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<?php
/*
Question2Answer by Gideon Greenspan and contributors
http://www.question2answer.org/
Description: Response to blob requests, outputting blob from the database
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
More about this license: http://www.question2answer.org/license.php
*/
// Ensure no PHP errors are shown in the blob response
@ini_set('display_errors', 0);
function qa_blob_db_fail_handler()
{
qa_500();
qa_exit('error');
}
// Load the Q2A base file which sets up a bunch of crucial stuff
$qa_autoconnect = false;
require 'qa-base.php';
qa_report_process_stage('init_blob');
// Output the blob in question
require_once QA_INCLUDE_DIR . 'app/blobs.php';
$qa_db->connect('qa_blob_db_fail_handler');
qa_initialize_postdb_plugins();
$blob = qa_read_blob(qa_get('qa_blobid'));
if (isset($blob) && isset($blob['content'])) {
// allows browsers and proxies to cache the blob (30 days)
header('Cache-Control: max-age=2592000, public');
$disposition = 'inline';
switch ($blob['format']) {
case 'jpeg':
case 'jpg':
header('Content-Type: image/jpeg');
break;
case 'gif':
header('Content-Type: image/gif');
break;
case 'png':
header('Content-Type: image/png');
break;
case 'pdf':
header('Content-Type: application/pdf');
break;
case 'swf':
header('Content-Type: application/x-shockwave-flash');
break;
default:
header('Content-Type: application/octet-stream');
$disposition = 'attachment';
break;
}
// for compatibility with HTTP headers and all browsers
$filename = preg_replace('/[^A-Za-z0-9 \\._-]+/', '', $blob['filename']);
header('Content-Disposition: ' . $disposition . '; filename="' . $filename . '"');
echo $blob['content'];
} else {
qa_404();
}
$qa_db->disconnect();