How to (de)construct data frames in WebSockets hybi 08+?

Question

Since Chrome updated to v14, they went from version three of the draft to version eight of the draft.

I have an internal chat application running on WebSocket, and a

Answer 1

To be more accurate, Chrome has gone from the Hixie-76 version of the protocol to the HyBi-10 version of the protocol. HyBi-08 through HyBi-10 all report as version 8 because it was really only the specification text that changed and not the wire format.

The framing has changed from using '\x00...\xff' to using a 2-7 byte header for each frame that contains the length of the payload among other things. There is a diagram of the frame format in section 4.2 of the specification. Also note that data from the client (browser) to the server is masked (4 bytes of the client-server frame headers contain the unmasking key).

You can look at websockify which is a WebSockets to TCP socket proxy/bridge that I created to support noVNC. It is implemented in python but you should be able to get the idea from the encode_hybi and decode_hybi routines.