C# 利用socekt做到http监听，怎么样才能做到高性能

c#原始提供了http的监听的类HttpListener，实现了简单的http。文章地址《C# 控制台或者winform程序开启http的监听状态》

但是经过我测试，这个HttpListener提供的真的就只是简单的http监听功能，无法实现高并发处理。

不知道是我处理问题还是其他什么原因，无法实现，当上一个http请求连接尚未关闭的情况下，即便是把请求放到另外一个线程执行，都要等到处理结束，close了才能接受和处理下一次的连接请求。

也许你会说HttpListener不是提供了异步监听的嘛？异步不就可以类使用多线程实现嘛。但是经过我测试，确实没有得到我想要的实际效果。

所以另辟蹊径。http其实质就是socket的tcp封装实现的功能，单次请求，处理，关闭的socket功能。

所以这里找到了可以使用最原始的socket的来提供http监听，处理数据，关闭状态。

好了直接上代码，，一下代码部分来至于博客园，园友帖子提供，时间久远亦不知道是哪位仁兄的帖子，见谅。

  1   internal class HttpServer
  2     {
  3         private IPEndPoint _IP;
  4         private TcpListener _Listeners;
  5         private volatile bool IsInit = false;
  6         HashSet<string> Names;
  7
  8         /// <summary>
  9         /// 初始化服务器
 10         /// </summary>
 11         public HttpServer(string ip, int port, HashSet<string> names)
 12         {
 13             IPEndPoint localEP = new IPEndPoint(IPAddress.Parse(ip), port);
 14             this._IP = localEP;
 15             Names = names;
 16             if (Names == null)
 17             {
 18                 Names = new HashSet<string>();
 19             }
 20             try
 21             {
 22                 foreach (var item in names)
 23                 {
 24                     Console.WriteLine(string.Format(System.DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss:fff：") + "Start Listen Http Socket -> {0}:{1}{2} ", ip, port, item));
 25                 }
 26                 this._Listeners = new TcpListener(IPAddress.Parse(ip), port);
 27                 this._Listeners.Start(5000);
 28                 IsInit = true;
 29                 this.AcceptAsync();
 30             }
 31             catch (Exception ex)
 32             {
 33                 Console.WriteLine(ex);
 34                 this.Dispose();
 35             }
 36         }
 37
 38         private void AcceptAsync()
 39         {
 40             try
 41             {
 42                 this._Listeners.BeginAcceptTcpClient(new AsyncCallback(AcceptAsync_Async), null);
 43             }
 44             catch (Exception) { }
 45         }
 46
 47         private void AcceptAsync_Async(IAsyncResult iar)
 48         {
 49             this.AcceptAsync();
 50             try
 51             {
 52                 TcpClient client = this._Listeners.EndAcceptTcpClient(iar);
 53                 var socket = new HttpClient(client);
 54                 Console.WriteLine(System.DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss:fff：") + "Create Http Socket Remote Socket LocalEndPoint：" + client.Client.LocalEndPoint + " RemoteEndPoint：" + client.Client.RemoteEndPoint.ToString());
 55                 foreach (var item in Names)
 56                 {
 57                     if (socket.http_url.StartsWith(item))
 58                     {
 59                         try
 60                         {
 61                             socket.process();
 62                             return;
 63                         }
 64                         catch { break; }
 65                     }
 66                 }
 67                 socket.WriteFailure();
 68                 socket.Close();
 69             }
 70             catch (Exception) { }
 71         }
 72
 73         /// <summary>
 74         /// 释放资源
 75         /// </summary>
 76         public void Dispose()
 77         {
 78             if (IsInit)
 79             {
 80                 IsInit = false;
 81                 this.Dispose(true);
 82                 GC.SuppressFinalize(this);
 83             }
 84         }
 85
 86         /// <summary>
 87         /// 释放所占用的资源
 88         /// </summary>
 89         /// <param name="flag1"></param>
 90         protected virtual void Dispose([MarshalAs(UnmanagedType.U1)] bool flag1)
 91         {
 92             if (flag1)
 93             {
 94                 if (_Listeners != null)
 95                 {
 96                     try
 97                     {
 98                         Console.WriteLine(string.Format("Stop Http Listener -> {0}:{1} ", this.IP.Address.ToString(), this.IP.Port));
 99                         _Listeners.Stop();
100                         _Listeners = null;
101                     }
102                     catch { }
103                 }
104             }
105         }
106
107         /// <summary>
108         /// 获取绑定终结点
109         /// </summary>
110         public IPEndPoint IP { get { return this._IP; } }
111     }

这个是实现socket监听状态

  1  public class HttpClient
  2     {
  3         private static int MAX_POST_SIZE = 10 * 1024 * 1024; // 10MB
  4         private const int BUF_SIZE = 4096;
  5         private Stream inputStream;
  6         public StreamWriter OutputStream;
  7         public String http_method;
  8         public String http_url;
  9         public String http_protocol_versionstring;
 10         public Hashtable httpHeaders = new Hashtable();
 11         internal TcpClient _Socket;
 12
 13         /// <summary>
 14         /// 这个是服务器收到有效链接初始化
 15         /// </summary>
 16         internal HttpClient(TcpClient client)
 17         {
 18             this._Socket = client;
 19             inputStream = new BufferedStream(_Socket.GetStream());
 20             OutputStream = new StreamWriter(new BufferedStream(_Socket.GetStream()), UTF8Encoding.Default);
 21             ParseRequest();
 22         }
 23
 24         internal void process()
 25         {
 26             try
 27             {
 28                 if (http_method.Equals("GET"))
 29                 {
 30                     Program.Pool.ActiveHttp(this, GetRequestExec());
 31                 }
 32                 else if (http_method.Equals("POST"))
 33                 {
 34                     Program.Pool.ActiveHttp(this, PostRequestExec());
 35                 }
 36             }
 37             catch (Exception e)
 38             {
 39                 Console.WriteLine("Exception: " + e.ToString());
 40                 WriteFailure();
 41             }
 42         }
 43
 44         public void Close()
 45         {
 46             OutputStream.Flush();
 47             inputStream.Dispose();
 48             inputStream = null;
 49             OutputStream.Dispose();
 50             OutputStream = null; // bs = null;
 51             this._Socket.Close();
 52         }
 53
 54         #region 读取流的一行 private string ReadLine()
 55         /// <summary>
 56         /// 读取流的一行
 57         /// </summary>
 58         /// <returns></returns>
 59         private string ReadLine()
 60         {
 61             int next_char;
 62             string data = "";
 63             while (true)
 64             {
 65                 next_char = this.inputStream.ReadByte();
 66                 if (next_char == ‘\n‘) { break; }
 67                 if (next_char == ‘\r‘) { continue; }
 68                 if (next_char == -1) { Thread.Sleep(1); continue; };
 69                 data += Convert.ToChar(next_char);
 70             }
 71             return data;
 72         }
 73         #endregion
 74
 75         #region 转化出 Request private void ParseRequest()
 76         /// <summary>
 77         /// 转化出 Request
 78         /// </summary>
 79         private void ParseRequest()
 80         {
 81             String request = ReadLine();
 82             if (request != null)
 83             {
 84                 string[] tokens = request.Split(‘ ‘);
 85                 if (tokens.Length != 3)
 86                 {
 87                     throw new Exception("invalid http request line");
 88                 }
 89                 http_method = tokens[0].ToUpper();
 90                 http_url = tokens[1];
 91                 http_protocol_versionstring = tokens[2];
 92             }
 93             String line;
 94             while ((line = ReadLine()) != null)
 95             {
 96                 if (line.Equals(""))
 97                 {
 98                     break;
 99                 }
100                 int separator = line.IndexOf(‘:‘);
101                 if (separator == -1)
102                 {
103                     throw new Exception("invalid http header line: " + line);
104                 }
105                 String name = line.Substring(0, separator);
106                 int pos = separator + 1;
107                 while ((pos < line.Length) && (line[pos] == ‘ ‘))
108                 {
109                     pos++;//过滤键值对的空格
110                 }
111                 string value = line.Substring(pos, line.Length - pos);
112                 httpHeaders[name] = value;
113             }
114         }
115         #endregion
116
117         #region 读取Get数据 private Dictionary<string, string> GetRequestExec()
118         /// <summary>
119         /// 读取Get数据
120         /// </summary>
121         /// <returns></returns>
122         private Dictionary<string, string> GetRequestExec()
123         {
124             Dictionary<string, string> datas = new Dictionary<string, string>();
125             int index = http_url.IndexOf("?", 0);
126             if (index >= 0)
127             {
128                 string data = http_url.Substring(index + 1);
129                 datas = getData(data);
130             }
131             WriteSuccess();
132             return datas;
133         }
134         #endregion
135
136         #region 读取提交的数据 private void handlePOSTRequest()
137         /// <summary>
138         /// 读取提交的数据
139         /// </summary>
140         private Dictionary<string, string> PostRequestExec()
141         {
142             int content_len = 0;
143             MemoryStream ms = new MemoryStream();
144             if (this.httpHeaders.ContainsKey("Content-Length"))
145             {
146                 //内容的长度
147                 content_len = Convert.ToInt32(this.httpHeaders["Content-Length"]);
148                 if (content_len > MAX_POST_SIZE) { throw new Exception(String.Format("POST Content-Length({0}) 对于这个简单的服务器太大", content_len)); }
149                 byte[] buf = new byte[BUF_SIZE];
150                 int to_read = content_len;
151                 while (to_read > 0)
152                 {
153                     int numread = this.inputStream.Read(buf, 0, Math.Min(BUF_SIZE, to_read));
154                     if (numread == 0)
155                     {
156                         if (to_read == 0) { break; }
157                         else { throw new Exception("client disconnected during post"); }
158                     }
159                     to_read -= numread;
160                     ms.Write(buf, 0, numread);
161                 }
162                 ms.Seek(0, SeekOrigin.Begin);
163             }
164             WriteSuccess();
165             StreamReader inputData = new StreamReader(ms);
166             string data = inputData.ReadToEnd();
167             return getData(data);
168         }
169         #endregion
170
171         #region 输出状态
172         /// <summary>
173         /// 输出200状态
174         /// </summary>
175         public void WriteSuccess()
176         {
177             OutputStream.WriteLine("HTTP/1.0 200 OK");
178             OutputStream.WriteLine("Content-Type: text/html");
179             OutputStream.WriteLine("Connection: close");
180             OutputStream.WriteLine("");
181         }
182
183         /// <summary>
184         /// 输出状态404
185         /// </summary>
186         public void WriteFailure()
187         {
188             OutputStream.WriteLine("HTTP/1.0 404 File not found");
189             OutputStream.WriteLine("Content-Type: text/html");
190             OutputStream.WriteLine("Connection: close");
191             OutputStream.WriteLine("");
192         }
193         #endregion
194
195         /// <summary>
196         /// 分析http提交数据分割
197         /// </summary>
198         /// <param name="rawData"></param>
199         /// <returns></returns>
200         private static Dictionary<string, string> getData(string rawData)
201         {
202             var rets = new Dictionary<string, string>();
203             string[] rawParams = rawData.Split(‘&‘);
204             foreach (string param in rawParams)
205             {
206                 string[] kvPair = param.Split(‘=‘);
207                 string key = kvPair[0];
208                 string value = HttpUtility.UrlDecode(kvPair[1]);
209                 rets[key] = value;
210             }
211             return rets;
212         }
213     }

实现了对http数据请求处理

1 public interface ISocketPool
2     {
3         /// <summary>
4         ///
5         /// </summary>
6         /// <param name="client"></param>
7         void ActiveHttp(Fly.Network.SocketPool.Http.HttpClient client, Dictionary<string, string> parms);
8     }

 1 public class Program
 2     {
 3         public static MessagePool Pool = new MessagePool();
 4         static void Main(string[] args)
 5         {
 6             HttpServer https = new HttpServer("127.0.0.1", 80, new HashSet<string>() {"/test/","/flie/" });
 7             Console.ReadLine();
 8         }
 9     }
10     class MessagePool : ISocketPool
11     {
12         public void ActiveHttp(HttpClient client, Dictionary<string, string> parms)
13         {
14             Thread.Sleep(new Random().Next(0, 3000));
15             foreach (var item in parms)
16             {
17                 Console.WriteLine(DateTime.Now.NowString() + "item.Key：" + item.Key + "； item.Value：" + item.Value);
18             }
19             string strHtml = @"
20 <html><head></head>
21 <body>
22 <div>&nbsp;</div>
23 <div>&nbsp;</div>
24 <div>&nbsp;</div>
25 <div>&nbsp;</div>
26 <div>&nbsp;</div>
27 {0}
28 </body>
29 </html>
30 ";
31             client.OutputStream.WriteLine(string.Format(strHtml, DateTime.Now.NowString() + "xxxxxxxxxxx"));
32             client.Close();
33         }
34     }

程序启动过后，看到输出

2015-04-13 16:23:21:059：Start Listen Http Socket -> 127.0.0.1:80/test/
2015-04-13 16:23:21:069：Start Listen Http Socket -> 127.0.0.1:80/flie/

接下来我们在浏览器输入 127.0.0.1/test/

正常收到请求，输出程序

127.0.0.1/test/

这里test1这个并不是我们监听饿目录，根本不会处理，

接下来我们再看看这个效果 get提交的参数 127.0.0.1/test/?bb=test

输出了get提交过来的参数信息。可能你会奇怪，为什么一次请求会收到两次连接请求。这里我查看过了其中一次请求是浏览器自带的请求页面标签的icon连接请求，

如果你拷贝了程序，你现在可以实现跑来程序，然后输入网址，按着F5不放，看看服务器的承受能力，当然这里忽律了逻辑方面对cpu内存消耗和时间消耗问题。

测试看看吧。