朽木

define( 'PATH', dirname(__FILE__) . '/' );
 
//截取对应字段
$url = $_SERVER["REQUEST_URI"];
preg_match_all("/(avatar\/\?)(.*?)(\?s=)/", $url, $key);
$key = $key['2']['0'];
$key = (isset($key) && ctype_alnum($key) ? $key : '07b979c71a73f11087a78102b320fe14');
preg_match_all("/(s=)(.*?)(&d=)/", $url, $s);
$s = $s['2']['0'];
$s = (isset($s) && is_numeric($s) ? $s : 32);
$r = substr ($url, -1);
$r = (isset($r) && ctype_alnum($r) ? $r : 'G');
$d = PATH . "07b979c71a73f11087a78102b320fe14.dat"; //默认头像
 
$gravatar_cache = PATH . $key . ".dat";
 
//判断头像是否存在
if (!is_file($gravatar_cache)) {
	$gravatar = 'http://www.gravatar.com/avatar/'.$key.'?s='.$s.'&d='.$d.'&r='.$r;
	copy($gravatar, $gravatar_cache);
	if (filesize($gravatar_cache) == 0) {
		copy($d, $gravatar_cache);
	}
}
 
$gravatar_cache_value = file_get_contents($gravatar_cache); //FALSE if 404
header('Content-type: image/jpeg');
echo $gravatar_cache_value;
unset ($gravatar_cache_value);
exit;

	if ( is_ssl() ) {
		$host = 'https://secure.gravatar.com';
	} else {
		if ( !empty($email) )
			$host = sprintf( "http://%d.gravatar.com", ( hexdec( $email_hash[0] ) % 2 ) );
		else
			$host = 'http://0.gravatar.com';
	}

/*
	if ( is_ssl() ) {
		$host = 'https://secure.gravatar.com';
	} else {
		if ( !empty($email) )
			$host = sprintf( "http://%d.gravatar.com", ( hexdec( $email_hash[0] ) % 2 ) );
		else
			$host = 'http://0.gravatar.com';
	}
*/
	if ( is_ssl() ) {
		$host = 'https://secure.gravatar.com';
	} else {
		$host = 'http://www.gravatar.com';
	}