Gorilla Websocket：WebSocket 握手期间出错：意外响应代码：404

Question

我克隆了 gorilla websocket 聊天示例并将其更新为使用多个房间。但是，我收到错误消息： Error during WebSocket handshake: Unexpected response code: 404 每当我尝试建立连接时在 chrome 中。我的源代码在github上可用。它与原始示例非常相似，只是略有改动。我不知道为什么它不起作用。编辑：问题出现在这行代码中：for _, name := range []string{"arduino", "java", "go", "scala"} {    room := newRoom("go")    http.Handle("/chat/go", room)    go room.run()}循环切片会导致 httphandle 函数出现问题。相反，我单独声明它们：room := newRoom("go")http.Handle("/chat/go", room)go room.run()...有用。我怎样才能解决这个问题？

Answer 1

所以实际上从你的index.html文件中，你连接到错误的 url

<!-- index.html -->

<script>

    var serviceLocation = "ws://0.0.0.0:8080/chat/";

.....

    function connectToChatserver() {

        room = $('#chatroom option:selected').val();

        wsocket = new WebSocket(serviceLocation + room);

        // it connect to /chat/<room>, it has slash after chat

这是您的网址main.go

    http.Handle("/chat"+name, room)

它会使 url 像这样：http://localhost:8080/chatgo，而不是你想要的：http://localhost:8080/chat/go

Fyi，它会因为你没有正确处理而出错channel，所以在我发送1条消息后，它会自动关闭。但这是另一个话题。

2020/08/04 06:42:10 running chat room java

2020/08/04 06:42:10 running chat room go

2020/08/04 06:42:10 running chat room arduino

2020/08/04 06:42:10 running chat room scala

2020/08/04 06:42:15 new client in room arduino

2020/08/04 06:42:15 client leaving room arduino

2020/08/04 06:42:15 client leaving room arduino

panic: close of closed channel

goroutine 6 [running]:

main.(*Room).run(0xc00007ac90)

        /home/fahim/Projects/Golang/go-chat/room.go:70 +0x3b5

created by main.main

        /home/fahim/Projects/Golang/go-chat/main.go:17 +0x2bd

exit status 2