/// <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 (item.IfModifiedSince != null) _request.IfModifiedSince = Convert.ToDateTime(item.IfModifiedSince);
//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;
//设置安全凭证
_request.Credentials = item.Credentials;
//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;
if (item.MaximumAutomaticRedirections > 0)
{
_request.MaximumAutomaticRedirections = item.MaximumAutomaticRedirections;
}
//设置Post数据
SetPostData(item);
//设置最大连接
if (item.Connectionlimit > 0) _request.ServicePoint.ConnectionLimit = item.Connectionlimit;
}
/// <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)
{
result.Cookie = string.Empty;
result.Header = null;
result.Html = ex.Message;
result.StatusDescription = "配置参数时出错：" + ex.Message;
//配置参数时出错
return result;
}
try
{
//请求数据
using (_response = (HttpWebResponse)_request.GetResponse())
{
GetData(item, result);
}
}
catch (WebException ex)
{
if (ex.Response != null)
{
using (_response = (HttpWebResponse)ex.Response)
{
GetData(item, result);
}
}
else
{
result.Html = ex.Message;
}
}
catch (Exception ex)
{
result.Html = ex.Message;
}
if (item.IsToLower) result.Html = result.Html.ToLower();
return result;
}
/// <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("get"))
{
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.IsNullOrEmpty(item.Postdata))
{
StreamReader r = new StreamReader(item.Postdata, _postencoding);
buffer = _postencoding.GetBytes(r.ReadToEnd());
r.Close();
} //写入字符串
else if (!string.IsNullOrEmpty(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)
{
bool isIeProxy = false;
if (!string.IsNullOrEmpty(item.ProxyIp))
{
isIeProxy = item.ProxyIp.ToLower().Contains("ieproxy");
}
if (!string.IsNullOrEmpty(item.ProxyIp) && !isIeProxy)
{
//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;
}
}
else if (isIeProxy)
{
//设置为IE代理
}
else
{
_request.Proxy = item.WebProxy;
}
}
/// <summary>
/// 设置编码
/// </summary>
/// <param name="item">HttpItem</param>
/// <param name="result">HttpResult</param>
/// <param name="responseByte">byte[]</param>
private void SetEncoding(HttpItem item, HttpResult result, byte[] responseByte)
{
//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 = string.Empty;
if (meta != null && meta.Groups.Count > 0)
{
c = meta.Groups[1].Value.ToLower().Trim();
}
if (c.Length > 2)
{
try
{
_encoding = Encoding.GetEncoding(c.Replace("\"", string.Empty).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);
}
}
}
}
/// <summary>
/// 设置Cookie
/// </summary>
/// <param name="item">Http参数</param>
private void SetCookie(HttpItem item)
{
if (!string.IsNullOrEmpty(item.Cookie)) _request.Headers[HttpRequestHeader.Cookie] = item.Cookie;
//设置CookieCollection
if (item.ResultCookieType == ResultCookieType.CookieCollection)
{
_request.CookieContainer = new CookieContainer();
if (item.CookieCollection != null && item.CookieCollection.Count > 0)
_request.CookieContainer.Add(item.CookieCollection);
}
}
/// <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>
/// 设置证书
/// </summary>
/// <param name="item"></param>
private void SetCer(HttpItem item)
{
if (!string.IsNullOrEmpty(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 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>
/// 获取数据的并解析的方法
/// </summary>
/// <param name="item"></param>
/// <param name="result"></param>
private void GetData(HttpItem item, HttpResult result)
{
#region base
//获取StatusCode
result.StatusCode = _response.StatusCode;
//获取StatusDescription
result.StatusDescription = _response.StatusDescription;
//获取Headers
result.Header = _response.Headers;
//获取CookieCollection
if (_response.Cookies != null) result.CookieCollection = _response.Cookies;
//获取set-cookie
if (_response.Headers["set-cookie"] != null) result.Cookie = _response.Headers["set-cookie"];
#endregion
#region byte
//处理网页Byte
byte[] responseByte = GetByte();
#endregion
#region Html
if (responseByte != null && responseByte.Length > 0)
{
//设置编码
SetEncoding(item, result, responseByte);
//得到返回的HTML
result.Html = _encoding.GetString(responseByte);
}
else
{
//没有返回任何Html代码
result.Html = string.Empty;
}
#endregion
}