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Added stat cache for DAV storage 

The stat cache stored known states of files/folders to avoid requerying
the DAV server multiple times.
This commit is contained in:
Vincent Petry 2015-02-11 18:16:01 +01:00
parent e66dda83df
commit 670ca68453
1 changed files with 143 additions and 27 deletions
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170
lib/private/files/storage/dav.php
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@ -30,6 +30,11 @@ class DAV extends \OC\Files\Storage\Common {
*/
private $client;
/**
* @var \OC\MemCache\ArrayCache
*/
private $statCache;
/** @var array */
private static $tempFiles = [];
@ -38,6 +43,7 @@ class DAV extends \OC\Files\Storage\Common {
* @throws \Exception
*/
public function __construct($params) {
$this->statCache = new \OC\MemCache\ArrayCache();
if (isset($params['host']) && isset($params['user']) && isset($params['password'])) {
$host = $params['host'];
//remove leading http[s], will be generated in createBaseUri()
@ -93,6 +99,13 @@ class DAV extends \OC\Files\Storage\Common {
}
}
/**
* Clear the stat cache
*/
public function clearStatCache() {
$this->statCache->clear();
}
/** {@inheritdoc} */
public function getId() {
return 'webdav::' . $this->user . '@' . $this->host . '/' . $this->root;
@ -112,16 +125,23 @@ class DAV extends \OC\Files\Storage\Common {
public function mkdir($path) {
$this->init();
$path = $this->cleanPath($path);
return $this->simpleResponse('MKCOL', $path, null, 201);
$result = $this->simpleResponse('MKCOL', $path, null, 201);
if ($result) {
$this->statCache->set($path, true);
}
return $result;
}
/** {@inheritdoc} */
public function rmdir($path) {
$this->init();
$path = $this->cleanPath($path) . '/';
$path = $this->cleanPath($path);
// FIXME: some WebDAV impl return 403 when trying to DELETE
// a non-empty folder
return $this->simpleResponse('DELETE', $path, null, 204);
$result = $this->simpleResponse('DELETE', $path . '/', null, 204);
$this->statCache->clear($path . '/');
$this->statCache->remove($path);
return $result;
}
/** {@inheritdoc} */
@ -129,19 +149,34 @@ class DAV extends \OC\Files\Storage\Common {
$this->init();
$path = $this->cleanPath($path);
try {
$response = $this->client->propfind($this->encodePath($path), array(), 1);
$response = $this->client->propfind(
$this->encodePath($path),
array(),
1
);
$id = md5('webdav' . $this->root . $path);
$content = array();
$files = array_keys($response);
array_shift($files); //the first entry is the current directory
if (!$this->statCache->hasKey($path)) {
$this->statCache->set($path, true);
}
foreach ($files as $file) {
$file = urldecode(basename($file));
$file = urldecode($file);
// do not store the real entry, we might not have all properties
if (!$this->statCache->hasKey($path)) {
$this->statCache->set($file, true);
}
$file = basename($file);
$content[] = $file;
}
\OC\Files\Stream\Dir::register($id, $content);
return opendir('fakedir://' . $id);
} catch (ClientHttpException $e) {
if ($e->getHttpStatus() === 404) {
$this->statCache->clear($path . '/');
$this->statCache->set($path, false);
return false;
}
$this->convertSabreException($e);
@ -153,12 +188,57 @@ class DAV extends \OC\Files\Storage\Common {
}
}
/**
* Propfind call with cache handling.
*
* First checks if information is cached.
* If not, request it from the server then store to cache.
*
* @param string $path path to propfind
*
* @return array propfind response
*
* @throws Exception\NotFound
*/
private function propfind($path) {
$path = $this->cleanPath($path);
$cachedResponse = $this->statCache->get($path);
if ($cachedResponse === false) {
// we know it didn't exist
throw new Exception\NotFound();
}
// we either don't know it, or we know it exists but need more details
if (is_null($cachedResponse) || $cachedResponse === true) {
$this->init();
try {
$response = $this->client->propfind(
$this->encodePath($path),
array(
'{DAV:}getlastmodified',
'{DAV:}getcontentlength',
'{DAV:}getcontenttype',
'{http://owncloud.org/ns}permissions',
'{DAV:}resourcetype',
'{DAV:}getetag',
)
);
$this->statCache->set($path, $response);
} catch (Exception\NotFound $e) {
// remember that this path did not exist
$this->statCache->clear($path . '/');
$this->statCache->set($path, false);
throw $e;
}
} else {
$response = $cachedResponse;
}
return $response;
}
/** {@inheritdoc} */
public function filetype($path) {
$this->init();
$path = $this->cleanPath($path);
try {
$response = $this->client->propfind($this->encodePath($path), array('{DAV:}resourcetype'));
$response = $this->propfind($path);
$responseType = array();
if (isset($response["{DAV:}resourcetype"])) {
$responseType = $response["{DAV:}resourcetype"]->resourceType;
@ -179,10 +259,17 @@ class DAV extends \OC\Files\Storage\Common {
/** {@inheritdoc} */
public function file_exists($path) {
$this->init();
$path = $this->cleanPath($path);
try {
$this->client->propfind($this->encodePath($path), array('{DAV:}resourcetype'));
$path = $this->cleanPath($path);
$cachedState = $this->statCache->get($path);
if ($cachedState === false) {
// we know the file doesn't exist
return false;
} else if (!is_null($cachedState)) {
return true;
}
// need to get from server
$this->propfind($path);
return true; //no 404 exception
} catch (ClientHttpException $e) {
if ($e->getHttpStatus() === 404) {
@ -200,7 +287,11 @@ class DAV extends \OC\Files\Storage\Common {
/** {@inheritdoc} */
public function unlink($path) {
$this->init();
return $this->simpleResponse('DELETE', $path, null, 204);
$path = $this->cleanPath($path);
$result = $this->simpleResponse('DELETE', $path, null, 204);
$this->statCache->clear($path . '/');
$this->statCache->remove($path);
return $result;
}
/** {@inheritdoc} */
@ -288,6 +379,7 @@ class DAV extends \OC\Files\Storage\Common {
$this->init();
$path = $this->cleanPath($path);
try {
// TODO: cacheable ?
$response = $this->client->propfind($this->encodePath($path), array('{DAV:}quota-available-bytes'));
if (isset($response['{DAV:}quota-available-bytes'])) {
return (int)$response['{DAV:}quota-available-bytes'];
@ -310,6 +402,7 @@ class DAV extends \OC\Files\Storage\Common {
// if file exists, update the mtime, else create a new empty file
if ($this->file_exists($path)) {
try {
$this->statCache->remove($path);
$this->client->proppatch($this->encodePath($path), array('{DAV:}lastmodified' => $mtime));
} catch (ClientHttpException $e) {
if ($e->getHttpStatus() === 501) {
@ -328,12 +421,26 @@ class DAV extends \OC\Files\Storage\Common {
return true;
}
/**
* @param string $path
* @param string $data
*/
public function file_put_contents($path, $data) {
$path = $this->cleanPath($path);
$result = parent::file_put_contents($path, $data);
$this->statCache->remove($path);
return $result;
}
/**
* @param string $path
* @param string $target
*/
protected function uploadFile($path, $target) {
$this->init();
// invalidate
$target = $this->cleanPath($target);
$this->statCache->remove($target);
$source = fopen($path, 'r');
$curl = curl_init();
@ -366,10 +473,21 @@ class DAV extends \OC\Files\Storage\Common {
/** {@inheritdoc} */
public function rename($path1, $path2) {
$this->init();
$path1 = $this->encodePath($this->cleanPath($path1));
$path2 = $this->createBaseUri() . $this->encodePath($this->cleanPath($path2));
$path1 = $this->cleanPath($path1);
$path2 = $this->cleanPath($path2);
try {
$this->client->request('MOVE', $path1, null, array('Destination' => $path2));
$this->client->request(
'MOVE',
$this->encodePath($path1),
null,
array(
'Destination' => $this->createBaseUri() . $this->encodePath($path2)
)
);
$this->statCache->clear($path1 . '/');
$this->statCache->clear($path2 . '/');
$this->statCache->set($path1, false);
$this->statCache->set($path2, true);
$this->removeCachedFile($path1);
$this->removeCachedFile($path2);
return true;
@ -390,6 +508,8 @@ class DAV extends \OC\Files\Storage\Common {
$path2 = $this->createBaseUri() . $this->encodePath($this->cleanPath($path2));
try {
$this->client->request('COPY', $path1, null, array('Destination' => $path2));
$this->statCache->clear($path2 . '/');
$this->statCache->set($path2, true);
$this->removeCachedFile($path2);
return true;
} catch (ClientHttpException $e) {
@ -404,10 +524,8 @@ class DAV extends \OC\Files\Storage\Common {
/** {@inheritdoc} */
public function stat($path) {
$this->init();
$path = $this->cleanPath($path);
try {
$response = $this->client->propfind($this->encodePath($path), array('{DAV:}getlastmodified', '{DAV:}getcontentlength'));
$response = $this->propfind($path);
return array(
'mtime' => strtotime($response['{DAV:}getlastmodified']),
'size' => (int)isset($response['{DAV:}getcontentlength']) ? $response['{DAV:}getcontentlength'] : 0,
@ -427,10 +545,8 @@ class DAV extends \OC\Files\Storage\Common {
/** {@inheritdoc} */
public function getMimeType($path) {
$this->init();
$path = $this->cleanPath($path);
try {
$response = $this->client->propfind($this->encodePath($path), array('{DAV:}getcontenttype', '{DAV:}resourcetype'));
$response = $this->propfind($path);
$responseType = array();
if (isset($response["{DAV:}resourcetype"])) {
$responseType = $response["{DAV:}resourcetype"]->resourceType;
@ -461,7 +577,7 @@ class DAV extends \OC\Files\Storage\Common {
* @return string
*/
public function cleanPath($path) {
if ($path === "") {
if ($path === '') {
return $path;
}
$path = \OC\Files\Filesystem::normalizePath($path);
@ -496,6 +612,8 @@ class DAV extends \OC\Files\Storage\Common {
return $response['statusCode'] == $expected;
} catch (ClientHttpException $e) {
if ($e->getHttpStatus() === 404 && $method === 'DELETE') {
$this->statCache->clear($path . '/');
$this->statCache->set($path, false);
return false;
}
@ -585,11 +703,9 @@ class DAV extends \OC\Files\Storage\Common {
$this->init();
$path = $this->cleanPath($path);
try {
$response = $this->client->propfind($this->encodePath($path), array(
'{DAV:}getlastmodified',
'{DAV:}getetag',
'{http://owncloud.org/ns}permissions'
));
// force refresh for $path
$this->statCache->remove($path);
$response = $this->propfind($path);
if (isset($response['{DAV:}getetag'])) {
$cachedData = $this->getCache()->get($path);
$etag = trim($response['{DAV:}getetag'], '"');