            elif self.http.cert:
+                extra_options['sslopt'] = {'certfile': self.http.cert}
+
+            # proxies
+            if self.http.proxies:
+                proxy_url = None
+                if websocket_url.startswith('ws://'):
+                    proxy_url = self.http.proxies.get(
+                        'ws', self.http.proxies.get('http'))
+                else:  # wss://
+                    proxy_url = self.http.proxies.get(
+                        'wss', self.http.proxies.get('https'))
+                if proxy_url:
+                    parsed_url = urllib.parse.urlparse(
+                        proxy_url if '://' in proxy_url
+                        else 'scheme://' + proxy_url)
+                    extra_options['http_proxy_host'] = parsed_url.hostname
+                    extra_options['http_proxy_port'] = parsed_url.port
+                    extra_options['http_proxy_auth'] = (
+                        (parsed_url.username, parsed_url.password)
+                        if parsed_url.username or parsed_url.password
+                        else None)
+
+            # verify
+            if isinstance(self.http.verify, str):
+                if 'sslopt' in extra_options:
+                    extra_options['sslopt']['ca_certs'] = self.http.verify
+                else:
+                    extra_options['sslopt'] = {'ca_certs': self.http.verify}
+            elif not self.http.verify:
+                self.ssl_verify = False
+
+        if not self.ssl_verify:
+            extra_options['sslopt'] = {"cert_reqs": ssl.CERT_NONE}
+
+        # combine internally generated options with the ones supplied by the
+        # caller. The caller's options take precedence.
+        headers.update(self.websocket_extra_options.pop('header', {}))
+        extra_options['header'] = headers
+        extra_options['cookie'] = cookies
+        extra_options['enable_multithread'] = True
+        extra_options['timeout'] = self.request_timeout
+        extra_options.update(self.websocket_extra_options)
+        try:
+            ws = websocket.create_connection(
+                websocket_url + self._get_url_timestamp(), **extra_options)
+        except (ConnectionError, IOError, websocket.WebSocketException):
+            if upgrade:
+                self.logger.warning(
+                    'WebSocket upgrade failed: connection error')
+                return False
+            else:
+                raise exceptions.ConnectionError('Connection error')
+        if upgrade:
+            p = packet.Packet(packet.PING, data='probe').encode()
+            try:
+                ws.send(p)
+            except Exception as e:  # pragma: no cover
+                self.logger.warning(
+                    'WebSocket upgrade failed: unexpected send exception: %s',
+                    str(e))
+                return False
+            try:
+                p = ws.recv()
+            except Exception as e:  # pragma: no cover
+                self.logger.warning(
+                    'WebSocket upgrade failed: unexpected recv exception: %s',
+                    str(e))
+                return False
+            pkt = packet.Packet(encoded_packet=p)
+            if pkt.packet_type != packet.PONG or pkt.data != 'probe':
+                self.logger.warning(
+                    'WebSocket upgrade failed: no PONG packet')
+                return False
+            p = packet.Packet(packet.UPGRADE).encode()
+            try:
+                ws.send(p)
+            except Exception as e:  # pragma: no cover
+                self.logger.warning(
+                    'WebSocket upgrade failed: unexpected send exception: %s',
+                    str(e))
+                return False
+            self.current_transport = 'websocket'
+            self.logger.info('WebSocket upgrade was successful')
+        else:
+            try:
+                p = ws.recv()
+            except Exception as e:  # pragma: no cover
+                raise exceptions.ConnectionError(
+                    'Unexpected recv exception: ' + str(e))
+            open_packet = packet.Packet(encoded_packet=p)
+            if open_packet.packet_type != packet.OPEN:
+                raise exceptions.ConnectionError('no OPEN packet')
+            self.logger.info(
+                'WebSocket connection accepted with ' + str(open_packet.data))
+            self.sid = open_packet.data['sid']
+            self.upgrades = open_packet.data['upgrades']
+            self.ping_interval = int(open_packet.data['pingInterval']) / 1000.0
+            self.ping_timeout = int(open_packet.data['pingTimeout']) / 1000.0
+            self.current_transport = 'websocket'
+
+            self.state = 'connected'
+            connected_clients.append(self)
+            self._trigger_event('connect', run_async=False)
+        self.ws = ws
+        self.ws.settimeout(self.ping_interval + self.ping_timeout)
+
+        # start background tasks associated with this client
+        self.write_loop_task = self.start_background_task(self._write_loop)
+        self.read_loop_task = self.start_background_task(
+            self._read_loop_websocket)
+        return True
+
+    def _receive_packet(self, pkt):
+        """Handle incoming packets from the server."""
+        packet_name = packet.packet_names[pkt.packet_type] \
+            if pkt.packet_type < len(packet.packet_names) else 'UNKNOWN'
+        self.logger.info(
+            'Received packet %s data %s', packet_name,
+            pkt.data if not isinstance(pkt.data, bytes) else '<binary>')
+        if pkt.packet_type == packet.MESSAGE:
+            self._trigger_event('message', pkt.data, run_async=True)
+        elif pkt.packet_type == packet.PING:
+            self._send_packet(packet.Packet(packet.PONG, pkt.data))
+        elif pkt.packet_type == packet.CLOSE:
+            self.disconnect(abort=True)
+        elif pkt.packet_type == packet.NOOP:
+            pass
+        else:
+            self.logger.error('Received unexpected packet of type %s',
+                              pkt.packet_type)
+
+    def _send_packet(self, pkt):
+        """Queue a packet to be sent to the server."""
+        if self.state != 'connected':
+            return
+        self.queue.put(pkt)
+        self.logger.info(
+            'Sending packet %s data %s',
+            packet.packet_names[pkt.packet_type],
+            pkt.data if not isinstance(pkt.data, bytes) else '<binary>')
+
+    def _send_request(
+            self, method, url, headers=None, body=None,
+            timeout=None):  # pragma: no cover
+        if self.http is None:
+            self.http = requests.Session()
+        if not self.ssl_verify:
+            self.http.verify = False
+        try:
+            return self.http.request(method, url, headers=headers, data=body,
+                                     timeout=timeout)
+        except requests.exceptions.RequestException as exc:
+            self.logger.info('HTTP %s request to %s failed with error %s.',
+                             method, url, exc)
+            return str(exc)
+
+    def _trigger_event(self, event, *args, **kwargs):
+        """Invoke an event handler."""
+        run_async = kwargs.pop('run_async', False)
+        if event in self.handlers:
+            if run_async:
+                return self.start_background_task(self.handlers[event], *args)
+            else:
+                try:
+                    return self.handlers[event](*args)
+                except:
+                    self.logger.exception(event + ' handler error')
+
+    def _get_engineio_url(self, url, engineio_path, transport):
+        """Generate the Engine.IO connection URL."""
+        engineio_path = engineio_path.strip('/')
+        parsed_url = urllib.parse.urlparse(url)
+
+        if transport == 'polling':
+            scheme = 'http'
+        elif transport == 'websocket':
+            scheme = 'ws'
+        else:  # pragma: no cover
+            raise ValueError('invalid transport')
+        if parsed_url.scheme in ['https', 'wss']:
+            scheme += 's'
+
+        return ('{scheme}://{netloc}/{path}/?{query}'
+                '{sep}transport={transport}&EIO=4').format(
+                    scheme=scheme, netloc=parsed_url.netloc,
+                    path=engineio_path, query=parsed_url.query,
+                    sep='&' if parsed_url.query else '',
+                    transport=transport)
+
+    def _get_url_timestamp(self):
+        """Generate the Engine.IO query string timestamp."""
+        return '&t=' + str(time.time())
+
+    def _read_loop_polling(self):
+        """Read packets by polling the Engine.IO server."""
+        while self.state == 'connected':
+            self.logger.info(
+                'Sending polling GET request to ' + self.base_url)
+            r = self._send_request(
+                'GET', self.base_url + self._get_url_timestamp(),
+                timeout=max(self.ping_interval, self.ping_timeout) + 5)
+            if r is None or isinstance(r, str):
+                self.logger.warning(
+                    r or 'Connection refused by the server, aborting')
+                self.queue.put(None)
+                break
+            if r.status_code < 200 or r.status_code >= 300:
+                self.logger.warning('Unexpected status code %s in server '
+                                    'response, aborting', r.status_code)
+                self.queue.put(None)
+                break
+            try:
+                p = payload.Payload(encoded_payload=r.content.decode('utf-8'))
+            except ValueError:
+                self.logger.warning(
+                    'Unexpected packet from server, aborting')
+                self.queue.put(None)
+                break
+            for pkt in p.packets:
+                self._receive_packet(pkt)
+
+        self.logger.info('Waiting for write loop task to end')
+        self.write_loop_task.join()
+        if self.state == 'connected':
+            self._trigger_event('disconnect', run_async=False)
+            try:
+                connected_clients.remove(self)
+            except ValueError:  # pragma: no cover
+                pass
+            self._reset()
+        self.logger.info('Exiting read loop task')
+
+    def _read_loop_websocket(self):
+        """Read packets from the Engine.IO WebSocket connection."""
+        while self.state == 'connected':
+            p = None
+            try:
+                p = self.ws.recv()
+            except websocket.WebSocketTimeoutException:
+                self.logger.warning(
+                    'Server has stopped communicating, aborting')
+                self.queue.put(None)
+                break
+            except websocket.WebSocketConnectionClosedException:
+                self.logger.warning(
+                    'WebSocket connection was closed, aborting')
+                self.queue.put(None)
+                break
+            except Exception as e:
+                self.logger.info(
+                    'Unexpected error receiving packet: "%s", aborting',
+                    str(e))
+                self.queue.put(None)
+                break
+            try:
+                pkt = packet.Packet(encoded_packet=p)
+            except Exception as e:  # pragma: no cover
+                self.logger.info(
+                    'Unexpected error decoding packet: "%s", aborting', str(e))
+                self.queue.put(None)
+                break
+            self._receive_packet(pkt)
+
+        self.logger.info('Waiting for write loop task to end')
+        self.write_loop_task.join()
+        if self.state == 'connected':
+            self._trigger_event('disconnect', run_async=False)
+            try:
+                connected_clients.remove(self)
+            except ValueError:  # pragma: no cover
+                pass
+            self._reset()
+        self.logger.info('Exiting read loop task')
+
+    def _write_loop(self):
+        """This background task sends packages to the server as they are
+        pushed to the send queue.
+        """
+        while self.state == 'connected':
+            # to simplify the timeout handling, use the maximum of the
+            # ping interval and ping timeout as timeout, with an extra 5
+            # seconds grace period
+            timeout = max(self.ping_interval, self.ping_timeout) + 5
+            packets = None
+            try:
+                packets = [self.queue.get(timeout=timeout)]
+            except self.queue.Empty:
+                self.logger.error('packet queue is empty, aborting')
+                break
+            if packets == [None]:
+                self.queue.task_done()
+                packets = []
+            else:
+                while True:
+                    try:
+                        packets.append(self.queue.get(block=False))
+                    except self.queue.Empty:
+                        break
+                    if packets[-1] is None:
+                        packets = packets[:-1]
+                        self.queue.task_done()
+                        break
+            if not packets:
+                # empty packet list returned -> connection closed
+                break
+            if self.current_transport == 'polling':
+                p = payload.Payload(packets=packets)
+                r = self._send_request(
+                    'POST', self.base_url, body=p.encode(),
+                    headers={'Content-Type': 'text/plain'},
+                    timeout=self.request_timeout)
+                for pkt in packets:
+                    self.queue.task_done()
+                if r is None or isinstance(r, str):
+                    self.logger.warning(
+                        r or 'Connection refused by the server, aborting')
+                    break
+                if r.status_code < 200 or r.status_code >= 300:
+                    self.logger.warning('Unexpected status code %s in server '
+                                        'response, aborting', r.status_code)
+                    self._reset()
+                    break
+            else:
+                # websocket
+                try:
+                    for pkt in packets:
+                        encoded_packet = pkt.encode()
+                        if pkt.binary:
+                            self.ws.send_binary(encoded_packet)
+                        else:
+                            self.ws.send(encoded_packet)
+                        self.queue.task_done()
+                except (websocket.WebSocketConnectionClosedException,
+                        BrokenPipeError, OSError):
+                    self.logger.warning(
+                        'WebSocket connection was closed, aborting')
+                    break
+        self.logger.info('Exiting write loop task')

venv/lib/python3.11/site-packages/engineio/exceptions.py

@@ -0,0 +1,22 @@
+class EngineIOError(Exception):
+    pass
+
+
+class ContentTooLongError(EngineIOError):
+    pass
+
+
+class UnknownPacketError(EngineIOError):
+    pass
+
+
+class QueueEmpty(EngineIOError):
+    pass
+
+
+class SocketIsClosedError(EngineIOError):
+    pass
+
+
+class ConnectionError(EngineIOError):
+    pass

venv/lib/python3.11/site-packages/engineio/json.py

@@ -0,0 +1,16 @@
+"""JSON-compatible module with sane defaults."""
+
+from json import *  # noqa: F401, F403
+from json import loads as original_loads
+
+
+def _safe_int(s):
+    if len(s) > 100:
+        raise ValueError('Integer is too large')
+    return int(s)
+
+
+def loads(*args, **kwargs):
+    if 'parse_int' not in kwargs:  # pragma: no cover
+        kwargs['parse_int'] = _safe_int
+    return original_loads(*args, **kwargs)

venv/lib/python3.11/site-packages/engineio/middleware.py

@@ -0,0 +1,86 @@
+import os
+from engineio.static_files import get_static_file
+
+
+class WSGIApp(object):
+    """WSGI application middleware for Engine.IO.
+
+    This middleware dispatches traffic to an Engine.IO application. It can
+    also serve a list of static files to the client, or forward unrelated
+    HTTP traffic to another WSGI application.
+
+    :param engineio_app: The Engine.IO server. Must be an instance of the
+                         ``engineio.Server`` class.
+    :param wsgi_app: The WSGI app that receives all other traffic.
+    :param static_files: A dictionary with static file mapping rules. See the
+                         documentation for details on this argument.
+    :param engineio_path: The endpoint where the Engine.IO application should
+                          be installed. The default value is appropriate for
+                          most cases.
+
+    Example usage::
+
+        import engineio
+        import eventlet
+
+        eio = engineio.Server()
+        app = engineio.WSGIApp(eio, static_files={
+            '/': {'content_type': 'text/html', 'filename': 'index.html'},
+            '/index.html': {'content_type': 'text/html',
+                            'filename': 'index.html'},
+        })
+        eventlet.wsgi.server(eventlet.listen(('', 8000)), app)
+    """
+    def __init__(self, engineio_app, wsgi_app=None, static_files=None,
+                 engineio_path='engine.io'):
+        self.engineio_app = engineio_app
+        self.wsgi_app = wsgi_app
+        self.engineio_path = engineio_path
+        if not self.engineio_path.startswith('/'):
+            self.engineio_path = '/' + self.engineio_path
+        if not self.engineio_path.endswith('/'):
+            self.engineio_path += '/'
+        self.static_files = static_files or {}
+
+    def __call__(self, environ, start_response):
+        if 'gunicorn.socket' in environ:
+            # gunicorn saves the socket under environ['gunicorn.socket'], while
+            # eventlet saves it under environ['eventlet.input']. Eventlet also
+            # stores the socket inside a wrapper class, while gunicon writes it
+            # directly into the environment. To give eventlet's WebSocket
+            # module access to this socket when running under gunicorn, here we
+            # copy the socket to the eventlet format.
+            class Input(object):
+                def __init__(self, socket):
+                    self.socket = socket
+
+                def get_socket(self):
+                    return self.socket
+
+            environ['eventlet.input'] = Input(environ['gunicorn.socket'])
+        path = environ['PATH_INFO']
+        if path is not None and path.startswith(self.engineio_path):
+            return self.engineio_app.handle_request(environ, start_response)
+        else:
+            static_file = get_static_file(path, self.static_files) \
+                if self.static_files else None
+            if static_file and os.path.exists(static_file['filename']):
+                start_response(
+                    '200 OK',
+                    [('Content-Type', static_file['content_type'])])
+                with open(static_file['filename'], 'rb') as f:
+                    return [f.read()]
+            elif self.wsgi_app is not None:
+                return self.wsgi_app(environ, start_response)
+        return self.not_found(start_response)
+
+    def not_found(self, start_response):
+        start_response("404 Not Found", [('Content-Type', 'text/plain')])
+        return [b'Not Found']
+
+
+class Middleware(WSGIApp):
+    """This class has been renamed to ``WSGIApp`` and is now deprecated."""
+    def __init__(self, engineio_app, wsgi_app=None,
+                 engineio_path='engine.io'):
+        super().__init__(engineio_app, wsgi_app, engineio_path=engineio_path)

venv/lib/python3.11/site-packages/engineio/packet.py

@@ -0,0 +1,74 @@
+import base64
+from engineio import json as _json
+
+(OPEN, CLOSE, PING, PONG, MESSAGE, UPGRADE, NOOP) = (0, 1, 2, 3, 4, 5, 6)
+packet_names = ['OPEN', 'CLOSE', 'PING', 'PONG', 'MESSAGE', 'UPGRADE', 'NOOP']
+
+binary_types = (bytes, bytearray)
+
+
+class Packet(object):
+    """Engine.IO packet."""
+
+    json = _json
+
+    def __init__(self, packet_type=NOOP, data=None, encoded_packet=None):
+        self.packet_type = packet_type
+        self.data = data
+        if isinstance(data, str):
+            self.binary = False
+        elif isinstance(data, binary_types):
+            self.binary = True
+        else:
+            self.binary = False
+        if self.binary and self.packet_type != MESSAGE:
+            raise ValueError('Binary packets can only be of type MESSAGE')
+        if encoded_packet is not None:
+            self.decode(encoded_packet)
+
+    def encode(self, b64=False):
+        """Encode the packet for transmission."""
+        if self.binary:
+            if b64:
+                encoded_packet = 'b' + base64.b64encode(self.data).decode(
+                    'utf-8')
+            else:
+                encoded_packet = self.data
+        else:
+            encoded_packet = str(self.packet_type)
+            if isinstance(self.data, str):
+                encoded_packet += self.data
+            elif isinstance(self.data, dict) or isinstance(self.data, list):
+                encoded_packet += self.json.dumps(self.data,
+                                                  separators=(',', ':'))
+            elif self.data is not None:
+                encoded_packet += str(self.data)
+        return encoded_packet
+
+    def decode(self, encoded_packet):
+        """Decode a transmitted package."""
+        self.binary = isinstance(encoded_packet, binary_types)
+        if not self.binary and len(encoded_packet) == 0:
+            raise ValueError('Invalid empty packet received')
+        b64 = not self.binary and encoded_packet[0] == 'b'
+        if b64:
+            self.binary = True
+            self.packet_type = MESSAGE
+            self.data = base64.b64decode(encoded_packet[1:])
+        else:
+            if self.binary and not isinstance(encoded_packet, bytes):
+                encoded_packet = bytes(encoded_packet)
+            if self.binary:
+                self.packet_type = MESSAGE
+                self.data = encoded_packet
+            else:
+                self.packet_type = int(encoded_packet[0])
+                try:
+                    self.data = self.json.loads(encoded_packet[1:])
+                    if isinstance(self.data, int):
+                        # do not allow integer payloads, see
+                        # github.com/miguelgrinberg/python-engineio/issues/75
+                        # for background on this decision
+                        raise ValueError
+                except ValueError:
+                    self.data = encoded_packet[1:]

venv/lib/python3.11/site-packages/engineio/payload.py

@@ -0,0 +1,46 @@
+import urllib
+
+from . import packet
+
+
+class Payload(object):
+    """Engine.IO payload."""
+    max_decode_packets = 16
+
+    def __init__(self, packets=None, encoded_payload=None):
+        self.packets = packets or []
+        if encoded_payload is not None:
+            self.decode(encoded_payload)
+
+    def encode(self, jsonp_index=None):
+        """Encode the payload for transmission."""
+        encoded_payload = ''
+        for pkt in self.packets:
+            if encoded_payload:
+                encoded_payload += '\x1e'
+            encoded_payload += pkt.encode(b64=True)
+        if jsonp_index is not None:
+            encoded_payload = '___eio[' + \
+                              str(jsonp_index) + \
+                              ']("' + \
+                              encoded_payload.replace('"', '\\"') + \
+                              '");'
+        return encoded_payload
+
+    def decode(self, encoded_payload):
+        """Decode a transmitted payload."""
+        self.packets = []
+
+        if len(encoded_payload) == 0:
+            return
+
+        # JSONP POST payload starts with 'd='
+        if encoded_payload.startswith('d='):
+            encoded_payload = urllib.parse.parse_qs(
+                encoded_payload)['d'][0]
+
+        encoded_packets = encoded_payload.split('\x1e')
+        if len(encoded_packets) > self.max_decode_packets:
+            raise ValueError('Too many packets in payload')
+        self.packets = [packet.Packet(encoded_packet=encoded_packet)
+                        for encoded_packet in encoded_packets]

venv/lib/python3.11/site-packages/engineio/server.py

@@ -0,0 +1,770 @@
+import base64
+import gzip
+import importlib
+import io
+import logging
+import secrets
+import urllib
+import zlib
+
+from . import exceptions
+from . import packet
+from . import payload
+from . import socket
+
+default_logger = logging.getLogger('engineio.server')
+
+
+class Server(object):
+    """An Engine.IO server.
+
+    This class implements a fully compliant Engine.IO web server with support
+    for websocket and long-polling transports.
+
+    :param async_mode: The asynchronous model to use. See the Deployment
+                       section in the documentation for a description of the
+                       available options. Valid async modes are "threading",
+                       "eventlet", "gevent" and "gevent_uwsgi". If this
+                       argument is not given, "eventlet" is tried first, then
+                       "gevent_uwsgi", then "gevent", and finally "threading".
+                       The first async mode that has all its dependencies
+                       installed is the one that is chosen.
+    :param ping_interval: The interval in seconds at which the server pings
+                          the client. The default is 25 seconds. For advanced
+                          control, a two element tuple can be given, where
+                          the first number is the ping interval and the second
+                          is a grace period added by the server.
+    :param ping_timeout: The time in seconds that the client waits for the
+                         server to respond before disconnecting. The default
+                         is 20 seconds.
+    :param max_http_buffer_size: The maximum size of a message.  The default
+                                 is 1,000,000 bytes.
+    :param allow_upgrades: Whether to allow transport upgrades or not. The
+                           default is ``True``.
+    :param http_compression: Whether to compress packages when using the
+                             polling transport. The default is ``True``.
+    :param compression_threshold: Only compress messages when their byte size
+                                  is greater than this value. The default is
+                                  1024 bytes.
+    :param cookie: If set to a string, it is the name of the HTTP cookie the
+                   server sends back tot he client containing the client
+                   session id. If set to a dictionary, the ``'name'`` key
+                   contains the cookie name and other keys define cookie
+                   attributes, where the value of each attribute can be a
+                   string, a callable with no arguments, or a boolean. If set
+                   to ``None`` (the default), a cookie is not sent to the
+                   client.
+    :param cors_allowed_origins: Origin or list of origins that are allowed to
+                                 connect to this server. Only the same origin
+                                 is allowed by default. Set this argument to
+                                 ``'*'`` to allow all origins, or to ``[]`` to
+                                 disable CORS handling.
+    :param cors_credentials: Whether credentials (cookies, authentication) are
+                             allowed in requests to this server. The default
+                             is ``True``.
+    :param logger: To enable logging set to ``True`` or pass a logger object to
+                   use. To disable logging set to ``False``. The default is
+                   ``False``. Note that fatal errors are logged even when
+                   ``logger`` is ``False``.
+    :param json: An alternative json module to use for encoding and decoding
+                 packets. Custom json modules must have ``dumps`` and ``loads``
+                 functions that are compatible with the standard library
+                 versions.
+    :param async_handlers: If set to ``True``, run message event handlers in
+                           non-blocking threads. To run handlers synchronously,
+                           set to ``False``. The default is ``True``.
+    :param monitor_clients: If set to ``True``, a background task will ensure
+                            inactive clients are closed. Set to ``False`` to
+                            disable the monitoring task (not recommended). The
+                            default is ``True``.
+    :param transports: The list of allowed transports. Valid transports
+                       are ``'polling'`` and ``'websocket'``. Defaults to
+                       ``['polling', 'websocket']``.
+    :param kwargs: Reserved for future extensions, any additional parameters
+                   given as keyword arguments will be silently ignored.
+    """
+    compression_methods = ['gzip', 'deflate']
+    event_names = ['connect', 'disconnect', 'message']
+    valid_transports = ['polling', 'websocket']
+    _default_monitor_clients = True
+    sequence_number = 0
+
+    def __init__(self, async_mode=None, ping_interval=25, ping_timeout=20,
+                 max_http_buffer_size=1000000, allow_upgrades=True,
+                 http_compression=True, compression_threshold=1024,
+                 cookie=None, cors_allowed_origins=None,
+                 cors_credentials=True, logger=False, json=None,
+                 async_handlers=True, monitor_clients=None, transports=None,
+                 **kwargs):
+        self.ping_timeout = ping_timeout
+        if isinstance(ping_interval, tuple):
+            self.ping_interval = ping_interval[0]
+            self.ping_interval_grace_period = ping_interval[1]
+        else:
+            self.ping_interval = ping_interval
+            self.ping_interval_grace_period = 0
+        self.max_http_buffer_size = max_http_buffer_size
+        self.allow_upgrades = allow_upgrades
+        self.http_compression = http_compression
+        self.compression_threshold = compression_threshold
+        self.cookie = cookie
+        self.cors_allowed_origins = cors_allowed_origins
+        self.cors_credentials = cors_credentials
+        self.async_handlers = async_handlers
+        self.sockets = {}
+        self.handlers = {}
+        self.log_message_keys = set()
+        self.start_service_task = monitor_clients \
+            if monitor_clients is not None else self._default_monitor_clients
+        if json is not None:
+            packet.Packet.json = json
+        if not isinstance(logger, bool):
+            self.logger = logger
+        else:
+            self.logger = default_logger
+            if self.logger.level == logging.NOTSET:
+                if logger:
+                    self.logger.setLevel(logging.INFO)
+                else:
+                    self.logger.setLevel(logging.ERROR)
+                self.logger.addHandler(logging.StreamHandler())
+        modes = self.async_modes()
+        if async_mode is not None:
+            modes = [async_mode] if async_mode in modes else []
+        self._async = None
+        self.async_mode = None
+        for mode in modes:
+            try:
+                self._async = importlib.import_module(
+                    'engineio.async_drivers.' + mode)._async
+                asyncio_based = self._async['asyncio'] \
+                    if 'asyncio' in self._async else False
+                if asyncio_based != self.is_asyncio_based():
+                    continue  # pragma: no cover
+                self.async_mode = mode
+                break
+            except ImportError:
+                pass
+        if self.async_mode is None:
+            raise ValueError('Invalid async_mode specified')
+        if self.is_asyncio_based() and \
+                ('asyncio' not in self._async or not
+                 self._async['asyncio']):  # pragma: no cover
+            raise ValueError('The selected async_mode is not asyncio '
+                             'compatible')
+        if not self.is_asyncio_based() and 'asyncio' in self._async and \
+                self._async['asyncio']:  # pragma: no cover
+            raise ValueError('The selected async_mode requires asyncio and '
+                             'must use the AsyncServer class')
+        if transports is not None:
+            if isinstance(transports, str):
+                transports = [transports]
+            transports = [transport for transport in transports
+                          if transport in self.valid_transports]
+            if not transports:
+                raise ValueError('No valid transports provided')
+        self.transports = transports or self.valid_transports
+        self.logger.info('Server initialized for %s.', self.async_mode)
+
+    def is_asyncio_based(self):
+        return False
+
+    def async_modes(self):
+        return ['eventlet', 'gevent_uwsgi', 'gevent', 'threading']
+
+    def on(self, event, handler=None):
+        """Register an event handler.
+
+        :param event: The event name. Can be ``'connect'``, ``'message'`` or
+                      ``'disconnect'``.
+        :param handler: The function that should be invoked to handle the
+                        event. When this parameter is not given, the method
+                        acts as a decorator for the handler function.
+
+        Example usage::
+
+            # as a decorator:
+            @eio.on('connect')
+            def connect_handler(sid, environ):
+                print('Connection request')
+                if environ['REMOTE_ADDR'] in blacklisted:
+                    return False  # reject
+
+            # as a method:
+            def message_handler(sid, msg):
+                print('Received message: ', msg)
+                eio.send(sid, 'response')
+            eio.on('message', message_handler)
+
+        The handler function receives the ``sid`` (session ID) for the
+        client as first argument. The ``'connect'`` event handler receives the
+        WSGI environment as a second argument, and can return ``False`` to
+        reject the connection. The ``'message'`` handler receives the message
+        payload as a second argument. The ``'disconnect'`` handler does not
+        take a second argument.
+        """
+        if event not in self.event_names:
+            raise ValueError('Invalid event')
+
+        def set_handler(handler):
+            self.handlers[event] = handler
+            return handler
+
+        if handler is None:
+            return set_handler
+        set_handler(handler)
+
+    def send(self, sid, data):
+        """Send a message to a client.
+
+        :param sid: The session id of the recipient client.
+        :param data: The data to send to the client. Data can be of type
+                     ``str``, ``bytes``, ``list`` or ``dict``. If a ``list``
+                     or ``dict``, the data will be serialized as JSON.
+        """
+        try:
+            socket = self._get_socket(sid)
+        except KeyError:
+            # the socket is not available
+            self.logger.warning('Cannot send to sid %s', sid)
+            return
+        socket.send(packet.Packet(packet.MESSAGE, data=data))
+
+    def get_session(self, sid):
+        """Return the user session for a client.
+
+        :param sid: The session id of the client.
+
+        The return value is a dictionary. Modifications made to this
+        dictionary are not guaranteed to be preserved unless
+        ``save_session()`` is called, or when the ``session`` context manager
+        is used.
+        """
+        socket = self._get_socket(sid)
+        return socket.session
+
+    def save_session(self, sid, session):
+        """Store the user session for a client.
+
+        :param sid: The session id of the client.
+        :param session: The session dictionary.
+        """
+        socket = self._get_socket(sid)
+        socket.session = session
+
+    def session(self, sid):
+        """Return the user session for a client with context manager syntax.
+
+        :param sid: The session id of the client.
+
+        This is a context manager that returns the user session dictionary for
+        the client. Any changes that are made to this dictionary inside the
+        context manager block are saved back to the session. Example usage::
+
+            @eio.on('connect')
+            def on_connect(sid, environ):
+                username = authenticate_user(environ)
+                if not username:
+                    return False
+                with eio.session(sid) as session:
+                    session['username'] = username
+
+            @eio.on('message')
+            def on_message(sid, msg):
+                with eio.session(sid) as session:
+                    print('received message from ', session['username'])
+        """
+        class _session_context_manager(object):
+            def __init__(self, server, sid):
+                self.server = server
+                self.sid = sid
+                self.session = None
+
+            def __enter__(self):
+                self.session = self.server.get_session(sid)
+                return self.session
+
+            def __exit__(self, *args):
+                self.server.save_session(sid, self.session)
+
+        return _session_context_manager(self, sid)
+
+    def disconnect(self, sid=None):
+        """Disconnect a client.
+
+        :param sid: The session id of the client to close. If this parameter
+                    is not given, then all clients are closed.
+        """
+        if sid is not None:
+            try:
+                socket = self._get_socket(sid)
+            except KeyError:  # pragma: no cover
+                # the socket was already closed or gone
+                pass
+            else:
+                socket.close()
+                if sid in self.sockets:  # pragma: no cover
+                    del self.sockets[sid]
+        else:
+            for client in self.sockets.values():
+                client.close()
+            self.sockets = {}
+
+    def transport(self, sid):
+        """Return the name of the transport used by the client.
+
+        The two possible values returned by this function are ``'polling'``
+        and ``'websocket'``.
+
+        :param sid: The session of the client.
+        """
+        return 'websocket' if self._get_socket(sid).upgraded else 'polling'
+
+    def handle_request(self, environ, start_response):
+        """Handle an HTTP request from the client.
+
+        This is the entry point of the Engine.IO application, using the same
+        interface as a WSGI application. For the typical usage, this function
+        is invoked by the :class:`Middleware` instance, but it can be invoked
+        directly when the middleware is not used.
+
+        :param environ: The WSGI environment.
+        :param start_response: The WSGI ``start_response`` function.
+
+        This function returns the HTTP response body to deliver to the client
+        as a byte sequence.
+        """
+        if self.cors_allowed_origins != []:
+            # Validate the origin header if present
+            # This is important for WebSocket more than for HTTP, since
+            # browsers only apply CORS controls to HTTP.
+            origin = environ.get('HTTP_ORIGIN')
+            if origin:
+                allowed_origins = self._cors_allowed_origins(environ)
+                if allowed_origins is not None and origin not in \
+                        allowed_origins:
+                    self._log_error_once(
+                        origin + ' is not an accepted origin.', 'bad-origin')
+                    r = self._bad_request('Not an accepted origin.')
+                    start_response(r['status'], r['headers'])
+                    return [r['response']]
+
+        method = environ['REQUEST_METHOD']
+        query = urllib.parse.parse_qs(environ.get('QUERY_STRING', ''))
+        jsonp = False
+        jsonp_index = None
+
+        # make sure the client uses an allowed transport
+        transport = query.get('transport', ['polling'])[0]
+        if transport not in self.transports:
+            self._log_error_once('Invalid transport', 'bad-transport')
+            r = self._bad_request('Invalid transport')
+            start_response(r['status'], r['headers'])
+            return [r['response']]
+
+        # make sure the client speaks a compatible Engine.IO version
+        sid = query['sid'][0] if 'sid' in query else None
+        if sid is None and query.get('EIO') != ['4']:
+            self._log_error_once(
+                'The client is using an unsupported version of the Socket.IO '
+                'or Engine.IO protocols', 'bad-version')
+            r = self._bad_request(
+                'The client is using an unsupported version of the Socket.IO '
+                'or Engine.IO protocols')
+            start_response(r['status'], r['headers'])
+            return [r['response']]
+
+        if 'j' in query:
+            jsonp = True
+            try:
+                jsonp_index = int(query['j'][0])
+            except (ValueError, KeyError, IndexError):
+                # Invalid JSONP index number
+                pass
+
+        if jsonp and jsonp_index is None:
+            self._log_error_once('Invalid JSONP index number',
+                                 'bad-jsonp-index')
+            r = self._bad_request('Invalid JSONP index number')
+        elif method == 'GET':
+            if sid is None:
+                # transport must be one of 'polling' or 'websocket'.
+                # if 'websocket', the HTTP_UPGRADE header must match.
+                upgrade_header = environ.get('HTTP_UPGRADE').lower() \
+                    if 'HTTP_UPGRADE' in environ else None
+                if transport == 'polling' \
+                        or transport == upgrade_header == 'websocket':
+                    r = self._handle_connect(environ, start_response,
+                                             transport, jsonp_index)
+                else:
+                    self._log_error_once('Invalid websocket upgrade',
+                                         'bad-upgrade')
+                    r = self._bad_request('Invalid websocket upgrade')
+            else:
+                if sid not in self.sockets:
+                    self._log_error_once('Invalid session ' + sid, 'bad-sid')
+                    r = self._bad_request('Invalid session')
+                else:
+                    socket = self._get_socket(sid)
+                    try:
+                        packets = socket.handle_get_request(
+                            environ, start_response)
+                        if isinstance(packets, list):
+                            r = self._ok(packets, jsonp_index=jsonp_index)
+                        else:
+                            r = packets
+                    except exceptions.EngineIOError:
+                        if sid in self.sockets:  # pragma: no cover
+                            self.disconnect(sid)
+                        r = self._bad_request()
+                    if sid in self.sockets and self.sockets[sid].closed:
+                        del self.sockets[sid]
+        elif method == 'POST':
+            if sid is None or sid not in self.sockets:
+                self._log_error_once(
+                    'Invalid session ' + (sid or 'None'), 'bad-sid')
+                r = self._bad_request('Invalid session')
+            else:
+                socket = self._get_socket(sid)
+                try:
+                    socket.handle_post_request(environ)
+                    r = self._ok(jsonp_index=jsonp_index)
+                except exceptions.EngineIOError:
+                    if sid in self.sockets:  # pragma: no cover
+                        self.disconnect(sid)
+                    r = self._bad_request()
+                except:  # pragma: no cover
+                    # for any other unexpected errors, we log the error
+                    # and keep going
+                    self.logger.exception('post request handler error')
+                    r = self._ok(jsonp_index=jsonp_index)
+        elif method == 'OPTIONS':
+            r = self._ok()
+        else:
+            self.logger.warning('Method %s not supported', method)
+            r = self._method_not_found()
+
+        if not isinstance(r, dict):
+            return r or []
+        if self.http_compression and \
+                len(r['response']) >= self.compression_threshold:
+            encodings = [e.split(';')[0].strip() for e in
+                         environ.get('HTTP_ACCEPT_ENCODING', '').split(',')]
+            for encoding in encodings:
+                if encoding in self.compression_methods:
+                    r['response'] = \
+                        getattr(self, '_' + encoding)(r['response'])
+                    r['headers'] += [('Content-Encoding', encoding)]
+                    break
+        cors_headers = self._cors_headers(environ)
+        start_response(r['status'], r['headers'] + cors_headers)
+        return [r['response']]
+
+    def start_background_task(self, target, *args, **kwargs):
+        """Start a background task using the appropriate async model.
+
+        This is a utility function that applications can use to start a
+        background task using the method that is compatible with the
+        selected async mode.
+
+        :param target: the target function to execute.
+        :param args: arguments to pass to the function.
+        :param kwargs: keyword arguments to pass to the function.
+
+        This function returns an object that represents the background task,
+        on which the ``join()`` methond can be invoked to wait for the task to
+        complete.
+        """
+        th = self._async['thread'](target=target, args=args, kwargs=kwargs)
+        th.start()
+        return th  # pragma: no cover
+
+    def sleep(self, seconds=0):
+        """Sleep for the requested amount of time using the appropriate async
+        model.
+
+        This is a utility function that applications can use to put a task to
+        sleep without having to worry about using the correct call for the
+        selected async mode.
+        """
+        return self._async['sleep'](seconds)
+
+    def create_queue(self, *args, **kwargs):
+        """Create a queue object using the appropriate async model.
+
+        This is a utility function that applications can use to create a queue
+        without having to worry about using the correct call for the selected
+        async mode.
+        """
+        return self._async['queue'](*args, **kwargs)
+
+    def get_queue_empty_exception(self):
+        """Return the queue empty exception for the appropriate async model.
+
+        This is a utility function that applications can use to work with a
+        queue without having to worry about using the correct call for the
+        selected async mode.
+        """
+        return self._async['queue_empty']
+
+    def create_event(self, *args, **kwargs):
+        """Create an event object using the appropriate async model.
+
+        This is a utility function that applications can use to create an
+        event without having to worry about using the correct call for the
+        selected async mode.
+        """
+        return self._async['event'](*args, **kwargs)
+
+    def generate_id(self):
+        """Generate a unique session id."""
+        id = base64.b64encode(
+            secrets.token_bytes(12) + self.sequence_number.to_bytes(3, 'big'))
+        self.sequence_number = (self.sequence_number + 1) & 0xffffff
+        return id.decode('utf-8').replace('/', '_').replace('+', '-')
+
+    def _generate_sid_cookie(self, sid, attributes):
+        """Generate the sid cookie."""
+        cookie = attributes.get('name', 'io') + '=' + sid
+        for attribute, value in attributes.items():
+            if attribute == 'name':
+                continue
+            if callable(value):
+                value = value()
+            if value is True:
+                cookie += '; ' + attribute
+            else:
+                cookie += '; ' + attribute + '=' + value
+        return cookie
+
+    def _handle_connect(self, environ, start_response, transport,
+                        jsonp_index=None):
+        """Handle a client connection request."""
+        if self.start_service_task:
+            # start the service task to monitor connected clients
+            self.start_service_task = False
+            self.start_background_task(self._service_task)
+
+        sid = self.generate_id()
+        s = socket.Socket(self, sid)
+        self.sockets[sid] = s
+
+        pkt = packet.Packet(packet.OPEN, {
+            'sid': sid,
+            'upgrades': self._upgrades(sid, transport),
+            'pingTimeout': int(self.ping_timeout * 1000),
+            'pingInterval': int(
+                self.ping_interval + self.ping_interval_grace_period) * 1000})
+        s.send(pkt)
+        s.schedule_ping()
+
+        # NOTE: some sections below are marked as "no cover" to workaround
+        # what seems to be a bug in the coverage package. All the lines below
+        # are covered by tests, but some are not reported as such for some
+        # reason
+        ret = self._trigger_event('connect', sid, environ, run_async=False)
+        if ret is not None and ret is not True:  # pragma: no cover
+            del self.sockets[sid]
+            self.logger.warning('Application rejected connection')
+            return self._unauthorized(ret or None)
+
+        if transport == 'websocket':  # pragma: no cover
+            ret = s.handle_get_request(environ, start_response)
+            if s.closed and sid in self.sockets:
+                # websocket connection ended, so we are done
+                del self.sockets[sid]
+            return ret
+        else:  # pragma: no cover
+            s.connected = True
+            headers = None
+            if self.cookie:
+                if isinstance(self.cookie, dict):
+                    headers = [(
+                        'Set-Cookie',
+                        self._generate_sid_cookie(sid, self.cookie)
+                    )]
+                else:
+                    headers = [(
+                        'Set-Cookie',
+                        self._generate_sid_cookie(sid, {
+                            'name': self.cookie, 'path': '/', 'SameSite': 'Lax'
+                        })
+                    )]
+            try:
+                return self._ok(s.poll(), headers=headers,
+                                jsonp_index=jsonp_index)
+            except exceptions.QueueEmpty:
+                return self._bad_request()
+
+    def _upgrades(self, sid, transport):
+        """Return the list of possible upgrades for a client connection."""
+        if not self.allow_upgrades or self._get_socket(sid).upgraded or \
+                transport == 'websocket':
+            return []
+        if self._async['websocket'] is None:  # pragma: no cover
+            self._log_error_once(
+                'The WebSocket transport is not available, you must install a '
+                'WebSocket server that is compatible with your async mode to '
+                'enable it. See the documentation for details.',
+                'no-websocket')
+            return []
+        return ['websocket']
+
+    def _trigger_event(self, event, *args, **kwargs):
+        """Invoke an event handler."""
+        run_async = kwargs.pop('run_async', False)
+        if event in self.handlers:
+            if run_async:
+                return self.start_background_task(self.handlers[event], *args)
+            else:
+                try:
+                    return self.handlers[event](*args)
+                except:
+                    self.logger.exception(event + ' handler error')
+                    if event == 'connect':
+                        # if connect handler raised error we reject the
+                        # connection
+                        return False
+
+    def _get_socket(self, sid):
+        """Return the socket object for a given session."""
+        try:
+            s = self.sockets[sid]
+        except KeyError:
+            raise KeyError('Session not found')
+        if s.closed:
+            del self.sockets[sid]
+            raise KeyError('Session is disconnected')
+        return s
+
+    def _ok(self, packets=None, headers=None, jsonp_index=None):
+        """Generate a successful HTTP response."""
+        if packets is not None:
+            if headers is None:
+                headers = []
+            headers += [('Content-Type', 'text/plain; charset=UTF-8')]
+            return {'status': '200 OK',
+                    'headers': headers,
+                    'response': payload.Payload(packets=packets).encode(
+                        jsonp_index=jsonp_index).encode('utf-8')}
+        else:
+            return {'status': '200 OK',
+                    'headers': [('Content-Type', 'text/plain')],
+                    'response': b'OK'}
+
+    def _bad_request(self, message=None):
+        """Generate a bad request HTTP error response."""
+        if message is None:
+            message = 'Bad Request'
+        message = packet.Packet.json.dumps(message)
+        return {'status': '400 BAD REQUEST',
+                'headers': [('Content-Type', 'text/plain')],
+                'response': message.encode('utf-8')}
+
+    def _method_not_found(self):
+        """Generate a method not found HTTP error response."""
+        return {'status': '405 METHOD NOT FOUND',
+                'headers': [('Content-Type', 'text/plain')],
+                'response': b'Method Not Found'}
+
+    def _unauthorized(self, message=None):
+        """Generate a unauthorized HTTP error response."""
+        if message is None:
+            message = 'Unauthorized'
+        message = packet.Packet.json.dumps(message)
+        return {'status': '401 UNAUTHORIZED',
+                'headers': [('Content-Type', 'application/json')],
+                'response': message.encode('utf-8')}
+
+    def _cors_allowed_origins(self, environ):
+        default_origins = []
+        if 'wsgi.url_scheme' in environ and 'HTTP_HOST' in environ:
+            default_origins.append('{scheme}://{host}'.format(
+                scheme=environ['wsgi.url_scheme'], host=environ['HTTP_HOST']))
+            if 'HTTP_X_FORWARDED_PROTO' in environ or \
+                    'HTTP_X_FORWARDED_HOST' in environ:
+                scheme = environ.get(
+                    'HTTP_X_FORWARDED_PROTO',
+                    environ['wsgi.url_scheme']).split(',')[0].strip()
+                default_origins.append('{scheme}://{host}'.format(
+                    scheme=scheme, host=environ.get(
+                        'HTTP_X_FORWARDED_HOST', environ['HTTP_HOST']).split(
+                            ',')[0].strip()))
+        if self.cors_allowed_origins is None:
+            allowed_origins = default_origins
+        elif self.cors_allowed_origins == '*':
+            allowed_origins = None
+        elif isinstance(self.cors_allowed_origins, str):
+            allowed_origins = [self.cors_allowed_origins]
+        elif callable(self.cors_allowed_origins):
+            origin = environ.get('HTTP_ORIGIN')
+            allowed_origins = [origin] \
+                if self.cors_allowed_origins(origin) else []
+        else:
+            allowed_origins = self.cors_allowed_origins
+        return allowed_origins
+
+    def _cors_headers(self, environ):
+        """Return the cross-origin-resource-sharing headers."""
+        if self.cors_allowed_origins == []:
+            # special case, CORS handling is completely disabled
+            return []
+        headers = []
+        allowed_origins = self._cors_allowed_origins(environ)
+        if 'HTTP_ORIGIN' in environ and \
+                (allowed_origins is None or environ['HTTP_ORIGIN'] in
+                 allowed_origins):
+            headers = [('Access-Control-Allow-Origin', environ['HTTP_ORIGIN'])]
+        if environ['REQUEST_METHOD'] == 'OPTIONS':
+            headers += [('Access-Control-Allow-Methods', 'OPTIONS, GET, POST')]
+        if 'HTTP_ACCESS_CONTROL_REQUEST_HEADERS' in environ:
+            headers += [('Access-Control-Allow-Headers',
+                        environ['HTTP_ACCESS_CONTROL_REQUEST_HEADERS'])]
+        if self.cors_credentials:
+            headers += [('Access-Control-Allow-Credentials', 'true')]
+        return headers
+
+    def _gzip(self, response):
+        """Apply gzip compression to a response."""
+        bytesio = io.BytesIO()
+        with gzip.GzipFile(fileobj=bytesio, mode='w') as gz:
+            gz.write(response)
+        return bytesio.getvalue()
+
+    def _deflate(self, response):
+        """Apply deflate compression to a response."""
+        return zlib.compress(response)
+
+    def _log_error_once(self, message, message_key):
+        """Log message with logging.ERROR level the first time, then log
+        with given level."""
+        if message_key not in self.log_message_keys:
+            self.logger.error(message + ' (further occurrences of this error '
+                              'will be logged with level INFO)')
+            self.log_message_keys.add(message_key)
+        else:
+            self.logger.info(message)
+
+    def _service_task(self):  # pragma: no cover
+        """Monitor connected clients and clean up those that time out."""
+        while True:
+            if len(self.sockets) == 0:
+                # nothing to do
+                self.sleep(self.ping_timeout)
+                continue
+
+            # go through the entire client list in a ping interval cycle
+            sleep_interval = float(self.ping_timeout) / len(self.sockets)
+
+            try:
+                # iterate over the current clients
+                for s in self.sockets.copy().values():
+                    if not s.closing and not s.closed:
+                        s.check_ping_timeout()
+                    self.sleep(sleep_interval)
+            except (SystemExit, KeyboardInterrupt):
+                self.logger.info('service task canceled')
+                break
+            except:
+                # an unexpected exception has occurred, log it and continue
+                self.logger.exception('service task exception')

venv/lib/python3.11/site-packages/engineio/socket.py

@@ -0,0 +1,261 @@
+import sys
+import time
+
+from . import exceptions
+from . import packet
+from . import payload
+
+
+class Socket(object):
+    """An Engine.IO socket."""
+    upgrade_protocols = ['websocket']
+
+    def __init__(self, server, sid):
+        self.server = server
+        self.sid = sid
+        self.queue = self.server.create_queue()
+        self.last_ping = None
+        self.connected = False
+        self.upgrading = False
+        self.upgraded = False
+        self.closing = False
+        self.closed = False
+        self.session = {}
+
+    def poll(self):
+        """Wait for packets to send to the client."""
+        queue_empty = self.server.get_queue_empty_exception()
+        try:
+            packets = [self.queue.get(
+                timeout=self.server.ping_interval + self.server.ping_timeout)]
+            self.queue.task_done()
+        except queue_empty:
+            raise exceptions.QueueEmpty()
+        if packets == [None]:
+            return []
+        while True:
+            try:
+                pkt = self.queue.get(block=False)
+                self.queue.task_done()
+                if pkt is None:
+                    self.queue.put(None)
+                    break
+                packets.append(pkt)
+            except queue_empty:
+                break
+        return packets
+
+    def receive(self, pkt):
+        """Receive packet from the client."""
+        packet_name = packet.packet_names[pkt.packet_type] \
+            if pkt.packet_type < len(packet.packet_names) else 'UNKNOWN'
+        self.server.logger.info('%s: Received packet %s data %s',
+                                self.sid, packet_name,
+                                pkt.data if not isinstance(pkt.data, bytes)
+                                else '<binary>')
+        if pkt.packet_type == packet.PONG:
+            self.schedule_ping()
+        elif pkt.packet_type == packet.MESSAGE:
+            self.server._trigger_event('message', self.sid, pkt.data,
+                                       run_async=self.server.async_handlers)
+        elif pkt.packet_type == packet.UPGRADE:
+            self.send(packet.Packet(packet.NOOP))
+        elif pkt.packet_type == packet.CLOSE:
+            self.close(wait=False, abort=True)
+        else:
+            raise exceptions.UnknownPacketError()
+
+    def check_ping_timeout(self):
+        """Make sure the client is still responding to pings."""
+        if self.closed:
+            raise exceptions.SocketIsClosedError()
+        if self.last_ping and \
+                time.time() - self.last_ping > self.server.ping_timeout:
+            self.server.logger.info('%s: Client is gone, closing socket',
+                                    self.sid)
+            # Passing abort=False here will cause close() to write a
+            # CLOSE packet. This has the effect of updating half-open sockets
+            # to their correct state of disconnected
+            self.close(wait=False, abort=False)
+            return False
+        return True
+
+    def send(self, pkt):
+        """Send a packet to the client."""
+        if not self.check_ping_timeout():
+            return
+        else:
+            self.queue.put(pkt)
+        self.server.logger.info('%s: Sending packet %s data %s',
+                                self.sid, packet.packet_names[pkt.packet_type],
+                                pkt.data if not isinstance(pkt.data, bytes)
+                                else '<binary>')
+
+    def handle_get_request(self, environ, start_response):
+        """Handle a long-polling GET request from the client."""
+        connections = [
+            s.strip()
+            for s in environ.get('HTTP_CONNECTION', '').lower().split(',')]
+        transport = environ.get('HTTP_UPGRADE', '').lower()
+        if 'upgrade' in connections and transport in self.upgrade_protocols:
+            self.server.logger.info('%s: Received request to upgrade to %s',
+                                    self.sid, transport)
+            return getattr(self, '_upgrade_' + transport)(environ,
+                                                          start_response)
+        if self.upgrading or self.upgraded:
+            # we are upgrading to WebSocket, do not return any more packets
+            # through the polling endpoint
+            return [packet.Packet(packet.NOOP)]
+        try:
+            packets = self.poll()
+        except exceptions.QueueEmpty:
+            exc = sys.exc_info()
+            self.close(wait=False)
+            raise exc[1].with_traceback(exc[2])
+        return packets
+
+    def handle_post_request(self, environ):
+        """Handle a long-polling POST request from the client."""
+        length = int(environ.get('CONTENT_LENGTH', '0'))
+        if length > self.server.max_http_buffer_size:
+            raise exceptions.ContentTooLongError()
+        else:
+            body = environ['wsgi.input'].read(length).decode('utf-8')
+            p = payload.Payload(encoded_payload=body)
+            for pkt in p.packets:
+                self.receive(pkt)
+
+    def close(self, wait=True, abort=False):
+        """Close the socket connection."""
+        if not self.closed and not self.closing:
+            self.closing = True
+            self.server._trigger_event('disconnect', self.sid, run_async=False)
+            if not abort:
+                self.send(packet.Packet(packet.CLOSE))
+            self.closed = True
+            self.queue.put(None)
+            if wait:
+                self.queue.join()
+
+    def schedule_ping(self):
+        def send_ping():
+            self.last_ping = None
+            self.server.sleep(self.server.ping_interval)
+            if not self.closing and not self.closed:
+                self.last_ping = time.time()
+                self.send(packet.Packet(packet.PING))
+
+        self.server.start_background_task(send_ping)
+
+    def _upgrade_websocket(self, environ, start_response):
+        """Upgrade the connection from polling to websocket."""
+        if self.upgraded:
+            raise IOError('Socket has been upgraded already')
+        if self.server._async['websocket'] is None:
+            # the selected async mode does not support websocket
+            return self.server._bad_request()
+        ws = self.server._async['websocket'](
+            self._websocket_handler, self.server)
+        return ws(environ, start_response)
+
+    def _websocket_handler(self, ws):
+        """Engine.IO handler for websocket transport."""
+        def websocket_wait():
+            data = ws.wait()
+            if data and len(data) > self.server.max_http_buffer_size:
+                raise ValueError('packet is too large')
+            return data
+
+        # try to set a socket timeout matching the configured ping interval
+        # and timeout
+        for attr in ['_sock', 'socket']:  # pragma: no cover
+            if hasattr(ws, attr) and hasattr(getattr(ws, attr), 'settimeout'):
+                getattr(ws, attr).settimeout(
+                    self.server.ping_interval + self.server.ping_timeout)
+
+        if self.connected:
+            # the socket was already connected, so this is an upgrade
+            self.upgrading = True  # hold packet sends during the upgrade
+
+            pkt = websocket_wait()
+            decoded_pkt = packet.Packet(encoded_packet=pkt)
+            if decoded_pkt.packet_type != packet.PING or \
+                    decoded_pkt.data != 'probe':
+                self.server.logger.info(
+                    '%s: Failed websocket upgrade, no PING packet', self.sid)
+                self.upgrading = False
+                return []
+            ws.send(packet.Packet(packet.PONG, data='probe').encode())
+            self.queue.put(packet.Packet(packet.NOOP))  # end poll
+
+            pkt = websocket_wait()
+            decoded_pkt = packet.Packet(encoded_packet=pkt)
+            if decoded_pkt.packet_type != packet.UPGRADE:
+                self.upgraded = False
+                self.server.logger.info(
+                    ('%s: Failed websocket upgrade, expected UPGRADE packet, '
+                     'received %s instead.'),
+                    self.sid, pkt)
+                self.upgrading = False
+                return []
+            self.upgraded = True
+            self.upgrading = False
+        else:
+            self.connected = True
+            self.upgraded = True
+
+        # start separate writer thread
+        def writer():
+            while True:
+                packets = None
+                try:
+                    packets = self.poll()
+                except exceptions.QueueEmpty:
+                    break
+                if not packets:
+                    # empty packet list returned -> connection closed
+                    break
+                try:
+                    for pkt in packets:
+                        ws.send(pkt.encode())
+                except:
+                    break
+        writer_task = self.server.start_background_task(writer)
+
+        self.server.logger.info(
+            '%s: Upgrade to websocket successful', self.sid)
+
+        while True:
+            p = None
+            try:
+                p = websocket_wait()
+            except Exception as e:
+                # if the socket is already closed, we can assume this is a
+                # downstream error of that
+                if not self.closed:  # pragma: no cover
+                    self.server.logger.info(
+                        '%s: Unexpected error "%s", closing connection',
+                        self.sid, str(e))
+                break
+            if p is None:
+                # connection closed by client
+                break
+            pkt = packet.Packet(encoded_packet=p)
+            try:
+                self.receive(pkt)
+            except exceptions.UnknownPacketError:  # pragma: no cover
+                pass
+            except exceptions.SocketIsClosedError:  # pragma: no cover
+                self.server.logger.info('Receive error -- socket is closed')
+                break
+            except:  # pragma: no cover
+                # if we get an unexpected exception we log the error and exit
+                # the connection properly
+                self.server.logger.exception('Unknown receive error')
+                break
+
+        self.queue.put(None)  # unlock the writer task so that it can exit
+        writer_task.join()
+        self.close(wait=False, abort=True)
+
+        return []

venv/lib/python3.11/site-packages/engineio/static_files.py

@@ -0,0 +1,60 @@
+content_types = {
+    'css': 'text/css',
+    'gif': 'image/gif',
+    'html': 'text/html',
+    'jpg': 'image/jpeg',
+    'js': 'application/javascript',
+    'json': 'application/json',
+    'png': 'image/png',
+    'txt': 'text/plain',
+}
+
+
+def get_static_file(path, static_files):
+    """Return the local filename and content type for the requested static
+    file URL.
+
+    :param path: the path portion of the requested URL.
+    :param static_files: a static file configuration dictionary.
+
+    This function returns a dictionary with two keys, "filename" and
+    "content_type". If the requested URL does not match any static file, the
+    return value is None.
+    """
+    extra_path = ''
+    if path in static_files:
+        f = static_files[path]
+    else:
+        f = None
+        while path != '':
+            path, last = path.rsplit('/', 1)
+            extra_path = '/' + last + extra_path
+            if path in static_files:
+                f = static_files[path]
+                break
+            elif path + '/' in static_files:
+                f = static_files[path + '/']
+                break
+    if f:
+        if isinstance(f, str):
+            f = {'filename': f}
+        else:
+            f = f.copy()  # in case it is mutated below
+        if f['filename'].endswith('/') and extra_path.startswith('/'):
+            extra_path = extra_path[1:]
+        f['filename'] += extra_path
+        if f['filename'].endswith('/'):
+            if '' in static_files:
+                if isinstance(static_files[''], str):
+                    f['filename'] += static_files['']
+                else:
+                    f['filename'] += static_files['']['filename']
+                    if 'content_type' in static_files['']:
+                        f['content_type'] = static_files['']['content_type']
+            else:
+                f['filename'] += 'index.html'
+        if 'content_type' not in f:
+            ext = f['filename'].rsplit('.')[-1]
+            f['content_type'] = content_types.get(
+                ext, 'application/octet-stream')
+    return f