How to forward a websocket server in localhost with ngrok
Question: I' trying to run a websocket server on local host and forward it to web using
ngrok. But couldn't figure it how. These are the original code's from
AutobahnPython git repository <https://github.com/tavendo/AutobahnPython>.

Server code:

    
    
    from autobahn.twisted.websocket import WebSocketServerProtocol, \
                                           WebSocketServerFactory
    
    
    class MyServerProtocol(WebSocketServerProtocol):
    
       def onConnect(self, request):
          print("Client connecting: {0}".format(request.peer))
    
       def onOpen(self):
          print("WebSocket connection open.")
    
       def onMessage(self, payload, isBinary):
          if isBinary:
             print("Binary message received: {0} bytes".format(len(payload)))
          else:
             print("Text message received: {0}".format(payload.decode('utf8')))
    
          ## echo back message verbatim
          self.sendMessage(payload, isBinary)
    
       def onClose(self, wasClean, code, reason):
          print("WebSocket connection closed: {0}".format(reason))
    
    
    
    if __name__ == '__main__':
    
       import sys
    
       from twisted.python import log
       from twisted.internet import reactor
    
       log.startLogging(sys.stdout)
    
       factory = WebSocketServerFactory("ws://localhost:9000", debug = False)
       factory.protocol = MyServerProtocol
    
       reactor.listenTCP(9000, factory)
       reactor.run()
    

Client Code:

    
    
    from autobahn.twisted.websocket import WebSocketClientProtocol, \
                                           WebSocketClientFactory
    
    
    
    class MyClientProtocol(WebSocketClientProtocol):
    
       def onConnect(self, response):
          print("Server connected: {0}".format(response.peer))
    
       def onOpen(self):
          print("WebSocket connection open.")
    
          def hello():
             self.sendMessage(u"Hello, world!".encode('utf8'))
             self.sendMessage(b"\x00\x01\x03\x04", isBinary = True)
             self.factory.reactor.callLater(1, hello)
    
          ## start sending messages every second ..
          hello()
    
       def onMessage(self, payload, isBinary):
          if isBinary:
             print("Binary message received: {0} bytes".format(len(payload)))
          else:
             print("Text message received: {0}".format(payload.decode('utf8')))
    
       def onClose(self, wasClean, code, reason):
          print("WebSocket connection closed: {0}".format(reason))
    
    
    
    if __name__ == '__main__':
    
       import sys
    
       from twisted.python import log
       from twisted.internet import reactor
    
       log.startLogging(sys.stdout)
    
       factory = WebSocketClientFactory("ws://localhost:9000", debug = False)
       factory.protocol = MyClientProtocol
    
       reactor.connectTCP("127.0.0.1", 9000, factory)
       reactor.run()
    

This is the changed code:

    
    
    from autobahn.twisted.websocket import WebSocketClientProtocol, \
                                           WebSocketClientFactory
    
    
    
    class MyClientProtocol(WebSocketClientProtocol):
    
       def onConnect(self, response):
          print("Server connected: {0}".format(response.peer))
    
       def onOpen(self):
          print("WebSocket connection open.")
    
          def hello():
             self.sendMessage(u"Hello, world!".encode('utf8'))
             self.sendMessage(b"\x00\x01\x03\x04", isBinary = True)
             self.factory.reactor.callLater(1, hello)
    
          ## start sending messages every second ..
          hello()
    
       def onMessage(self, payload, isBinary):
          if isBinary:
             print("Binary message received: {0} bytes".format(len(payload)))
          else:
             print("Text message received: {0}".format(payload.decode('utf8')))
    
       def onClose(self, wasClean, code, reason):
          print("WebSocket connection closed: {0}".format(reason))
    
    
    
    if __name__ == '__main__':
    
       import sys
    
       from twisted.python import log
       from twisted.internet import reactor
    
       log.startLogging(sys.stdout)
    
       #~ factory = WebSocketClientFactory("ws://localhost:9000", debug = False)
       factory = WebSocketClientFactory("ws://ngrok.com:xxxxx", debug = False)
    
       factory.protocol = MyClientProtocol
    
       reactor.connectTCP("ws://ngrok.com", xxxxx, factory)
       reactor.run()
    

This is the ngrok command: **./ngrok -proto=tcp 9000**

What am I doing wrong here?


Answer: I tried using

`ngrok http 8091`

(where 8091 is the port where my WebsocketServer is running using Racthet IO)
and it works. I can still connect to the Websocket replacing the `http` with
`ws` on the connection.

