/**
* Build a new Conduit client in order to make a service call to this
* repository.
*
* If the repository is hosted locally, this method may return `null`. The
* caller should use `ConduitCall` or other local logic to complete the
* request.
*
* By default, we will return a @{class:ConduitClient} for any repository with
* a service, even if that service is on the current device.
*
* We do this because this configuration does not make very much sense in a
* production context, but is very common in a test/development context
* (where the developer's machine is both the web host and the repository
* service). By proxying in development, we get more consistent behavior
* between development and production, and don't have a major untested
* codepath.
*
* The `$never_proxy` parameter can be used to prevent this local proxying.
* If the flag is passed:
*
* - The method will return `null` (implying a local service call)
* if the repository service is hosted on the current device.
* - The method will throw if it would need to return a client.
*
* This is used to prevent loops in Conduit: the first request will proxy,
* even in development, but the second request will be identified as a
* cluster request and forced not to proxy.
*
* For lower-level service resolution, see @{method:getAlmanacServiceURI}.
*
* @param PhabricatorUser Viewing user.
* @param bool `true` to throw if a client would be returned.
* @return ConduitClient|null Client, or `null` for local repositories.
*/
public function newConduitClient(PhabricatorUser $viewer, $never_proxy = false)
{
$uri = $this->getAlmanacServiceURI($viewer, $never_proxy, array('http', 'https'));
if ($uri === null) {
return null;
}
$domain = id(new PhutilURI(PhabricatorEnv::getURI('/')))->getDomain();
$client = id(new ConduitClient($uri))->setHost($domain);
if ($viewer->isOmnipotent()) {
// If the caller is the omnipotent user (normally, a daemon), we will
// sign the request with this host's asymmetric keypair.
$public_path = AlmanacKeys::getKeyPath('device.pub');
try {
$public_key = Filesystem::readFile($public_path);
} catch (Exception $ex) {
throw new PhutilAggregateException(pht('Unable to read device public key while attempting to make ' . 'authenticated method call within the Phabricator cluster. ' . 'Use `%s` to register keys for this device. Exception: %s', 'bin/almanac register', $ex->getMessage()), array($ex));
}
$private_path = AlmanacKeys::getKeyPath('device.key');
try {
$private_key = Filesystem::readFile($private_path);
$private_key = new PhutilOpaqueEnvelope($private_key);
} catch (Exception $ex) {
throw new PhutilAggregateException(pht('Unable to read device private key while attempting to make ' . 'authenticated method call within the Phabricator cluster. ' . 'Use `%s` to register keys for this device. Exception: %s', 'bin/almanac register', $ex->getMessage()), array($ex));
}
$client->setSigningKeys($public_key, $private_key);
} else {
// If the caller is a normal user, we generate or retrieve a cluster
// API token.
$token = PhabricatorConduitToken::loadClusterTokenForUser($viewer);
if ($token) {
$client->setConduitToken($token->getToken());
}
}
return $client;
}
