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POWebsocket output received by browser, complains about "Invalid UTF-8 sequence in header value "
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copied!<p>When I load the page in my browser, the page gets served correctly. When the javascript executes, Chrome's console output says:</p> <pre><code>Invalid UTF-8 sequence in header value </code></pre> <p>I have searched for that string, and am unable to find any mention of it for golang.</p> <p>How do I go about telling golang not to write unicode characters to web sockets?</p> <p>I assume that this is the cause of the problem, as the "Network" tab only reveals an empty request and response for this.</p> <hr> <p>CCSSE:</p> <p>main.go:</p> <pre><code>package main import ( "fmt" "net/http" "log" "code.google.com/p/go.net/websocket" //"github.com/garyburd/go-websocket/websocket" ) const listenAddress = "localhost:9999" func wsHandler(webSck *websocket.Conn) { fmt.Fprint(webSck, "Rpy") fmt.Println("Sent \"Rpy\" to web socket", webSck) //more code here } func main() { http.Handle("/", http.FileServer(http.Dir("./static"))) http.Handle("/ws", websocket.Handler(wsHandler)) err := http.ListenAndServe(listenAddress, nil) if err != nil { log.Fatal(err) } } </code></pre> <p>static/main.js</p> <pre><code>var socket = new WebSocket("ws://localhost:9999/ws"); socket.onopen = function() { socket.onmessage = function(m) { console.log("Received: " + m); }; socket.send("Req\n"); }; </code></pre> <hr> <p>EDIT:</p> <p>As suggested by @Intermernet, I have set the <code>Sec-WebSocket-Protocol</code> header. To no avail, still getting <code>Invalid UTF-8 sequence in header value</code>.</p> <p>Note also that the reason I need to do <code>webSck.Config().Header = make(http.Header)</code> is that it is <code>nil</code> - confirmed by the log statement on <code>webSck.Config()</code>. Tack on to this another question - why do I have to do this; is there an intialisation step that I have missed somewhere?</p> <pre><code>func wsHandler(webSck *websocket.Conn) { webSck.Config().Header = make(http.Header) webSck.Config().Header.Add("Sec-WebSocket-Protocol", "chat") fmt.Printf("ws.Config() %#v\n", webSck.Config()) var buf []byte; buf = []byte("Rpy") _, err := webSck.Write(buf) if err != nil { fmt.Println("Error:", err) } else { fmt.Printf("Sent \"Rpy\" to web socket %#v\n", webSck) } } </code></pre>

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