setFallbackAutoloader(true); try { $context = new Libsyn_Context(); $trafficker = Libsyn_Service_Trafficker::getInstance(); $url = $trafficker->trafficRequest($_SERVER['REQUEST_URI']); $url = rewriteDevelopmentUrl($url); issueRedirect($url, $trafficker->showData, $trafficker->fileData); } catch (Exception $e) { if ($e->getCode() != 404 && $e->getCode() != 403) { Libsyn_Log::fatal($e); } if (!$trafficker->isDebug()) { issueError($_SERVER['REQUEST_URI'], $e->getCode(), $e->getMessage()); } } /** * Issues a redirect to the provided URL. * Will take into account Facebook user agent. * @param string $url Destination URL */ function issueRedirect($url, $show, $media) { global $context; if (!empty($url)) { $fileName = basename(parse_url($url, PHP_URL_PATH)); $mimeType = Libsyn_Utilities::getMimeType($fileName); // Facebook doesn't handle redirects so well and it uses the Content-Type // header to determine whether or not it's going to try to embed // a link using one of it's players. We want to make sure that Facebook // does embed our audio specifically. Since facebook's URL scraper // sends a 206 request and isn't even concerned with checking the content // we'll not send them any - instead 200 the response and exit out, but // first send the proper mime type for Facebook player goodness. if (isset($_SERVER['HTTP_USER_AGENT']) && stripos($_SERVER['HTTP_USER_AGENT'], 'facebook') !== false) { header("HTTP/1.0 200 OK"); $trafficUrl = 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']; $assetUrl = 'http://' . $context->getHostname('assets') . ( (!empty($media['image_content_id'])) ? '/content/' . $media['image_content_id'] : '/show/' . $show['show_id'] ); print << EOHTML; } else { header("Location: {$url}"); } } } function issueError($url, $code, $message) { switch ($code) { case 404: $code = "404 Not Found"; break; case 403: $code = "403 Forbidden"; break; default: $code = "500 Internal Server Error"; break; } header("HTTP/1.0 $code"); $error_number = $code; $error_message_1 = "";//$msg1; $error_message_2 = "";//$msg2; include_once("error.php"); exit(); } /** * Verifies that the file exists (iff this is a dev deployment type) * and, on failure, rewrites to production */ function rewriteDevelopmentUrl($url) { global $context; if ($context->isProduction()) { return $url; } // If not running in deployment or // the URL returns a HTTP code of 2??, // do not modifiy if (checkUrl($url)) { return $url; } else { $url = str_replace("/t/", "/p/", $url); } return $url; } function checkUrl($url) { $ch = curl_init($url); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1); curl_setopt($ch, CURLOPT_NOBODY, 1); curl_setopt($ch, CURLOPT_CONNECTTIMEOUT_MS, 750); curl_setopt($ch, CURLOPT_TIMEOUT_MS, 750); $response = curl_exec($ch); $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE); curl_close($ch); return $httpCode >= 200 && $httpCode < 300; }