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Websocket problem
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| package main | |
| import ( | |
| "fmt" | |
| "log" | |
| "net/http" | |
| "net/http/httputil" | |
| "os" | |
| "time" | |
| "github.com/gorilla/websocket" | |
| ) | |
| var ( | |
| port = os.Getenv("VCAP_APP_PORT") | |
| ) | |
| func main() { | |
| if port == "" { | |
| port = "8080" | |
| } | |
| http.HandleFunc("/", indexHandler) | |
| http.HandleFunc("/websocket", wsHandler) | |
| http.ListenAndServe(":"+port, nil) | |
| } | |
| func wsHandler(rw http.ResponseWriter, req *http.Request) { | |
| dump, _ := httputil.DumpRequest(req, true) | |
| log.Println(string(dump)) | |
| if req.Header.Get("Origin") != "http://"+req.Host { | |
| http.Error(rw, "Origin not allowed", 403) | |
| return | |
| } | |
| conn, err := websocket.Upgrade(rw, req, nil, 1024, 1024) | |
| if err != nil { | |
| http.Error(rw, err.Error(), http.StatusBadRequest) | |
| return | |
| } | |
| for { | |
| if err := conn.WriteJSON(time.Now()); err != nil { | |
| fmt.Println(err) | |
| return | |
| } | |
| time.Sleep(1000 * time.Millisecond) | |
| } | |
| } | |
| func indexHandler(rw http.ResponseWriter, req *http.Request) { | |
| rw.Write([]byte(html)) | |
| } | |
| var html = ` | |
| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Simpe Websocket Test</title> | |
| </head> | |
| <body> | |
| <h1>Hello</h1> | |
| <textarea rows=20 cols=80 id="output"></textarea> | |
| <script> | |
| websocket = new WebSocket("ws://"+window.location.host+"/websocket"); | |
| websocket.onopen = function(evt) { console.log("open"); }; | |
| websocket.onclose = function(evt) { console.log("close"); }; | |
| websocket.onmessage = function(evt) { document.getElementById("output").value += evt.data; }; | |
| websocket.onerror = function(evt) { console.log(evt); }; | |
| </script> | |
| </body> | |
| </html> | |
| ` | |
| /* | |
| Request dumps: | |
| ------------- | |
| localhost: | |
| GET /websocket HTTP/1.1 | |
| Host: localhost:8080 | |
| Cache-Control: no-cache | |
| Connection: Upgrade | |
| Origin: http://localhost:8080 | |
| Pragma: no-cache | |
| Sec-Websocket-Extensions: permessage-deflate; client_max_window_bits, x-webkit-deflate-frame | |
| Sec-Websocket-Key: L6xw1OdN7oYLOAMzbYNGwA== | |
| Sec-Websocket-Version: 13 | |
| Upgrade: websocket | |
| User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/34.0.1847.132 Safari/537.36 | |
| PWS: | |
| ---- | |
| GET /websocket HTTP/1.1 | |
| Host: cfws.cfapps.io | |
| Accept-Encoding: gzip | |
| Cache-Control: no-cache | |
| Cookie: _ga=GA1.2.910257418.1377268645; _sm_au_c=iVV22fn1sFH6T1Pt0e | |
| Origin: http://cfws.cfapps.io | |
| Pragma: no-cache | |
| Sec-Websocket-Extensions: permessage-deflate; client_max_window_bits, x-webkit-deflate-frame | |
| Sec-Websocket-Key: nlxia5iSyEaEMVJ7XsWYOQ== | |
| Sec-Websocket-Version: 13 | |
| User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/34.0.1847.132 Safari/537.36 | |
| X-Forwarded-For: 95.172.74.46, 10.10.2.122 | |
| X-Forwarded-Port: 80 | |
| X-Forwarded-Proto: http | |
| X-Request-Start: 1400072665355 | |
| X-Vcap-Request-Id: 2b37bc59-171a-4061-43dc-257bef82f16a | |
| */ |
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