Warning: chmod(): Operation not permitted in /var/www/hopeinstoughton_www/wp-content/plugins/simple-universal-google-analytics/main.php on line 8
[0] in function chmod in /var/www/hopeinstoughton_www/wp-content/plugins/simple-universal-google-analytics/main.php on line 8
[1] in function include_once in /var/www/hopeinstoughton_www/wp-settings.php on line 560
[2] in function require_once in /var/www/hopeinstoughton_www/wp-config.php on line 85
[3] in function require_once in /var/www/hopeinstoughton_www/wp-load.php on line 50
[4] in function require_once in /var/www/hopeinstoughton_www/wp-blog-header.php on line 13
[5] in function require in /var/www/hopeinstoughton_www/index.php on line 17

<?php

    require_once __DIR__ . '/class.media-source.php';
    require_once __DIR__ . '/RangeHeader.php';
//    require_once __DIR__ . '/class.captions.php';
    require_once __DIR__ . '/vtt_class.php';

    $payload = empty($_GET['auth']) ? '' : $_GET['auth'];
    $filename = empty($_GET['file']) ? '' : $_GET['file'];
    $query = $_SERVER['REQUEST_URI'];
    if (($p = strpos($query, '?')) !== FALSE) {
        $query = substr($query, $p + 1);
        parse_str($query, $res);
    } else {
        $res = [];
    }
    
    $source = new MediaSource;

    $param = $source->decodeAuth($payload);
    if (!$param->valid) {
        header('Content-type: text/plain');
        die("Invalid Link");
    }
    if ($param->expired) {
        header('Content-type: text/plain');
        die("Expired Link");
    }
	if ($param->ext == 'htm') $param->ext = 'html';
    $sourcefile = dirname(__DIR__) . '/' . substr($param->id, 0, 1) . '/' . $param->id . '.' . $param->ext;
    if (!file_exists($sourcefile)) {
        header('Content-type: text/plain');
        die("File not Found");
    }

    while (ob_get_level()) 
        ob_end_clean();

    if ($_SERVER['REQUEST_METHOD'] === 'OPTIONS') {
        header('Access-Control-Allow-Origin: *');
        header('Access-Control-Allow-Methods: POST, GET, DELETE, PUT, PATCH, OPTIONS');
        header('Access-Control-Allow-Headers: token, Content-Type');
        header('Access-Control-Max-Age: 86400');
        header('Content-Length: 0');
        header('Content-Type: text/plain');
        die();
    }
    header('Access-Control-Allow-Origin: *');

    switch($param->ext) {
        case 'vtt':
            $mimetype = 'text/vtt';
            break;
            
        case 'mp3':
            $mimetype = 'audio/mp3';
            break;

        case 'mp4':
            $mimetype = 'video/mp4';
            break;
        
        case 'xml':
            $mimetype = 'application/xml';
            break;

        case 'jpg':
            $mimetype = 'video/jpeg';
            break;
        case 'png':
            $mimetype = 'video/png';
            break;

        case 'html':
            $mimetype = 'text/html';
            break;
			
		case 'zip':
			header('Content-type: text/plain');
			list($entry, $name) = explode('/', $filename . '//');
			_downloadZipItem($sourcefile, $entry, $name);
			exit;
		default:
			$mimetype = 'text/plain';
			break;
    }

    $short = empty($res['short']) ? 0 : (int) $res['short'];
    if ($param->ext == 'vtt' && $short) {
		if ($short == 2) header('Content-type: text/plain');
        $content = _generateShortVTTfile($sourcefile, $short);
        echo $content;
        exit;
    }

    try {
        $text = get_request_header('Range');
        $rangeHeader = RangeHeader::createFromHeaderString($text);      // regexp has been changed in this function
        (new PartialFileServlet($rangeHeader))->sendFile($sourcefile, $mimetype, $filename);
    } catch (InvalidRangeHeaderException $e) {
        header("HTTP/1.1 400 Bad Request");
    } catch (UnsatisfiableRangeException $e) {
        header("HTTP/1.1 416 Range Not Satisfiable");
    } catch (NonExistentFileException $e) {
        header("HTTP/1.1 404 Not Found");
    } catch (UnreadableFileException $e) {
        header("HTTP/1.1 500 Internal Server Error");
    }

function _generateShortVTTfile($sourcefile, $short) {
		$vtt = new vtt_class;
		$vtt->Pauses(TRUE)
			->Filename($sourcefile);
		$vttdata = $vtt->getEntries();
		if (!count($vttdata)) return '';	       		// no transcript available

		$output = '';
		if ($short == 2) {
			return $vtt->AsText();
		}
		return $vtt->AsWebVtt();
}

// inline content disposition
function _downloadZipItem($sourcefile, $entry, $name) {
	$zip = new ZipArchive;
	$zip->Open($sourcefile);
	
	$content = $zip->getFromIndex($entry);
	$filename_temp = tempnam(sys_get_temp_dir(), 'itm');
	file_put_contents($filename_temp, $content);
	$zip->Close();
	
	$mime = mime_content_type($filename_temp);
	header("Content-Disposition: inline; filename=\"$name\"");
	header('Content-type: ' . $mime);
	readfile($filename_temp);
	
	unlink($filename_temp);
}