Error during WebSocket handshake: 'Connection' header is missing
0
悬赏园豆：50
[已关闭问题]
关闭于 2017-06-16 00:01
在进行使用websocket第一次握手的时候，出现了Error during WebSocket handshake: 'Connection' header is missing错误。
服务调试的时候确实少了
但是我在程序上确实加了，具体代码如下：
using System; using System.Collections.Specialized; using System.Net; using System.Net.Sockets; using System.Text; namespace ConsoleApplication2 { internal class Program { private static void Main(string[] args) { HttpListener listener = new HttpListener(); listener.Prefixes.Add("http://localhost:8089/"); //要监听的url范围 listener.Start(); //开始监听端口，接收客户端请求 Console.WriteLine("Listening"); try { while (true) { //获取一个客户端请求为止 HttpListenerContext context = listener.GetContext(); //将其处理过程放入线程池 System.Threading.ThreadPool.QueueUserWorkItem(ProcessHttpClient, context); } } catch (Exception e) { Console.WriteLine(e.Message); } finally { listener.Stop(); //关闭HttpListener } } //客户请求处理 private static void ProcessHttpClient(object obj) { HttpListenerContext context = obj as HttpListenerContext; HttpListenerRequest request = context.Request; HttpListenerResponse response = context.Response; if (IsUpgradeTo(request, "websocket")) { response.StatusCode = 101; response.Headers["Connection"] = "Upgrade"; response.Headers["Upgrade"] = "websocket"; string _base64Key = request.Headers["Sec-WebSocket-Key"]; response.Headers["Sec-WebSocket-Accept"] = SocketHelper.CreateResponseKey(_base64Key); if (request.Headers["Sec-WebSocket-Protocol"] != null) { response.Headers["Sec-WebSocket-Protocol"] = request.Headers["Sec-WebSocket-Protocol"]; } if (request.Headers["Sec-WebSocket-Version"] != null) response.Headers["Sec-WebSocket-Version"] = request.Headers["Sec-WebSocket-Version"]; if (request.Headers["Sec-WebSocket-Extensions"] != null) response.Headers["Sec-WebSocket-Extensions"] = request.Headers["Sec-WebSocket-Extensions"]; } else { } //do something as you want string responseString = string.Format("<HTML><BODY> {0}</BODY></HTML>", DateTime.Now); byte[] buffer = System.Text.Encoding.UTF8.GetBytes(responseString); response.ContentLength64 = buffer.Length; System.IO.Stream output = response.OutputStream; output.Write(buffer, 0, buffer.Length); output.Flush(); //关闭输出流，释放相应资源 output.Close(); } public static bool IsUpgradeTo(HttpListenerRequest request, string protocol) { if (request == null) throw new ArgumentNullException("request"); if (protocol == null) throw new ArgumentNullException("protocol"); if (protocol.Length == 0) throw new ArgumentException("An empty string.", "protocol"); return Contains(request.Headers, "Upgrade", protocol) && Contains(request.Headers, "Connection", "Upgrade"); } public static bool Contains(NameValueCollection collection, string name, string value) { if (collection == null || collection.Count == 0) return false; var vals = collection[name]; if (vals == null) return false; foreach (var val in vals.Split(',')) if (val.Trim().Equals(value, StringComparison.OrdinalIgnoreCase)) return true; return false; } } }
客户端调用代码
<!DOCTYPE html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title></title> <script src="~/Scripts/jquery-1.8.2.min.js"></script> <script> var ws; $().ready(function () { $('#conn').click(function () { //ws = new WebSocket('ws://' + window.location.hostname + ':' + '4649/Echo/'); ws = new WebSocket('ws://' + window.location.hostname + ':' + '8089'); $('#tips').text('正在连接'); ws.onopen = function () { $('#tips').text('已经连接'); } ws.onmessage = function (evt) { $('#tips').text(evt.data); } ws.onerror = function (evt) { $('#tips').text(JSON.stringify(evt)); } ws.onclose = function () { $('#tips').text('已经关闭'); } }); $('#close').click(function () { ws.close(); }); $('#send').click(function () { if (ws.readyState == WebSocket.OPEN) { ws.send($('#content').val()); } else { $('#tips').text('连接已经关闭'); } }); }); </script> </head> <body> <form id="form1" runat="server"> <div> <input id="conn" type="button" value="连接" /> <input id="close" type="button" value="关闭" /> <span id="tips"></span> <input id="content" type="text" /> <input id="send" type="button" value="发送" /> </div> </form> </body>
希望各位帮忙看看到底是为什么？由于不允许使用4.5的frame框架，只能使用4.0及以下的框架。
