.NET下通过HttpListener实现简单的Http服务

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading;
using System.Web;
using System.IO;
using Newtonsoft.Json;

namespace HttpListenerApp
{
 /// <summary>
 /// HttpRequest逻辑处理
 /// </summary>
 public class HttpProvider
 {

 private static HttpListener httpFiledownload; //文件下载处理请求监听
 private static HttpListener httOtherRequest; //其他超做请求监听

 /// <summary>
 /// 开启HttpListener监听
 /// </summary>
 public static void Init()
 {
 httpFiledownload = new HttpListener(); //创建监听实例
 httpFiledownload.Prefixes.Add("http://10.0.0.217:20009/FileManageApi/Download/"); //添加监听地址 注意是以/结尾。
 httpFiledownload.Start(); //允许该监听地址接受请求的传入。
 Thread ThreadhttpFiledownload = new Thread(new ThreadStart(GethttpFiledownload)); //创建开启一个线程监听该地址得请求
 ThreadhttpFiledownload.Start();

 httOtherRequest = new HttpListener();
 httOtherRequest.Prefixes.Add("http://10.0.0.217:20009/BehaviorApi/EmailSend/"); //添加监听地址 注意是以/结尾。
 httOtherRequest.Start(); //允许该监听地址接受请求的传入。
 Thread ThreadhttOtherRequest = new Thread(new ThreadStart(GethttOtherRequest));
 ThreadhttOtherRequest.Start();
 }

 /// <summary>
 /// 执行文件下载处理请求监听行为
 /// </summary>
 public static void GethttpFiledownload()
 {
 while (true)
 {
 HttpListenerContext requestContext = httpFiledownload.GetContext(); //接受到新的请求
 try
 {
 //reecontext 为开启线程传入的 requestContext请求对象
 Thread subthread = new Thread(new ParameterizedThreadStart((reecontext) => 
 {
 Console.WriteLine("执行文件处理请求监听行为");

 var request = (HttpListenerContext)reecontext;
 var image = HttpUtility.UrlDecode(request.Request.QueryString["imgname"]); //接受GET请求过来的参数；
 string filepath = AppDomain.CurrentDomain.BaseDirectory + image;
 if (!File.Exists(filepath))
 {
 filepath = AppDomain.CurrentDomain.BaseDirectory + "default.jpg"; //下载默认图片
 }
 using (FileStream fs = new FileStream(filepath, FileMode.Open, FileAccess.Read))
 {
 byte[] buffer = new byte[fs.Length];
 fs.Read(buffer, 0, (int)fs.Length); //将文件读到缓存区
 request.Response.StatusCode = 200;
 request.Response.Headers.Add("Access-Control-Allow-Origin", "*");
 request.Response.ContentType = "image/jpg"; 
 request.Response.ContentLength = buffer.Length;
 var output = request.Response.OutputStream; //获取请求流
 output.Write(buffer, 0, buffer.Length); //将缓存区的字节数写入当前请求流返回
 output.Close();
 }
 }));
 subthread.Start(requestContext); //开启处理线程处理下载文件
 }
 catch (Exception ex)
 {
 try
 {
 requestContext.Response.StatusCode = 500;
 requestContext.Response.ContentType = "application/text";
 requestContext.Response.ContentEncoding = Encoding.UTF8;
 byte[] buffer = System.Text.Encoding.UTF8.GetBytes("System Error");
 //对客户端

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace HttpListenerApp
{
 class Program
 {
 static void Main(string[] args)
 {
 //开启请求监听
 HttpProvider.Init();
 }
 }
}