Dear all,
I need to log some information only after a user downloads or opens a file.
I am using a servlet for that and the download part works fine.
However I need to identify which button was clicked because in case the user
clicks [CANCEL] I am not supposed to register any information.
I put lots of messages on the code to understand how it works and even if I
click [CANCEL] the messages will be printed showing that all commands will
be executed no matter which button was clicked.
Can someone help me to identify which button was clicked?
Thanks
Siomara
===================
package servlets.comum;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
/**
* Definition of class DownloadFile.
*/
public class DownloadFile extends HttpServlet
{
private String original_filename = "MYFILE.txt";
private String filename="C:\\ABC.txt";
/**
* Processes requests for both HTTP >GET and POST methods.
* @param request servlet request
* @param response servlet response
*/
protected void processRequest(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException
{
File f = new File(filename);
int length = 0;
ServletOutputStream op = response.getOutputStream();
ServletContext context =
getServletConfig().getServletContext();
String mimetype = context.getMimeType( filename );
System.out.println("here 1");
// Set the response and go!
response.setContentType( (mimetype != null) ? mimetype :
"application/octet-stream" );
response.setContentLength( (int)f.length() );
response.setHeader( "Content-Disposition", "attachment; filename=\""
+ original_filename + "\"" );
System.out.println("here 2");
// Stream to the requester.
byte[] bbuf = new byte[filename.length()];
DataInputStream in = new DataInputStream(new FileInputStream(f));
while ((in != null) && ((length = in.read(bbuf)) != -1))
{
op.write(bbuf,0,length);
}
System.out.println("here 3");
in.close();
System.out.println("here 4");
op.flush();
System.out.println("here 5");
op.close();
System.out.println("here 6");
}
/**
* Handles the HTTP GET method.
* @param request servlet request
* @param response servlet response
*/
protected void doGet(HttpServletRequest request, HttpServletResponse
response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Handles the HTTP POST method.
* @param request servlet request
* @param response servlet response
*/
protected void doPost(HttpServletRequest request, HttpServletResponse
response)
throws ServletException, IOException {
processRequest(request, response);
}
/**
* Returns a short description of the servlet.
*/
public String getServletInfo() {
return "Short description";
}
}
==============================
Results:
[Tue Jul 07 10:39:43 BRT 2009] info: postgres: Opened a new connection
[Tue Jul 07 10:39:43 BRT 2009] info: postgres: Delivered connection from
pool
select arquivolicitacao.licitacaoid, arquivolicitacao.arquivoid,
arquivo.tipoarquivoid, arquivo.tituloapresentacao, arquivo.nomeinterno,
arquivo.localizacaofisica, arquivo.datapublicacaodou, tipoarquivo.descricao
from arquivolicitacao, arquivo, tipoarquivo where
arquivolicitacao.licitacaoid = 5 and arquivolicitacao.arquivoid =
arquivo.arquivoid and arquivo.tipoarquivoid = tipoarquivo.tipoarquivoid
order by datapublicacaodou desc
here 1
here 2
here 3
here 4
here 5
here 6
