Solved

Accessing Zip Files Outside Public_HTML Folder

Posted on 2013-05-12
3
954 Views
Last Modified: 2013-05-12
I have a need to allow users to download ZIP files that reside outside the Public_HTML folder and found a PHP script that does just that - http://forums.phpfreaks.com/topic/129814-solved-accessing-images-and-files-that-are-located-outside-document-root/

It works great for PDF files but when I put a zip file in, the browser tries to save/open secure.php for some reason.  I shrunk the code down a bit as follow:

Link Page to download
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
</head>
<body >
<a href="secure.php?file=45int.zip">File Linke</a>
</body>
</html>

Open in new window


secure.php file:

<?php
  $folder = realpath('/home/rogersho/tester');
  $file = realpath($folder.'/'.$_GET['file']);
  header(sprintf("Content-type: %s;",getMimeType($file)));
  readfile($file);
  exit;

   function getMimeType ( $filename ) {
    //MIME MAP
$mime_extension_map = array(
    'pdf'           => 'application/pdf',
    'zip'           => 'application/zip'
);
    //Get Extension

    $ext = strtolower(substr($filename,strrpos($filename,'.') + 1));
    if(empty($ext))
      return 'application/octet-stream';
    elseif(isset($mime_extension_map[$ext]))
      return $mime_extension_map[$ext];
    return 'x-extension/' . $ext;
  }
?>

Open in new window

0
Comment
Question by:Jason92s
  • 2
3 Comments
 
LVL 109

Accepted Solution

by:
Ray Paseur earned 500 total points
ID: 39159998
Don't send the MIME type.  This is what I was trying to get across in the other question.  Install this script, put the name of your file in line 14, and run it.  If there is something you do not understand about it, please post back and I will try to help.

<?php // RAY_force_download.php
error_reporting(E_ALL);
ini_set('display_errors', TRUE);
ini_set('log_errors',     TRUE);


// DEMONSTRATE HOW TO CAUSE A FILE DOWNLOAD


// REQUIRED FOR USE WITH THE PHP date() FUNCTIONS
date_default_timezone_set('America/New_York');

// A FILE TO DOWNLOAD - THIS LINK COULD COME IN THE URL VIA $_GET, OR COULD BE GENERATED INSIDE THE SCRIPT
$url = "http://www.LAPRBass.com/RAY_short_text_file.txt";

// THE USE CASE FOR THE FUNCTION
force_download($url);


// FUNCTION TO FORCE A DOWNLOAD FROM A FILE
function force_download($filename)
{
    // GET THE CONTENTS OF THE FILE
    $filedata = @file_get_contents($filename);

    // SUCCESS
    if ($filedata)
    {
        // GET A NAME FOR THE FILE
        $basename = basename($filename);

        // THESE HEADERS ARE USED ON ALL BROWSERS
        header("Content-Type: application-x/force-download");
        header("Content-Disposition: attachment; filename=$basename");
        header("Content-length: ".(string)(strlen($filedata)));
        header("Expires: ".gmdate("D, d M Y H:i:s", mktime(date("H")+2, date("i"), date("s"), date("m"), date("d"), date("Y")))." GMT");
        header("Last-Modified: ".gmdate("D, d M Y H:i:s")." GMT");

        // THIS HEADER MUST BE OMITTED FOR IE 6+
        if (FALSE === strpos($_SERVER["HTTP_USER_AGENT"], 'MSIE '))
        {
            header("Cache-Control: no-cache, must-revalidate");
        }

        // THIS IS THE LAST HEADER
        header("Pragma: no-cache");

        // FLUSH THE HEADERS TO THE BROWSER
        flush();

        // WRITE THE FILE
        echo $filedata;
    }

    // ERROR
    else
    {
        trigger_error("ERROR: UNABLE TO OPEN $filename", E_USER_ERROR);
    }
}

Open in new window

0
 

Author Comment

by:Jason92s
ID: 39160013
Oh, now I see what you're saying.  Perfect, works great, thank you.
0
 
LVL 109

Expert Comment

by:Ray Paseur
ID: 39160134
Great!  Thanks for the points and good luck with the project, ~Ray
0

Featured Post

Windows Server 2016: All you need to know

Learn about Hyper-V features that increase functionality and usability of Microsoft Windows Server 2016. Also, throughout this eBook, you’ll find some basic PowerShell examples that will help you leverage the scripts in your environments!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
PHP strings vs array errors 13 32
Dynamic Dropdowns 15 32
What do the parameters in the PDO function debugDumpParams mean? 1 34
Wordpress Pagination 1 28
These days socially coordinated efforts have turned into a critical requirement for enterprises.
Since pre-biblical times, humans have sought ways to keep secrets, and share the secrets selectively.  This article explores the ways PHP can be used to hide and encrypt information.
Learn how to match and substitute tagged data using PHP regular expressions. Demonstrated on Windows 7, but also applies to other operating systems. Demonstrated technique applies to PHP (all versions) and Firefox, but very similar techniques will w…
This tutorial will teach you the core code needed to finalize the addition of a watermark to your image. The viewer will use a small PHP class to learn and create a watermark.

809 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question