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<?php
/**
* Elgg profile icon cache/bypass
*
*
* @package ElggProfile
*/
// Get DB settings
require_once(dirname(dirname(dirname(__FILE__))). '/engine/settings.php');
global $CONFIG;
$join_date = (int)$_GET['joindate'];
$last_cache = (int)$_GET['lastcache']; // icontime
$guid = (int)$_GET['guid'];
// If is the same ETag, content didn't changed.
$etag = $last_cache . $guid;
if (isset($_SERVER['HTTP_IF_NONE_MATCH']) && trim($_SERVER['HTTP_IF_NONE_MATCH']) == $etag) {
header("HTTP/1.1 304 Not Modified");
exit;
}
$size = strtolower($_GET['size']);
if (!in_array($size, array('large', 'medium', 'small', 'tiny', 'master', 'topbar'))) {
$size = "medium";
}
$mysql_dblink = @mysql_connect($CONFIG->dbhost, $CONFIG->dbuser, $CONFIG->dbpass, true);
if ($mysql_dblink) {
if (@mysql_select_db($CONFIG->dbname, $mysql_dblink)) {
$result = mysql_query("select name, value from {$CONFIG->dbprefix}datalists where name='dataroot'", $mysql_dblink);
if ($result) {
$row = mysql_fetch_object($result);
while ($row) {
if ($row->name == 'dataroot') {
$data_root = $row->value;
}
$row = mysql_fetch_object($result);
}
}
@mysql_close($mysql_dblink);
if (isset($data_root)) {
// this depends on ElggDiskFilestore::makeFileMatrix()
$user_path = date('Y/m/d/', $join_date) . $guid;
$filename = "$data_root$user_path/profile/{$guid}{$size}.jpg";
$contents = @file_get_contents($filename);
if (!empty($contents)) {
header("Content-type: image/jpeg");
header('Expires: ' . date('r', strtotime("+6 months")), true);
header("Pragma: public");
header("Cache-Control: public");
header("Content-Length: " . strlen($contents));
header("ETag: $etag");
// this chunking is done for supposedly better performance
$split_string = str_split($contents, 1024);
foreach ($split_string as $chunk) {
echo $chunk;
}
exit;
}
}
}
}
// something went wrong so load engine and try to forward to default icon
require_once(dirname(dirname(dirname(__FILE__))) . "/engine/start.php");
elgg_log("Profile icon direct failed.", "WARNING");
forward("_graphics/icons/user/default{$size}.gif");
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