221 lines
10 KiB
Python
221 lines
10 KiB
Python
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import uuid
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from socketio import packet
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from socketio.pubsub_manager import PubSubManager
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from werkzeug.test import EnvironBuilder
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class SocketIOTestClient(object):
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"""
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This class is useful for testing a Flask-SocketIO server. It works in a
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similar way to the Flask Test Client, but adapted to the Socket.IO server.
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:param app: The Flask application instance.
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:param socketio: The application's ``SocketIO`` instance.
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:param namespace: The namespace for the client. If not provided, the client
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connects to the server on the global namespace.
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:param query_string: A string with custom query string arguments.
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:param headers: A dictionary with custom HTTP headers.
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:param auth: Optional authentication data, given as a dictionary.
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:param flask_test_client: The instance of the Flask test client
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currently in use. Passing the Flask test
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client is optional, but is necessary if you
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want the Flask user session and any other
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cookies set in HTTP routes accessible from
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Socket.IO events.
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"""
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queue = {}
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acks = {}
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def __init__(self, app, socketio, namespace=None, query_string=None,
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headers=None, auth=None, flask_test_client=None):
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def _mock_send_packet(eio_sid, pkt):
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# make sure the packet can be encoded and decoded
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epkt = pkt.encode()
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if not isinstance(epkt, list):
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pkt = packet.Packet(encoded_packet=epkt)
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else:
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pkt = packet.Packet(encoded_packet=epkt[0])
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for att in epkt[1:]:
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pkt.add_attachment(att)
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if pkt.packet_type == packet.EVENT or \
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pkt.packet_type == packet.BINARY_EVENT:
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if eio_sid not in self.queue:
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self.queue[eio_sid] = []
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if pkt.data[0] == 'message' or pkt.data[0] == 'json':
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self.queue[eio_sid].append({
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'name': pkt.data[0],
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'args': pkt.data[1],
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'namespace': pkt.namespace or '/'})
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else:
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self.queue[eio_sid].append({
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'name': pkt.data[0],
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'args': pkt.data[1:],
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'namespace': pkt.namespace or '/'})
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elif pkt.packet_type == packet.ACK or \
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pkt.packet_type == packet.BINARY_ACK:
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self.acks[eio_sid] = {'args': pkt.data,
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'namespace': pkt.namespace or '/'}
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elif pkt.packet_type in [packet.DISCONNECT, packet.CONNECT_ERROR]:
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self.connected[pkt.namespace or '/'] = False
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self.app = app
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self.flask_test_client = flask_test_client
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self.eio_sid = uuid.uuid4().hex
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self.acks[self.eio_sid] = None
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self.queue[self.eio_sid] = []
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self.callback_counter = 0
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self.socketio = socketio
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self.connected = {}
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socketio.server._send_packet = _mock_send_packet
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socketio.server.environ[self.eio_sid] = {}
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socketio.server.async_handlers = False # easier to test when
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socketio.server.eio.async_handlers = False # events are sync
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if isinstance(socketio.server.manager, PubSubManager):
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raise RuntimeError('Test client cannot be used with a message '
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'queue. Disable the queue on your test '
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'configuration.')
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socketio.server.manager.initialize()
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self.connect(namespace=namespace, query_string=query_string,
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headers=headers, auth=auth)
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def is_connected(self, namespace=None):
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"""Check if a namespace is connected.
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:param namespace: The namespace to check. The global namespace is
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assumed if this argument is not provided.
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"""
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return self.connected.get(namespace or '/', False)
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def connect(self, namespace=None, query_string=None, headers=None,
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auth=None):
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"""Connect the client.
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:param namespace: The namespace for the client. If not provided, the
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client connects to the server on the global
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namespace.
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:param query_string: A string with custom query string arguments.
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:param headers: A dictionary with custom HTTP headers.
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:param auth: Optional authentication data, given as a dictionary.
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Note that it is usually not necessary to explicitly call this method,
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since a connection is automatically established when an instance of
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this class is created. An example where it this method would be useful
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is when the application accepts multiple namespace connections.
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"""
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url = '/socket.io'
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namespace = namespace or '/'
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if query_string:
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if query_string[0] != '?':
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query_string = '?' + query_string
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url += query_string
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environ = EnvironBuilder(url, headers=headers).get_environ()
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environ['flask.app'] = self.app
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if self.flask_test_client:
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# inject cookies from Flask
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self.flask_test_client.cookie_jar.inject_wsgi(environ)
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self.socketio.server._handle_eio_connect(self.eio_sid, environ)
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pkt = packet.Packet(packet.CONNECT, auth, namespace=namespace)
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with self.app.app_context():
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self.socketio.server._handle_eio_message(self.eio_sid,
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pkt.encode())
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sid = self.socketio.server.manager.sid_from_eio_sid(self.eio_sid,
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namespace)
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if sid:
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self.connected[namespace] = True
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def disconnect(self, namespace=None):
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"""Disconnect the client.
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:param namespace: The namespace to disconnect. The global namespace is
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assumed if this argument is not provided.
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"""
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if not self.is_connected(namespace):
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raise RuntimeError('not connected')
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pkt = packet.Packet(packet.DISCONNECT, namespace=namespace)
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with self.app.app_context():
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self.socketio.server._handle_eio_message(self.eio_sid,
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pkt.encode())
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del self.connected[namespace or '/']
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def emit(self, event, *args, **kwargs):
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"""Emit an event to the server.
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:param event: The event name.
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:param *args: The event arguments.
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:param callback: ``True`` if the client requests a callback, ``False``
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if not. Note that client-side callbacks are not
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implemented, a callback request will just tell the
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server to provide the arguments to invoke the
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callback, but no callback is invoked. Instead, the
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arguments that the server provided for the callback
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are returned by this function.
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:param namespace: The namespace of the event. The global namespace is
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assumed if this argument is not provided.
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"""
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namespace = kwargs.pop('namespace', None)
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if not self.is_connected(namespace):
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raise RuntimeError('not connected')
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callback = kwargs.pop('callback', False)
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id = None
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if callback:
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self.callback_counter += 1
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id = self.callback_counter
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pkt = packet.Packet(packet.EVENT, data=[event] + list(args),
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namespace=namespace, id=id)
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with self.app.app_context():
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encoded_pkt = pkt.encode()
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if isinstance(encoded_pkt, list):
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for epkt in encoded_pkt:
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self.socketio.server._handle_eio_message(self.eio_sid,
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epkt)
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else:
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self.socketio.server._handle_eio_message(self.eio_sid,
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encoded_pkt)
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ack = self.acks.pop(self.eio_sid, None)
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if ack is not None:
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return ack['args'][0] if len(ack['args']) == 1 \
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else ack['args']
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def send(self, data, json=False, callback=False, namespace=None):
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"""Send a text or JSON message to the server.
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:param data: A string, dictionary or list to send to the server.
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:param json: ``True`` to send a JSON message, ``False`` to send a text
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message.
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:param callback: ``True`` if the client requests a callback, ``False``
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if not. Note that client-side callbacks are not
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implemented, a callback request will just tell the
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server to provide the arguments to invoke the
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callback, but no callback is invoked. Instead, the
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arguments that the server provided for the callback
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are returned by this function.
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:param namespace: The namespace of the event. The global namespace is
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assumed if this argument is not provided.
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"""
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if json:
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msg = 'json'
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else:
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msg = 'message'
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return self.emit(msg, data, callback=callback, namespace=namespace)
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def get_received(self, namespace=None):
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"""Return the list of messages received from the server.
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Since this is not a real client, any time the server emits an event,
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the event is simply stored. The test code can invoke this method to
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obtain the list of events that were received since the last call.
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:param namespace: The namespace to get events from. The global
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namespace is assumed if this argument is not
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provided.
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"""
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if not self.is_connected(namespace):
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raise RuntimeError('not connected')
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namespace = namespace or '/'
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r = [pkt for pkt in self.queue[self.eio_sid]
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if pkt['namespace'] == namespace]
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self.queue[self.eio_sid] = [
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pkt for pkt in self.queue[self.eio_sid] if pkt not in r]
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return r
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