JSP to Download File

DrRakha

This program allow you to download applications from your JSP server host .
The user will not knew the locations of your files :lol:

.

Code:

/*
By : Sami & El-dib
*/


   

<%@ page  import="java.io.FileInputStream" %>
<%@ page  import="java.io.BufferedInputStream"  %>
<%@ page  import="java.io.File"  %>
<%@ page import="java.io.IOException" %>


<%

   // you  can get your base and parent from the database
   String base="e1";
   String parent="e2";   
   String filename=parent+"_codemiles.zip";
// you can  write http://localhost
   String filepath="http://www.codemiles.com/example/"+base+"/";

BufferedInputStream buf=null;
   ServletOutputStream myOut=null;

try{

myOut = response.getOutputStream( );
     File myfile = new File(filepath+filename);
     
     //set response headers
     response.setContentType("text/plain");
     
     response.addHeader(
        "Content-Disposition","attachment; filename="+filename );

     response.setContentLength( (int) myfile.length( ) );
     
     FileInputStream input = new FileInputStream(myfile);
     buf = new BufferedInputStream(input);
     int readBytes = 0;

     //read from the file; write to the ServletOutputStream
     while((readBytes = buf.read( )) != -1)
       myOut.write(readBytes);

} catch (IOException ioe){
     
        throw new ServletException(ioe.getMessage( ));
         
     } finally {
         
     //close the input/output streams
         if (myOut != null)
             myOut.close( );
          if (buf != null)
          buf.close( );
         
     }

   
   
%>
 

DrRakha

You Can use this code to hide the actual place of your files on the server so visitors can't takes links and download from your site with out visiting your web site.

ramaknallamothu

Thanks

jestinmj

thnx...but wer to get d code from??

bangarm99

thanks

fcuritiba

hi,

I need an example of a code in java that would be as follows:

In my webpage has a link to the download area (directory on my server with some files to users., Restricted area).

Do you have any examples? please ..

thanks

hugs .

fabio alonso

valeria7386

you have done good job in your site

http://www.websitedesignerschennai.com

marryanne

I suggested to give us example that we gonna know whats going on on thats code.In my webpage has a link to the download area (directory on my server with some files to users.so I just give you hint just click here under!!!!!

mas

I had use this code and its work to docx and pdf file, but i can't upload the zip file. isn't this code can download zip file as well? plz, if somebody can help me out.tq

Ikkru

Code:

<html>

<head>
<%@ page  import="java.io.FileInputStream" %>
<%@ page  import="java.io.BufferedInputStream"  %>
<%@ page  import="java.io.File"  %>
<%@ page import="java.io.IOException" %>
<%@ page import="java.util.List" %>
<%@ page import="java.net.URLConnection" %>
<%@ page import="java.io.BufferedOutputStream" %>
<%@ page import="java.util.zip.ZipOutputStream" %>
<%@ page import="java.io.FileOutputStream" %>
<%@ page import="java.util.zip.ZipEntry" %>

<%@ page import="java.io.InputStream" %>
<%@ page import="java.net.URL" %>

<%
    Object filename = request.getAttribute("filename");
    ZipOutputStream zipOut = null;
    BufferedInputStream buf = null;
    ServletOutputStream myOut = null;
    String tempFolder = System.getProperty("user.dir")+ File.separator +"upload"+ File.separator + "temp.zip";

    try {
        File inputFolder = new File(filename.toString());
        File outFolder = new File(tempFolder);
        zipOut = new ZipOutputStream(new BufferedOutputStream(
                new FileOutputStream(outFolder)));
        byte[] data = new byte[1000];
        String files[] = inputFolder.list();
        for (int i = 0; i < files.length; i++) {
            buf = new BufferedInputStream(new FileInputStream(
                    inputFolder.getPath() + "/" + files[i]), 1000);
            zipOut.putNextEntry(new ZipEntry(files[i]));
            int count;
            while ((count = buf.read(data, 0, 1000)) != -1) {
                zipOut.write(data, 0, count);
            }
            zipOut.closeEntry();
        }
        zipOut.flush();
        zipOut.close();
        myOut = response.getOutputStream();
        response.setContentType("binary/data");
        response.addHeader("Content-Disposition",
                "attachment; filename=XMLs.zip");
        try {
            URL url = new URL("file:///" + outFolder);
            URLConnection con = url.openConnection();
            buf = new BufferedInputStream(con.getInputStream());
            int readByte = 0;
            while ((readByte = buf.read()) != -1) {
                myOut.write(readByte);
            }
            buf.close();
        } catch (Exception e) {
        }
    } catch (Exception ioe) {
        throw new ServletException(ioe.getMessage());

    } finally {
        if (myOut != null)
            myOut.close();
        if (buf != null)
            buf.close();
        
    }
%>
</head>
</html> 

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