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34d8be086c
http://php.net/manual/en/function.mt-rand.php from php Doc "Many random number generators of older libcs have dubious or unknown characteristics and are slow. The mt_rand() function is a drop-in replacement for the older rand(). It uses a random number generator with known characteristics using the » Mersenne Twister, which will produce random numbers four times faster than what the average libc rand() provides. "
55 lines
1.3 KiB
PHP
55 lines
1.3 KiB
PHP
<?php
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require(__DIR__ . '/../constants.php');
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require(LIB_PATH . '/lib_rss.php'); //Includes class autoloader
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require(LIB_PATH . '/favicons.php');
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require(LIB_PATH . '/http-conditional.php');
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function show_default_favicon($cacheSeconds = 3600) {
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global $default_favicon;
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header('Content-Disposition: inline; filename="default_favicon.ico"');
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$default_mtime = @filemtime($default_favicon);
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if (!httpConditional($default_mtime, $cacheSeconds, 2)) {
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readfile($default_favicon);
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}
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}
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$id = isset($_SERVER['QUERY_STRING']) ? $_SERVER['QUERY_STRING'] : '0';
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if (!ctype_xdigit($id)) {
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$id = '0';
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}
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$txt = $favicons_dir . $id . '.txt';
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$ico = $favicons_dir . $id . '.ico';
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$ico_mtime = @filemtime($ico);
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$txt_mtime = @filemtime($txt);
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header('Content-Type: image/x-icon');
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if ($ico_mtime == false || $ico_mtime < $txt_mtime || ($ico_mtime < time() - (mt_rand(15, 20) * 86400))) {
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if ($txt_mtime == false) {
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show_default_favicon(1800);
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exit();
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}
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// no ico file or we should download a new one.
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$url = file_get_contents($txt);
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if (!download_favicon($url, $ico)) {
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// Download failed
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if ($ico_mtime == false) {
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show_default_favicon(86400);
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exit();
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} else {
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touch($ico);
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}
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}
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}
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header('Content-Disposition: inline; filename="' . $id . '.ico"');
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if (!httpConditional($ico_mtime, mt_rand(14, 21) * 86400, 2)) {
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readfile($ico);
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}
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