JavaScript WebSocket 尝试打开...然后关闭，没有错误

Question

我正在尝试验证 WebSockets HTML5 和 JavaScript 的工作原理。我没有看到任何错误，但似乎只是挂起一会儿，然后调用关闭的回调。不确定我做错了什么，但我认为 onopen 回调函数会在这里被调用。

            var socket;

            window.onload = function(argument) {

                try
                {

                    document.getElementById("console").innerHTML = "Opening WebSocket...";

                    socket = new WebSocket("ws://undergroundtechnetwork.com:8080/");

                    socket.onopen = function(){
                        document.getElementById("console").innerHTML += "<br />WebSocket opened.";
                    }

                    socket.onmessage = function(message){
                        document.getElementById("console").innerHTML += "<br />WebSocket recieved a message: " + message;
                    }

                    socket.onclose = function(){  

                         document.getElementById("console").innerHTML += "<br />WebSocket status: " + GetSocketStateName(socket.readyState);  
                    }

                    socket.onerror = function(e){
                    document.getElementById("console").innerHTML += "<br />WebSocket error message:<br />" + JSON.stringify(e);
                }


                }catch(e){
                    document.getElementById("console").innerHTML += "<br />Exception: " + e;
                }

            }

            function GetSocketStateName(state){
                var strSocketState;

                if(socket.readyState == 0){
                    strSocketState = "Connecting";
                }else if(socket.readyState == 1){
                    strSocketState = "Open";
                }else if(socket.readyState == 2){
                    strSocketState = "Closing";
                }else if(socket.readyState == 3){
                    strSocketState = "Closed";
                }

                return strSocketState;
            }

更新:

这是我在错误中遇到的错误。我没有收到 8080 的错误，但那是因为它没有实际打开(它是托管服务服务器)

{"cancelBubble":false,"returnValue":true,"srcElement":{"binaryType":"blob","扩展名":"","协议(protocol)":"","bufferedAmount":0,"readyState":0,"url":"ws://undergroundtechnetwork.com/","URL":"ws://undergroundtechnetwork.com/"},"defaultPrevented":false,"timeStamp":1369930726244,"可取消":false,"bubbles":false,"eventPhase":2,"currentTarget":{"binaryType":"blob","扩展名":"","协议(protocol)":"","bufferedAmount":0,"ReadyState":0,"url":"ws://undergroundtechnetwork.com/","URL":"ws://undergroundtechnetwork.com/"},"target":{"binaryType":"blob","扩展名":"","协议(protocol)":"","bufferedAmount":0,"readyState":0,"url":"ws://undergroundtechnetwork.com/","URL":"ws://undergroundtechnetwork .com/"},"类型":"错误"}

Answer 1

你的 JavaScript 看起来没问题。如果你改变

socket = new WebSocket("ws://undergroundtechnetwork.com:8080/");

比方说

socket = new WebSocket("ws://echo.websocket.org");

效果很好。尝试调整您的 WebSocket 服务器。