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From siom...@portosdobrasil.gov.br
Subject RE: RES: Problems downloading files. How to identify the CANCEL b utto n?
Date Sun, 12 Jul 2009 02:31:41 GMT
Sure:

package servlets.comum;

import java.io.*;

import javax.servlet.*;
import javax.servlet.http.*;

import comum.ArquivoGestor;

/**
 * Definition of class DownloadFile.
 */
public class DownloadFile extends HttpServlet
{
    private String original_filename = "MYFILE.txt";
    private String filename="C:\\ABC.txt";
    
    ArquivoGestor arquivoGestor;
    
    /**
     * 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 );
   
        //
        //  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 + "\"" );
   
        //
        //  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);
        }
 
        in.close();
        op.flush();
        op.close();
        
        // The lines bellow will retrieve information from request and
        // register them into the database (interested user ID/file ID/ and
        // licitation ID). The problem, as I said, is that by the time the
        // download manager window (that this code displays) shows up the
        // entire code has been already executed.
        int interessadoID = Integer.parseInt(request.getParameter("int"));
        int arquivoID = Integer.parseInt(request.getParameter("arq"));
        int licitacaoID = Integer.parseInt(request.getParameter("lic"));
        
        arquivoGestor = new ArquivoGestor();

        arquivoGestor.registerLicitacaoDownoad(interessadoID, arquivoID,
licitacaoID);
    }
    
    /**
     * 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);
    }
}

-----Mensagem original-----
De: Martin Gainty
Para: Tomcat Users List
Enviada em: 10/07/2009 22:45
Assunto: RE: RES: Problems downloading files. How to identify the CANCEL
butto n?


yes
Op: could you display the jsp
?
Martin Gainty 

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