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alaingilbert
Add missing html tag in example/echo
5755884
Sep 26, 2017
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Sign up| // Copyright 2015 The Gorilla WebSocket Authors. All rights reserved. | |
| // Use of this source code is governed by a BSD-style | |
| // license that can be found in the LICENSE file. | |
| // +build ignore | |
| package main | |
| import ( | |
| "flag" | |
| "html/template" | |
| "log" | |
| "net/http" | |
| "github.com/gorilla/websocket" | |
| ) | |
| var addr = flag.String("addr", "localhost:8080", "http service address") | |
| var upgrader = websocket.Upgrader{} // use default options | |
| func echo(w http.ResponseWriter, r *http.Request) { | |
| c, err := upgrader.Upgrade(w, r, nil) | |
| if err != nil { | |
| log.Print("upgrade:", err) | |
| return | |
| } | |
| defer c.Close() | |
| for { | |
| mt, message, err := c.ReadMessage() | |
| if err != nil { | |
| log.Println("read:", err) | |
| break | |
| } | |
| log.Printf("recv: %s", message) | |
| err = c.WriteMessage(mt, message) | |
| if err != nil { | |
| log.Println("write:", err) | |
| break | |
| } | |
| } | |
| } | |
| func home(w http.ResponseWriter, r *http.Request) { | |
| homeTemplate.Execute(w, "ws://"+r.Host+"/echo") | |
| } | |
| func main() { | |
| flag.Parse() | |
| log.SetFlags(0) | |
| http.HandleFunc("/echo", echo) | |
| http.HandleFunc("/", home) | |
| log.Fatal(http.ListenAndServe(*addr, nil)) | |
| } | |
| var homeTemplate = template.Must(template.New("").Parse(` | |
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script> | |
| window.addEventListener("load", function(evt) { | |
| var output = document.getElementById("output"); | |
| var input = document.getElementById("input"); | |
| var ws; | |
| var print = function(message) { | |
| var d = document.createElement("div"); | |
| d.innerHTML = message; | |
| output.appendChild(d); | |
| }; | |
| document.getElementById("open").onclick = function(evt) { | |
| if (ws) { | |
| return false; | |
| } | |
| ws = new WebSocket("{{.}}"); | |
| ws.onopen = function(evt) { | |
| print("OPEN"); | |
| } | |
| ws.onclose = function(evt) { | |
| print("CLOSE"); | |
| ws = null; | |
| } | |
| ws.onmessage = function(evt) { | |
| print("RESPONSE: " + evt.data); | |
| } | |
| ws.onerror = function(evt) { | |
| print("ERROR: " + evt.data); | |
| } | |
| return false; | |
| }; | |
| document.getElementById("send").onclick = function(evt) { | |
| if (!ws) { | |
| return false; | |
| } | |
| print("SEND: " + input.value); | |
| ws.send(input.value); | |
| return false; | |
| }; | |
| document.getElementById("close").onclick = function(evt) { | |
| if (!ws) { | |
| return false; | |
| } | |
| ws.close(); | |
| return false; | |
| }; | |
| }); | |
| </script> | |
| </head> | |
| <body> | |
| <table> | |
| <tr><td valign="top" width="50%"> | |
| <p>Click "Open" to create a connection to the server, | |
| "Send" to send a message to the server and "Close" to close the connection. | |
| You can change the message and send multiple times. | |
| <p> | |
| <form> | |
| <button id="open">Open</button> | |
| <button id="close">Close</button> | |
| <p><input id="input" type="text" value="Hello world!"> | |
| <button id="send">Send</button> | |
| </form> | |
| </td><td valign="top" width="50%"> | |
| <div id="output"></div> | |
| </td></tr></table> | |
| </body> | |
| </html> | |
| `)) |