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DiffusionGitLFSAuthenticateWorkflow.php
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Sat, Dec 28, 23:12

DiffusionGitLFSAuthenticateWorkflow.php
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<?php
final class DiffusionGitLFSAuthenticateWorkflow
extends DiffusionGitSSHWorkflow {
protected function didConstruct() {
$this->setName('git-lfs-authenticate');
$this->setArguments(
array(
array(
'name' => 'argv',
'wildcard' => true,
),
));
}
protected function identifyRepository() {
return $this->loadRepositoryWithPath($this->getLFSPathArgument());
}
private function getLFSPathArgument() {
return $this->getLFSArgument(0);
}
private function getLFSOperationArgument() {
return $this->getLFSArgument(1);
}
private function getLFSArgument($position) {
$args = $this->getArgs();
$argv = $args->getArg('argv');
if (!isset($argv[$position])) {
throw new Exception(
pht(
'Expected `git-lfs-authenticate <path> <operation>`, but received '.
'too few arguments.'));
}
return $argv[$position];
}
protected function executeRepositoryOperations() {
$operation = $this->getLFSOperationArgument();
// NOTE: We aren't checking write access here, even for "upload". The
// HTTP endpoint should be able to do that for us.
switch ($operation) {
case 'upload':
case 'download':
break;
default:
throw new Exception(
pht(
'Git LFS operation "%s" is not supported by this server.',
$operation));
}
$repository = $this->getRepository();
if (!$repository->isGit()) {
throw new Exception(
pht(
'Repository "%s" is not a Git repository. Git LFS is only '.
'supported for Git repositories.',
$repository->getDisplayName()));
}
if (!$repository->canUseGitLFS()) {
throw new Exception(
pht('Git LFS is not enabled for this repository.'));
}
// NOTE: This is usually the same as the default URI (which does not
// need to be specified in the response), but the protocol or domain may
// differ in some situations.
$lfs_uri = $repository->getGitLFSURI('info/lfs');
// Generate a temporary token to allow the user to acces LFS over HTTP.
// This works even if normal HTTP repository operations are not available
// on this host, and does not require the user to have a VCS password.
$user = $this->getUser();
$headers = array();
$lfs_user = DiffusionGitLFSTemporaryTokenType::HTTP_USERNAME;
$lfs_pass = Filesystem::readRandomCharacters(32);
$lfs_hash = PhabricatorHash::digest($lfs_pass);
$ttl = PhabricatorTime::getNow() + phutil_units('1 day in seconds');
$token = id(new PhabricatorAuthTemporaryToken())
->setTokenResource($repository->getPHID())
->setTokenType(DiffusionGitLFSTemporaryTokenType::TOKENTYPE)
->setTokenCode($lfs_hash)
->setUserPHID($user->getPHID())
->setTemporaryTokenProperty('lfs.operation', $operation)
->setTokenExpires($ttl)
->save();
$authorization_header = base64_encode($lfs_user.':'.$lfs_pass);
$headers['Authorization'] = 'Basic '.$authorization_header;
$result = array(
'header' => $headers,
'href' => $lfs_uri,
);
$result = phutil_json_encode($result);
$this->writeIO($result);
$this->waitForGitClient();
return 0;
}
}

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