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<?php
require('../constants.php');
require(LIB_PATH . '/favicons.php');
require(LIB_PATH . '/http-conditional.php');
function show_default_favicon($cacheSeconds = 3600) {
global $default_favicon;
header('Content-Disposition: inline; filename="default_favicon.ico"');
$default_mtime = @filemtime($default_favicon);
if (!httpConditional($default_mtime, $cacheSeconds, 2)) {
readfile($default_favicon);
}
}
$id = isset($_SERVER['QUERY_STRING']) ? $_SERVER['QUERY_STRING'] : '0';
if (!ctype_xdigit($id)) {
$id = '0';
}
$txt = $favicons_dir . $id . '.txt';
$ico = $favicons_dir . $id . '.ico';
$ico_mtime = @filemtime($ico);
$txt_mtime = @filemtime($txt);
header('Content-Type: image/x-icon');
if ($ico_mtime == false || $ico_mtime < $txt_mtime || ($ico_mtime < time() - (rand(15, 20) * 86400))) {
if ($txt_mtime == false) {
show_default_favicon(1800);
exit();
}
// no ico file or we should download a new one.
$url = file_get_contents($txt);
if (!download_favicon($url, $ico)) {
// Download failed
if ($ico_mtime == false) {
show_default_favicon(86400);
exit();
} else {
touch($ico);
}
}
}
header('Content-Disposition: inline; filename="' . $id . '.ico"');
if (!httpConditional($ico_mtime, rand(14, 21) * 86400, 2)) {
readfile($ico);
}
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