文章来自: http://sufei.cnblogs.com/
最新的HttpHeper类下载:
https://files.cnblogs.com/sufei/HttpHelps.zip (更新时间2011-12-07)
下载更新可能没有下面的类快,如果要使用最新版的就直接复制下面代码,下载我会抽空更新
之前我写过篇关于C# HttpWebRequest 绝技的文章 无视证书的方法请在篇文章里面查找谢谢,以下不做无视证书的方法
无论是Get还是Post 带Cookie,编码问题解决 ,这里完全做到了无视编码的问题
最近把上面的方法整理了一下,这个类相当于一个SqlHelper类一下,我把它叫做HttpHelper类,以后还会慢慢更新,希望大家多我支持,
给大家分享一下吧,不好的地方感谢大家留言指正,不多说了上代码吧!
/// <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
/// 编码日期:2011-08-20
/// 编 码 人: 苏飞
/// 联系方式:361983679 Email:sufei.1013@163.com Blogs:http://sufei.cnblogs.com
/// </summary>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;
using System.Text.RegularExpressions;
using System.IO.Compression;
public class HttpHelps
{
#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;
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())
{
//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="_URL">请求的URL地址</param>
/// <param name="_Method">请求方式Get或者Post</param>
/// <param name="_Accept">Accept</param>
/// <param name="_ContentType">ContentType返回类型</param>
/// <param name="_UserAgent">UserAgent客户端的访问类型,包括浏览器版本和操作系统信息</param>
/// <param name="_Encoding">读取数据时的编码方式</param>
private void SetRequest(string _URL, string _Method, string _Accept, string _ContentType, string _UserAgent, Encoding _Encoding)
{
//初始化对像,并设置请求的URL地址
request = (HttpWebRequest)WebRequest.Create(GetUrl(_URL));
//请求方式Get或者Post
request.Method = _Method;
//Accept
request.Accept = _Accept;
//ContentType返回类型
request.ContentType = _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 = _UserAgent;
//读取数据时的编码方式
encoding = _Encoding;
}
#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GET|POST方式访问网络,根据传入的URl地址,得到响应的数据字符串。
/// </summary>
/// <param name="_URL"></param>
/// <param name="_Method">请求方式Get或者Post</param>
/// <param name="_Accept">Accept</param>
/// <param name="_ContentType">ContentType返回类型</param>
/// <param name="_UserAgent">UserAgent客户端的访问类型,包括浏览器版本和操作系统信息</param>
/// <param name="_Encoding">读取数据时的编码方式</param>
/// <param name="_Postdata">只有_Method为Post方式时才需要传入值</param>
/// <returns>返回Html源代码</returns>
public string GetHttpRequestString(string _URL, string _Method, string _Accept, string _ContentType, string _UserAgent, Encoding _Encoding, string _Postdata)
{
//准备参数
SetRequest(_URL, _Method, _Accept, _ContentType, _UserAgent, _Encoding);
//调用专门读取数据的类
return GetHttpRequestData(_Postdata);
}
///<summary>
///采用https协议GET方式访问网络,根据传入的URl地址,得到响应的数据字符串。
///</summary>
///<param name="URL">url地址</param>
///<param name="objencoding">编码方式例如:System.Text.Encoding.UTF8;</param>
///<returns>String类型的数据</returns>
public string GetHttpRequestStringByNUll_Get(string URL, Encoding objencoding)
{
//准备参数
SetRequest(URL, "GET", "text/html, application/xhtml+xml, */*", "text/html", "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)", objencoding);
//调用专门读取数据的类
return GetHttpRequestData("");
}
///<summary>
///采用https协议GET方式访问网络,根据传入的URl地址,得到响应的数据字符串。
///</summary>
///<param name="URL">url地址</param>
///<param name="objencoding">编码方式例如:System.Text.Encoding.UTF8;</param>
///<param name="stgrcookie">Cookie字符串</param>
///<returns>String类型的数据</returns>
public string GetHttpRequestStringByNUll_GetBycookie(string URL, Encoding objencoding, string stgrcookie)
{
//准备参数
SetRequest(URL, "GET", "text/html, application/xhtml+xml, */*", "text/html", "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)", objencoding);
request.Headers[HttpRequestHeader.Cookie] = stgrcookie;
//调用专门读取数据的类
return GetHttpRequestData("");
}
///<summary>
///采用https协议GET方式访问网络,根据传入的URl地址,得到响应的数据字符串。
///</summary>
///<param name="URL">url地址</param>
///<param name="objencoding">编码方式例如:System.Text.Encoding.UTF8;</param>
///<returns>String类型的数据</returns>
public string GetHttpRequestStringByNUll_Get(string URL, Encoding objencoding, string _Accept, string useragent)
{
//准备参数
SetRequest(URL, "GET", _Accept, "text/html", useragent, objencoding);
//调用专门读取数据的类
return GetHttpRequestData("");
}
///<summary>
///采用https协议Post方式访问网络,根据传入的URl地址,得到响应的数据字符串。
///</summary>
///<param name="URL">url地址</param>
///<param name="strPostdata">Post发送的数据</param>
///<param name="objencoding">编码方式例如:System.Text.Encoding.UTF8;</param>
///<returns>String类型的数据</returns>
public string GetHttpRequestStringByNUll_Post(string URL, string strPostdata, Encoding objencoding)
{
//准备参数
SetRequest(URL, "post", "text/html, application/xhtml+xml, */*,zh-CN", "text/html", "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)", objencoding);
//调用专门读取数据的类
return GetHttpRequestData(strPostdata);
}
#endregion
}
具体使用
public string GetHtml(string url, string type)
{
HttpHelps objhh = new HttpHelps();
return objhh.GetHttpRequestStringByNUll_Get(url, System.Text.Encoding.GetEncoding(type.Trim()));
}
在很多情况下我们会使用间进程的webBrowser去实现一些网页的请求和抓去,这个时候有部分网页是取不到Cookie的,那怎么办呢?下面我提供一个方法,应该99%的都能取到,
//取当前webBrowser登录后的Cookie值
[DllImport("wininet.dll", CharSet = CharSet.Auto, SetLastError = true)]
static extern bool InternetGetCookieEx(string pchURL, string pchCookieName, StringBuilder pchCookieData, ref int pcchCookieData, int dwFlags, object lpReserved);
//取出Cookie,当登录后才能取
private static string GetCookieString(string url)
{
// Determine the size of the cookie
int datasize = 256;
StringBuilder cookieData = new StringBuilder(datasize);
if (!InternetGetCookieEx(url, null, cookieData, ref datasize, 0x00002000, null))
{
if (datasize < 0)
return null;
// Allocate stringbuilder large enough to hold the cookie
cookieData = new StringBuilder(datasize);
if (!InternetGetCookieEx(url, null, cookieData, ref datasize, 0x00002000, null))
return null;
}
return cookieData.ToString();
}
文章来自: http://sufei.cnblogs.com/
最新的HttpHeper类下载:
https://files.cnblogs.com/sufei/HttpHelps.zip (更新时间2011-12-07)
下载更新可能没有下面的类快,如果要使用最新版的就直接复制下面代码,下载我会抽空更新
之前我写过篇关于C# HttpWebRequest 绝技的文章 无视证书的方法请在篇文章里面查找谢谢,以下不做无视证书的方法
无论是Get还是Post 带Cookie,编码问题解决 ,这里完全做到了无视编码的问题
最近把上面的方法整理了一下,这个类相当于一个SqlHelper类一下,我把它叫做HttpHelper类,以后还会慢慢更新,希望大家多我支持,
给大家分享一下吧,不好的地方感谢大家留言指正,不多说了上代码吧!
/// <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
/// 编码日期:2011-08-20
/// 编 码 人: 苏飞
/// 联系方式:361983679 Email:sufei.1013@163.com Blogs:http://sufei.cnblogs.com
/// </summary>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;
using System.Text.RegularExpressions;
using System.IO.Compression;
public class HttpHelps
{
#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;
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())
{
//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="_URL">请求的URL地址</param>
/// <param name="_Method">请求方式Get或者Post</param>
/// <param name="_Accept">Accept</param>
/// <param name="_ContentType">ContentType返回类型</param>
/// <param name="_UserAgent">UserAgent客户端的访问类型,包括浏览器版本和操作系统信息</param>
/// <param name="_Encoding">读取数据时的编码方式</param>
private void SetRequest(string _URL, string _Method, string _Accept, string _ContentType, string _UserAgent, Encoding _Encoding)
{
//初始化对像,并设置请求的URL地址
request = (HttpWebRequest)WebRequest.Create(GetUrl(_URL));
//请求方式Get或者Post
request.Method = _Method;
//Accept
request.Accept = _Accept;
//ContentType返回类型
request.ContentType = _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 = _UserAgent;
//读取数据时的编码方式
encoding = _Encoding;
}
#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GET|POST方式访问网络,根据传入的URl地址,得到响应的数据字符串。
/// </summary>
/// <param name="_URL"></param>
/// <param name="_Method">请求方式Get或者Post</param>
/// <param name="_Accept">Accept</param>
/// <param name="_ContentType">ContentType返回类型</param>
/// <param name="_UserAgent">UserAgent客户端的访问类型,包括浏览器版本和操作系统信息</param>
/// <param name="_Encoding">读取数据时的编码方式</param>
/// <param name="_Postdata">只有_Method为Post方式时才需要传入值</param>
/// <returns>返回Html源代码</returns>
public string GetHttpRequestString(string _URL, string _Method, string _Accept, string _ContentType, string _UserAgent, Encoding _Encoding, string _Postdata)
{
//准备参数
SetRequest(_URL, _Method, _Accept, _ContentType, _UserAgent, _Encoding);
//调用专门读取数据的类
return GetHttpRequestData(_Postdata);
}
///<summary>
///采用https协议GET方式访问网络,根据传入的URl地址,得到响应的数据字符串。
///</summary>
///<param name="URL">url地址</param>
///<param name="objencoding">编码方式例如:System.Text.Encoding.UTF8;</param>
///<returns>String类型的数据</returns>
public string GetHttpRequestStringByNUll_Get(string URL, Encoding objencoding)
{
//准备参数
SetRequest(URL, "GET", "text/html, application/xhtml+xml, */*", "text/html", "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)", objencoding);
//调用专门读取数据的类
return GetHttpRequestData("");
}
///<summary>
///采用https协议GET方式访问网络,根据传入的URl地址,得到响应的数据字符串。
///</summary>
///<param name="URL">url地址</param>
///<param name="objencoding">编码方式例如:System.Text.Encoding.UTF8;</param>
///<param name="stgrcookie">Cookie字符串</param>
///<returns>String类型的数据</returns>
public string GetHttpRequestStringByNUll_GetBycookie(string URL, Encoding objencoding, string stgrcookie)
{
//准备参数
SetRequest(URL, "GET", "text/html, application/xhtml+xml, */*", "text/html", "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)", objencoding);
request.Headers[HttpRequestHeader.Cookie] = stgrcookie;
//调用专门读取数据的类
return GetHttpRequestData("");
}
///<summary>
///采用https协议GET方式访问网络,根据传入的URl地址,得到响应的数据字符串。
///</summary>
///<param name="URL">url地址</param>
///<param name="objencoding">编码方式例如:System.Text.Encoding.UTF8;</param>
///<returns>String类型的数据</returns>
public string GetHttpRequestStringByNUll_Get(string URL, Encoding objencoding, string _Accept, string useragent)
{
//准备参数
SetRequest(URL, "GET", _Accept, "text/html", useragent, objencoding);
//调用专门读取数据的类
return GetHttpRequestData("");
}
///<summary>
///采用https协议Post方式访问网络,根据传入的URl地址,得到响应的数据字符串。
///</summary>
///<param name="URL">url地址</param>
///<param name="strPostdata">Post发送的数据</param>
///<param name="objencoding">编码方式例如:System.Text.Encoding.UTF8;</param>
///<returns>String类型的数据</returns>
public string GetHttpRequestStringByNUll_Post(string URL, string strPostdata, Encoding objencoding)
{
//准备参数
SetRequest(URL, "post", "text/html, application/xhtml+xml, */*,zh-CN", "text/html", "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)", objencoding);
//调用专门读取数据的类
return GetHttpRequestData(strPostdata);
}
#endregion
}
具体使用
public string GetHtml(string url, string type)
{
HttpHelps objhh = new HttpHelps();
return objhh.GetHttpRequestStringByNUll_Get(url, System.Text.Encoding.GetEncoding(type.Trim()));
}
在很多情况下我们会使用间进程的webBrowser去实现一些网页的请求和抓去,这个时候有部分网页是取不到Cookie的,那怎么办呢?下面我提供一个方法,应该99%的都能取到,
//取当前webBrowser登录后的Cookie值
[DllImport("wininet.dll", CharSet = CharSet.Auto, SetLastError = true)]
static extern bool InternetGetCookieEx(string pchURL, string pchCookieName, StringBuilder pchCookieData, ref int pcchCookieData, int dwFlags, object lpReserved);
//取出Cookie,当登录后才能取
private static string GetCookieString(string url)
{
// Determine the size of the cookie
int datasize = 256;
StringBuilder cookieData = new StringBuilder(datasize);
if (!InternetGetCookieEx(url, null, cookieData, ref datasize, 0x00002000, null))
{
if (datasize < 0)
return null;
// Allocate stringbuilder large enough to hold the cookie
cookieData = new StringBuilder(datasize);
if (!InternetGetCookieEx(url, null, cookieData, ref datasize, 0x00002000, null))
return null;
}
return cookieData.ToString();
}