HttpHelps类，用来实现Http访问，Post或者Get方式的，代码,CSharp代码库,德仔网

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【CSharp】 HttpHelps类，用来实现Http访问，Post或者Get方式的，
作者:天楚 / 发布于2015/10/8/ 1355
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

	<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, 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))
	 {
	 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 = 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)
	 {
	 #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 == 0)
	 {
	 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, 0, buffer.Length);
	 }
	 #endregion

	 //设置最大连接
	 if (objhttpItem.Connectionlimit > 0)
	 {
	 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 = 100000;
	 /// <summary>
	 /// 默认请求超时时间
	 /// </summary>
	 public int Timeout
	 {
	 get { return _Timeout; }
	 set { _Timeout = value; }
	 }

	 int _ReadWriteTimeout = 30000;
	 /// <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 = 1024;
	 /// <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>
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