get($metadataKey);
return $metadataValue;
}
/**
* Requests a key from the Metadata server using cURL.
*
* @param $metadataKey the key for the metadata server
*/
function request_metadata_using_curl($metadataKey)
{
$url = 'http://metadata/computeMetadata/v1/' . $metadataKey;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Metadata-Flavor: Google'));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
return curl_exec($ch);
}
# [END gae_metadata]
function print_metadata_paths($root = '')
{
$keys = request_metadata_using_google_cloud($root);
$html = '';
foreach (explode("\n", trim($keys)) as $key) {
$path = $root . $key;
$html .= '- ';
if (substr($key, -1) == '/') {
$html .= sprintf('%s
', $key);
$html .= print_metadata_paths($path);
} else {
$html .= sprintf('%s', urlencode($path), $key);
}
$html .= ' ';
}
return $html . '
';
}
if (!GCECredentials::onGce()) {
exit('The metadata server can only be reached when running on App Engine.');
}
?>
Call the Metadata server
Metadata for
- the metadata value requested contains sensitive information and so will not be displayed here
- With Google Cloud:
- With cURL:
All metadata keys: