/// <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)
{
// 验证证书
SetCer(objhttpItem);
//设置Header参数
if (objhttpItem.Header != null)
{
try
{
request.Headers = objhttpItem.Header;
}
catch
{
return;
}
}
// 设置代理
SetProxy(objhttpItem);
//请求方式Get或者Post
request.Method = objhttpItem.Method;
request.Timeout = objhttpItem.Timeout;
request.ReadWriteTimeout = objhttpItem.ReadWriteTimeout;
//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;
// 编码
SetEncoding(objhttpItem);
//设置Cookie
SetCookie(objhttpItem);
//来源地址
request.Referer = objhttpItem.Referer;
//是否执行跳转功能
request.AllowAutoRedirect = objhttpItem.Allowautoredirect;
//设置Post数据
SetPostData(objhttpItem);
//设置最大连接
if (objhttpItem.Connectionlimit > 0)
{
request.ServicePoint.ConnectionLimit = objhttpItem.Connectionlimit;
}
}
///<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 HttpResult GetHtml(HttpItem objhttpItem)
{
//准备参数
SetRequest(objhttpItem);
//调用专门读取数据的类
return GetHttpRequestData(objhttpItem);
}
/// <summary>
/// 设置Post数据
/// </summary>
/// <param name="objhttpItem">Http参数</param>
private void SetPostData(HttpItem objhttpItem)
{
//验证在得到结果时是否有传入数据
if (request.Method.Trim().ToLower().Contains("post"))
{
//写入Byte类型
if (objhttpItem.PostDataType == PostDataType.Byte)
{
//验证在得到结果时是否有传入数据
if (objhttpItem.PostdataByte != null && objhttpItem.PostdataByte.Length > 0)
{
request.ContentLength = objhttpItem.PostdataByte.Length;
request.GetRequestStream().Write(objhttpItem.PostdataByte, 0, objhttpItem.PostdataByte.Length);
}
}//写入文件
else if (objhttpItem.PostDataType == PostDataType.FilePath)
{
StreamReader r = new StreamReader(objhttpItem.Postdata, encoding);
byte[] buffer = Encoding.Default.GetBytes(r.ReadToEnd());
r.Close();
request.ContentLength = buffer.Length;
request.GetRequestStream().Write(buffer, 0, buffer.Length);
}
else
{
//验证在得到结果时是否有传入数据
if (!string.IsNullOrEmpty(objhttpItem.Postdata))
{
byte[] buffer = Encoding.Default.GetBytes(objhttpItem.Postdata);
request.ContentLength = buffer.Length;
request.GetRequestStream().Write(buffer, 0, buffer.Length);
}
}
}
}
/// <summary>
/// 设置代理
/// </summary>
/// <param name="objhttpItem">参数对象</param>
private void SetProxy(HttpItem objhttpItem)
{
if (string.IsNullOrEmpty(objhttpItem.ProxyUserName) && string.IsNullOrEmpty(objhttpItem.ProxyPwd) && string.IsNullOrEmpty(objhttpItem.ProxyIp))
{
//不需要设置
}
else
{
//设置代理服务器
WebProxy myProxy = new WebProxy(objhttpItem.ProxyIp, false);
//建议连接
myProxy.Credentials = new NetworkCredential(objhttpItem.ProxyUserName, objhttpItem.ProxyPwd);
//给当前请求对象
request.Proxy = myProxy;
//设置安全凭证
request.Credentials = CredentialCache.DefaultNetworkCredentials;
}
}
/// <summary>
/// 设置编码
/// </summary>
/// <param name="objhttpItem">Http参数</param>
private void SetEncoding(HttpItem objhttpItem)
{
if (string.IsNullOrEmpty(objhttpItem.Encoding) || objhttpItem.Encoding.ToLower().Trim() == "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);
}
}
/// <summary>
/// 设置Cookie
/// </summary>
/// <param name="objhttpItem">Http参数</param>
private void SetCookie(HttpItem objhttpItem)
{
//获取当前的cookie
if (!string.IsNullOrEmpty(objhttpItem.Cookie))
{
//Cookie
request.Headers[HttpRequestHeader.Cookie] = objhttpItem.Cookie;
}
//设置Cookie
if (objhttpItem.CookieCollection != null)
{
request.CookieContainer = new CookieContainer();
request.CookieContainer.Add(objhttpItem.CookieCollection);
}
if (objhttpItem.Cc != null)
{
request.CookieContainer = objhttpItem.Cc;
}
//request.CookieContainer = cc;
//chkCookie(cc, objhttpItem);
}
/// <summary>
/// 设置证书
/// </summary>
/// <param name="objhttpItem"></param>
private void SetCer(HttpItem objhttpItem)
{
if (!string.IsNullOrEmpty(objhttpItem.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(GetUrl(objhttpItem.URL));
//创建证书文件
X509Certificate objx509 = new X509Certificate(objhttpItem.CerPath);
//添加到请求里
request.ClientCertificates.Add(objx509);
}
else
{
//初始化对像，并设置请求的URL地址
try
{
request = (HttpWebRequest)WebRequest.Create(GetUrl(objhttpItem.URL));
}
catch
{
return;
}
}
}
/// <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 HttpResult GetHttpRequestData(HttpItem objhttpitem)
{
//返回参数
HttpResult result = new HttpResult();
try
{
#region 得到请求的response
result.CookieCollection = new CookieCollection();
response = (HttpWebResponse)request.GetResponse();
result.Header = response.Headers;
if (response.Cookies != null)
{
result.CookieCollection = response.Cookies;
}
if (response.Headers["set-cookie"] != null)
{
result.Cookie = response.Headers["set-cookie"];
}
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);
//.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
byte[] RawResponse = _stream.ToArray();
//是否返回Byte类型数据
if (objhttpitem.ResultType == ResultType.Byte)
{
result.ResultByte = RawResponse;
return result;
}
//无视编码
if (encoding == null)
{
string temp = Encoding.Default.GetString(RawResponse, 0, RawResponse.Length);
//<meta(.*?)charset([\s]?)=[^>](.*?)>
//<meta content="text/html; charset=utf-8" http-equiv="Content-Type" />
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").Split(' ')[0];
encoding = Encoding.GetEncoding(charter);
}
else
{
if (response.CharacterSet != null)
{
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);
}
}
}
}
}
//得到返回的HTML
try
{
result.Html = encoding.GetString(RawResponse);
_stream.Close();
response.Close();
}
catch
{
return null;
}
//最后释放流
#endregion
}
catch (WebException ex)
{
//这里是在发生异常时返回的错误信息
result.Html = "String Error";
response = (HttpWebResponse)ex.Response;
return result;
}
if (objhttpitem.IsToLower)
{
result.Html = result.Html;//.ToLower();
}
return result;
}
private void chkCookie(CookieContainer cc, HttpItem objhttpItem)
{
if (cc.Count > 0)
{
cool = cc.GetCookies(new Uri(objhttpItem.URL))[0].Value;
if (objhttpItem.CookieCollection != null)
{
oldcool = objhttpItem.CookieCollection[0].Value;
}
else if (newcool.Contains(oldcool) && oldcool.Length > 0 && newcool.Length > 0)
{
// throw new WebException("cookie是用户传来的上一次内容", WebExceptionStatus.UnknownError);
System.Windows.Forms.MessageBox.Show("cookie是用户传来的上一次内容");
return;
//throw new Exception("cookie是用户传来的上一次内容");
}
else if (newcool.Contains(cool) && cool.Length > 0 && newcool.Length > 0)
{
System.Windows.Forms.MessageBox.Show("本次请求的cookie与上次相同");
return;
//throw new WebException("本次请求的cookie与上次相同");
}
else
{
oldcool = cool;
newcool = oldcool;
}
}
}
