HttpWebRequest后台读取网页类

using System;
using System.Linq;
using System.Collections.Generic;
using System.Web;
using System.Configuration;
using System.Net;
using System.IO;
using System.Text;
using System.Net.Security;
using System.Security.Authentication;
using System.Security.Cryptography.X509Certificates;

/// <summary>
/// 后台读取网页类，使用WebRequest对象
/// </summary>
public class RemoteWeb
{

/// <summary>
/// WebRequestPOST方式读取远程数据
/// </summary>
/// <param name="_url">远程请求地址，需要加参数。</param>
/// <param name="_remoteEncoding">远程编码</param>
/// <returns>编码为UTF-8的字符串</returns>
public static string Post(string _url, Encoding _remoteEncoding)
{

// 发送数据
Encoding utf8 = System.Text.Encoding.UTF8;

byte[] a = utf8.GetBytes(_url.Split('?')[1]);
byte[] data = Encoding.Convert(utf8, _remoteEncoding, a);
if (_remoteEncoding == System.Text.Encoding.UTF8)
{
data = null;
data = a;
}
//byte[] data = _remoteEncoding.GetBytes(_url.Split('?')[1]);

//System.IO.File.WriteAllText(@"e:\temp\ali2.txt", utf8.GetString(data));

Uri url = new Uri(_url.Split('?')[0]);
HttpWebRequest req = HttpWebRequest.Create(url) as HttpWebRequest;
//设置超时

/* 财付通证书 */
//X509Store store = new X509Store("Root", StoreLocation.LocalMachine);
//store.Open(OpenFlags.ReadOnly | OpenFlags.OpenExistingOnly);
//X509Certificate2 cer = store.Certificates.Find(X509FindType.FindBySubjectName, "1204816901", false)[0];

//验证服务器证书回调自动验证 SSL
if (_url.Split('?')[0].Substring(0, 5) == "https")
{
ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(RemoteWeb.CheckValidationResult);
}
// 证书
if (_url.Split('?')[0].Substring(0, 5) == "https" && _url.Split('?')[0].IndexOf("tenpay.com") != -1)
{
req.ClientCertificates.Add(new X509Certificate2("e:/webroot/cer/1204816901_20100716110715.pfx", "1204816901"));
}

req.Timeout = 30000;
req.AllowAutoRedirect = true;
req.KeepAlive = true;
req.Method = "POST";
req.ContentType = "application/x-www-form-urlencoded";
req.ContentLength = data.Length;
//req.EnableSsl = true;
Stream stream = req.GetRequestStream();

stream.Write(data, 0, data.Length);
stream.Close();

HttpWebResponse rep = req.GetResponse() as HttpWebResponse;
Stream receiveStream = rep.GetResponseStream();// Pipes the stream to a higher level stream reader with the required encoding format.
StreamReader readStream = new StreamReader(receiveStream, _remoteEncoding);

Char[] read = new Char[256];
int count = readStream.Read(read, 0, 256);
StringBuilder sb = new StringBuilder("");
while (count > 0)
{
String readstr = new String(read, 0, count);
sb.Append(readstr);
count = readStream.Read(read, 0, 256);
}

rep.Close();
receiveStream.Close();
readStream.Close();
req = null;
stream = null;
receiveStream = null;

byte[] c = _remoteEncoding.GetBytes(sb.ToString());
byte[] d = Encoding.Convert(_remoteEncoding, utf8, c);
return utf8.GetString(d);
}

/// <summary>
/// WebRequestPOST方式读取远程数据(GB2312专用)
/// </summary>
/// <param name="_url">远程请求地址，需要加参数。</param>
/// <returns>编码为UTF-8的字符串</returns>
public static string PostGB2312(string _url)
{

// 发送数据
Encoding utf8 = System.Text.Encoding.UTF8;

byte[] data = System.Text.Encoding.GetEncoding("gb2312").GetBytes(_url.Split('?')[1]);

//System.IO.File.WriteAllText(@"e:\temp\ali2.txt", utf8.GetString(data));

Uri url = new Uri(_url.Split('?')[0]);
HttpWebRequest req = HttpWebRequest.Create(url) as HttpWebRequest;
//设置超时

/* 财付通证书 */
//X509Store store = new X509Store("Root", StoreLocation.LocalMachine);
//store.Open(OpenFlags.ReadOnly | OpenFlags.OpenExistingOnly);
//X509Certificate2 cer = store.Certificates.Find(X509FindType.FindBySubjectName, "1204816901", false)[0];

//验证服务器证书回调自动验证 SSL
if (_url.Split('?')[0].Substring(0, 5) == "https")
{
ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(RemoteWeb.CheckValidationResult);
}

if (_url.Split('?')[0].Substring(0, 5) == "https" && _url.Split('?')[0].IndexOf("tenpay.com") != -1)
{
req.ClientCertificates.Add(new X509Certificate2("e:/webroot/cer/1204816901_20100716110715.pfx", "1204816901"));
}

req.Timeout = 30000;
req.AllowAutoRedirect = true;
req.KeepAlive = true;
req.Method = "POST";
req.ContentType = "application/x-www-form-urlencoded";
req.ContentLength = data.Length;
//req.EnableSsl = true;
Stream stream = req.GetRequestStream();

stream.Write(data, 0, data.Length);
stream.Close();

HttpWebResponse rep = req.GetResponse() as HttpWebResponse;
Stream receiveStream = rep.GetResponseStream();// Pipes the stream to a higher level stream reader with the required encoding format.
StreamReader readStream = new StreamReader(receiveStream, System.Text.Encoding.GetEncoding("gb2312"));

Char[] read = new Char[256];
int count = readStream.Read(read, 0, 256);
StringBuilder sb = new StringBuilder("");
while (count > 0)
{
String readstr = new String(read, 0, count);
sb.Append(readstr);
count = readStream.Read(read, 0, 256);
}

rep.Close();
receiveStream.Close();
readStream.Close();
req = null;
stream = null;
receiveStream = null;

byte[] c = System.Text.Encoding.GetEncoding("gb2312").GetBytes(sb.ToString());
byte[] d = Encoding.Convert(System.Text.Encoding.GetEncoding("gb2312"), utf8, c);
return utf8.GetString(d);
}

/// <summary>
/// WebRequestPOST方式读取远程数据(GBK专用)
/// </summary>
/// <param name="_url">远程请求地址，需要加参数。</param>
/// <returns>编码为UTF-8的字符串</returns>
public static string PostGBK(string _url)
{

// 发送数据
Encoding utf8 = System.Text.Encoding.UTF8;

byte[] data = System.Text.Encoding.GetEncoding("GBK").GetBytes(_url.Split('?')[1]);

//System.IO.File.WriteAllText(@"e:\temp\ali2.txt", utf8.GetString(data));

Uri url = new Uri(_url.Split('?')[0]);
HttpWebRequest req = HttpWebRequest.Create(url) as HttpWebRequest;
//设置超时

/* 财付通证书 */
//X509Store store = new X509Store("Root", StoreLocation.LocalMachine);
//store.Open(OpenFlags.ReadOnly | OpenFlags.OpenExistingOnly);
//X509Certificate2 cer = store.Certificates.Find(X509FindType.FindBySubjectName, "1204816901", false)[0];

//验证服务器证书回调自动验证 SSL
if (_url.Split('?')[0].Substring(0, 5) == "https")
{
ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(RemoteWeb.CheckValidationResult);
}

if (_url.Split('?')[0].Substring(0, 5) == "https" && _url.Split('?')[0].IndexOf("tenpay.com") != -1)
{
req.ClientCertificates.Add(new X509Certificate2("e:/webroot/cer/1204816901_20100716110715.pfx", "1204816901"));
}

req.Timeout = 30000;
req.AllowAutoRedirect = true;
req.KeepAlive = true;
req.Method = "POST";
req.ContentType = "application/x-www-form-urlencoded";
req.ContentLength = data.Length;
//req.EnableSsl = true;
Stream stream = req.GetRequestStream();

stream.Write(data, 0, data.Length);
stream.Close();

HttpWebResponse rep = req.GetResponse() as HttpWebResponse;
Stream receiveStream = rep.GetResponseStream();// Pipes the stream to a higher level stream reader with the required encoding format.
StreamReader readStream = new StreamReader(receiveStream, System.Text.Encoding.GetEncoding("gb2312"));

Char[] read = new Char[256];
int count = readStream.Read(read, 0, 256);
StringBuilder sb = new StringBuilder("");
while (count > 0)
{
String readstr = new String(read, 0, count);
sb.Append(readstr);
count = readStream.Read(read, 0, 256);
}

rep.Close();
receiveStream.Close();
readStream.Close();
req = null;
stream = null;
receiveStream = null;

byte[] c = System.Text.Encoding.GetEncoding("GBK").GetBytes(sb.ToString());
byte[] d = Encoding.Convert(System.Text.Encoding.GetEncoding("GBK"), utf8, c);
return utf8.GetString(d);
}

public static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
{ // Always accept
return true;
}

/// <summary>
/// WebRequestGET方式读取远程数据，默认超时30秒
/// </summary>
/// <param name="_url">远程请求地址，需要加参数。无参数可随意加一个。</param>
/// <param name="_remoteEncoding">远程编码</param>
/// <returns>编码为UTF-8的字符串</returns>
public static string GET(string _url, Encoding _remoteEncoding)
{
return GET(_url, _remoteEncoding, 30000);
}

/// <summary>
/// WebRequestGET方式读取远程数据，自定超时时间
/// </summary>
/// <param name="_url">远程请求地址，需要加参数。无参数可随意加一个。</param>
/// <param name="_remoteEncoding">远程编码</param>
/// <param name="_Timeout">超时秒数</param>
/// <returns>编码为UTF-8的字符串</returns>
public static string GET(string _url, Encoding _remoteEncoding, int _Timeout)
{
Encoding utf8 = System.Text.Encoding.UTF8;

//设置超时
HttpWebRequest req;
req = (HttpWebRequest)WebRequest.Create(_url);

req.Timeout = _Timeout;
req.Method = "GET";
req.ContentType = "application/x-www-form-urlencoded";

HttpWebResponse rep = (HttpWebResponse)req.GetResponse();
Stream receiveStream = rep.GetResponseStream();// Pipes the stream to a higher level stream reader with the required encoding format.
StreamReader readStream = new StreamReader(receiveStream, _remoteEncoding);

Char[] read = new Char[256];
int count = readStream.Read(read, 0, 256);
//Common.WriteTXT(@"e:\webroot\errors\length.txt", readStream.ReadToEnd().ToString());
StringBuilder sb = new StringBuilder("");
while (count > 0)
{
String readstr = new String(read, 0, count);
sb.Append(readstr);
count = readStream.Read(read, 0, 256);
}

rep.Close();
receiveStream.Close();
readStream.Close();
req = null;
receiveStream = null;

byte[] c = _remoteEncoding.GetBytes(sb.ToString());
byte[] d = Encoding.Convert(_remoteEncoding, utf8, c);
return utf8.GetString(d);
}
}