C# 破解防盗链
C#版本 java类似 流用法略不同
private void WriteFile(byte[] info, string fullpath)
{
FileStream fs = null;
BinaryWriter w = null;
try
{
//string name = DateTime.Now.ToString("yyyy-MM-dd HH.mm.ss.ffffff") + ".html";
//string path = Path.Combine(HttpContext.Current.Request.PhysicalApplicationPath, "MN\\" + name);
fs = new FileStream(fullpath, FileMode.CreateNew, FileAccess.ReadWrite);
// 转换为字节 写入数据 ( 可写入中文 )
//Byte[] info = Encoding.GetEncoding("GB2312").GetBytes(content);
// 字节数组 , 字节偏移量 , 最多写入的字节数
w = new BinaryWriter(fs);
// 设置要写入的偏移量
fs.Position = fs.Length;
fs.Write(info, 0, info.Length);
}
finally
{
if (w != null)
w.Close();
if (fs != null)
fs.Close();
}
}
private void imgService(HttpContext context)
{
HttpRequest request = context.Request;
HttpResponse response = context.Response;
string url = request.QueryString["url"];
string fileName = url.GetHashCode().ToString()+".gif";
string ipaddress = System.Configuration.ConfigurationManager.AppSettings["ipaddress"];
//string path = System.Configuration.ConfigurationManager.AppSettings["path"];
string savePath = URLUtil.getDomainName(url).Replace(".", "_");//保存的文件夹
//string fileName = url.Substring(url.LastIndexOf("/")+1);//保存的文件名
string savename = context.Server.MapPath("imgs") + "\\" + savePath + "\\" + fileName;
if (!File.Exists(savename))
{
HttpWebRequest webrequest = (HttpWebRequest)WebRequest.Create(url);
webrequest.Accept = "image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/x-silverlight, application/x-ms-application, application/x-ms-xbap, application/vnd.ms-xpsdocument, application/xaml+xml, application/QVOD, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*";
webrequest.Headers.Add("Accept-Encoding", "gzip, deflate");
webrequest.Headers.Add("Accept-Language", "zh-cn");
webrequest.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; MS-RTC LM 8; Alexa Toolbar)";
webrequest.Headers.Add("UA-CPU", "x86");
webrequest.KeepAlive = true;
HttpWebResponse webresponse = (HttpWebResponse)webrequest.GetResponse();
if (webresponse.StatusCode == HttpStatusCode.OK)
{
// System.Drawing.Image image = System.Drawing.Image.FromStream(webresponse.GetResponseStream());
Stream st = webresponse.GetResponseStream();
BinaryReader br = new BinaryReader(st);
byte[] poto = br.ReadBytes(4096+(int)webresponse.ContentLength);
if (!System.IO.Directory.Exists(context.Server.MapPath("imgs") + "\\" + savePath))
{
System.IO.Directory.CreateDirectory(context.Server.MapPath("imgs") + "\\" + savePath);
}
WriteFile(poto, savename);
/*string ct=webresponse.ContentType.ToLower();
if (ct.IndexOf("gif") > 0)
{
//image.Save(savename);
}
else
{
//image.Save(savename, System.Drawing.Imaging.ImageFormat.Gif);//保存路径
}
//image.Dispose();//释放资源 */
}
}
response.Redirect(ipaddress +savePath+"/"+ fileName);
}