Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
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friendica/mod/attach.php

73 lines
1.6 KiB

12 years ago
<?php
function attach_init(&$a) {
if($a->argc != 2) {
notice( t('Item not available.') . EOL);
return;
}
$item_id = intval($a->argv[1]);
$r = q("SELECT * FROM `attach` WHERE `id` = %d LIMIT 1",
intval($item_id)
);
if(! count($r)) {
notice( t('Item was not found.'). EOL);
return;
}
$owner = $r[0]['uid'];
$sql_extra = " AND `allow_cid` = '' AND `allow_gid` = '' AND `deny_cid` = '' AND `deny_gid` = '' ";
if(local_user() && ($owner == $_SESSION['uid'])) {
// Owner can always see his/her photos
$sql_extra = '';
}
elseif(remote_user()) {
// authenticated visitor - here lie dragons
$groups = init_groups_visitor($_SESSION['visitor_id']);
$gs = '<<>>'; // should be impossible to match
if(count($groups)) {
foreach($groups as $g)
$gs .= '|<' . intval($g) . '>';
}
$sql_extra = sprintf(
" AND ( `allow_cid` = '' OR `allow_cid` REGEXP '<%d>' )
AND ( `deny_cid` = '' OR NOT `deny_cid` REGEXP '<%d>' )
AND ( `allow_gid` = '' OR `allow_gid` REGEXP '%s' )
AND ( `deny_gid` = '' OR NOT `deny_gid` REGEXP '%s') ",
intval($_SESSION['visitor_id']),
intval($_SESSION['visitor_id']),
dbesc($gs),
dbesc($gs)
);
}
// 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(count($r)) {
$data = $r[0]['data'];
}
else {
notice( t('Permission denied.') . EOL);
return;
}
header('Content-type: ' . $r[0]['filetype']);
header('Content-disposition: attachment; filename=' . $r[0]['filename']);
echo $data;
killme();
// NOTREACHED
}