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import asyncio
import sys
from urllib.parse import urlsplit
from aiohttp.web import Response, WebSocketResponse
import six
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):
self.handler = handler
self._sock = None
async def __call__(self, environ):
request = environ['aiohttp.request']
self._sock = WebSocketResponse()
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, six.binary_type) and \
not isinstance(msg.data, six.text_type):
raise IOError()
return msg.data
_async = {
'asyncio': True,
'create_route': create_route,
'translate_request': translate_request,
'make_response': make_response,
'websocket': sys.modules[__name__],
'websocket_class': 'WebSocket'
}
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