friendica_2021-01/mod/attach.php

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<?php
require_once('include/security.php');
function attach_init(App &$a) {
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if($a->argc != 2) {
notice( t('Item not available.') . EOL);
return;
}
$item_id = intval($a->argv[1]);
// Check for existence, which will also provide us the owner uid
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$r = q("SELECT * FROM `attach` WHERE `id` = %d LIMIT 1",
intval($item_id)
);
if (! dbm::is_result($r)) {
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notice( t('Item was not found.'). EOL);
return;
}
$sql_extra = permissions_sql($r[0]['uid']);
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// Now we'll see if we can access the attachment
$r = q("SELECT * FROM `attach` WHERE `id` = '%d' $sql_extra LIMIT 1",
dbesc($item_id)
);
if (! dbm::is_result($r)) {
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notice( t('Permission denied.') . EOL);
return;
}
// Use quotes around the filename to prevent a "multiple Content-Disposition"
// error in Chrome for filenames with commas in them
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header('Content-type: ' . $r[0]['filetype']);
header('Content-length: ' . $r[0]['filesize']);
if(isset($_GET['attachment']) && $_GET['attachment'] === '0')
header('Content-disposition: filename="' . $r[0]['filename'] . '"');
else
header('Content-disposition: attachment; filename="' . $r[0]['filename'] . '"');
echo $r[0]['data'];
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killme();
// NOTREACHED
}