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FileAllocateConduitAPIMethod.php
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Thu, Jan 9, 17:03

FileAllocateConduitAPIMethod.php
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<?php
final class FileAllocateConduitAPIMethod
extends FileConduitAPIMethod {
public function getAPIMethodName() {
return 'file.allocate';
}
public function getMethodDescription() {
return pht('Prepare to upload a file.');
}
protected function defineParamTypes() {
return array(
'name' => 'string',
'contentLength' => 'int',
'contentHash' => 'optional string',
'viewPolicy' => 'optional string',
'deleteAfterEpoch' => 'optional int',
);
}
protected function defineReturnType() {
return 'map<string, wild>';
}
protected function execute(ConduitAPIRequest $request) {
$viewer = $request->getUser();
$hash = $request->getValue('contentHash');
$name = $request->getValue('name');
$view_policy = $request->getValue('viewPolicy');
$length = $request->getValue('contentLength');
$properties = array(
'name' => $name,
'authorPHID' => $viewer->getPHID(),
'isExplicitUpload' => true,
);
if ($view_policy !== null) {
$properties['viewPolicy'] = $view_policy;
}
$ttl = $request->getValue('deleteAfterEpoch');
if ($ttl) {
$properties['ttl.absolute'] = $ttl;
}
$file = null;
if ($hash !== null) {
$file = PhabricatorFile::newFileFromContentHash(
$hash,
$properties);
}
if ($hash !== null && !$file) {
$chunked_hash = PhabricatorChunkedFileStorageEngine::getChunkedHash(
$viewer,
$hash);
$file = id(new PhabricatorFileQuery())
->setViewer($viewer)
->withContentHashes(array($chunked_hash))
->executeOne();
}
if (strlen($name) && !$hash && !$file) {
if ($length > PhabricatorFileStorageEngine::getChunkThreshold()) {
// If we don't have a hash, but this file is large enough to store in
// chunks and thus may be resumable, try to find a partially uploaded
// file by the same author with the same name and same length. This
// allows us to resume uploads in Javascript where we can't efficiently
// compute file hashes.
$file = id(new PhabricatorFileQuery())
->setViewer($viewer)
->withAuthorPHIDs(array($viewer->getPHID()))
->withNames(array($name))
->withLengthBetween($length, $length)
->withIsPartial(true)
->setLimit(1)
->executeOne();
}
}
if ($file) {
return array(
'upload' => (bool)$file->getIsPartial(),
'filePHID' => $file->getPHID(),
);
}
// If there are any non-chunk engines which this file can fit into,
// just tell the client to upload the file.
$engines = PhabricatorFileStorageEngine::loadStorageEngines($length);
if ($engines) {
return array(
'upload' => true,
'filePHID' => null,
);
}
// Otherwise, this is a large file and we want to perform a chunked
// upload if we have a chunk engine available.
$chunk_engines = PhabricatorFileStorageEngine::loadWritableChunkEngines();
if ($chunk_engines) {
$chunk_properties = $properties;
if ($hash !== null) {
$chunk_properties += array(
'chunkedHash' => $chunked_hash,
);
}
$chunk_engine = head($chunk_engines);
$file = $chunk_engine->allocateChunks($length, $chunk_properties);
return array(
'upload' => true,
'filePHID' => $file->getPHID(),
);
}
// None of the storage engines can accept this file.
if (PhabricatorFileStorageEngine::loadWritableEngines()) {
$error = pht(
'Unable to upload file: this file is too large for any '.
'configured storage engine.');
} else {
$error = pht(
'Unable to upload file: the server is not configured with any '.
'writable storage engines.');
}
return array(
'upload' => false,
'filePHID' => null,
'error' => $error,
);
}
}

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