C# httplistener 简单的高并发http服务器

C#调用httplistener实现简单的http服务器例子：编译后是一个控制台应用程序，启动后，可通过 http://127.0.0.1/ 访问，采用了回调模式提供http服务，支持高并发

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.IO;
using System.Web;

namespace ConsoleApplication1
{
    class Program
    {
        static HttpListener sSocket = null;
        public static string modulePath;

        static void Main（string[] args）
        {
            sSocket = new HttpListener（）;
            sSocket.Prefixes.Add（“http://127.0.0.1:80/“）;
            sSocket.Start（）;
            sSocket.BeginGetContext（new AsyncCallback（GetContextCallBack） sSocket）;

            modulePath = System.AppDomain.CurrentDomain.baseDirectory;
            Console.WriteLine（“modulePath : “+modulePath+“\n“）;
            Console.Read（）;
        }

        static void GetContextCallBack（IAsyncResult ar）
        {
            try
            {
                sSocket = ar.AsyncState as HttpListener;
                HttpListenerContext context = sSocket.EndGetContext（ar）;
                sSocket.BeginGetContext（new AsyncCallback（GetContextCallBack） sSocket）;
                HttpListenerRequest request = context.Request;
                HttpListenerResponse response = context.Response;
                Console.WriteLine（request.Url.PathAndQuery）;

                string username = HttpUtility.ParseQueryString（request.Url.Query）.Get（“username“）;
                string pwd = HttpUtility.ParseQueryString（request.Url.Query）.Get（“pwd“）;

                string absPath = request.Url.AbsolutePath.Substring（1）;
                Console.WriteLine（“absPath:“+absPath）;

                if （absPath == “favicon.ico“）
                {
                    string filename=Path.Combine（modulePathabsPath）;
                    if（File.Exists（filename））
                    {
                        try
                        {
                            Console.WriteLine（“Process ico“）;
                            Stream input = new FileStream（filename FileMode.Open）;
                            string mime = “image/x-icon“;
                            response.ContentType = mime;
                            response.ContentLength64 = input.Length;
                            response.AddHeader（“Date“ DateTime.Now.ToString（“r“））;
                            response.AddHeader（“Last-Modified“ File.GetLastWriteTime（filename）.ToString（“r“））;

                            byte[] obuffer = new byte[1024 * 32];
                            int nbytes;
                            while （（nbytes = input.Read（obuffer 0 obuffer.Length）） > 0）
                            {
                                response.OutputStream.Write（obuffer 0 nbytes）;
                            }
                            
                            input.Close（）;
                            response.OutputStream.Flush（）;
                            response.StatusCode = （int）HttpStatusCode.OK;
                            obuff