C#基于socket模拟http请求的方法

本文实例讲述了c#基于socket模拟http请求的方法。分享给大家供大家参考。具体实现方法如下：

using system;
using system.collections.generic;
using system.linq;
using system.net;
using system.net.sockets;
using system.text;
using system.threading.tasks;
class httphelper
{
  #region 模拟客户端socket连接
  private static socket connectsocket(string server, int port)
  {
   socket s = null;
   iphostentry hostentry = null;
   // get host related information.
   hostentry = dns.gethostentry(server);
   // loop through the addresslist to obtain the supported addressfamily. this is to avoid
   // an exception that occurs when the host ip address is not compatible with the address family
   // (typical in the ipv6 case).
   foreach (ipaddress address in hostentry.addresslist)
   {
    ipendpoint ipe = new ipendpoint(address, port);
    socket tempsocket =
    new socket(ipe.addressfamily, sockettype.stream, protocoltype.tcp);
    tempsocket.connect(ipe);
    if (tempsocket.connected)
    {
     s = tempsocket;
     break;
    }
    else
    {
     continue;
    }
   }
   return s;
  }
  #endregion
  #region 请求的主方法 request 是http请求的头部，可以用抓包工具获取,server可以使域名或者是ip地址，port http协议一般是80
  public static string socketsendreceive(string request, string server, int port)
  {
   try
   {
    byte[] bytessent = encoding.ascii.getbytes(request);
    byte[] bytesreceived = new byte[655350];
    // 创建连接
    socket s = connectsocket(server, port);
    if (s == null)
     return ("connection failed");
    // 发送内容.
    s.send(bytessent, bytessent.length, 0);
    // receive the server home page content.
    int bytes = 0;
    string page = "default html page on " + server + ":\r\n";
    //接受返回的内容.
    do
    {
     bytes = s.receive(bytesreceived, bytesreceived.length, 0);
     page = page + encoding.utf8.getstring(bytesreceived, 0, bytes);
    }
    while (bytes > 0);
 
    return page;
   }
   catch
   {
    return string.empty;
   }
  }
  #endregion
}

using system;
using system.collections.generic;
using system.io;
using system.linq;
using system.text;
using system.threading.tasks;
using system.reflection;
class program
{
  public static string headlerinit() {
   stringbuilder sb = new stringbuilder();
   sb.appendline("get http://www.baidu.com/ http/1.1");
   sb.appendline("host: www.baidu.com");
   sb.appendline("connection: keep-alive");
   sb.appendline("accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8");
   sb.appendline("user-agent: mozilla/5.0 (windows nt 6.1; wow64) applewebkit/537.36 (khtml, like gecko) chrome/42.0.2311.90 safari/537.36");
   sb.appendline("accept-encoding:deflate, sdch");
   sb.appendline("accept-language: zh-cn,zh;q=0.8");
   sb.appendline("\r\n");
   //这个一定要有不然接收回来可能没有数据
   return sb.tostring();
  }
  static void main(string[] args)
  {
   string getstrs=headlerinit();
   string gethtml = httphelper.socketsendreceive(getstrs, "www.baidu.com", 80);
   console.writeline(gethtml);
  }
}

希望本文所述对大家的c#程序设计有所帮助。