C# socket 与网页通讯

class Program
    {
        static Socket _socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);  //侦听socket
        static void Main(string[] args)
        {
            _socket.Bind(new IPEndPoint(IPAddress.Any, ));
            _socket.Listen();
            _socket.BeginAccept(new AsyncCallback(OnAccept), _socket);  //开始接收来自浏览器的http请求（其实是socket连接请求）
            Console.Read();
        }

        static void OnAccept(IAsyncResult ar)
        {
            try
            {
                Socket socket = ar.AsyncState as Socket;
                Socket new_client = socket.EndAccept(ar);  //接收到来自浏览器的代理socket
                //NO.1  并行处理http请求
                socket.BeginAccept(new AsyncCallback(OnAccept), socket); //开始下一次http请求接收   （此行代码放在NO.2处时，就是串行处理http请求，前一次处理过程会阻塞下一次请求处理）

                byte[] recv_buffer = new byte[ * ];
                int real_recv = new_client.Receive(recv_buffer);  //接收浏览器的请求数据
                string recv_request = Encoding.UTF8.GetString(recv_buffer, , real_recv);
                Console.WriteLine(recv_request);  //将请求显示到界面

                Resolve(recv_request, new_client);  //解析、路由、处理

                //NO.2  串行处理http请求
            }
            catch
            {

            }
        }

        /// <summary>
        /// 按照HTTP协议格式 解析浏览器发送的请求字符串
        /// </summary>
        /// <param name="request"></param>
        /// <param name="response"></param>
        static void Resolve(string request, Socket response)
        {
            //浏览器发送的请求字符串request格式类似这样：
            //GET /index.html HTTP/1.1
            //Host: 127.0.0.1:8081
            //Connection: keep-alive
            //Cache-Control: max-age=0
            //
            //id=123&pass=123       （post方式提交的表单数据，get方式提交数据直接在url中）

            string[] strs = request.Split(new string[] { "\r\n" }, StringSplitOptions.None);  //以“换行”作为切分标志
            if (strs.Length > )  //解析出请求路径、post传递的参数(get方式传递参数直接从url中解析)
            {
                string[] items = strs[].Split(' ');  //items[1]表示请求url中的路径部分（不含主机部分）
                Dictionary<string, string> param = new Dictionary<string, string>();

                if (strs.Contains(""))  //包含空行  说明存在post数据
                {
                    string post_data = strs[strs.Length - ]; //最后一项
                    if (post_data != "")
                    {
                        string[] post_datas = post_data.Split('&');
                        foreach (string s in post_datas)
                        {
                            param.Add(s.Split('=')[], s.Split('=')[]);
                        }
                    }
                }
                Route(items[], param, response);  //路由处理
            }
        }

        /// <summary>
        /// 按照请求路径（不包括主机部分）  进行路由处理
        /// </summary>
        /// <param name="path"></param>
        /// <param name="param"></param>
        /// <param name="response"></param>
        static void Route(string path, Dictionary<string, string> param, Socket response)
        {

            Console.WriteLine(path);

            Home.HomePage(response,path);

            //if (path.EndsWith("/"))  //请求首页
            //{
            //    Home.HomePage(response);
            //}
            //else if (path.EndsWith("login.zsp"))  //登录 处理页面
            //{
            //    //User.LoginCheck(param["id"], param["pass"], response);
            //}
            ////...
        }

        /// <summary>
        /// 请求首页
        /// </summary>
        class Home
        {
            public static void HomePage(Socket response,string text)
            {
                string statusline = "HTTP/1.1 200 OK\r\n";   //状态行
                byte[] statusline_to_bytes = Encoding.UTF8.GetBytes(statusline);

                string content =text;

                byte[] content_to_bytes = Encoding.UTF8.GetBytes(content);

                string header = string.Format("Content-Type:text/html;charset=UTF-8\r\nContent-Length:{0}\r\n", content_to_bytes.Length);
                byte[] header_to_bytes = Encoding.UTF8.GetBytes(header);  //应答头

                response.Send(statusline_to_bytes);  //发送状态行
                response.Send(header_to_bytes);  //发送应答头
                response.Send(new byte[] { (byte)'\r', (byte)'\n' });  //发送空行
                response.Send(content_to_bytes);  //发送正文（html）

                response.Close();
            }
            //...
        }

    }