javascript - 无法使用javascript连接网络套接字

Question

我想连接到我的 web 套接字，它使用一些 ip 放在 amazone 实例上。我可以将我的网络套接字与一些 ip 和端口连接到 google rest 客户端应用程序并且它工作得很好。截屏 :

但是如果我想用 java 脚本连接它，它就无法连接。这在 2-3 个月前工作正常。我没有改变和事情，但它现在不工作。如果我想连接 firefox，它会产生错误。这是我的代码:-

function init() {
           var host = "ws://XX.XX.XXX.XXX:XXXX"; // SET THIS TO YOUR SERVER


                try {
                  var socket = new WebSocket(host);
                   // alert('WebSocket - status ' + socket.readyState);
                    log('WebSocket - status ' + socket.readyState);

                    socket.onopen = function (msg) {
                        alert('open');
                        alert("Welcome - status " + this.readyState);
                        log("Welcome - status " + this.readyState);

                        if (this.readyState != 1)
                        {
                            reconnect();
                        }
                    };
                    socket.onmessage = function (msg) {
                      //  alert("Received: " + msg.data);
                        log("Received: " + msg.data);

                    };
                    socket.onclose = function (msg) {
                     //   alert("Disconnected - status " + this.readyState);
                        log("Disconnected - status " + this.readyState);
                    };
                } catch (ex) {
                    alert(ex);
                    log(ex);
                }
                $("msg").focus();
            }

这是警报状态 0 并且错误显示在控制台中:-

Firefox can't establish a connection to the server at ws://XX.XX.XXX.XXX:XXXX.


var socket = new WebSocket(host);

Answer 1

我会尝试你的代码，对我来说工作得很好，我会用这个网页测试它:https://www.websocket.org/echo.html ，也许有助于测试目的。但我也发现了这个问题:websocket-rails, websocket handshake error ，也许也有帮助。但是我只是将您代码中的主机更改为:“ws://echo.websocket.org”，并且一切正常。希望您找到解决方案并且此信息对您有所帮助。这是我用于测试的代码:

function init() {
var host = "ws://echo.websocket.org"; 
    try {
      var socket = new WebSocket(host);
       alert('WebSocket - status ' + socket.readyState);
        socket.onopen = function (msg) {
            alert('open');
            alert("Welcome - status " + this.readyState);

            if (this.readyState != 1)
            {
                reconnect();
            }
        };
        socket.onmessage = function (msg) {
          alert("Received: " + msg.data);
        };
        socket.onclose = function (msg) {
           alert("Disconnected - status " + this.readyState);
        };
    } catch (ex) {
        alert(ex);

    }
    $("msg").focus();
}

*抱歉我的英语不好。