diff options
Diffstat (limited to 'include/RedDAV/RedFile.php')
| -rw-r--r-- | include/RedDAV/RedFile.php | 279 |
1 files changed, 279 insertions, 0 deletions
diff --git a/include/RedDAV/RedFile.php b/include/RedDAV/RedFile.php new file mode 100644 index 000000000..3a5230dc1 --- /dev/null +++ b/include/RedDAV/RedFile.php @@ -0,0 +1,279 @@ +<?php + +namespace RedMatrix\RedDAV; + +use Sabre\DAV; + +/** + * @brief This class represents a file in DAV. + * + * It provides all functions to work with files in Red's cloud through DAV protocol. + * + * @extends \Sabre\DAV\Node + * @implements \Sabre\DAV\IFile + * + * @link http://github.com/friendica/red + * @license http://opensource.org/licenses/mit-license.php The MIT License (MIT) + */ +class RedFile extends DAV\Node implements DAV\IFile { + + /** + * The file from attach table. + * + * @var array + * data + * flags + * filename (string) + * filetype (string) + */ + private $data; + /** + * @see \Sabre\DAV\Auth\Backend\BackendInterface + * @var \RedMatrix\RedDAV\RedBasicAuth + */ + private $auth; + /** + * @var string + */ + private $name; + + /** + * Sets up the node, expects a full path name. + * + * @param string $name + * @param array $data from attach table + * @param &$auth + */ + public function __construct($name, $data, &$auth) { + $this->name = $name; + $this->data = $data; + $this->auth = $auth; + + //logger(print_r($this->data, true), LOGGER_DATA); + } + + /** + * @brief Returns the name of the file. + * + * @return string + */ + public function getName() { + //logger(basename($this->name), LOGGER_DATA); + return basename($this->name); + } + + /** + * @brief Renames the file. + * + * @throw Sabre\DAV\Exception\Forbidden + * @param string $name The new name of the file. + * @return void + */ + public function setName($newName) { + logger('old name ' . basename($this->name) . ' -> ' . $newName, LOGGER_DATA); + + if ((! $newName) || (! $this->auth->owner_id) || (! perm_is_allowed($this->auth->owner_id, $this->auth->observer, 'write_storage'))) { + logger('permission denied '. $newName); + throw new DAV\Exception\Forbidden('Permission denied.'); + } + + $newName = str_replace('/', '%2F', $newName); + + $r = q("UPDATE attach SET filename = '%s' WHERE hash = '%s' AND id = %d", + dbesc($this->data['filename']), + intval($this->data['id']) + ); + } + + /** + * @brief Updates the data of the file. + * + * @param resource $data + * @return void + */ + public function put($data) { + logger('put file: ' . basename($this->name), LOGGER_DEBUG); + $size = 0; + + // @todo only 3 values are needed + $c = q("SELECT * FROM channel WHERE channel_id = %d AND NOT (channel_pageflags & %d)>0 LIMIT 1", + intval($this->auth->owner_id), + intval(PAGE_REMOVED) + ); + + $r = q("SELECT flags, folder, data FROM attach WHERE hash = '%s' AND uid = %d LIMIT 1", + dbesc($this->data['hash']), + intval($c[0]['channel_id']) + ); + if ($r) { + if ($r[0]['flags'] & ATTACH_FLAG_OS) { + $f = 'store/' . $this->auth->owner_nick . '/' . (($r[0]['data']) ? $r[0]['data'] : ''); + // @todo check return value and set $size directly + @file_put_contents($f, $data); + $size = @filesize($f); + logger('filename: ' . $f . ' size: ' . $size, LOGGER_DEBUG); + } else { + $r = q("UPDATE attach SET data = '%s' WHERE hash = '%s' AND uid = %d", + dbesc(stream_get_contents($data)), + dbesc($this->data['hash']), + intval($this->data['uid']) + ); + $r = q("SELECT length(data) AS fsize FROM attach WHERE hash = '%s' AND uid = %d LIMIT 1", + dbesc($this->data['hash']), + intval($this->data['uid']) + ); + if ($r) { + $size = $r[0]['fsize']; + } + } + } + + // returns now() + $edited = datetime_convert(); + + $d = q("UPDATE attach SET filesize = '%s', edited = '%s' WHERE hash = '%s' AND uid = %d", + dbesc($size), + dbesc($edited), + dbesc($this->data['hash']), + intval($c[0]['channel_id']) + ); + + // update the folder's lastmodified timestamp + $e = q("UPDATE attach SET edited = '%s' WHERE hash = '%s' AND uid = %d", + dbesc($edited), + dbesc($r[0]['folder']), + intval($c[0]['channel_id']) + ); + + // @todo do we really want to remove the whole file if an update fails + // because of maxfilesize or quota? + // There is an Exception "InsufficientStorage" or "PaymentRequired" for + // our service class from SabreDAV we could use. + + $maxfilesize = get_config('system', 'maxfilesize'); + if (($maxfilesize) && ($size > $maxfilesize)) { + attach_delete($c[0]['channel_id'], $this->data['hash']); + return; + } + + $limit = service_class_fetch($c[0]['channel_id'], 'attach_upload_limit'); + if ($limit !== false) { + $x = q("select sum(filesize) as total from attach where aid = %d ", + intval($c[0]['channel_account_id']) + ); + if (($x) && ($x[0]['total'] + $size > $limit)) { + logger('service class limit exceeded for ' . $c[0]['channel_name'] . ' total usage is ' . $x[0]['total'] . ' limit is ' . $limit); + attach_delete($c[0]['channel_id'], $this->data['hash']); + return; + } + } + } + + /** + * @brief Returns the raw data. + * + * @return string + */ + public function get() { + logger('get file ' . basename($this->name), LOGGER_DEBUG); + + $r = q("SELECT data, flags, filename, filetype FROM attach WHERE hash = '%s' AND uid = %d LIMIT 1", + dbesc($this->data['hash']), + intval($this->data['uid']) + ); + if ($r) { + // @todo this should be a global definition + $unsafe_types = array('text/html', 'text/css', 'application/javascript'); + + if (in_array($r[0]['filetype'], $unsafe_types)) { + header('Content-disposition: attachment; filename="' . $r[0]['filename'] . '"'); + header('Content-type: text/plain'); + } + + if ($r[0]['flags'] & ATTACH_FLAG_OS ) { + $f = 'store/' . $this->auth->owner_nick . '/' . (($this->os_path) ? $this->os_path . '/' : '') . $r[0]['data']; + return fopen($f, 'rb'); + } + return $r[0]['data']; + } + } + + /** + * @brief Returns the ETag for a file. + * + * An ETag is a unique identifier representing the current version of the file. + * If the file changes, the ETag MUST change. + * The ETag is an arbitrary string, but MUST be surrounded by double-quotes. + * + * Return null if the ETag can not effectively be determined. + * + * @return null|string + */ + public function getETag() { + $ret = null; + if ($this->data['hash']) { + $ret = '"' . $this->data['hash'] . '"'; + } + return $ret; + } + + /** + * @brief Returns the mime-type for a file. + * + * If null is returned, we'll assume application/octet-stream + * + * @return mixed + */ + public function getContentType() { + // @todo this should be a global definition. + $unsafe_types = array('text/html', 'text/css', 'application/javascript'); + if (in_array($this->data['filetype'], $unsafe_types)) { + return 'text/plain'; + } + return $this->data['filetype']; + } + + /** + * @brief Returns the size of the node, in bytes. + * + * @return int + * filesize in bytes + */ + public function getSize() { + return $this->data['filesize']; + } + + /** + * @brief Returns the last modification time for the file, as a unix + * timestamp. + * + * @return int last modification time in UNIX timestamp + */ + public function getLastModified() { + return datetime_convert('UTC', 'UTC', $this->data['edited'], 'U'); + } + + /** + * @brief Delete the file. + * + * This method checks the permissions and then calls attach_delete() function + * to actually remove the file. + * + * @throw \Sabre\DAV\Exception\Forbidden + */ + public function delete() { + logger('delete file ' . basename($this->name), LOGGER_DEBUG); + + if ((! $this->auth->owner_id) || (! perm_is_allowed($this->auth->owner_id, $this->auth->observer, 'write_storage'))) { + throw new DAV\Exception\Forbidden('Permission denied.'); + } + + if ($this->auth->owner_id !== $this->auth->channel_id) { + if (($this->auth->observer !== $this->data['creator']) || ($this->data['flags'] & ATTACH_FLAG_DIR)) { + throw new DAV\Exception\Forbidden('Permission denied.'); + } + } + + attach_delete($this->auth->owner_id, $this->data['hash']); + } +}
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