/**
* Returns response from DAS server or registry, or exception if error.
*/
function getResponse($url, $timeout)
{
$proxy = DasProxy::getProxyServer();
$ctx = null;
if (strlen($proxy) > 0) {
$aContext = array('http' => array('proxy' => $proxy, 'request_fulluri' => True));
$ctx = stream_context_create($aContext);
}
$url = str_replace(" ", "%20", $url);
if ($_REQUEST['m'] == 'pdb' && file_exists(DasProxy::CACHE_PATH . $_REQUEST['q'])) {
$_SESSION['pdb'] = DasProxy::CACHE_PATH . $_REQUEST['q'];
return "<response>ok</response>";
} else {
if ($_REQUEST['m'] == 'ontology' && file_exists(DasProxy::CACHE_PATH . $_REQUEST['q'])) {
$_SESSION['onto'] = DasProxy::CACHE_PATH . $_REQUEST['q'];
return file_get_contents(DasProxy::CACHE_PATH . $_REQUEST['q']);
} else {
if (strlen($proxy) > 0) {
$handle = fopen($url, "rb", false, $ctx);
} else {
$handle = fopen($url, "rb");
}
if ($handle === false) {
error_log("error reading from " . $url);
DasProxy::throwException("error reading from " . $url);
return;
}
stream_set_timeout($handle, $timeout);
stream_set_blocking($handle, 0);
$content = DasProxy::readUrlContent($handle);
if (isset($content) && strlen($content) > 0) {
if ($_REQUEST['m'] == 'pdb') {
fclose($handle);
file_put_contents(DasProxy::CACHE_PATH . $_REQUEST['q'], $content);
$_SESSION['pdb'] = DasProxy::CACHE_PATH . $_REQUEST['q'];
return "<response>ok</response>";
}
$dasStatus = DasProxy::getHeader($handle, "x-das-status");
fclose($handle);
if (isset($dasStatus) && ($stval = intval($dasStatus)) !== 200) {
DasProxy::throwException($dasStatus . " " . $dasErrorCodes[$stval]);
} else {
return $content;
}
} else {
// HTTP error
fclose($handle);
error_log("Failed to retrieve " . $url);
DasProxy::throwException("Failed to retrieve " . $url);
}
}
}
}
