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Suggestion: Download link for images

Bjarne Varöystrand

Feb 19, 2015 06:52PM EST

To day, if I'm right, the visitor will get a direct link to the image to download ex:
www.sitename.com/storage/cache/images/000/xxx/some.image.name.jpg

This looks a bit "tacky" and could also be a potential security threat...

What about parsing the download link through some php, ex:
<?php

// place this code inside a php file and call it f.e. "download.php"
$path = $_SERVER['DOCUMENT_ROOT']."/path2file/"; // change the path to fit your websites document structure
$fullPath = $path.$_GET['download_file'];

if ($fd = fopen ($fullPath, "r")) {
$fsize = filesize($fullPath);
$path_parts = pathinfo($fullPath);
$ext = strtolower($path_parts["extension"]);
switch ($ext) {
case "pdf":
header("Content-type: application/pdf"); // add here more headers for diff. extensions
header("Content-Disposition: attachment; filename=\"".$path_parts["basename"]."\""); // use 'attachment' to force a download
break;
default;
header("Content-type: application/octet-stream");
header("Content-Disposition: filename=\"".$path_parts["basename"]."\"");
}
header("Content-length: $fsize");
header("Cache-control: private"); //use this to open files directly
while(!feof($fd)) {
$buffer = fread($fd, 2048);
echo $buffer;
}
}
fclose ($fd);
exit;
// example: place this kind of link into the document where the file download is offered:
// <a href="download.php?download_file=some_file.pdf">Download here</a>
?>

This way the visitor will never see the true link to the image, and the image will be "forced" to be downloaded instead of as to day, where he/she have to right click the images to download, and then hitting the back button to continue browsing the site.

Just a thought

Best regards Bjarne

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