• Fumitoshi Ukai's avatar
    go.net/websocket: fix handshake error. · 4c1c96f7
    Fumitoshi Ukai authored
    If client sent no subprotocol (e.g. no Sec-WebSocket-Protocol),
    websocket server responded with the following header
      HTTP/1.1 101 Switching Protocols
      Upgrade: websocket
      Connection: Upgrade
      Sec-WebSocket-Accept: E7SRWRnZL9RuGFLuZ0j4508nqdg=
      Sec-WebSocket-Protocol:
    So, client may close the connection because it contains
    wrong empty Sec-WebSocket-Protocol header.
    
    If client didn't offer any subprotocol, don't set
    config.Protocol, so that not emit empty Sec-WebSocket-Protocol.
    
    Fixes golang/go#5457.
    
    R=golang-dev, mikioh.mikioh
    CC=golang-dev
    https://golang.org/cl/9379044
    4c1c96f7
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