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C#基于socket模拟http请求的方法

2015-06-29 15:43 1561 查看

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。

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标签： C# socket http

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