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using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.IO;
using System.IO.Compression;
using System.Linq;
using System.Net;
using System.Net.Security;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Text.RegularExpressions;
using System.Web;
using Hawk.Core.Utils.Logs;
using Hawk.Core.Utils.Plugins;
namespace Hawk.Core.Utils
{
public enum ContentType
{
Text,
Json,
XML,
Byte
}
public class HttpHelper
{
//默认的编码
private Encoding encoding = Encoding.Default;
//public bool AutoVisit(HttpItem item)
//{
// var res = GetHtml(item);
// XLogSys.Print.Info(res.Substring(0, Math.Min(res.Length, 300)));
// var relocate = false;
// item.Method = MethodType.GET;
// while (true)
// {
// if (item.ResponseHeaders == null)
// break;
// var newpos = item.ResponseHeaders["Location"];
// if (newpos == null)
// break;
// XLogSys.Print.Debug("Redirect to " + newpos);
// item.URL = newpos;
// res = GetHtml(item);
// relocate = true;
// }
// return relocate;
//}
private FreeDocument CookieToDict(string cookie)
{
var dict = new FreeDocument();
foreach (var s in cookie.Split(';'))
{
// foreach (var s in p.Split(';'))
{
var equalpos = s.IndexOf("=");
if (equalpos != -1) //有可能cookie 无=，就直接一个cookiename；比如:a=3;ck;abc=;
{
var cookieKey = s.Substring(0, equalpos).Trim();
var cookievalue = "";
if (equalpos != s.Length - 1) //这种是等号后面无值，如：abc=;
{
cookievalue = s.Substring(equalpos + 1, s.Length - equalpos - 1).Trim();
}
dict.SetValue(cookieKey.Trim(), cookievalue.Trim());
}
else
{
var cookieKey = s.Trim();
dict.SetValue(cookieKey.Trim(), "");
}
}
}
return dict;
}
public string MergeCookie(string c1, string c2)
{
var dict1 = CookieToDict(c1);
var dict2 = CookieToDict(c2);
dict1.DictCopyTo(dict2);
var v2 = string.Join(";", dict2.Select(d => $"{d.Key}={d.Value}"));
return v2;
}
/// <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>
/// <param name="ContentType">返回的响应数据的类型</param>
/// <returns>string类型的响应数据</returns>
private byte[] GetHttpRequestFile(HttpWebRequest request, HttpItem objhttpitem, out HttpStatusCode statusCode)
{
byte[] result = null;
using (var response = (HttpWebResponse) request.GetResponse())
{
var _stream = new MemoryStream();
var docu = objhttpitem.GetHeaderParameter();
if (response.Headers["set-cookie"] != null)
docu["Cookie"] = MergeCookie(docu["Cookie"].ToString(), response.Headers["set-cookie"]);
statusCode = response.StatusCode;
objhttpitem.Parameters = HttpItem.HeaderToString(docu);
//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);
//.net4.0以下写法
_stream =
GetMemoryStream(new GZipStream(response.GetResponseStream(), CompressionMode.Decompress));
}
else
{
//开始读取流并设置编码方式
//response.GetResponseStream().CopyTo(_stream, 10240);
//.net4.0以下写法
_stream = GetMemoryStream(response.GetResponseStream());
}
//获取Byte
result = _stream.ToArray();
//是否返回Byte类型数据
_stream.Close();
}
return result;
}
/// <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>
/// <param name="ContentType">返回的响应数据的类型</param>
/// <returns>string类型的响应数据</returns>
private string GetHttpRequestData(HttpWebRequest request, HttpItem objhttpitem,out WebHeaderCollection responseHeaders, out HttpStatusCode statusCode)
{
var result = "";
#region 得到请求的response
using (var response = (HttpWebResponse) request.GetResponse())
{
MemoryStream stream;
var docu = objhttpitem.GetHeaderParameter();
if (response.Headers["set-cookie"] != null)
docu["Cookie"] = MergeCookie(docu["Cookie"].ToString(), response.Headers["set-cookie"]);
responseHeaders= response.Headers;
statusCode = response.StatusCode;
objhttpitem.Parameters = HttpItem.HeaderToString(docu);
//GZIIP处理
if (response.ContentEncoding != null &&
response.ContentEncoding.Equals("gzip", StringComparison.InvariantCultureIgnoreCase))
{
stream =
GetMemoryStream(new GZipStream(response.GetResponseStream(), CompressionMode.Decompress));
}
else
{
stream = GetMemoryStream(response.GetResponseStream());
}
//获取Byte
var rawResponse = stream.ToArray();
//是否返回Byte类型数据
if (objhttpitem.Encoding == EncodingType.Unknown || encoding == null)
{
var temp = Encoding.Default.GetString(rawResponse, 0, rawResponse.Length);
//<meta(.*?)charset([\s]?)=[^>](.*?)>
var meta = Regex.Match(temp, "<meta([^<]*)charset=([^<]*)[\"']",
RegexOptions.IgnoreCase | RegexOptions.Multiline);
var 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");
if (charter.Contains("utf-8") || charter.Contains("UTF-8"))
{
encoding = Encoding.UTF8;
}
else if (charter.Contains("gb"))
{
encoding = Encoding.GetEncoding("GB2312");
}
else
{
encoding = Encoding.GetEncoding(charter);
}
}
else
{
if (response.CharacterSet != null && response.CharacterSet.ToLower().Trim() == "iso-8859-1")
{
encoding = Encoding.GetEncoding("gbk");
}
}
}
//得到返回的HTML
result = encoding.GetString(rawResponse);
//最后释放流
stream.Close();
}
return result;
}
/// <summary>
/// 获取html代码
/// </summary>
/// <param name="url">网页地址</param>
/// <returns></returns>
public static string GetWebSourceHtml(string url, string strFormat = "gb2312")
{
var str = string.Empty;
try
{
var request = (HttpWebRequest) WebRequest.Create(url);
request.Timeout = 30000;
request.Headers.Set("Pragma", "no-cache");
var response = request.GetResponse();
var streamReceive = response.GetResponseStream();
var encoding = Encoding.GetEncoding(strFormat);
var streamReader = new StreamReader(streamReceive, encoding);
str = streamReader.ReadToEnd();
streamReader.Close();
}
catch (Exception ex)
{
XLogSys.Print.Error(ex.Message);
}
return str;
}
[DllImport("wininet.dll", CharSet = CharSet.Auto, SetLastError = true)]
public static extern bool InternetSetCookie(string lpszUrlName, string lbszCookieName, string lpszCookieData);
/// <summary>
/// 组装普通文本请求参数。
/// </summary>
/// <param name="parameters">Key-Value形式请求参数字典。</param>
/// <returns>URL编码后的请求数据。</returns>
private static string BuildPostData(IDictionary<string, object> parameters)
{
var postData = new StringBuilder();
var hasParam = false;
var dem = parameters.GetEnumerator();
while (dem.MoveNext())
{
var name = dem.Current.Key;
var value = dem.Current.Value.ToString();
// 忽略参数名或参数值为空的参数
if (!string.IsNullOrEmpty(name) && !string.IsNullOrEmpty(value))
{
if (hasParam)
{
postData.Append("&");
}
postData.Append(name);
postData.Append("=");
postData.Append(Uri.EscapeDataString(value));
hasParam = true;
}
}
return postData.ToString();
}
public static bool SetHeaderValue(WebHeaderCollection header, string name, string value)
{
var property = typeof (WebHeaderCollection).GetProperty("InnerCollection",
BindingFlags.Instance | BindingFlags.NonPublic);
var collection = property?.GetValue(header, null) as NameValueCollection;
if (collection != null)
{
collection[name] = value;
return true;
}
return false;
}
/// <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)
{
var _stream = new MemoryStream();
var Length = 256;
var buffer = new byte[Length];
var 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;
}
public static void SetRequest(HttpItem item, HttpWebRequest request, string desturl = null, string post = null)
{
var docu = item.GetHeaderParameter();
// 设置代理
if (item.ProxyPort == 0 || string.IsNullOrEmpty(item.ProxyIP))
{
//不需要设置
}
else
{
//设置代理服务器
var myProxy = new WebProxy(item.ProxyIP, item.ProxyPort);
//建议连接
myProxy.Credentials = new NetworkCredential(item.ProxyUserName, item.ProxyPassword);
//给当前请求对象
request.Proxy = myProxy;
//设置安全凭证
request.Credentials = CredentialCache.DefaultNetworkCredentials;
}
//请求方式Get或者Post
request.Method = item.Method.ToString();
request.Timeout = item.Timeout;
request.ReadWriteTimeout = item.ReadWriteTimeout;
//Accept
request.Headers = new WebHeaderCollection();
if (docu["Headers"].ToString() != "")
{
var str = docu["Headers"].ToString().Split('\n');
foreach (var s in str)
{
var ms = s.Split(':');
if (ms.Length != 2)
continue;
var key = ms[0].Trim();
var value = ms[1].Trim();
if (SetHeaderValue(request.Headers, key, value) == false)
{
request.Headers.Add(key, value);
}
}
}
request.Accept = docu["Accept"].ToString();
//ContentType返回类型
request.ContentType = docu["Content_Type"].ToString();
//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 = docu["User-Agent"].ToString();
var host = docu["Host"].ToString();
//if (string.IsNullOrEmpty(host) == false)
// request.Host = host;
//设置Cookie
var cookie = docu["Cookie"].ToString();
if (!string.IsNullOrEmpty(cookie))
{
request.Headers[HttpRequestHeader.Cookie] = cookie;
}
//来源地址
request.Referer = docu["Referer"].ToString();
//是否执行跳转功能
request.AllowAutoRedirect = item.Allowautoredirect;
//设置Post数据
string postdata = null;
if (post == null)
{
postdata = item.Postdata;
}
else
{
postdata = post;
}
//验证在得到结果时是否有传入数据
if (!string.IsNullOrEmpty(postdata) && request.Method.Trim().ToLower().Contains("post"))
{
var buffer = Encoding.Default.GetBytes(postdata);
request.ContentLength = buffer.Length;
request.GetRequestStream().Write(buffer, 0, buffer.Length);
}
////设置最大连接
//if (item.Connectionlimit > 0)
//{
// request.ServicePoint.ConnectionLimit = item.Connectionlimit;
//}
}
/// <summary>
/// 为请求准备参数
/// </summary>
/// <param name="item">参数列表</param>
/// <param name="_Encoding">读取数据时的编码方式</param>
private HttpWebRequest SetRequest(HttpItem item, string desturl = null, string post = null)
{
var url = desturl ?? item.URL;
if (url == null)
return null;
if (url.Contains("http") == false)
{
url = "http://" + url;
}
//初始化对像，并设置请求的URL地址
var request = (HttpWebRequest) WebRequest.Create(GetUrl(url));
// 验证证书
if (url.Contains("https"))
{
ServicePointManager.ServerCertificateValidationCallback =
(sender, certificate, chain, sslPolicyErrors) => true;
//ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls;
request.ProtocolVersion = HttpVersion.Version10;
}
SetRequest(item, request, desturl, post);
encoding = AttributeHelper.GetEncoding(item.Encoding);
return request;
}
///// <summary>
///// 设置代理
///// </summary>
///// <param name="requestitem">参数对象</param>
//private void SetProxy(HttpItem requestitem)
//{
// if (string.IsNullOrEmpty(requestitem.ProxyUserName) && string.IsNullOrEmpty(requestitem.ProxyPwd) &&
// string.IsNullOrEmpty(requestitem.ProxyIp))
// {
// //不需要设置
// }
// else
// {
// //设置代理服务器
// var myProxy = new WebProxy(requestitem.ProxyIp, requestitem.ProxyPort);
// //建议连接
// myProxy.Credentials = new NetworkCredential(requestitem.ProxyUserName, requestitem.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)
{
// 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;
}
public static string GetRealIp()
{
var ip = "";
try
{
var request = HttpContext.Current.Request;
if (request.ServerVariables["http_VIA"] != null)
{
ip = request.ServerVariables["http_X_FORWARDED_FOR"].Split(',')[0].Trim();
}
else
{
ip = request.UserHostAddress;
}
}
catch (Exception e)
{
throw e;
}
return ip;
}
public static bool IsSuccess(HttpStatusCode code)
{
return code == HttpStatusCode.OK;
}
/// <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="requestitem">参数列表</param>
/// <returns>String类型的数据</returns>
public string GetHtml(HttpItem requestitem, out WebHeaderCollection responseHeaders, out HttpStatusCode code, string url = null, string post = null)
{
try
{
var request = SetRequest(requestitem, url, post);
var r = GetHttpRequestData(request, requestitem,out responseHeaders, out code);
if (!IsSuccess(code))
{
XLogSys.Print.Warn($"HTTP Request Failed {code} | {requestitem.URL} ");
return "HTTP错误，类型:" + code;
}
XLogSys.Print.Debug($"HTTP Request Success {code} | {requestitem.URL} ");
return r;
}
catch (Exception ex)
{
code = HttpStatusCode.NotFound;
responseHeaders = null;
return ex.Message;
}
}
/// <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="requestitem">参数列表</param>
/// <returns>String类型的数据</returns>
public string GetHtml(HttpItem requestitem, out HttpStatusCode code, string url = null, string post = null)
{
WebHeaderCollection responseHeaders = null;
return GetHtml(requestitem, out responseHeaders,out code, url, post);
}
/// <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="requestitem">参数列表</param>
/// <returns>String类型的数据</returns>
public byte[] GetFile(HttpItem requestitem, out HttpStatusCode code, string url = null, string post = null)
{
try
{
var request = SetRequest(requestitem, url, post);
var r = GetHttpRequestFile(request, requestitem, out code);
if (!IsSuccess(code))
XLogSys.Print.ErrorFormat("HTTP错误，URL:{0},类型:{1}", url, code.ToString());
return r;
}
catch (Exception ex)
{
code = HttpStatusCode.NotFound;
return new byte[0];
}
}
#endregion
}
public enum MethodType
{
GET,
POST
}
/// <summary>
/// 返回类型
/// </summary>
public enum ResultType
{
String, //表示只返回字符串
Byte //表示返回字符串和字节流
}
}