<?php /** * GET an HTTP URL to retrieve its content * * @param string $url URL to get (http://...) * @param int $timeout network timeout (in seconds) * @param int $maxBytes maximum downloaded bytes (default: 4 MiB) * * @return array HTTP response headers, downloaded content * * Output format: * [0] = associative array containing HTTP response headers * [1] = URL content (downloaded data) * * Example: * list($headers, $data) = get_http_url('http://sebauvage.net/'); * if (strpos($headers[0], '200 OK') !== false) { * echo 'Data type: '.htmlspecialchars($headers['Content-Type']); * } else { * echo 'There was an error: '.htmlspecialchars($headers[0]); * } * * @see http://php.net/manual/en/function.file-get-contents.php * @see http://php.net/manual/en/function.stream-context-create.php * @see http://php.net/manual/en/function.get-headers.php */ function get_http_url($url, $timeout = 30, $maxBytes = 4194304) { $options = array( 'http' => array( 'method' => 'GET', 'timeout' => $timeout, 'user_agent' => 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:23.0)' .' Gecko/20100101 Firefox/23.0' ) ); $context = stream_context_create($options); try { // TODO: catch Exception in calling code (thumbnailer) $content = file_get_contents($url, false, $context, -1, $maxBytes); } catch (Exception $exc) { return array(array(0 => 'HTTP Error'), $exc->getMessage()); } if (!$content) { return array(array(0 => 'HTTP Error'), ''); } return array(get_headers($url, 1), $content); } /** * Returns the server's base URL: scheme://domain.tld[:port] * * @param array $server the $_SERVER array * * @return string the server's base URL * * @see http://www.ietf.org/rfc/rfc7239.txt * @see http://www.ietf.org/rfc/rfc6648.txt * @see http://stackoverflow.com/a/3561399 * @see http://stackoverflow.com/q/452375 */ function server_url($server) { $scheme = 'http'; $port = ''; // Shaarli is served behind a proxy if (isset($server['HTTP_X_FORWARDED_PROTO'])) { // Keep forwarded scheme $scheme = $server['HTTP_X_FORWARDED_PROTO']; if (isset($server['HTTP_X_FORWARDED_PORT'])) { // Keep forwarded port $port = ':'.$server['HTTP_X_FORWARDED_PORT']; } return $scheme.'://'.$server['SERVER_NAME'].$port; } // SSL detection if ((! empty($server['HTTPS']) && strtolower($server['HTTPS']) == 'on') || (isset($server['SERVER_PORT']) && $server['SERVER_PORT'] == '443')) { $scheme = 'https'; } // Do not append standard port values if (($scheme == 'http' && $server['SERVER_PORT'] != '80') || ($scheme == 'https' && $server['SERVER_PORT'] != '443')) { $port = ':'.$server['SERVER_PORT']; } return $scheme.'://'.$server['SERVER_NAME'].$port; } /** * Returns the absolute URL of the current script, without the query * * If the resource is "index.php", then it is removed (for better-looking URLs) * * @param array $server the $_SERVER array * * @return string the absolute URL of the current script, without the query */ function index_url($server) { $scriptname = $server['SCRIPT_NAME']; if (endswith($scriptname, 'index.php')) { $scriptname = substr($scriptname, 0, -9); } return server_url($server) . $scriptname; } /** * Returns the absolute URL of the current script, with the query * * If the resource is "index.php", then it is removed (for better-looking URLs) * * @param array $server the $_SERVER array * * @return string the absolute URL of the current script, with the query */ function page_url($server) { if (! empty($server['QUERY_STRING'])) { return index_url($server).'?'.$server['QUERY_STRING']; } return index_url($server); }