public void ProcessRequest(HttpContext context)
{
string title = sui.Title;
string su = sui.SourceUrl;  //全文下载链接地址

context.Response.Clear();
context.Response.ContentType = "application/pdf";
context.Response.ContentEncoding = Encoding.UTF8;
context.Response.Charset = "utf-8";
context.Response.AddHeader("Content-Disposition", "attachment; filename=" +HttpUtility.UrlEncode(title+".pdf",Encoding.UTF8));
if (su.Contains("ftp"))
{
string userName = "";
string password = "";
FtpDownload(context, su, userName, password);
}
else
{
HttpDownload(context, su);
}
}
private static void FtpDownload(HttpContext context, string fileUrl, string userName, string password)
{
try
{
byte[] result;
byte[] buffer = new byte[4096];
Uri filepath = new Uri(fileUrl);
FtpWebRequest reqFTP = (FtpWebRequest)FtpWebRequest.Create(filepath);
reqFTP.Method = WebRequestMethods.Ftp.DownloadFile;
reqFTP.UseBinary = true;
reqFTP.Credentials = new NetworkCredential(userName, password);
using (FtpWebResponse response = (FtpWebResponse)reqFTP.GetResponse())
{
using (Stream responseStream = response.GetResponseStream())
{
using (MemoryStream memoryStream = new MemoryStream())
{
int count = 0;
do
{
count = responseStream.Read(buffer, 0, buffer.Length);
memoryStream.Write(buffer, 0, count);
} while (count != 0);
result = memoryStream.ToArray();
HttpContext.Current.Response.AddHeader("Content-Length", result.Length.ToString());
memoryStream.WriteTo(context.Response.OutputStream);
memoryStream.Close();
context.Response.OutputStream.Flush();
context.Response.Flush();
}
}
}
}
catch (Exception ex)
{
Exceptions.LogException(ex);
}
}
private static void HttpDownload(HttpContext context, string httpUrl)
{
try
{
byte[] buffer = new byte[4096];
HttpWebRequest reqHTTP = (HttpWebRequest)WebRequest.Create(httpUrl);
using (HttpWebResponse response = (HttpWebResponse)reqHTTP.GetResponse())
{
using (Stream responseStream = response.GetResponseStream())
{
using (MemoryStream memoryStream = new MemoryStream())
{
int count = 0;
do
{
count = responseStream.Read(buffer, 0, buffer.Length);
memoryStream.Write(buffer, 0, count);
} while (count != 0);
byte[] result = memoryStream.ToArray();
HttpContext.Current.Response.AddHeader("Content-Length", result.Length.ToString());
memoryStream.WriteTo(context.Response.OutputStream);
memoryStream.Close();
context.Response.OutputStream.Flush();
context.Response.Flush();
}
}
}
}
catch (Exception ex)
{
Exceptions.LogException(ex);
}
}