简单使用TCP模拟HTTP的GET和POST

目的仅使用TCP服务程序实现网页实时显示与控件交互。
新建控制台程序
复制下面代码
c#
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace http_TCP
{
    internal class Program
    {
        static void Main(string[] args)
        {
            Server server = new Server();
        }
    }
    class Server
    {
        private TcpListener tcpListener;
        private Thread listenThread;

        public Server()
        {
            this.tcpListener = new TcpListener(IPAddress.Any, 3000);
            this.listenThread = new Thread(new ThreadStart(ListenForClients));
            this.listenThread.Start();
            Console.WriteLine("Server started at "+ IPAddress.Any+" :"+ 3000+" @ " + DateTime.Now.ToString());
            
        }


        private void ListenForClients()
        {
            this.tcpListener.Start();

            while (true)
            {
                //blocks until a client has connected to the server
                TcpClient client = this.tcpListener.AcceptTcpClient();

                //create a thread to handle communication 
                //with connected client
                Thread clientThread = new Thread(new ParameterizedThreadStart(HandleClientComm));
                clientThread.Start(client);
            }
        }


        private void HandleClientComm(object client)
        {
            TcpClient tcpClient = (TcpClient)client;
            Console.WriteLine("Client @[{0}] connected @{1}", tcpClient.Client.LocalEndPoint, DateTime.Now.ToString());

            NetworkStream clientStream = tcpClient.GetStream();

            byte[] message = new byte[4096];
            int bytesRead = 0;
            //bool isRight=false;

            while (true)
            {
                bytesRead = 0;

                try
                {
                    //blocks until a client sends a message
                    bytesRead = clientStream.Read(message, 0, 4096);
                }
                catch(Exception ex)
                {
                    //a socket error has occured
                    //Console.WriteLine(ex.Message);
                    break;
                }

                if (bytesRead == 0)
                {
                    Console.WriteLine("Client @[{0}] disconnect @{1}", tcpClient.Client.LocalEndPoint, DateTime.Now.ToString());
                    break;
                }
                ASCIIEncoding encoder = new ASCIIEncoding();
                string recvstr = encoder.GetString(message, 0, bytesRead);
                if (recvstr.StartsWith("GET"))
                {
                    Console.WriteLine("响应GET");
                    string content = "HTTP/1.1 200 OK\r\n" +
                        "Date: Mon, 27 Jul 2009 12:28:53 GMT\r\n" +
                        "Server: ApacheLast-Modified: Wed, 22 Jul 2009 19:15:56\r\n" +
                        "GMTETag: \"34aa387-d-1568eb00\"\r\nAccept-Ranges: bytes\r\n" +
                        "Content-Type: text/html;charset=UTF-8\r\n\r\n" +
                        "<!DOCTYPE html>\r\n<html lang=\"en\">\r\n<head>\r\n" +
                        "<meta charset=\"UTF-8\">\r\n<meta http-equiv='Content-Type' content='text/html'; charset='GB2312'/>\r\n" +
                        "<meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\r\n<title>tcp_to_http</title>\r\n" +
                        "</head>\r\n<body>\r\n<p><label  class='LeftLabel'>name:</label>\r\n" +
                        "<input type='text' id='meterName' name='meterName' size='16' value=\"25231235\"/>\r\n" +
                        "</p>\r\n<script>\r\nsetInterval('updateWeightState()',2000);\r\nfunction updateWeightState()\r\n" +
                        "{\r\nconst xhr = new   XMLHttpRequest();\r\n" +
                        "xhr.open('post','/updateWeightState'+document.getElementById('meterName').value);\r\n" +
                        "xhr.send();\r\nxhr.onreadystatechange = function ()\r\n{\r\n" +
                        "document.getElementById('meterName').value=\"rec\"+xhr.readyState+\",\"+xhr.status+\",\"+xhr.response;\r\n" +
                        "}\r\n}\r\n</script>\r\n</body>\r\n</html>\r\n\r\n\r\n\r\n\r\n\r\n";
                    byte[] buffer = encoder.GetBytes(content);
                    clientStream.Write(buffer, 0, buffer.Length);
                    clientStream.Flush();
                   
                    clientStream.Close();
                    
                }
                else if (recvstr.StartsWith("POST"))
                {
                    Console.WriteLine("响应POST");
                    string content ="";
                    content += "HTTP/1.1 200 OK";
                    content += "Date: Mon, 27 Jul 2009 12:28:53 GMT";
                    content += "Server: ApacheLast-Modified: Wed, 22 Jul 2009 19:15:56";
                    content += "GMTETag: \"34aa387-d-1568eb00\"";
                    content += "Accept-Ranges: bytes";
                    content += "Content-Type: text/html;charset=UTF-8";
                    content += "Content-Length: 3\r\n\r\n";
                    content += "{uint=123}";
                    byte[] buffer = encoder.GetBytes(content);
                    clientStream.Write(buffer, 0, buffer.Length);
                    clientStream.Flush();
                    clientStream.Close();
                }
                }

            tcpClient.Close();
        }


    }
}