502 BadGateway after handshake

[sunchenliang]

Hello,

I'm trying to connect to the socket.io in a windows 8 store app.
I'm using the Windows.Networking.Sockets namespace.

1. I did a http handshake and it is successful. I got the response.
2. I tried to connect with websocket to the url: ws://host:port/socket.io/1/websocket/session_id
   And I got an exception :
   502 BadGateway : The server was acting as a gateway or proxy and received an invalid response from the upstream server.
   It would be great if somebody could tell why. Thanks