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Basic check to fix #1 #22

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Basic check to fix #1 #22

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27 changes: 15 additions & 12 deletions imageDownload.php
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Original file line number Diff line number Diff line change
@@ -1,16 +1,19 @@
<?php
$file = $_REQUEST['imageUrl'];
if(!$file){
// File doesn't exist, output error
die('file not found');
}else{
// Set headers
header("Cache-Control: public");
header("Content-Description: File Transfer");
header("Content-Disposition: attachment; filename=$file");
header("Content-Type: image/gif");
header("Content-Transfer-Encoding: binary");
// Read the file from disk
readfile($file);

//Check the scheme ://, http:// or https:// followed by a valid hostname name start
$validHTTPURLBegin = '/^(:|http(s?):)\/\/[\w]+/';
if (!preg_match($validHTTPURLBegin, $file)) {
die('File is not a valid URL');
}

// Set headers
header("Cache-Control: public");
header("Content-Description: File Transfer");
header("Content-Disposition: attachment; filename=$file");
header("Content-Type: image/gif");
header("Content-Transfer-Encoding: binary");
// Read the file from disk
readfile($file);

?>