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[stable9] Fix DAV stat cache to properly cache 404 #26792

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Merged
PVince81 merged 1 commit into from
Jan 10, 2017
Merged

[stable9] Fix DAV stat cache to properly cache 404 #26792

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96 changes: 47 additions & 49 deletions lib/private/files/storage/dav.php
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Original file line number Diff line number Diff line change
Expand Up @@ -47,7 +47,6 @@
use OCP\Files\StorageNotAvailableException;
use OCP\Util;
use Sabre\DAV\Client;
use Sabre\DAV\Exception\NotFound;
use Sabre\DAV\Xml\Property\ResourceType;
use Sabre\HTTP\ClientException;
use Sabre\HTTP\ClientHttpException;
Expand Down Expand Up @@ -203,8 +202,10 @@ public function opendir($path) {
array(),
1
);
$id = md5('webdav' . $this->root . $path);
$content = array();
if ($response === false) {
return false;
}
$content = [];
$files = array_keys($response);
array_shift($files); //the first entry is the current directory

Expand All @@ -221,13 +222,6 @@ public function opendir($path) {
$content[] = $file;
}
return IteratorDirectory::wrap($content);
} catch (ClientHttpException $e) {
if ($e->getHttpStatus() === 404) {
$this->statCache->clear($path . '/');
$this->statCache->set($path, false);
return false;
}
$this->convertException($e, $path);
} catch (\Exception $e) {
$this->convertException($e, $path);
}
Expand All @@ -242,17 +236,13 @@ public function opendir($path) {
*
* @param string $path path to propfind
*
* @return array propfind response
* @return array|boolean propfind response or false if the entry was not found
*
* @throws NotFound
* @throws ClientHttpException
*/
private function propfind($path) {
$path = $this->cleanPath($path);
$cachedResponse = $this->statCache->get($path);
if ($cachedResponse === false) {
// we know it didn't exist
throw new NotFound();
}
// we either don't know it, or we know it exists but need more details
if (is_null($cachedResponse) || $cachedResponse === true) {
$this->init();
Expand All @@ -269,11 +259,15 @@ private function propfind($path) {
)
);
$this->statCache->set($path, $response);
} catch (NotFound $e) {
// remember that this path did not exist
$this->statCache->clear($path . '/');
$this->statCache->set($path, false);
throw $e;
} catch (ClientHttpException $e) {
if ($e->getHttpStatus() === 404) {
$this->statCache->clear($path . '/');
$this->statCache->set($path, false);
return false;
}
$this->convertException($e, $path);
} catch (\Exception $e) {
$this->convertException($e, $path);
}
} else {
$response = $cachedResponse;
Expand All @@ -285,17 +279,15 @@ private function propfind($path) {
public function filetype($path) {
try {
$response = $this->propfind($path);
$responseType = array();
if ($response === false) {
return false;
}
$responseType = [];
if (isset($response["{DAV:}resourcetype"])) {
/** @var ResourceType[] $response */
$responseType = $response["{DAV:}resourcetype"]->getValue();
}
return (count($responseType) > 0 and $responseType[0] == "{DAV:}collection") ? 'dir' : 'file';
} catch (ClientHttpException $e) {
if ($e->getHttpStatus() === 404) {
return false;
}
$this->convertException($e, $path);
} catch (\Exception $e) {
$this->convertException($e, $path);
}
Expand All @@ -314,13 +306,7 @@ public function file_exists($path) {
return true;
}
// need to get from server
$this->propfind($path);
return true; //no 404 exception
} catch (ClientHttpException $e) {
if ($e->getHttpStatus() === 404) {
return false;
}
$this->convertException($e, $path);
return ($this->propfind($path) !== false);
} catch (\Exception $e) {
$this->convertException($e, $path);
}
Expand Down Expand Up @@ -425,7 +411,10 @@ public function free_space($path) {
$path = $this->cleanPath($path);
try {
// TODO: cacheable ?
$response = $this->client->propfind($this->encodePath($path), array('{DAV:}quota-available-bytes'));
$response = $this->client->propfind($this->encodePath($path), ['{DAV:}quota-available-bytes']);
if ($response === false) {
return FileInfo::SPACE_UNKNOWN;
}
if (isset($response['{DAV:}quota-available-bytes'])) {
return (int)$response['{DAV:}quota-available-bytes'];
} else {
Expand Down Expand Up @@ -547,15 +536,13 @@ public function copy($path1, $path2) {
public function stat($path) {
try {
$response = $this->propfind($path);
return array(
if ($response === false) {
return [];
}
return [
'mtime' => strtotime($response['{DAV:}getlastmodified']),
'size' => (int)isset($response['{DAV:}getcontentlength']) ? $response['{DAV:}getcontentlength'] : 0,
);
} catch (ClientHttpException $e) {
if ($e->getHttpStatus() === 404) {
return array();
}
$this->convertException($e, $path);
];
} catch (\Exception $e) {
$this->convertException($e, $path);
}
Expand All @@ -566,7 +553,10 @@ public function stat($path) {
public function getMimeType($path) {
try {
$response = $this->propfind($path);
$responseType = array();
if ($response === false) {
return false;
}
$responseType = [];
if (isset($response["{DAV:}resourcetype"])) {
/** @var ResourceType[] $response */
$responseType = $response["{DAV:}resourcetype"]->getValue();
Expand All @@ -579,11 +569,6 @@ public function getMimeType($path) {
} else {
return false;
}
} catch (ClientHttpException $e) {
if ($e->getHttpStatus() === 404) {
return false;
}
$this->convertException($e, $path);
} catch (\Exception $e) {
$this->convertException($e, $path);
}
Expand Down Expand Up @@ -674,6 +659,9 @@ public function getPermissions($path) {
$this->init();
$path = $this->cleanPath($path);
$response = $this->propfind($path);
if ($response === false) {
return 0;
}
if (isset($response['{http://owncloud.org/ns}permissions'])) {
return $this->parsePermissions($response['{http://owncloud.org/ns}permissions']);
} else if ($this->is_dir($path)) {
Expand All @@ -690,6 +678,9 @@ public function getETag($path) {
$this->init();
$path = $this->cleanPath($path);
$response = $this->propfind($path);
if ($response === false) {
return null;
}
if (isset($response['{DAV:}getetag'])) {
return trim($response['{DAV:}getetag'], '"');
}
Expand Down Expand Up @@ -733,6 +724,13 @@ public function hasUpdated($path, $time) {
// force refresh for $path
$this->statCache->remove($path);
$response = $this->propfind($path);
if ($response === false) {
if ($path === '') {
// if root is gone it means the storage is not available
throw new StorageNotAvailableException(get_class($e) . ': ' . $e->getMessage());
}
return false;
}
if (isset($response['{DAV:}getetag'])) {
$cachedData = $this->getCache()->get($path);
$etag = null;
Expand All @@ -752,7 +750,7 @@ public function hasUpdated($path, $time) {
return $remoteMtime > $time;
}
} catch (ClientHttpException $e) {
if ($e->getHttpStatus() === 404 || $e->getHttpStatus() === 405) {
if ($e->getHttpStatus() === 405) {
if ($path === '') {
// if root is gone it means the storage is not available
throw new StorageNotAvailableException(get_class($e) . ': ' . $e->getMessage());
Expand Down