C# HttpHelper 1.0正式版发布

下载地址：http://www.sufeinet.com/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.sufeinet.com/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; }
        }
    }
}