C# HttpHelper 1.0正式版发布

下载地址：http://www.cckan.net/thread-3-1-1.html

欢迎大家使用，写了这么久终于可以发布一个版本了。大家快下载试试吧。

功能说明：

1.实现常规的POST和GET请求。

2.实现了可设置编码与无视编码功能，可以自动解析编码。

3.实现了Cookie携带功能。

4.实现了代理请求功能

5.更多的例子请大家到我博客查看

原文地址： http://www.cckan.net/thread-403-1-1.html

发一部分代码给大家看吧

/// <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  Blogs：http://www.cckan.net
/// 修改日期：2012-09-20
/// </summary>

using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.IO;
using System.Text.RegularExpressions;
using System.IO.Compression;

namespace ImportZhiLian.FunctionServices
{
public class httphelper
{
#region 预定义方法或者变更

//默认的编码
public Encoding encoding = Encoding.Default;
//HttpWebRequest对象用来发起请求
public HttpWebRequest request = null;
//获取影响流的数据对象
private HttpWebResponse response = null;
//返回的Cookie
public string cookie = "";
//是否设置为全文小写
public Boolean isToLower = true;
//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(string strPostdata)
{
try
{
//支持跳转页面，查询结果将是跳转后的页面
request.AllowAutoRedirect = true;

//验证在得到结果时是否有传入数据
if (!string.IsNullOrEmpty(strPostdata) && request.Method.Trim().ToLower().Contains("post"))
{
byte[] buffer = encoding.GetBytes(strPostdata);
request.ContentLength = buffer.Length;
request.GetRequestStream().Write(buffer, 0, buffer.Length);
}

////最大连接数
//request.ServicePoint.ConnectionLimit = 1024;

#region 得到请求的response

using (response = (HttpWebResponse)request.GetResponse())
{
try
{
cookie = response.Headers["set-cookie"].ToString();
}
catch (Exception)
{

}
//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))
{
//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
{
//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, 0, RawResponse.Length);
//<meta(.*?)charset([\s]?)=[^>](.*?)>
Match meta = Regex.Match(temp, "<meta([^<]*)charset=([^<]*)[\"']", RegexOptions.IgnoreCase | RegexOptions.Multiline);
string charter = (meta.Groups.Count > 2) ? meta.Groups[2].Value : string.Empty;
charter = charter.Replace("\"", string.Empty).Replace("'", string.Empty).Replace(";", string.Empty);
if (charter.Length > 0)
{
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))
{
returnData = reader.ReadToEnd();
}
}
else
{
//开始读取流并设置编码方式
using (reader = new StreamReader(response.GetResponseStream(), encoding))
{
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;
}
if (isToLower)
{
returnData = returnData.ToLower();
}
return returnData;
}

/// <summary>
/// 4.0以下.net版本取水运
/// </summary>
/// <param name="streamResponse"></param>
private static MemoryStream GetMemoryStream(Stream streamResponse)
{
MemoryStream _stream = new MemoryStream();
int Length = 256;
Byte[] buffer = new Byte[Length];
int bytesRead = streamResponse.Read(buffer, 0, Length);
// write the required bytes
while (bytesRead > 0)
{
_stream.Write(buffer, 0, bytesRead);
bytesRead = streamResponse.Read(buffer, 0, 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)
{
//初始化对像，并设置请求的URL地址
request = (HttpWebRequest)WebRequest.Create(GetUrl(objhttpItem.URL));
//请求方式Get或者Post
request.Method = objhttpItem.Method;
//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;
if (objhttpItem.Encoding == "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);
}
//Cookie
request.Headers[HttpRequestHeader.Cookie] = objhttpItem.Cookie;
//来源地址
request.Referer = objhttpItem.Referer;
}

/// <summary>
/// 设置当前访问使用的代理
/// </summary>
/// <param name="userName">代理 服务器用户名</param>
/// <param name="passWord">代理 服务器密码</param>
/// <param name="ip">代理 服务器地址</param>
public void SetWebProxy(string userName, string passWord, string ip)
{
//设置代理服务器
WebProxy myProxy = new WebProxy(ip, false);
//建议连接
myProxy.Credentials = new NetworkCredential(userName, passWord);
//给当前请求对象
request.Proxy = myProxy;
//设置安全凭证
request.Credentials = CredentialCache.DefaultNetworkCredentials;
}

#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.Postdata);
}
#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; }
}

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 = "NULL";
/// <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;
/// <summary>
/// 请求时的Cookie
/// </summary>
public string Cookie
{
get { return _Cookie; }
set { _Cookie = value; }
}

string _Referer;
/// <summary>
/// 来源地址，上次访问地址
/// </summary>
public string Referer
{
get { return _Referer; }
set { _Referer = value; }
}
}
}