protected function getFilesFromUrl()
{
$url = $this->request->getParam('URL');
$this->log->debug("Downloading file: %s", $url);
if (!self::$lastModified) {
self::$lastModified = new binarypool_lastmodified();
}
$lastmodified = self::$lastModified->lastModified($this->bucket, $url);
if (binarypool_config::getCacheRevalidate($this->bucket) === 0) {
$lastmodified['time'] = 0;
}
$tmpfile = tempnam(sys_get_temp_dir(), 'binary');
if ($tmpfile == '' || $tmpfile === FALSE) {
throw new binarypool_exception(104, 500, "Could not create temporary file");
}
array_push($this->tmpfiles, $tmpfile);
$result = array('code' => 0, 'headers' => array(), 'body' => '');
$retries = 3;
if ($lastmodified['revalidate']) {
$httpc = new binarypool_httpclient();
while ($retries) {
try {
$result = $httpc->download($url, $tmpfile, $lastmodified['time']);
if ($result['code'] < 500) {
break;
}
} catch (binarypool_httpclient_exception $e) {
// ignore - dropped connections etc. - retry
$this->log->debug("Failed download attempt from %s: %s", $url, $e);
}
sleep(1);
$retries--;
}
} else {
$result['code'] = 304;
}
if (304 == $result['code']) {
$this->log->debug("File %s has not been modified", $url);
return array();
}
if ($result['code'] != 200 || !filesize($tmpfile)) {
binarypool_views::flagBadUrl($this->bucket, $url);
throw new binarypool_exception(121, 400, "File could not be fetched from URL: " . $url);
}
$url_parsed = parse_url($url);
$filename = basename($url_parsed['path']);
# Restrict filenames TO ALPHANUMS and reduce sequences of '.' to avoid
# traversal issues, unicode issues, command injection etc.
$filename = preg_replace(array('#\\.{2,}#', '#[^a-zA-Z0-9\\.]+#'), array('.', '_'), $filename);
return array('_' => array('file' => $tmpfile, 'filename' => $filename));
}
/**
* Tests the flagBadUrl creates a symlink pointing to /dev/null
*/
function testFlagBadUrl()
{
$url = 'http://staticlocal.ch/images/bad.gif';
$urlhash = '55c79a345dd0ec066c1f6089c89e94478eaa2437';
$symlink = sprintf("%sdownloaded/55/55c79a345dd0ec066c1f6089c89e94478eaa2437", self::$BUCKET);
binarypool_views::flagBadUrl('test', $url);
$this->assertEqual(readlink($symlink), '/dev/null', 'Symlink does not point to /dev/null');
}
