function spawn_transcoder($source, $config_file = 'default', $timeout = 20)
{
// Because we employ "AllowEncodedSlashes NoDecode", the local file must only have slashes encoded in the filename
$source_escaped = str_replace("/", "%2f", $source);
// In the substitution, we must ensure that the hls_segment_filename value is percent-escaped as it represents a sprintf string
$source_escaped_pct_escaped = str_replace("%", "%%", $source_escaped);
$exec_subst = array('[SOURCE]' => $source, '[SOURCE-ESCAPED]' => $source_escaped, '[SOURCE-ESCAPED-PCT-ESCAPED]' => $source_escaped_pct_escaped, '[BASEURL]' => baseurl() . '/data/');
if (!($exec = @file_get_contents($config_file, FILE_USE_INCLUDE_PATH))) {
if (!($exec = file_get_contents($config_file . '.conf', FILE_USE_INCLUDE_PATH))) {
header(HTTP_CUSTOM_HEADER_RESPONDING_TO . urlencode($config_file));
http_response_code(400);
return FALSE;
}
}
$exec = trim(preg_replace('/\\s+/', ' ', $exec));
// the exec command should not have newlines in it
$exec = str_replace(array_keys($exec_subst), array_values($exec_subst), $exec);
// to allow token substitution
$process = new MyBackgroundProcess($exec);
$process->run();
// first check to see if we have obvious error coming back from the job spawn
null;
// if not, wait for the creation of the playlist file
$filename = dirname($_SERVER["SCRIPT_FILENAME"]) . "/data/{$source_escaped}.m3u8";
// sleep in EXEC_TIMEOUT_POLL_MS millisecond increments as we wait for exec to start output...
for ($waits = $timeout * 1000000; $waits > 0 && !file_exists($filename); $waits = $waits - EXEC_TIMEOUT_POLL_MS) {
usleep(EXEC_TIMEOUT_POLL_MS);
}
if (file_exists($filename)) {
passthru_m3u8($filename, $filename);
return $process;
} else {
$process->stop();
header(HTTP_CUSTOM_HEADER_RESPONDING_TO . urlencode($exec));
http_response_code(408);
return FALSE;
}
}
case 'print':
// reveal all jobs
$format = isset($_REQUEST['format']) && !empty($_REQUEST['format']) ? $_REQUEST['format'] : DEFAULT_PRINT_FORMAT;
$j->print_r_jobs($format);
break;
case 'ping':
// touch the job associated with the passed source
// the following seems to work with the mod_action handler for existing m3u8 files. If the .htaccess file is rearchitected, this will need servicing too.
$source_file = basename($_SERVER['REQUEST_URI']);
// scrape all up to the final .m3u8, and ditch any parameters appended to the spec
// WAS: $source_url = preg_replace('/(.*).m3u8(\?.*)$/i', '\1', urldecode($source_file));
$source_url = preg_replace('/(.*)(.m3u8.*)$/i', '\\1', urldecode($source_file));
if ($job = $j->job_of_source($source_url)) {
$j->ping_job($job);
}
passthru_m3u8($_SERVER['PATH_TRANSLATED'], $source_file);
break;
case 'spawn':
// spawn and register an encoder since caller asked for an m3u8 file that does not yet exist
$source = $_REQUEST['source'];
$conf = DEFAULT_CONFIG_DIR . (isset($_REQUEST['conf']) && !empty($_REQUEST['conf']) ? $_REQUEST['conf'] : DEFAULT_CONFIG_FILE);
//echo "source=" . $source . " and conf=" . $conf . "\n"; die(0);
if (!(count($j->get_jobs()) <= $config['max_jobs'])) {
http_response_code(408);
} elseif ($process = spawn_transcoder($source, $conf, $config['spawn_transcoder_timeout'])) {
$j->register_this_job($process, $source, $conf);
}
break;
default:
break;
}
