c# 获取网站验证码图片

代码

/// <summary>
/// 获取网页验证码
/// </summary>
/// <param name="server"> 服务器地址 </param>
/// <param name="URL"> 网页地址 </param>
/// <param name="byteRequest"> 字节数组，存放图片字节 </param>
/// <param name="cookie"> 网站分配给客户的临时sessionid（临时cookie值），并非真正cookie </param>
/// <param name="header"></param>
/// <returns> 图片的二进制数组 </returns>
public static byte [] GetHtmlByBytes( string server, string URL, byte [] byteRequest, string cookie, out string header)
{
long contentLength;
HttpWebRequest httpWebRequest;
HttpWebResponse webResponse;
Stream getStream;

httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(URL);
CookieContainer co = new CookieContainer();
co.SetCookies( new Uri(server), cookie);
httpWebRequest.CookieContainer = co;
httpWebRequest.ContentType = " application/x-www-form-urlencoded " ;
httpWebRequest.Method = " Post " ;
httpWebRequest.ContentLength = byteRequest.Length;
Stream stream;
stream = httpWebRequest.GetRequestStream();
stream.Write(byteRequest, 0 , byteRequest.Length);
stream.Close();
webResponse = (HttpWebResponse)httpWebRequest.GetResponse();
header = webResponse.Headers.ToString();
getStream = webResponse.GetResponseStream();
contentLength = webResponse.ContentLength;

byte [] outBytes = new byte [contentLength];
outBytes = ReadFully(getStream);
getStream.Close();
return outBytes;
}

转载于:https://www.cnblogs.com/daretodream/archive/2010/03/30/1700722.html