Websocket握手失败404（golang服务器）

Question

我有一个简单的Go Web服务器，该服务器在localhost：8080端口上提供一个公用文件夹，该公用文件夹同时包含html文件以及具有websocket逻辑的客户端脚本。

在我的main.go文件中

listener, err := net.listen("tcp", "localhost:8080")
if err != nil {
    log.Fatal(err)
}
//full code in gist https://gist.github.com/Kielan/98706aaf5dc0be9d6fbe

然后在我的客户脚本中

try {
    var sock = new WebSocket("ws://127.0.0.1:8080");
    console.log("Websocket - status: " + sock.readyState);

    sock.onopen = function(message) {
    console.log("CONNECTION opened..." + this.readyState);
    //onmessage, onerr, onclose, ect...
}

我在Chrome中收到错误

WebSocket connection to 'ws://127.0.0.1:8080/' failed: Error during WebSocket handshake: Unexpected response code: 200

和Firefox

Firefox can't establish a connection to the server at ws://127.0.0.1:8080/.

我发现这篇文章涉及到node.js，指示将/ websocket添加到我的客户端websocket字符串中，尽管它不能解决问题并导致404

我认为响应码200很好，是否需要以某种方式将请求转换为websocket，也许默认为http？ 如果可以，我该怎么做？

Answer 1

就像JimB指出的那样，您尚未处理http或websocket连接。

您可以使用包github.com/gorilla/websocket进行websocket处理。这是一个简单的设置：

package main

import (    
    "log"
    "net/http"
    "github.com/gorilla/websocket"
)

// wsHandler implements the Handler Interface
type wsHandler struct{}

func main() {
    router := http.NewServeMux()
    router.Handle("/", http.FileServer(http.Dir("./webroot"))) //handles static html / css etc. under ./webroot
    router.Handle("/ws", wsHandler{}) //handels websocket connections

    //serving
    log.Fatal(http.ListenAndServe("localhost:8080", router))
}

func (wsh wsHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
    // upgrader is needed to upgrade the HTTP Connection to a websocket Connection
        upgrader := &websocket.Upgrader{
            ReadBufferSize:  1024,
            WriteBufferSize: 1024,
        }

        //Upgrading HTTP Connection to websocket connection
        wsConn, err := upgrader.Upgrade(w, r, nil)
        if err != nil {
            log.Printf("error upgrading %s", err)
            return
        }

        //handle your websockets with wsConn
}

然后，在您的Javascript中，需要var sock = new WebSocket("ws://localhost/ws:8080"); 明显。