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关于WebSocket部署服务器外网无法连接的解决方案

黄舟
黄舟原创
2017-09-26 10:40:563920浏览

 首先要说的是我遇见的问题:

<span class="typ">WebSocket<span class="pln"> connection to <span class="str">'ws://www.xxxx.com/xxx/xx'<span class="pln"> failed<span class="pun">:<span class="pln"> <span class="typ">Error<span class="pln"> during <span class="typ">WebSocket<span class="pln"> handshake<span class="pun">:<span class="pln"> <span class="typ">Unexpected<span class="pln"> response code<span class="pun">:<span class="pln"> <span class="lit">200<br>网站绑定到了服务器,直接在服务器上访问webSocket服务是可行的,但是当我用外网访问时,这个错误就是我最大的敌人,在这之前还遇到过几个小毛贼,可以轻松解决,不再提,直面boss吧<br><br>花费两个下午的时间寻找解决方案,但是并没有找到,各种解决方案,但是直接来描述.NET下使用这一问题的,却是不多,然而面对了这一问题的朋友,大把的有。<br>这个无关浏览器问题,我有火狐,谷歌,IE测试过,该出的问题还是会有。<br>开发平台:.NET,利用ASP.NET MVC搭建网站</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span><span class="typ"><span class="pln"><span class="str"><span class="pln"><span class="pun"><span class="pln"><span class="typ"><span class="pln"><span class="typ"><span class="pln"><span class="pun"><span class="pln"><span class="typ"><span class="pln"><span class="pun"><span class="pln"><span class="lit">,在其中利用WebSocket服务,目的是在网站内设计一个讨论平台。<br></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>

<span class="typ"><span class="pln"><span class="str"><span class="pln"><span class="pun"><span class="pln"><span class="typ"><span class="pln"><span class="typ"><span class="pln"><span class="pun"><span class="pln"><span class="typ"><span class="pln"><span class="pun"><span class="pln"><span class="lit"><span style="font-size: 15px"><code><span class="typ"><span class="pln"><span class="str"><span class="pln"><span class="pun"><span class="pln"><span class="typ"><span class="pln"><span class="typ"><span class="pln"><span class="pun"><span class="pln"><span class="typ"><span class="pln"><span class="pun"><span class="pln"><span class="lit"> </span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>

<span class="typ"><span class="pln"><span class="str"><span class="pln"><span class="pun"><span class="pln"><span class="typ"><span class="pln"><span class="typ"><span class="pln"><span class="pun"><span class="pln"><span class="typ"><span class="pln"><span class="pun"><span class="pln"><span class="lit"><span style="font-size: 15px"><code><span class="typ"><span class="pln"><span class="str"><span class="pln"><span class="pun"><span class="pln"><span class="typ"><span class="pln"><span class="typ"><span class="pln"><span class="pun"><span class="pln"><span class="typ"><span class="pln"><span class="pun"><span class="pln"><span class="lit"> 具体来说一说:</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>

<span class="typ"><span class="pln"><span class="str"><span class="pln"><span class="pun"><span class="pln"><span class="typ"><span class="pln"><span class="typ"><span class="pln"><span class="pun"><span class="pln"><span class="typ"><span class="pln"><span class="pun"><span class="pln"><span class="lit"><span style="font-size: 15px"><code><span class="typ"><span class="pln"><span class="str"><span class="pln"><span class="pun"><span class="pln"><span class="typ"><span class="pln"><span class="typ"><span class="pln"><span class="pun"><span class="pln"><span class="typ"><span class="pln"><span class="pun"><span class="pln"><span class="lit"> </span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span><span class="typ"><span class="pln"><span class="str"><span class="pln"><span class="pun"><span class="pln"><span class="typ"><span class="pln"><span class="typ"><span class="pln"><span class="pun"><span class="pln"><span class="typ"><span class="pln"><span class="pun"><span class="pln"><span class="lit">首先,看下我的网页代码</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span><span class="typ"><span class="pln"><span class="str"><span class="pln"><span class="pun"><span class="pln"><span class="typ"><span class="pln"><span class="typ"><span class="pln"><span class="pun"><span class="pln"><span class="typ"><span class="pln"><span class="pun"><span class="pln"><span class="lit">:</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>


<script type="text/javascript">
        $(function () {            
        var url = "ws://xxxx:xx"+"@Url.Action("RequestProcessCenter")";            
        var ws;            
        function connect() {
                ws = new WebSocket(url);
                $("#TopicContent").append("正在连接\n");
                ws.onopen = function () {
                    $("#TopicContent").append("已经连接\n");
                };
                ws.onmessage = function (evt) {
                    console.log(evt.data);
                    $("#TopicContent").append(evt.data);
                };
                ws.onclose = function () {
                    $("#TopicContent").append("已经关闭\n");
                };
                ws.onerror = function (evt) {
                    console.log(evt.data);
                    $("#TopicContent").append(evt.data);
                };
            };
            $("#send").click(function () {
                console.log(1);
                console.log(ws.readyState);
                console.log(WebSocket.OPEN);                
                if (ws.readyState == WebSocket.OPEN) {
                    ws.send($("#content").val());
                    $(this).val("");
                }                else {
                    $("#TextMessge").append("连接已经关闭");
                }
            });
            $("#open").click(function () {
                connect();
            });
            $("#close").click(function () {
                ws.close();
            });
        });    </script>

后台代码:


public void RequestProcessCenter()
        {            if (HttpContext.IsWebSocketRequest)
            {                var currUser = GetCurrUser();                
            this._UserName = currUser.LoginName;
                HttpContext.AcceptWebSocketRequest(ProcessTopic);
            }            else
            {
                HttpContext.Response.Write("请求失败哟");
            }
        }

webSocket所要求的url格式我想应该是不会配错。

错误显示如图:

 返回200,尽管是请求成功了,但是结果不是我们想要的。

 

请求方式也确实是websocket,错误却存在了,这是为什么呢?查询了很多资料,但是并没有发现真正解决这一问题的,或许是我找的方式有问题,但是百度前三页我是看了,并没有想要的解决方案。自己动手,做了个测试,反而发现有效。

我在服务器上部署的网站,用的是默认的80端口,访问会失效,如果webSocket不用和网站绑定的同一端口呢?

经过该测试:

 1.本地80端口绑定域名 webSocket利用域名,端口80 无效
 2.本地80端口绑定域名 webSocket利用2017端口 主机地址用服务器ip地址 有效
 3.本地2017端口 未绑定域名 webSocket利用80端口 无效
 4.本地2017端口 未绑定域名 webSocket利用2017端口 有效

总结 80端口可能受系统限制
另一方面:域名绑定是否会影响 没有测试

 

成功解决了外网虽返回200却不能使用websocket服务的问题。

这种情况下需要注意的是,IIS服务器上需要添加两个网站了,一个用于正常的80端口网页访问,另一个做单独的WebSocket功能,这两个网站可以使用同一个程序版本,我就是这么做的,没有什么好的想法,菜鸟级人物。

 这个网站介绍了WebSocket的一些知识,以及websocket默认使用80-433端口,或许我在想,是不是我网站绑定的端口和websocket绑定相同端口时,外网请求就是此时出的错呢,这个问题也一时半会不能深究,暂时性的功能是达到了,但是感觉这个解决方案不是很好的,只能是说满足了需求,却不能简化需求过程。

 

留下一个猜想,我在服务器上访问时,是可行的,都是使用80端口,websocket服务能够正常使用,那是因为在服务器上发起时,直接访问的就是我本地服务,所以说防火墙不会阻止,但是我使用外网访问时,入网规则或许阻挡了我的请求,点击连接,发起调用WebSocket服务,而服务端口也使用80端口,引起防火墙识别出问题。

 

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