websocket服务端执行报错

System.Net.Sockets.SocketException (0x80004005): 以一种访问权限不允许的方式做了一个访问套接字的尝试。
在 System.Net.Sockets.Socket.DoBind(EndPoint endPointSnapshot, SocketAddress socketAddress)
在 System.Net.Sockets.Socket.Bind(EndPoint localEP)
在 WebSocket.Program.Main(String[] args) 位置 E:\request\webSocket\WebSocket\Program.cs:行号 36
当我执行服务器端的时候就报如上的错误,求教怎么解决?

1个回答

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<div class="post-text" itemprop="text"> <p>Fairly new gopher here. Limited experience.</p> <p>I am going through a book that explores websockets and I hit a dead end. I have assembled a simple chat app with the examples from the book and when I run it I hit the following error:</p> <blockquote> <p>WebSocket connection to 'ws://localhost:5000/room' failed: Error during WebSocket handshake: Unexpected response code: 200</p> </blockquote> <p>Does anybody know what causes this?</p> <p>main.go</p> <pre><code>package main import ( "html/template" "log" "net/http" "path/filepath" "sync" ) type templateHandler struct { //once is an object that will perform exactly one action once sync.Once filename string templ *template.Template } func (t *templateHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) { //this function call will be executed only once t.once.Do(func() { t.templ = template.Must(template.ParseFiles(filepath.Join("templates", t.filename))) log.Println("one time") }) t.templ.Execute(w, nil) } func main() { http.Handle("/", &amp;templateHandler{filename: "chat.html"}) if err := http.ListenAndServe(":5000", nil); err != nil { log.Fatal("ListenAndServe", err) } } </code></pre> <p>client.go</p> <pre><code>package main //Notes on channels //read from channel x to a //a := &lt;- x //write 5 to channel x //x &lt;- 5 import ( "github.com/gorilla/websocket" ) //client represents a single chatting user. type client struct { //client represents a single chatting user socket *websocket.Conn //sent is a channel on which messages are sent send chan []byte //room is the room this client is chatting in room *room } func (c *client) read() { for { //if err is nil after the execution of ReadMessage() //execute the line between the braces if _, msg, err := c.socket.ReadMessage(); err == nil { c.room.forward &lt;- msg } else { break } } c.socket.Close() } func (c *client) write() { for msg := range c.send { if err := c.socket.WriteMessage(websocket.TextMessage, msg); err != nil { break } } c.socket.Close() } </code></pre> <p>room.go</p> <pre><code>package main import ( "log" "net/http" "github.com/gorilla/websocket" ) type room struct { //forward is a channel that holds incoming messages //that should be forwarded to other clients forward chan []byte //join is a channel for clients wishing to join the room join chan *client //leave is a channel for clients wishing to leave the room. leave chan *client //clients holds al the current clients in this room. clients map[*client]bool } func (r *room) run() { for { select { case client := &lt;-r.join: //joining r.clients[client] = true case client := &lt;-r.leave: //leaving delete(r.clients, client) close(client.send) case msg := &lt;-r.forward: //forward message to all clients for client := range r.clients { select { case client.send &lt;- msg: default: //failed to send delete(r.clients, client) close(client.send) } } } } } const ( socketBufferSize = 1024 messageBufferSize = 256 ) //in order for the browser to switch to the websocket //protocol a header with an upgrade request from http //to websocket must be sent var upgrader = &amp;websocket.Upgrader{ ReadBufferSize: socketBufferSize, WriteBufferSize: socketBufferSize, } func (r *room) ServeHTTP(w http.ResponseWriter, req *http.Request) { socket, err := upgrader.Upgrade(w, req, nil) if err != nil { log.Fatal("ServeHTTP:", err) return } client := &amp;client{ socket: socket, send: make(chan []byte, messageBufferSize), room: r, } r.join &lt;- client defer func() { r.leave &lt;- client }() go client.write() client.read() } </code></pre> <p>chat.html</p> <pre><code>&lt;!DOCTYPE html&gt; &lt;html&gt; &lt;head&gt; &lt;title&gt;Chat&lt;/title&gt; &lt;style&gt; input {display:block;} ul{list-style:none;} &lt;/style&gt; &lt;/head&gt; &lt;body&gt; &lt;ul id="messages"&gt;&lt;/ul&gt; &lt;form id="chatbox"&gt; &lt;textarea&gt;&lt;/textarea&gt; &lt;input type="submit" value="Send" /&gt; &lt;/form&gt; &lt;script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"&gt; &lt;/script&gt; &lt;script&gt; $(function(){ var socket = null; var msgBox = $("#chatbox textarea"); var messages = $("#messages"); $("#chatbox").submit(function(){ if (!msgBox.val()) return false; if (!socket) { alert("Error: There is no socket connection."); return false; } socket.send(msgBox.val()); msgBox.val(""); return false; }); if (!window["WebSocket"]) { alert("Error: Your browser does not support web sockets.") }else { socket = new WebSocket("ws://localhost:5000/room"); socket.onclose = function() { alert("Connection has been closed."); } socket.onmessage = function(e) { messages.append($("&lt;li&gt;").text(e.data)); } } }); &lt;/script&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> </div>

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