1

我正在编写一个html需要创建websocket到服务器的页面

在服务器上，我使用“code.google.com/p/go.net/websocket”中的示例只是接受连接。

但是，在 Chrome26 中，响应是

WebSocket 连接到“ws://127.0.0.1:1234/”失败：意外响应代码：400

有什么遗漏（比如握手）吗？

这是我的html，服务器正在使用go 

<html>
<head></head>
<body>
<script type="text/javascript">
    var sock = null;
    var wsuri = "ws://127.0.0.1:1234";

    window.onload = function() {

        console.log("onload");

        sock = new WebSocket(wsuri);

        sock.onopen = function() {
            console.log("connected to " + wsuri);
        }

        sock.onclose = function(e) {
            console.log("connection closed (" + e.code + ")");
        }

        sock.onmessage = function(e) {
            console.log("message received: " + e.data);
        }
    };

    function send() {
        var msg = document.getElementById('message').value;
        sock.send(msg);
    };
</script>
<h1>WebSocket Echo Test</h1>
<form>
    <p>
        Message: <input id="message" type="text" value="Hello, world!">
    </p>
</form>
<button onclick="send();">Send Message</button>
</body>
</html>

//------------------------------------------

package main

import (
    "code.google.com/p/go.net/websocket"
    "fmt"
    "log"
    "net/http"
)

func Echo(ws *websocket.Conn) {
    var err error

    for {
        var reply string

        if err = websocket.Message.Receive(ws, &reply); err != nil {
            fmt.Println("Can't receive")
            break
        }

        fmt.Println("Received back from client: " + reply)

        msg := "Received:  " + reply
        fmt.Println("Sending to client: " + msg)

        if err = websocket.Message.Send(ws, msg); err != nil {
            fmt.Println("Can't send")
            break
        }
    }
}

func main() {
    http.Handle("/", websocket.Handler(Echo))
    if err := http.ListenAndServe(":1234", nil); err != nil {
        log.Fatal("ListenAndServe:", err)
    }
}
4

1 回答 1

5

Chrome 可能会抛出错误 400，因为它认为您正在尝试对 websocket 服务器进行跨域请求，并且认为您不太可能获得许可。

要解决这个问题，您只需从您的go-server 提供您的 html 即可。

因此，将您的sock.go代码更改为：

package main

import (
    "code.google.com/p/go.net/websocket"
    "fmt"
    "log"
    "net/http"
)

func Echo(ws *websocket.Conn) {
    var err error

    for {
        var reply string

        if err = websocket.Message.Receive(ws, &reply); err != nil {
            fmt.Println("Can't receive")
            break
        }

        fmt.Println("Received back from client: " + reply)

        msg := "Received:  " + reply
        fmt.Println("Sending to client: " + msg)

        if err = websocket.Message.Send(ws, msg); err != nil {
            fmt.Println("Can't send")
            break
        }
    }
}

func main() {
    http.Handle("/", http.FileServer(http.Dir("."))) // <-- note this line
    http.Handle("/socket", websocket.Handler(Echo))
    log.Println("serving")
    if err := http.ListenAndServe(":1234", nil); err != nil {
        log.Fatal("ListenAndServe:", err)
    }
}

并将您的index.html文件添加到与 sock.go 文件相同的目录中：

<html>
<head></head>
<body>
<script type="text/javascript">
    var sock = null;
    var wsuri = "ws://127.0.0.1:1234/socket"; // <-- note new path

    window.onload = function() {

        console.log("onload");

        sock = new WebSocket(wsuri);

        sock.onopen = function() {
            console.log("connected to " + wsuri);
        }

        sock.onclose = function(e) {
            console.log("connection closed (" + e.code + ")");
        }

        sock.onmessage = function(e) {
            console.log("message received: " + e.data);
        }
    };

    function send() {
        var msg = document.getElementById('message').value;
        sock.send(msg);
    };
</script>
<h1>WebSocket Echo Test</h1>
<form>
    <p>
        Message: <input id="message" type="text" value="Hello, world!">
    </p>
</form>
<button onclick="send();">Send Message</button>
</body>
</html>

现在您将能够从 chrome 中进行连接。

于 2013-04-08T17:12:36.323 回答