using System;
using System.IO;
using System.IO.Compression;
using System.Net;
using System.Net.Security;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Text.RegularExpressions;
namespace Nop.Core
{
/// <summary>
/// Http连接操作帮助类
/// </summary>
public class HttpHelper
{
#region 预定义方法或者变更
//默认的编码
private Encoding encoding = Encoding.Default;
//Post数据编码
private Encoding postencoding = 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;
/// <summary>
/// 根据相传入的数据，得到相应页面数据
/// </summary>
/// <param name="item">参数类对象</param>
/// <returns>返回HttpResult类型</returns>
public HttpResult GetHtml(HttpItem item)
{
//返回参数
HttpResult result = new HttpResult();
try
{
//准备参数
SetRequest(item);
}
catch (Exception ex)
{
return new HttpResult() { Cookie = string.Empty, Header = null, Html = ex.Message, StatusDescription = "配置参数时出错：" + ex.Message };
}
try
{
#region 得到请求的response
if (item.ResultCookieType == ResultCookieType.CookieCollection)
request.CookieContainer = new CookieContainer();
using (response = (HttpWebResponse)request.GetResponse())
{
result.StatusCode = response.StatusCode;
result.StatusDescription = response.StatusDescription;
result.Header = response.Headers;
if (response.Cookies != null) result.CookieCollection = response.Cookies;
if (response.Headers["set-cookie"] != null) result.Cookie = response.Headers["set-cookie"];
byte[] ResponseByte = null;
using (MemoryStream _stream = new MemoryStream())
{
//GZIIP处理
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);
}
else
{
//开始读取流并设置编码方式
response.GetResponseStream().CopyTo(_stream, 10240);
}
//获取Byte
ResponseByte = _stream.ToArray();
}
if (ResponseByte != null & ResponseByte.Length > 0)
{
//是否返回Byte类型数据
if (item.ResultType == ResultType.Byte) result.ResultByte = ResponseByte;
//从这里开始我们要无视编码了
if (encoding == null)
{
Match meta = Regex.Match(Encoding.Default.GetString(ResponseByte), "<meta([^<]*)charset=([^<]*)[\"']", RegexOptions.IgnoreCase);
string c = (meta.Groups.Count > 1) ? meta.Groups[2].Value.ToLower().Trim() : string.Empty;
if (c.Length > 2)
{
try
{
if (c.IndexOf(" ") > 0) c = c.Substring(0, c.IndexOf(" "));
encoding = Encoding.GetEncoding(c.Replace("\"", "").Replace("'", "").Replace(";", "").Replace("iso-8859-1", "gbk").Trim());
}
catch
{
if (string.IsNullOrEmpty(response.CharacterSet)) encoding = Encoding.UTF8;
else encoding = Encoding.GetEncoding(response.CharacterSet);
}
}
else
{
if (string.IsNullOrEmpty(response.CharacterSet)) encoding = Encoding.UTF8;
else encoding = Encoding.GetEncoding(response.CharacterSet);
}
}
//得到返回的HTML
result.Html = encoding.GetString(ResponseByte);
}
else
{
//得到返回的HTML
result.Html = "本次请求并未返回任何数据";
}
}
#endregion
}
catch (WebException ex)
{
//这里是在发生异常时返回的错误信息
response = (HttpWebResponse)ex.Response;
result.Html = ex.Message;
if (response != null)
{
result.StatusCode = response.StatusCode;
result.StatusDescription = response.StatusDescription;
}
}
catch (Exception ex)
{
result.Html = ex.Message;
}
if (item.IsToLower) result.Html = result.Html.ToLower();
return result;
}
/// <summary>
/// 为请求准备参数
/// </summary>
///<param name="item">参数列表</param>
private void SetRequest(HttpItem item)
{
// 验证证书
SetCer(item);
//设置Header参数
if (item.Header != null && item.Header.Count > 0) foreach (string key in item.Header.AllKeys)
{
request.Headers.Add(key, item.Header[key]);
}
// 设置代理
SetProxy(item);
if (item.ProtocolVersion != null) request.ProtocolVersion = item.ProtocolVersion;
request.ServicePoint.Expect100Continue = item.Expect100Continue;
//请求方式Get或者Post
request.Method = item.Method;
request.Timeout = item.Timeout;
request.KeepAlive = item.KeepAlive;
request.ReadWriteTimeout = item.ReadWriteTimeout;
if (!string.IsNullOrWhiteSpace(item.Host))
{
request.Host = item.Host;
}
//Accept
request.Accept = item.Accept;
//ContentType返回类型
request.ContentType = item.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 = item.UserAgent;
// 编码
encoding = item.Encoding;
//设置Cookie
SetCookie(item);
//来源地址
request.Referer = item.Referer;
//是否执行跳转功能
request.AllowAutoRedirect = item.Allowautoredirect;
//设置Post数据
SetPostData(item);
//设置最大连接
if (item.Connectionlimit > 0) request.ServicePoint.ConnectionLimit = item.Connectionlimit;
}
/// <summary>
/// 设置证书
/// </summary>
/// <param name="item"></param>
private void SetCer(HttpItem item)
{
if (!string.IsNullOrWhiteSpace(item.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(item.URL);
SetCerList(item);
//将证书添加到请求里
request.ClientCertificates.Add(new X509Certificate(item.CerPath));
}
else
{
//初始化对像，并设置请求的URL地址
request = (HttpWebRequest)WebRequest.Create(item.URL);
SetCerList(item);
}
}
/// <summary>
/// 设置多个证书
/// </summary>
/// <param name="item"></param>
private void SetCerList(HttpItem item)
{
if (item.ClentCertificates != null && item.ClentCertificates.Count > 0)
{
foreach (X509Certificate c in item.ClentCertificates)
{
request.ClientCertificates.Add(c);
}
}
}
/// <summary>
/// 设置Cookie
/// </summary>
/// <param name="item">Http参数</param>
private void SetCookie(HttpItem item)
{
if (!string.IsNullOrWhiteSpace(item.Cookie))
//Cookie
request.Headers[HttpRequestHeader.Cookie] = item.Cookie;
//设置Cookie
if (item.CookieCollection != null && item.CookieCollection.Count > 0)
{
request.CookieContainer = new CookieContainer();
request.CookieContainer.Add(item.CookieCollection);
}
}
/// <summary>
/// 设置Post数据
/// </summary>
/// <param name="item">Http参数</param>
private void SetPostData(HttpItem item)
{
//验证在得到结果时是否有传入数据
if (request.Method.Trim().ToLower().Contains("post"))
{
if (item.PostEncoding != null)
{
postencoding = item.PostEncoding;
}
byte[] buffer = null;
//写入Byte类型
if (item.PostDataType == PostDataType.Byte && item.PostdataByte != null && item.PostdataByte.Length > 0)
{
//验证在得到结果时是否有传入数据
buffer = item.PostdataByte;
}//写入文件
else if (item.PostDataType == PostDataType.FilePath && !string.IsNullOrWhiteSpace(item.Postdata))
{
StreamReader r = new StreamReader(item.Postdata, postencoding);
buffer = postencoding.GetBytes(r.ReadToEnd());
r.Close();
} //写入字符串
else if (!string.IsNullOrWhiteSpace(item.Postdata))
{
buffer = postencoding.GetBytes(item.Postdata);
}
if (buffer != null)
{
request.ContentLength = buffer.Length;
request.GetRequestStream().Write(buffer, 0, buffer.Length);
}
}
}
/// <summary>
/// 设置代理
/// </summary>
/// <param name="item">参数对象</param>
private void SetProxy(HttpItem item)
{
if (!string.IsNullOrWhiteSpace(item.ProxyIp))
{
//设置代理服务器
if (item.ProxyIp.Contains(":"))
{
string[] plist = item.ProxyIp.Split(':');
WebProxy myProxy = new WebProxy(plist[0].Trim(), Convert.ToInt32(plist[1].Trim()));
//建议连接
myProxy.Credentials = new NetworkCredential(item.ProxyUserName, item.ProxyPwd);
//给当前请求对象
request.Proxy = myProxy;
}
else
{
WebProxy myProxy = new WebProxy(item.ProxyIp, false);
//建议连接
myProxy.Credentials = new NetworkCredential(item.ProxyUserName, item.ProxyPwd);
//给当前请求对象
request.Proxy = myProxy;
}
//设置安全凭证
request.Credentials = CredentialCache.DefaultNetworkCredentials;
}
}
/// <summary>
/// 回调验证证书问题
/// </summary>
/// <param name="sender">流对象</param>
/// <param name="certificate">证书</param>
/// <param name="chain">X509Chain</param>
/// <param name="errors">SslPolicyErrors</param>
/// <returns>bool</returns>
public bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors) { return true; }
/// <summary>
/// 简洁模拟HTTP请求
/// </summary>
/// <param name="requestUrl">请求的Url地址</param>
/// <param name="requestMethod">目前支持字符串格式的get或post</param>
/// <param name="postData">post请求时提供如下格式数据：a=1&b=2&c=3...</param>
/// <param name="requestCookie">如果需要cookie请带上，格式：a=1;b=2;c=3...</param>
/// <param name="requestReferer">来源页面地址</param>
/// <returns></returns>
public HttpResult GetHtml(string requestUrl, string requestMethod="get",string postData="",string requestCookie="",string requestReferer="")
{
string requestContentType = requestMethod == "get" ? "text/html" : "application/x-www-form-urlencoded";
HttpItem item = new HttpItem()
{
URL = requestUrl,//URL 必需项
Method = requestMethod,//URL 可选项 默认为Get
IsToLower = false,//得到的HTML代码是否转成小写 可选项默认转小写
Cookie = requestCookie,//字符串Cookie 可选项
Referer = requestReferer,//来源URL 可选项
Postdata = postData,//Post数据 可选项GET时不需要写
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
UserAgent = "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)",
ContentType = requestContentType,//返回类型 可选项有默认值
Allowautoredirect = false,//是否根据301跳转 可选项
ResultType = ResultType.String,
Encoding=Encoding.UTF8,
PostEncoding=Encoding.UTF8
};
return GetHtml(item);
}
public byte[] GetImage(string sourceImgUrl)
{
HttpItem item = new HttpItem()
{
URL = sourceImgUrl,//URL 必需项
Method = "get",//URL 可选项 默认为Get
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
Referer = "",//来源URL 可选项
Postdata = "",//Post数据 可选项GET时不需要写
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
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
ResultType = ResultType.Byte
};
HttpResult result = GetHtml(item);
return result.ResultByte;
}
public byte[] GetAudio(string sourceUrl,string cookie)
{
HttpItem item = new HttpItem()
{
URL = sourceUrl,//URL 必需项
Method = "get",//URL 可选项 默认为Get
IsToLower = false,//得到的HTML代码是否转成小写 可选项默认转小写
Cookie = cookie,//字符串Cookie 可选项
Referer = "",//来源URL 可选项
Postdata = "",//Post数据 可选项GET时不需要写
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
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
ResultType = ResultType.Byte,
ContentType = "audio/mpeg"
};
HttpResult result = GetHtml(item);
return result.ResultByte;
}
#endregion
}
/// <summary>
/// Http请求参考类
/// </summary>
public class HttpItem
{
/// <summary>
/// 请求URL必须填写
/// </summary>
public string URL { get; set; }
string _Method = "GET";
/// <summary>
/// 请求方式默认为GET方式,当为POST方式时必须设置Postdata的值
/// </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; }
}
/// <summary>
/// 设置Host的标头信息
/// </summary>
public string Host { get; set; }
Boolean _KeepAlive = true;
/// <summary>
/// 获取或设置一个值，该值指示是否与 Internet 资源建立持久性连接默认为true。
/// </summary>
public Boolean KeepAlive
{
get { return _KeepAlive; }
set { _KeepAlive = 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; }
}
/// <summary>
/// 返回数据编码默认为NUll,可以自动识别,一般为utf-8,gbk,gb2312
/// </summary>
public Encoding Encoding { get; set; }
private PostDataType _PostDataType = PostDataType.String;
/// <summary>
/// Post的数据类型
/// </summary>
public PostDataType PostDataType
{
get { return _PostDataType; }
set { _PostDataType = value; }
}
/// <summary>
/// Post请求时要发送的字符串Post数据
/// </summary>
public string Postdata { get; set; }
/// <summary>
/// Post请求时要发送的Byte类型的Post数据
/// </summary>
public byte[] PostdataByte { get; set; }
/// <summary>
/// Cookie对象集合
/// </summary>
public CookieCollection CookieCollection { get; set; }
/// <summary>
/// 请求时的Cookie
/// </summary>
public string Cookie { get; set; }
/// <summary>
/// 来源地址，上次访问地址
/// </summary>
public string Referer { get; set; }
/// <summary>
/// 证书绝对路径
/// </summary>
public string CerPath { get; set; }
private Boolean isToLower = false;
/// <summary>
/// 是否设置为全文小写，默认为不转化
/// </summary>
public Boolean IsToLower
{
get { return isToLower; }
set { isToLower = value; }
}
private Boolean allowautoredirect = false;
/// <summary>
/// 支持跳转页面，查询结果将是跳转后的页面，默认是不跳转
/// </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; }
}
/// <summary>
/// 代理Proxy 服务器用户名
/// </summary>
public string ProxyUserName { get; set; }
/// <summary>
/// 代理 服务器密码
/// </summary>
public string ProxyPwd { get; set; }
/// <summary>
/// 代理 服务IP
/// </summary>
public string ProxyIp { get; set; }
private ResultType resulttype = ResultType.String;
/// <summary>
/// 设置返回类型String和Byte
/// </summary>
public ResultType ResultType
{
get { return resulttype; }
set { resulttype = value; }
}
private WebHeaderCollection header = new WebHeaderCollection();
/// <summary>
/// header对象
/// </summary>
public WebHeaderCollection Header
{
get { return header; }
set { header = value; }
}
/// <summary>
// 获取或设置用于请求的 HTTP 版本。返回结果:用于请求的 HTTP 版本。默认为 System.Net.HttpVersion.Version11。
/// </summary>
public Version ProtocolVersion { get; set; }
private Boolean _expect100continue = true;
/// <summary>
/// 获取或设置一个 System.Boolean 值，该值确定是否使用 100-Continue 行为。如果 POST 请求需要 100-Continue 响应，则为 true；否则为 false。默认值为 true。
/// </summary>
public Boolean Expect100Continue
{
get { return _expect100continue; }
set { _expect100continue = value; }
}
/// <summary>
/// 设置509证书集合
/// </summary>
public X509CertificateCollection ClentCertificates { get; set; }
/// <summary>
/// 设置或获取Post参数编码,默认的为Default编码
/// </summary>
public Encoding PostEncoding { get; set; }
private ResultCookieType _ResultCookieType = ResultCookieType.String;
/// <summary>
/// Cookie返回类型,默认的是只返回字符串类型
/// </summary>
public ResultCookieType ResultCookieType
{
get { return _ResultCookieType; }
set { _ResultCookieType = value; }
}
}
/// <summary>
/// Http返回参数类
/// </summary>
public class HttpResult
{
/// <summary>
/// Http请求返回的Cookie
/// </summary>
public string Cookie { get; set; }
/// <summary>
/// Cookie对象集合
/// </summary>
public CookieCollection CookieCollection { get; set; }
/// <summary>
/// 返回的String类型数据 只有ResultType.String时才返回数据，其它情况为空
/// </summary>
public string Html { get; set; }
/// <summary>
/// 返回的Byte数组 只有ResultType.Byte时才返回数据，其它情况为空
/// </summary>
public byte[] ResultByte { get; set; }
/// <summary>
/// header对象
/// </summary>
public WebHeaderCollection Header { get; set; }
/// <summary>
/// 返回状态说明
/// </summary>
public string StatusDescription { get; set; }
/// <summary>
/// 返回状态码,默认为OK
/// </summary>
public HttpStatusCode StatusCode { get; set; }
}
/// <summary>
/// 返回类型
/// </summary>
public enum ResultType
{
/// <summary>
/// 表示只返回字符串 只有Html有数据
/// </summary>
String,
/// <summary>
/// 表示返回字符串和字节流 ResultByte和Html都有数据返回
/// </summary>
Byte
}
/// <summary>
/// Post的数据格式默认为string
/// </summary>
public enum PostDataType
{
/// <summary>
/// 字符串类型，这时编码Encoding可不设置
/// </summary>
String,
/// <summary>
/// Byte类型，需要设置PostdataByte参数的值编码Encoding可设置为空
/// </summary>
Byte,
/// <summary>
/// 传文件，Postdata必须设置为文件的绝对路径，必须设置Encoding的值
/// </summary>
FilePath
}
/// <summary>
/// Cookie返回类型
/// </summary>
public enum ResultCookieType
{
/// <summary>
/// 只返回字符串类型的Cookie
/// </summary>
String,
/// <summary>
/// CookieCollection格式的Cookie集合同时也返回String类型的cookie
/// </summary>
CookieCollection
}
}
