C# SOCKET GET/POST的实现

using System;using System.Net.Sockets;using System.Text;namespace ConsoleApplication1{class WebToolkit{/// <summary>/// Url结构/// </summary>struct UrlInfo{public string Host;public int Port;public string File;public string Body;}/// <summary>/// 解析URL/// </summary>/// <param name="url"></param>/// <returns></returns>private static UrlInfo ParseURL(string url){UrlInfo urlInfo = new UrlInfo();string[] strTemp = null;urlInfo.Host = "";urlInfo.Port = 80;urlInfo.File = "/";urlInfo.Body = "";int intIndex = url.ToLower().IndexOf("http://");if (intIndex != -1){url = url.Substring(7);intIndex = url.IndexOf("/");if (intIndex == -1){urlInfo.Host = url;}else{urlInfo.Host = url.Substring(0, intIndex);url = url.Substring(intIndex);intIndex = urlInfo.Host.IndexOf(":");if (intIndex != -1){strTemp = urlInfo.Host.Split(':');urlInfo.Host = strTemp[0];int.TryParse(strTemp[1], out urlInfo.Port);}intIndex = url.IndexOf("?");if (intIndex == -1){urlInfo.File = url;}else{strTemp = url.Split('?');urlInfo.File = strTemp[0];urlInfo.Body = strTemp[1];}}}return urlInfo;}/// <summary>/// 发出请求并获取响应/// </summary>/// <param name="host"></param>/// <param name="port"></param>/// <param name="body"></param>/// <param name="encode"></param>/// <returns></returns>private static string GetResponse(string host, int port, string body, Encoding encode){string strResult = string.Empty;byte[] bteSend = Encoding.ASCII.GetBytes(body);byte[] bteReceive = new byte[1024];int intLen = 0;using (Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp)){try{socket.Connect(host, port);if (socket.Connected){socket.Send(bteSend, bteSend.Length, 0);while ((intLen = socket.Receive(bteReceive, bteReceive.Length, 0)) > 0){strResult += encode.GetString(bteReceive, 0, intLen);}}socket.Close();}catch { }}return strResult;}/// <summary>/// GET请求/// </summary>/// <param name="url"></param>/// <param name="encode"></param>/// <returns></returns>public static string Get(string url, Encoding encode){UrlInfo urlInfo = ParseURL(url);string strRequest = string.Format("GET {0}?{1} HTTP/1.1\r\nHost:{2}:{3}\r\nConnection:Close\r\n\r\n", urlInfo.File, urlInfo.Body, urlInfo.Host, urlInfo.Port.ToString());return GetResponse(urlInfo.Host, urlInfo.Port, strRequest, encode);}/// <summary>/// POST请求/// </summary>/// <param name="url"></param>/// <param name="encode"></param>/// <returns></returns>public static string Post(string url, Encoding encode){UrlInfo urlInfo = ParseURL(url);string strRequest = string.Format("POST {0} HTTP/1.1\r\nHost:{1}:{2}\r\nContent-Length:{3}\r\nContent-Type:application/x-www-form-urlencoded\r\nConnection:Close\r\n\r\n{4}", urlInfo.File, urlInfo.Host, urlInfo.Port.ToString(), urlInfo.Body.Length, urlInfo.Body);return GetResponse(urlInfo.Host, urlInfo.Port, strRequest, encode);}}} 

```using System;using System.Text;namespace ConsoleApplication1{//调用示例class Program{public static void Main(string[] args){Console.WriteLine(WebToolkit.Get("http://www.jb51.net/t.asp?keyword=vbscript", Encoding.Default));Console.ReadKey();}}}