原文地址：http://blog.csdn.net/cdefg198/article/details/8315438
万能框架：http://www.sufeinet.com/forum.php?mod=viewthread&tid=2002
<span style="font-family:Microsoft YaHei;">/// <summary>
/// 类说明：HttpHelps类，用来实现Http访问，Post或者Get方式的，直接访问，带Cookie的，带证书的等方式，可以设置代理
/// 编码日期：2011-09-20
/// 编 码 人：苏飞
/// 联系方式：361983679
/// 更新网址：http://www.cckan.net/thread-3-1-1.html
/// 修改日期：2012-12-09
/// </summary> using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.IO;
using System.Text.RegularExpressions;
using System.IO.Compression;
using System.Security.Cryptography.X509Certificates;
using System.Net.Security; namespace DotNet.Utilities
{
/// <summary>
/// Http连接操作帮助类
/// <example>
/// 下面是个例子大家可以看一下
///
/// HttpHelper http = new HttpHelper();
/// HttpItem item = new HttpItem()
/// {
/// URL = "http://www.cckan.net",//URL 必需项
/// Encoding = "gbk",//编码格式（utf-8,gb2312,gbk） 可选项 默认类会自动识别
/// Method = "get",//URL 可选项 默认为Get
/// //Timeout = 100000,//连接超时时间 可选项默认为100000
/// //ReadWriteTimeout = 30000,//写入Post数据超时时间 可选项默认为30000
/// //IsToLower = false,//得到的HTML代码是否转成小写 可选项默认转小写
/// Cookie = "",//字符串Cookie 可选项
/// // UserAgent = "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)",//用户的浏览器类型，版本，操作系统 可选项有默认值
/// // Accept = "text/html, application/xhtml+xml, */*",// 可选项有默认值
/// // ContentType = "text/html",//返回类型 可选项有默认值
/// Referer = "http://www.cckan.net",//来源URL 可选项
/// //Allowautoredirect = true,//是否根据３０１跳转 可选项
/// //CerPath = "d:\\123.cer",//证书绝对路径 可选项不需要证书时可以不写这个参数
/// //Connectionlimit = 1024,//最大连接数 可选项 默认为1024
/// //Postdata = "username=sufei&pwd=cckan.net",//Post数据 可选项GET时不需要写
/// //ProxyIp = "192.168.1.105",//代理服务器ID 可选项 不需要代理 时可以不设置这三个参数
/// //ProxyPwd = "123456",//代理服务器密码 可选项
/// // ProxyUserName = "administrator",//代理服务器账户名 可选项
/// };
/// //得到HTML代码
/// string html = http.GetHtml(item);
///
/// //取出返回的Cookie
/// string cookie = item.Cookie;
/// //取出返回的Request
/// HttpWebRequest request = item.Request;
/// //取出返回的Response
/// HttpWebResponse response = item.Response;
/// //取出返回的Reader
/// StreamReader reader = item.Reader;
/// //取出返回的Headers
/// WebHeaderCollection header = response.Headers;
/// </example>
/// </summary>
public class HttpHelper
{
#region 预定义方法或者变更 //默认的编码
private Encoding encoding = Encoding.Default;
//HttpWebRequest对象用来发起请求
private HttpWebRequest request = null;
//获取影响流的数据对象
private HttpWebResponse response = null;
//读取流的对象
private StreamReader reader = null;
//需要返回的数据对象
private string returnData = "String Error"; /// <summary>
/// 根据相传入的数据，得到相应页面数据
/// </summary>
/// <param name="strPostdata">传入的数据Post方式,get方式传NUll或者空字符串都可以</param>
/// <returns>string类型的响应数据</returns>
private string GetHttpRequestData(HttpItem objhttpitem)
{
try
{
#region 得到请求的response using (response = (HttpWebResponse)request.GetResponse())
{
if (response.Cookies != null)
{
objhttpitem.CookieCollection = response.Cookies;
}
if (response.Headers["set-cookie"] != null)
{
objhttpitem.Cookie = response.Headers["set-cookie"];
} objhttpitem.Response = response;
objhttpitem.Request = request;
//从这里开始我们要无视编码了
if (encoding == null)
{
MemoryStream _stream = new MemoryStream();
if (response.ContentEncoding != null && response.ContentEncoding.Equals("gzip", StringComparison.InvariantCultureIgnoreCase))
{
objhttpitem.Reader = reader;
//开始读取流并设置编码方式
//new GZipStream(response.GetResponseStream(), CompressionMode.Decompress).CopyTo(_stream, 10240);
//.net4.0以下写法
_stream = GetMemoryStream(response.GetResponseStream());
}
else
{
objhttpitem.Reader = reader;
//response.GetResponseStream().CopyTo(_stream, 10240);
// .net4.0以下写法
_stream = GetMemoryStream(response.GetResponseStream());
}
byte[] RawResponse = _stream.ToArray();
string temp = Encoding.Default.GetString(RawResponse, , RawResponse.Length);
//<meta(.*?)charset([\s]?)=[^>](.*?)>
Match meta = Regex.Match(temp, "<meta([^<]*)charset=([^<]*)[\"']", RegexOptions.IgnoreCase | RegexOptions.Multiline);
string charter = (meta.Groups.Count > ) ? meta.Groups[].Value : string.Empty;
charter = charter.Replace("\"", string.Empty).Replace("'", string.Empty).Replace(";", string.Empty);
if (charter.Length > )
{
charter = charter.ToLower().Replace("iso-8859-1", "gbk");
encoding = Encoding.GetEncoding(charter);
}
else
{
if (response.CharacterSet.ToLower().Trim() == "iso-8859-1")
{
encoding = Encoding.GetEncoding("gbk");
}
else
{
if (string.IsNullOrEmpty(response.CharacterSet.Trim()))
{
encoding = Encoding.UTF8;
}
else
{
encoding = Encoding.GetEncoding(response.CharacterSet);
}
}
}
returnData = encoding.GetString(RawResponse);
}
else
{
if (response.ContentEncoding != null && response.ContentEncoding.Equals("gzip", StringComparison.InvariantCultureIgnoreCase))
{
//开始读取流并设置编码方式
using (reader = new StreamReader(new GZipStream(response.GetResponseStream(), CompressionMode.Decompress), encoding))
{
objhttpitem.Reader = reader;
returnData = reader.ReadToEnd(); }
}
else
{
//开始读取流并设置编码方式
using (reader = new StreamReader(response.GetResponseStream(), encoding))
{
objhttpitem.Reader = reader;
returnData = reader.ReadToEnd();
}
}
}
} #endregion
}
catch (WebException ex)
{
//这里是在发生异常时返回的错误信息
returnData = "String Error";
response = (HttpWebResponse)ex.Response;
objhttpitem.Response = response;
}
if (objhttpitem.IsToLower)
{
returnData = returnData.ToLower();
}
return returnData;
} /// <summary>
/// 4.0以下.net版本取数据使用
/// </summary>
/// <param name="streamResponse">流</param>
private static MemoryStream GetMemoryStream(Stream streamResponse)
{
MemoryStream _stream = new MemoryStream();
int Length = ;
Byte[] buffer = new Byte[Length];
int bytesRead = streamResponse.Read(buffer, , Length);
// write the required bytes
while (bytesRead > )
{
_stream.Write(buffer, , bytesRead);
bytesRead = streamResponse.Read(buffer, , Length);
}
return _stream;
} /// <summary>
/// 为请求准备参数
/// </summary>
///<param name="objhttpItem">参数列表</param>
/// <param name="_Encoding">读取数据时的编码方式</param>
private void SetRequest(HttpItem objhttpItem)
{
#region 验证证书 if (!string.IsNullOrEmpty(objhttpItem.CerPath))
{
//这一句一定要写在创建连接的前面。使用回调的方法进行证书验证。
ServicePointManager.ServerCertificateValidationCallback =
new System.Net.Security.RemoteCertificateValidationCallback(CheckValidationResult); //初始化对像，并设置请求的URL地址
request = (HttpWebRequest)WebRequest.Create(GetUrl(objhttpItem.URL));
//创建证书文件
X509Certificate objx509 = new X509Certificate(objhttpItem.CerPath);
//添加到请求里
request.ClientCertificates.Add(objx509);
}
else
{
//初始化对像，并设置请求的URL地址
request = (HttpWebRequest)WebRequest.Create(GetUrl(objhttpItem.URL));
}
#endregion #region 设置代理
if (string.IsNullOrEmpty(objhttpItem.ProxyUserName) && string.IsNullOrEmpty(objhttpItem.ProxyPwd) && string.IsNullOrEmpty(objhttpItem.ProxyIp))
{
//不需要设置
}
else
{
//设置代理服务器
WebProxy myProxy = new WebProxy(objhttpItem.ProxyIp, false);
//建议连接
myProxy.Credentials = new NetworkCredential(objhttpItem.ProxyUserName, objhttpItem.ProxyPwd);
//给当前请求对象
request.Proxy = myProxy;
//设置安全凭证
request.Credentials = CredentialCache.DefaultNetworkCredentials;
}
#endregion //请求方式Get或者Post
request.Method = objhttpItem.Method;
request.Timeout = objhttpItem.Timeout;
request.ReadWriteTimeout = objhttpItem.ReadWriteTimeout;
//Accept
request.Accept = objhttpItem.Accept;
//ContentType返回类型
request.ContentType = objhttpItem.ContentType;
//UserAgent客户端的访问类型，包括浏览器版本和操作系统信息
request.UserAgent = objhttpItem.UserAgent; #region 编码
if (string.IsNullOrEmpty(objhttpItem.Encoding) || objhttpItem.Encoding.ToLower().Trim() == "null")
{
//读取数据时的编码方式
encoding = null;
}
else
{
//读取数据时的编码方式
encoding = System.Text.Encoding.GetEncoding(objhttpItem.Encoding);
}
#endregion #region Cookie
if (!string.IsNullOrEmpty(objhttpItem.Cookie))
{
//Cookie
request.Headers[HttpRequestHeader.Cookie] = objhttpItem.Cookie;
} //设置Cookie
if (objhttpItem.CookieCollection != null)
{
if (request.CookieContainer.Count == )
{
request.CookieContainer.Add(objhttpItem.CookieCollection);
}
else
{
request.CookieContainer = new CookieContainer();
request.CookieContainer.Add(objhttpItem.CookieCollection);
}
}
#endregion //来源地址
request.Referer = objhttpItem.Referer;
//是否执行跳转功能
request.AllowAutoRedirect = objhttpItem.Allowautoredirect; #region Post数据
//验证在得到结果时是否有传入数据
if (!string.IsNullOrEmpty(objhttpItem.Postdata) && request.Method.Trim().ToLower().Contains("post"))
{
byte[] buffer = Encoding.Default.GetBytes(objhttpItem.Postdata);
request.ContentLength = buffer.Length;
request.GetRequestStream().Write(buffer, , buffer.Length);
}
#endregion //设置最大连接
if (objhttpItem.Connectionlimit > )
{
request.ServicePoint.ConnectionLimit = objhttpItem.Connectionlimit;
}
} //回调验证证书问题
public bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
{
// 总是接受
return true;
} #endregion #region 普通类型 /// <summary>
/// 传入一个正确或不正确的URl，返回正确的URL
/// </summary>
/// <param name="URL">url</param>
/// <returns>
/// </returns>
public static string GetUrl(string URL)
{
if (!(URL.Contains("http://") || URL.Contains("https://")))
{
URL = "http://" + URL;
}
return URL;
} ///<summary>
///采用https协议访问网络,根据传入的URl地址，得到响应的数据字符串。
///</summary>
///<param name="objhttpItem">参数列表</param>
///<returns>String类型的数据</returns>
public string GetHtml(HttpItem objhttpItem)
{
//准备参数
SetRequest(objhttpItem); //调用专门读取数据的类
return GetHttpRequestData(objhttpItem);
}
#endregion
} /// <summary>
/// Http请求参考类
/// </summary>
public class HttpItem
{
string _URL;
/// <summary>
/// 请求URL必须填写
/// </summary>
public string URL
{
get { return _URL; }
set { _URL = value; }
} string _Method = "GET";
/// <summary>
/// 请求方式默认为GET方式
/// </summary>
public string Method
{
get { return _Method; }
set { _Method = value; }
} int _Timeout = ;
/// <summary>
/// 默认请求超时时间
/// </summary>
public int Timeout
{
get { return _Timeout; }
set { _Timeout = value; }
} int _ReadWriteTimeout = ;
/// <summary>
/// 默认写入Post数据超时间
/// </summary>
public int ReadWriteTimeout
{
get { return _ReadWriteTimeout; }
set { _ReadWriteTimeout = value; }
} string _Accept = "text/html, application/xhtml+xml, */*";
/// <summary>
/// 请求标头值 默认为text/html, application/xhtml+xml, */*
/// </summary>
public string Accept
{
get { return _Accept; }
set { _Accept = value; }
} string _ContentType = "text/html";
/// <summary>
/// 请求返回类型默认 text/html
/// </summary>
public string ContentType
{
get { return _ContentType; }
set { _ContentType = value; }
} string _UserAgent = "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)";
/// <summary>
/// 客户端访问信息默认Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)
/// </summary>
public string UserAgent
{
get { return _UserAgent; }
set { _UserAgent = value; }
} string _Encoding = string.Empty;
/// <summary>
/// 返回数据编码默认为NUll,可以自动识别
/// </summary>
public string Encoding
{
get { return _Encoding; }
set { _Encoding = value; }
} string _Postdata;
/// <summary>
/// Post请求时要发送的Post数据
/// </summary>
public string Postdata
{
get { return _Postdata; }
set { _Postdata = value; }
} string _Cookie = string.Empty;
/// <summary>
/// 请求时的Cookie
/// </summary>
public string Cookie
{
get { return _Cookie; }
set { _Cookie = value; }
} string _Referer = string.Empty;
/// <summary>
/// 来源地址，上次访问地址
/// </summary>
public string Referer
{
get { return _Referer; }
set { _Referer = value; }
} string _CerPath = string.Empty;
/// <summary>
/// 证书绝对路径
/// </summary>
public string CerPath
{
get { return _CerPath; }
set { _CerPath = value; }
} CookieCollection cookiecollection = null;
/// <summary>
/// Cookie对象集合
/// </summary>
public CookieCollection CookieCollection
{
get { return cookiecollection; }
set { cookiecollection = value; }
} private HttpWebRequest request = null;
/// <summary>
/// HttpWebRequest对象用来发起请求
/// </summary>
public HttpWebRequest Request
{
get { return request; }
set { request = value; }
} private HttpWebResponse response = null;
/// <summary>
/// 获取影响流的数据对象
/// </summary>
public HttpWebResponse Response
{
get { return response; }
set { response = value; }
} private Boolean isToLower = true;
/// <summary>
/// 是否设置为全文小写
/// </summary>
public Boolean IsToLower
{
get { return isToLower; }
set { isToLower = value; }
} private StreamReader reader = null;
/// <summary>
/// 读取流的对象
/// </summary>
public StreamReader Reader
{
get { return reader; }
set { reader = value; }
} private Boolean allowautoredirect = true;
/// <summary>
/// 支持跳转页面，查询结果将是跳转后的页面
/// </summary>
public Boolean Allowautoredirect
{
get { return allowautoredirect; }
set { allowautoredirect = value; }
} private int connectionlimit = ;
/// <summary>
/// 最大连接数
/// </summary>
public int Connectionlimit
{
get { return connectionlimit; }
set { connectionlimit = value; }
} private string proxyusername = string.Empty;
/// <summary>
/// 代理Proxy 服务器用户名
/// </summary>
public string ProxyUserName
{
get { return proxyusername; }
set { proxyusername = value; }
} private string proxypwd = string.Empty;
/// <summary>
/// 代理 服务器密码
/// </summary>
public string ProxyPwd
{
get { return proxypwd; }
set { proxypwd = value; }
} private string proxyip = string.Empty;
/// <summary>
/// 代理 服务IP
/// </summary>
public string ProxyIp
{
get { return proxyip; }
set { proxyip = value; }
}
}
}</span>