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HttpListener 实现web服务端

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.Threading;
using System.Threading.Tasks;
using System.IO;

namespace HttpListen
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] arr = { "http://localhost:37090/", "http://zhihu.org.cn/a/" };
          //  SimpleListenerExample(arr);
           // test1(arr[1]);
            HttpServer httpServer;
            //if (args.GetLength(0) > 0)
            //{
            //httpServer = new MyHttpServer(Convert.ToInt16(args[0]));
            httpServer = new MyHttpServer(2345);
            //} else {
            //    httpServer = new MyHttpServer(8080);
            //}
            Thread thread = new Thread(new ThreadStart(httpServer.listen));
            thread.Start();
          
        }

        //方法1
        // This example requires the System and System.Net namespaces.
        public static void SimpleListenerExample(string[] prefixes)
        {
            if (!HttpListener.IsSupported)
            {
                Console.WriteLine("Windows XP SP2 or Server 2003 is required to use the HttpListener class.");
                return;
            }
            // URI prefixes are required,
            // for example "http://contoso.com:8080/index/".
            if (prefixes == null || prefixes.Length == 0)
                throw new ArgumentException("prefixes");
        
            // Create a listener.
            HttpListener listener = new HttpListener();
            // Add the prefixes.
            foreach (string s in prefixes)
            {
                listener.Prefixes.Add(s);
            }
            listener.Start();
            Console.WriteLine("Listening...");

            Task.Factory.StartNew(() =>
            {

                // Note: The GetContext method blocks while waiting for a request. 
                HttpListenerContext context = listener.GetContext();
                HttpListenerRequest request = context.Request;
                // Obtain a response object.
                HttpListenerResponse response = context.Response;
                // Construct a response.
                string responseString = "<HTML><BODY> Hello world!</BODY></HTML>";
                byte[] buffer = System.Text.Encoding.UTF8.GetBytes(responseString);
                // Get a response stream and write the response to it.
                response.ContentLength64 = buffer.Length;
                System.IO.Stream output = response.OutputStream;
                output.Write(buffer, 0, buffer.Length);
                // You must close the output stream.
                output.Close();
                //  listener.Stop();

            });

          
            Console.WriteLine("ok");
            Console.ReadLine();
        }

        //方法2
        public static void test1(string url)
        {
            HttpListener httpListener = new HttpListener();

            httpListener.AuthenticationSchemes = AuthenticationSchemes.Anonymous;
            httpListener.Prefixes.Add(url);
            Console.WriteLine("开始监听··········");
            httpListener.Start();
            new Thread(new ThreadStart(delegate
            {
                while (true)
                {

                    HttpListenerContext httpListenerContext = httpListener.GetContext();
                    httpListenerContext.Response.StatusCode = 200;
                    using (StreamWriter writer = new StreamWriter(httpListenerContext.Response.OutputStream))
                    {
                        writer.WriteLine("<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"/><title>测试服务器</title></head><body>");
                        writer.WriteLine("<div style="height:20px;color:blue;text-align:center;"><p> hello</p></div>");
                        writer.WriteLine("<ul>");
                        writer.WriteLine("</ul>");
                        writer.WriteLine("</body></html>");

                   
                    }

                }
            })).Start();

        }

    }




  


}

方法3类文件：

using System;
using System.Collections;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Threading;

// offered to the public domain for any use with no restriction
// and also with no warranty of any kind, please enjoy. - David Jeske. 

// simple HTTP explanation
// http://www.jmarshall.com/easy/http/

namespace HttpListen
{

    public class HttpProcessor
    {
        public TcpClient socket;
        public HttpServer srv;

        private StreamReader inputStream;
        public StreamWriter outputStream;

        public String http_method;
        public String http_url;
        public String http_protocol_versionstring;
        public Hashtable httpHeaders = new Hashtable();


        private static int MAX_POST_SIZE = 10 * 1024 * 1024; // 10MB

        public HttpProcessor(TcpClient s, HttpServer srv)
        {
            this.socket = s;
            this.srv = srv;
        }

        public void process()
        {
            // bs = new BufferedStream(s.GetStream());
            inputStream = new StreamReader(socket.GetStream());
            outputStream = new StreamWriter(new BufferedStream(socket.GetStream()));
            try
            {
                parseRequest();
                readHeaders();
                if (http_method.Equals("GET"))
                {
                    handleGETRequest();
                }
                else if (http_method.Equals("POST"))
                {
                    handlePOSTRequest();
                }
            }
            catch (Exception e)
            {
                Console.WriteLine("Exception: " + e.ToString());
                writeFailure();
            }
            outputStream.Flush();
            // bs.Flush(); // flush any remaining output
            inputStream = null; outputStream = null; // bs = null;            
            socket.Close();
        }

        public void parseRequest()
        {
            String request = inputStream.ReadLine();
            string[] tokens = request.Split(' ');
            if (tokens.Length != 3)
            {
                throw new Exception("invalid http request line");
            }
            http_method = tokens[0].ToUpper();
            http_url = tokens[1];
            http_protocol_versionstring = tokens[2];

            Console.WriteLine("starting: " + request);
        }

        public void readHeaders()
        {
            Console.WriteLine("readHeaders()");
            String line;
            while ((line = inputStream.ReadLine()) != null)
            {
                if (line.Equals(""))
                {
                    Console.WriteLine("got headers");
                    return;
                }

                int separator = line.IndexOf(':');
                if (separator == -1)
                {
                    throw new Exception("invalid http header line: " + line);
                }
                String name = line.Substring(0, separator);
                int pos = separator + 1;
                while ((pos < line.Length) && (line[pos] == ' '))
                {
                    pos++; // strip any spaces
                }

                string value = line.Substring(pos, line.Length - pos);
                Console.WriteLine("header: {0}:{1}", name, value);
                httpHeaders[name] = value;
            }
        }

        public void handleGETRequest()
        {
            srv.handleGETRequest(this);
        }

        public void handlePOSTRequest()
        {
            // this post data processing just reads everything into a memory stream.
            // this is fine for smallish things, but for large stuff we should really
            // hand an input stream to the request processor. However, the input stream 
            // we hand him needs to let him see the "end of the stream" at this content 
            // length, because otherwise he won't know when he's seen it all! 

            Console.WriteLine("get post data start");
            int content_len = 0;
            MemoryStream ms = new MemoryStream();
            if (this.httpHeaders.ContainsKey("Content-Length"))
            {
                content_len = Convert.ToInt32(this.httpHeaders["Content-Length"]);
                if (content_len > MAX_POST_SIZE)
                {
                    throw new Exception(
                        String.Format("POST Content-Length({0}) too big for this simple server",
                          content_len));
                }
                byte[] buf = new byte[4096];
                int to_read = content_len;
                while (to_read > 0)
                {
                    int numread = this.inputStream.BaseStream.Read(buf, 0, Math.Min(4096, to_read));
                    to_read -= numread;
                    ms.Write(buf, 0, numread);
                }
                ms.Seek(0, SeekOrigin.Begin);
            }
            Console.WriteLine("get post data end");
            srv.handlePOSTRequest(this, new StreamReader(ms));

        }

        public void writeSuccess()
        {
            outputStream.Write("HTTP/1.0 200 OK
");
            outputStream.Write("Content-Type: text/html
");
            outputStream.Write("Connection: close
");
            outputStream.Write("
");
        }

        public void writeFailure()
        {
            outputStream.Write("HTTP/1.0 404 File not found
");
            outputStream.Write("Connection: close
");
            outputStream.Write("
");
        }
    }

    public abstract class HttpServer
    {

        protected int port;
        TcpListener listener;
        bool is_active = true;

        public HttpServer(int port)
        {
            this.port = port;
        }

        public void listen()
        {
            listener = new TcpListener(IPAddress.Parse("127.0.0.1"), port);
            listener.Start();
            while (is_active)
            {
                TcpClient s = listener.AcceptTcpClient();
                HttpProcessor processor = new HttpProcessor(s, this);
                Thread thread = new Thread(new ThreadStart(processor.process));
                thread.Start();
                Thread.Sleep(1);
            }
        }

        public abstract void handleGETRequest(HttpProcessor p);
        public abstract void handlePOSTRequest(HttpProcessor p, StreamReader inputData);
    }

    public class MyHttpServer : HttpServer
    {
        public MyHttpServer(int port)
            : base(port)
        {
        }
        public override void handleGETRequest(HttpProcessor p)
        {
            Console.WriteLine("request: {0}", p.http_url);
            p.writeSuccess();
            p.outputStream.WriteLine("<html><body><h1>test server</h1>");
            p.outputStream.WriteLine("Current Time: " + DateTime.Now.ToString());
            p.outputStream.WriteLine("url : {0}", p.http_url);

            p.outputStream.WriteLine("<form method=post action=/form>");
            p.outputStream.WriteLine("<input type=text name=foo value=foovalue>");
            p.outputStream.WriteLine("<input type=submit name=bar value=barvalue>");
            p.outputStream.WriteLine("</form>");
        }

        public override void handlePOSTRequest(HttpProcessor p, StreamReader inputData)
        {
            Console.WriteLine("POST request: {0}", p.http_url);
            string data = inputData.ReadToEnd();

            p.outputStream.WriteLine("<html><body><h1>test server</h1>");
            p.outputStream.WriteLine("<a href=/test>return</a><p>");
            p.outputStream.WriteLine("postbody: <pre>{0}</pre>", data);
        }
    }

  

}

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原文地址：https://www.cnblogs.com/tiancai/p/4716127.html