实例介绍
【实例简介】
【实例截图】
【核心代码】
public class HttpHelper
{
#region 私有变量
private CookieContainer cc;
private string contentType = "application/x-www-form-urlencoded";
private string accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/x-silverlight, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-ms-application, application/x-ms-xbap, application/vnd.ms-xpsdocument, application/xaml xml, application/x-silverlight-2-b1, */*";
private string userAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022)";
private Encoding encoding = Encoding.GetEncoding("utf-8");
private int delay = 3000;
private int maxTry = 3;
private int currentTry = 0;
#endregion
public static FrmValidateCode frmValidateCode;
#region 属性
/// <summary>
/// Cookie容器
/// </summary>
public CookieContainer CookieContainer
{
get
{
return cc;
}
}
/// <summary>
/// 获取网页源码时使用的编码
/// </summary>
/// <value></value>
public Encoding Encoding
{
get
{
return encoding;
}
set
{
encoding = value;
}
}
public int NetworkDelay
{
get
{
Random r = new Random();
return (r.Next(delay / 1000, delay / 1000 * 2)) * 1000;
}
set
{
delay = value;
}
}
public int MaxTry
{
get
{
return maxTry;
}
set
{
maxTry = value;
}
}
#endregion
#region 构造函数
/// <summary>
/// Initializes a new instance of the <see cref="HttpHelper"/> class.
/// </summary>
public HttpHelper()
{
cc = new CookieContainer();
}
/// <summary>
/// Initializes a new instance of the <see cref="HttpHelper"/> class.
/// </summary>
/// <param name="cc">The cc.</param>
public HttpHelper(CookieContainer cc)
{
this.cc = cc;
}
/// <summary>
/// Initializes a new instance of the <see cref="HttpHelper"/> class.
/// </summary>
/// <param name="contentType">Type of the content.</param>
/// <param name="accept">The accept.</param>
/// <param name="userAgent">The user agent.</param>
public HttpHelper(string contentType, string accept, string userAgent)
{
this.contentType = contentType;
this.accept = accept;
this.userAgent = userAgent;
}
/// <summary>
/// Initializes a new instance of the <see cref="HttpHelper"/> class.
/// </summary>
/// <param name="cc">The cc.</param>
/// <param name="contentType">Type of the content.</param>
/// <param name="accept">The accept.</param>
/// <param name="userAgent">The user agent.</param>
public HttpHelper(CookieContainer cc, string contentType, string accept, string userAgent)
{
this.cc = cc;
this.contentType = contentType;
this.accept = accept;
this.userAgent = userAgent;
}
#endregion
#region 公共方法
/// <summary>
/// 获取指定页面的HTML代码
/// </summary>
/// <param name="url">指定页面的路径</param>
/// <param name="postData">回发的数据</param>
/// <param name="isPost">是否以post方式发送请求</param>
/// <param name="cookieCollection">Cookie集合</param>
/// <returns></returns>
public string GetHtml(string url, string postData, bool isPost, CookieContainer cookieContainer)
{
if (string.IsNullOrEmpty(postData))
{
return GetHtml(url, cookieContainer);
}
currentTry ;
try
{
byte[] byteRequest = Encoding.Default.GetBytes(postData);
HttpWebRequest httpWebRequest;
httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(url);
httpWebRequest.CookieContainer = cookieContainer;
httpWebRequest.ContentType = contentType;
httpWebRequest.Referer = url;
httpWebRequest.Accept = accept;
httpWebRequest.UserAgent = userAgent;
httpWebRequest.Method = isPost ? "POST" : "GET";
httpWebRequest.ContentLength = byteRequest.Length;
Stream stream = httpWebRequest.GetRequestStream();
stream.Write(byteRequest, 0, byteRequest.Length);
stream.Close();
HttpWebResponse httpWebResponse;
httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
Stream responseStream = httpWebResponse.GetResponseStream();
StreamReader streamReader = new StreamReader(responseStream, encoding);
string html = streamReader.ReadToEnd();
streamReader.Close();
responseStream.Close();
currentTry = 0;
if (html.Contains("validateCode"))
{
if (string.IsNullOrEmpty(QQ.FriendQQ))
{
QQ.FriendQQ = QQ.CurrentQQ;
}
if (frmValidateCode == null)
{
frmValidateCode = new FrmValidateCode();//将主窗体对象传递过去
frmValidateCode.ShowDialog();
}
else
{
frmValidateCode.Activate();
if (!frmValidateCode.Visible)
{
frmValidateCode.ShowDialog();
}
}
return null;
}
new Log().WriteLog(html); //记录每一次请求的html代码
return html;
}
catch (Exception e)
{
//Console.ForegroundColor = ConsoleColor.Red;
//Console.WriteLine(DateTime.Now.ToString("HH:mm:ss ") e.Message);
//Console.ForegroundColor = ConsoleColor.White;
//if (currentTry <= maxTry)
//{
// GetHtml(url, postData, isPost, cookieContainer);
//}
//currentTry = 0;
return string.Empty;
}
}
/// <summary>
/// 获取指定页面的HTML代码
/// </summary>
/// <param name="url">指定页面的路径</param>
/// <param name="cookieCollection">Cookie集合</param>
/// <returns></returns>
public string GetHtml(string url, CookieContainer cookieContainer)
{
Thread.Sleep(NetworkDelay);
currentTry ;
try
{
HttpWebRequest httpWebRequest;
httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(url);
httpWebRequest.CookieContainer = cookieContainer;
httpWebRequest.ContentType = contentType;
httpWebRequest.Referer = url;
httpWebRequest.Accept = accept;
httpWebRequest.UserAgent = userAgent;
httpWebRequest.Method = "GET";
HttpWebResponse httpWebResponse;
httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
Stream responseStream = httpWebResponse.GetResponseStream();
StreamReader streamReader = new StreamReader(responseStream, encoding);
string html = streamReader.ReadToEnd();
streamReader.Close();
responseStream.Close();
currentTry = 0;
if (html.Contains("validateCode"))
{
if (string.IsNullOrEmpty(QQ.FriendQQ))
{
QQ.FriendQQ = QQ.CurrentQQ;
}
if (frmValidateCode == null)
{
frmValidateCode = new FrmValidateCode();//将主窗体对象传递过去
frmValidateCode.ShowDialog();
}
else
{
frmValidateCode.Activate();
if (!frmValidateCode.Visible)
{
frmValidateCode.ShowDialog();
}
}
return null;
}
return html;
}
catch (Exception e)
{
//Console.ForegroundColor = ConsoleColor.Red;
//Console.WriteLine(DateTime.Now.ToString("HH:mm:ss ") e.Message);
//Console.ForegroundColor = ConsoleColor.White;
//if (currentTry <= maxTry)
//{
// GetHtml(url, cookieContainer);
//}
//currentTry = 0;
return string.Empty;
}
}
/// <summary>
/// 获取指定页面的HTML代码
/// </summary>
/// <param name="url">指定页面的路径</param>
/// <returns></returns>
public string GetHtml(string url)
{
return GetHtml(url, cc);
}
/// <summary>
/// 获取指定页面的HTML代码
/// </summary>
/// <param name="url">指定页面的路径</param>
/// <param name="postData">回发的数据</param>
/// <param name="isPost">是否以post方式发送请求</param>
/// <returns></returns>
public string GetHtml(string url, string postData, bool isPost)
{
return GetHtml(url, postData, isPost, cc);
}
/// <summary>
/// 获取指定页面的Stream
/// </summary>
/// <param name="url">指定页面的路径</param>
/// <param name="postData">回发的数据</param>
/// <param name="isPost">是否以post方式发送请求</param>
/// <param name="cookieCollection">Cookie集合</param>
/// <returns></returns>
public Stream GetStream(string url, CookieContainer cookieContainer)
{
currentTry ;
try
{
HttpWebRequest httpWebRequest;
httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(url);
httpWebRequest.CookieContainer = cookieContainer;
httpWebRequest.ContentType = contentType;
httpWebRequest.Referer = url;
httpWebRequest.Accept = accept;
httpWebRequest.UserAgent = userAgent;
httpWebRequest.Method = "GET";
HttpWebResponse httpWebResponse;
httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
Stream responseStream = httpWebResponse.GetResponseStream();
currentTry = 0;
CookieCollection cc = cookieContainer.GetCookies(new Uri(url));
return responseStream;
}
catch (Exception e)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine(DateTime.Now.ToString("HH:mm:ss ") e.Message);
Console.ForegroundColor = ConsoleColor.White;
if (currentTry <= maxTry)
{
GetHtml(url, cookieContainer);
}
currentTry = 0;
return null;
}
}
#endregion
}
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