如何截取Http请求

1：前言

本篇文章比较短，主要是因为我的一个随想产生的一段代码。这段代码的功能你可以叫做是简单的Http服务器也可以叫做Http请求截取。它实现的功能就是截取Http请求然后自己做处理。

2：代码

    public class HttpServer : IDisposable
    {

        private HttpListener listener;

        public void Start()
        {
            listener = new HttpListener();
            listener.Prefixes.Add("http://localhost/");

            listener.AuthenticationSchemes = AuthenticationSchemes.IntegratedWindowsAuthentication | AuthenticationSchemes.Anonymous;

            listener.Start();
            listener.BeginGetContext(GetContext, null);
        }

        private void GetContext(IAsyncResult ar)
        {
            HttpListenerRequest Request;
            HttpListenerResponse Response;

            try
            {
                HttpListenerContext ctx = listener.EndGetContext(ar);
                Request = ctx.Request;
                Response = ctx.Response;

                //setup waiting for the next request
                listener.BeginGetContext(GetContext, null);
            }
            catch (InvalidOperationException)
            {
                return;
            }
            catch (HttpListenerException)
            {
                return;
            }

            try
            {
                var sw = new StreamWriter(Response.OutputStream);
                sw.Write(@"<html><body><p>你的请求已经被截取</p></body></html>");
                sw.Flush();
            }
            finally
            {
                Response.OutputStream.Flush();
                Response.Close();
            }

        }

        public void Dispose()
        {
            if (listener != null)
                listener.Stop();
        }
    }