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, }