private function handleRequest($offset, $time)
{
Log::SetPrefix(sprintf("Thumbnail(%d): ", getmypid()));
$hash = $this->getHash();
if (isset($_SERVER['HTTP_IF_NONE_MATCH']) && $_SERVER['HTTP_IF_NONE_MATCH'] == $hash) {
header(getenv("SERVER_PROTOCOL") . " 304 Not Modified");
header("Content-Length: 0");
exit;
}
$cachedir = CACHE_DIR;
umask(077);
if (!is_dir($cachedir)) {
Log::Info("Creating cache directory %s", $cachedir);
@mkdir($cachedir);
}
$file = $cachedir . '/' . $this->getHash() . '-' . $offset;
if (is_file($file)) {
$lm = filemtime($file);
header("Content-Type: image/jpeg");
header("Etag: \"" . $this->getHash() . "-" . $offset . "\"");
header("Last-Modified: " . gmdate('D, d M Y H:i:s T', $lm));
header("Expires: " . gmdate('D, d M Y H:i:s T', $lm + 86400));
if (array_key_exists('HTTP_IF_MODIFIED_SINCE', $_SERVER) && $_SERVER['HTTP_IF_MODIFIED_SINCE']) {
header(getenv("SERVER_PROTOCOL") . " 304 Not Modified");
header("Content-Length: 0");
Log::Debug("request already satisfied by HTTP_IF_MODIFIED_SINCE header, file=%s", $file);
exit;
}
echo file_get_contents($file);
exit;
}
$outdir = $cachedir . '/' . getmypid();
if (!is_dir($outdir)) {
Log::Debug("Creating work directory %s", $outdir);
mkdir($outdir, 0700);
}
$tempfile = new TempFile(".ts");
$infile = new File($this->stream, false);
$infile->seek($offset);
$data = $infile->read(1024 * 1024);
$infile->close();
$tempfile->write($data);
$cmd = sprintf("%s -nolirc -really-quiet -zoom -quiet -xy %d -vo jpeg:outdir=%s:maxfiles=2 -ao null %s -frames 2 &> /dev/null", MPLAYER, $this->width(), $outdir, escapeshellarg($tempfile->Filename()));
$ts = microtime(true);
Log::Debug("command=%s", $cmd);
exec($cmd);
$elapsed = microtime(true) - $ts;
Log::Debug("command executed, duration=%.6f sec", $elapsed);
$tempfile = $this->chooseBestImage($outdir);
Log::Debug("using image %s", $tempfile);
if (!is_file($tempfile)) {
Log::Error("command failed, command was %s", $cmd);
header("HTTP/1.0 404 not found");
exit;
}
$im = @imagecreatefromjpeg($tempfile);
$timestring = sprintf("%02d:%02d:%02d", floor($time / 3600), floor($time % 3600 / 60), $time % 60);
$this->writeTextAligned($im, self::ALIGN_LEFT, self::ALIGN_TOP, $timestring);
ob_start();
imagejpeg($im, '', 60);
$data = ob_get_contents();
ob_end_clean();
$this->cleanDirectory($outdir);
if ($data != '') {
Log::Debug("finished generation, Size=%d", strlen($data));
header("Content-Type: image/jpeg");
file_put_contents($file, $data);
$lm = filemtime($file);
header("Last-Modified: " . gmdate('D, d M Y H:i:s T', $lm));
header("Etag: \"" . $this->getHash() . "-" . $offset . "\"");
header("Expires: " . gmdate('D, d M Y H:i:s T', $lm + 86400));
} else {
Log::Error("oops, data is empty, should not happen");
}
print $data;
exit;
}
