<?php /** * @file include/attach.php * * @brief File/attach API with the potential for revision control. * * @TODO A filesystem storage abstraction which maintains security (and 'data' * contains a system filename which is inaccessible from the web). This could * get around PHP storage limits and store videos and larger items, using fread * or OS methods or native code to read/write or chunk it through. * @todo Also an 'append' option to the storage function might be a useful addition. */ require_once('include/permissions.php'); require_once('include/security.php'); /** * @brief Guess the mimetype from file ending. * * This function takes a file name and guess the mimetype from the * filename extension. * * @param $filename a string filename * @return string The mimetype according to a file ending. */ function z_mime_content_type($filename) { $mime_types = array( 'txt' => 'text/plain', 'htm' => 'text/html', 'html' => 'text/html', 'php' => 'text/html', 'css' => 'text/css', 'js' => 'application/javascript', 'json' => 'application/json', 'xml' => 'application/xml', 'swf' => 'application/x-shockwave-flash', 'flv' => 'video/x-flv', 'epub' => 'application/epub+zip', // images 'png' => 'image/png', 'jpe' => 'image/jpeg', 'jpeg' => 'image/jpeg', 'jpg' => 'image/jpeg', 'gif' => 'image/gif', 'bmp' => 'image/bmp', 'ico' => 'image/vnd.microsoft.icon', 'tiff' => 'image/tiff', 'tif' => 'image/tiff', 'svg' => 'image/svg+xml', 'svgz' => 'image/svg+xml', // archives 'zip' => 'application/zip', 'rar' => 'application/x-rar-compressed', 'exe' => 'application/x-msdownload', 'msi' => 'application/x-msdownload', 'cab' => 'application/vnd.ms-cab-compressed', // audio/video 'mp3' => 'audio/mpeg', 'wav' => 'audio/wav', 'qt' => 'video/quicktime', 'mov' => 'video/quicktime', 'ogg' => 'application/ogg', 'opus' => 'audio/ogg', 'webm' => 'video/webm', // 'webm' => 'audio/webm', 'mp4' => 'video/mp4', // 'mp4' => 'audio/mp4', // adobe 'pdf' => 'application/pdf', 'psd' => 'image/vnd.adobe.photoshop', 'ai' => 'application/postscript', 'eps' => 'application/postscript', 'ps' => 'application/postscript', // ms office 'doc' => 'application/msword', 'rtf' => 'application/rtf', 'xls' => 'application/vnd.ms-excel', 'ppt' => 'application/vnd.ms-powerpoint', // open office 'odt' => 'application/vnd.oasis.opendocument.text', 'ods' => 'application/vnd.oasis.opendocument.spreadsheet', 'odp' => 'application/vnd.oasis.opendocument.presentation', 'odg' => 'application/vnd.oasis.opendocument.graphics', 'odc' => 'application/vnd.oasis.opendocument.chart', 'odf' => 'application/vnd.oasis.opendocument.formula', 'odi' => 'application/vnd.oasis.opendocument.image', 'odm' => 'application/vnd.oasis.opendocument.text-master', 'odb' => 'application/vnd.oasis.opendocument.base', 'odb' => 'application/vnd.oasis.opendocument.database', 'ott' => 'application/vnd.oasis.opendocument.text-template', 'ots' => 'application/vnd.oasis.opendocument.spreadsheet-template', 'otp' => 'application/vnd.oasis.opendocument.presentation-template', 'otg' => 'application/vnd.oasis.opendocument.graphics-template', 'otc' => 'application/vnd.oasis.opendocument.chart-template', 'otf' => 'application/vnd.oasis.opendocument.formula-template', 'oti' => 'application/vnd.oasis.opendocument.image-template', 'oth' => 'application/vnd.oasis.opendocument.text-web' ); $dot = strpos($filename, '.'); if ($dot !== false) { $ext = strtolower(substr($filename, $dot + 1)); if (array_key_exists($ext, $mime_types)) { return $mime_types[$ext]; } } return 'application/octet-stream'; } /** * @brief Count files/attachments. * * @param int $channel_id * @param string $observer * @param string $hash (optional) * @param string $filename (optional) * @param string $filetype (optional) * @return associative array with: * * \e boolean \b success * * \e int|boolean \b results amount of found results, or false * * \e string \b message with error messages if any */ function attach_count_files($channel_id, $observer, $hash = '', $filename = '', $filetype = '') { $ret = array('success' => false); if(! perm_is_allowed($channel_id, $observer, 'read_storage')) { $ret['message'] = t('Permission denied.'); return $ret; } require_once('include/security.php'); $sql_extra = permissions_sql($channel_id); if($hash) $sql_extra .= protect_sprintf(" and hash = '" . dbesc($hash) . "' "); if($filename) $sql_extra .= protect_sprintf(" and filename like '@" . dbesc($filename) . "@' "); if($filetype) $sql_extra .= protect_sprintf(" and filetype like '@" . dbesc($filetype) . "@' "); $r = q("select id from attach where uid = %d $sql_extra", intval($channel_id) ); $ret['success'] = ((is_array($r)) ? true : false); $ret['results'] = ((is_array($r)) ? count($r) : false); return $ret; } /** * @brief Returns a list of files/attachments. * * @param $channel_id * @param $observer * @param $hash (optional) * @param $filename (optional) * @param $filetype (optional) * @param $orderby * @param $start * @param $entries * @return associative array with: * * \e boolean \b success * * \e array|boolean \b results array with results, or false * * \e string \b message with error messages if any */ function attach_list_files($channel_id, $observer, $hash = '', $filename = '', $filetype = '', $orderby = 'created desc', $start = 0, $entries = 0) { $ret = array('success' => false); if(! perm_is_allowed($channel_id,$observer, 'read_storage')) { $ret['message'] = t('Permission denied.'); return $ret; } require_once('include/security.php'); $sql_extra = permissions_sql($channel_id); if($hash) $sql_extra .= protect_sprintf(" and hash = '" . dbesc($hash) . "' "); if($filename) $sql_extra .= protect_sprintf(" and filename like '@" . dbesc($filename) . "@' "); if($filetype) $sql_extra .= protect_sprintf(" and filetype like '@" . dbesc($filetype) . "@' "); if($entries) $limit = " limit " . intval($start) . ", " . intval(entries) . " "; // Retrieve all columns except 'data' $r = q("select id, aid, uid, hash, filename, filetype, filesize, revision, folder, flags, created, edited, allow_cid, allow_gid, deny_cid, deny_gid from attach where uid = %d $sql_extra $orderby $limit", intval($channel_id) ); $ret['success'] = ((is_array($r)) ? true : false); $ret['results'] = ((is_array($r)) ? $r : false); return $ret; } /** * @brief Find an attachment by hash and revision. * * Returns the entire attach structure including data. * * This could exhaust memory so most useful only when immediately sending the data. * * @param string $hash * @param int $rev Revision * @return array */ function attach_by_hash($hash, $rev = 0) { $ret = array('success' => false); // Check for existence, which will also provide us the owner uid $sql_extra = ''; if($rev == (-1)) $sql_extra = " order by revision desc "; elseif($rev) $sql_extra = " and revision = " . intval($rev) . " "; $r = q("SELECT uid FROM attach WHERE hash = '%s' $sql_extra LIMIT 1", dbesc($hash) ); if(! $r) { $ret['message'] = t('Item was not found.'); return $ret; } if(! perm_is_allowed($r[0]['uid'], get_observer_hash(), 'view_storage')) { $ret['message'] = t('Permission denied.'); return $ret; } $sql_extra = permissions_sql($r[0]['uid']); // Now we'll see if we can access the attachment $r = q("SELECT * FROM attach WHERE hash = '%s' and uid = %d $sql_extra LIMIT 1", dbesc($hash), intval($r[0]['uid']) ); if(! $r) { $ret['message'] = t('Permission denied.'); return $ret; } $ret['success'] = true; $ret['data'] = $r[0]; return $ret; } /** * @brief Find an attachment by hash and revision. * * Returns the entire attach structure excluding data. * * @see attach_by_hash() * @param $hash * @param $rev revision default 0 * @return associative array with everything except data * * \e boolean \b success boolean true or false * * \e string \b message (optional) only when success is false * * \e array \b data array of attach DB entry without data component */ function attach_by_hash_nodata($hash, $rev = 0) { $ret = array('success' => false); // Check for existence, which will also provide us the owner uid $sql_extra = ''; if($rev == (-1)) $sql_extra = " order by revision desc "; elseif($rev) $sql_extra = " and revision = " . intval($rev) . " "; $r = q("SELECT uid FROM attach WHERE hash = '%s' $sql_extra LIMIT 1", dbesc($hash) ); if(! $r) { $ret['message'] = t('Item was not found.'); return $ret; } if(! perm_is_allowed($r[0]['uid'],get_observer_hash(),'view_storage')) { $ret['message'] = t('Permission denied.'); return $ret; } $sql_extra = permissions_sql($r[0]['uid']); // Now we'll see if we can access the attachment $r = q("select id, aid, uid, hash, creator, filename, filetype, filesize, revision, folder, flags, created, edited, allow_cid, allow_gid, deny_cid, deny_gid from attach where uid = %d and hash = '%s' $sql_extra limit 1", intval($r[0]['uid']), dbesc($hash) ); if(! $r) { $ret['message'] = t('Permission denied.'); return $ret; } $ret['success'] = true; $ret['data'] = $r[0]; return $ret; } /** * @brief Stores an attachment from a POST file upload. * * This function stores an attachment. It can be a new one, a replacement or a * new revision depending on value set in \e $options. * * @note Requires an input field \e userfile and does not accept multiple files * in one request. * * @param array $channel channel array of owner * @param string $observer_hash hash of current observer * @param string $options (optional) one of update, replace, revision * @param array $arr (optional) associative array */ function attach_store($channel, $observer_hash, $options = '', $arr = null) { $ret = array('success' => false); $channel_id = $channel['channel_id']; $sql_options = ''; if(! perm_is_allowed($channel_id,get_observer_hash(), 'write_storage')) { $ret['message'] = t('Permission denied.'); return $ret; } // The 'update' option sets db values without uploading a new attachment // 'replace' replaces the existing uploaded data // 'revision' creates a new revision with new upload data // Default is to upload a new file // revise or update must provide $arr['hash'] of the thing to revise/update if($options !== 'update') { if(! x($_FILES,'userfile')) { $ret['message'] = t('No source file.'); return $ret; } $src = $_FILES['userfile']['tmp_name']; $filename = basename($_FILES['userfile']['name']); $filesize = intval($_FILES['userfile']['size']); } $existing_size = 0; if($options === 'replace') { /** @BUG $replace is undefined here */ $x = q("select id, hash, filesize from attach where id = %d and uid = %d limit 1", intval($replace), intval($channel_id) ); if(! $x) { $ret['message'] = t('Cannot locate file to replace'); return $ret; } $existing_id = $x[0]['id']; $existing_size = intval($x[0]['filesize']); $hash = $x[0]['hash']; } if($options === 'revise' || $options === 'update') { $sql_options = " order by revision desc "; if($options === 'update' && $arr && array_key_exists('revision',$arr)) $sql_options = " and revision = " . intval($arr['revision']) . " "; $x = q("select id, aid, uid, filename, filetype, filesize, hash, revision, folder, flags, created, edited, allow_cid, allow_gid, deny_cid, deny_gid from attach where hash = '%s' and uid = %d $sql_options limit 1", dbesc($arr['hash']), intval($channel_id) ); if(! $x) { $ret['message'] = t('Cannot locate file to revise/update'); return $ret; } $hash = $x[0]['hash']; } // Check storage limits if($options !== 'update') { $maxfilesize = get_config('system','maxfilesize'); if(($maxfilesize) && ($filesize > $maxfilesize)) { $ret['message'] = sprintf( t('File exceeds size limit of %d'), $maxfilesize); @unlink($src); return $ret; } $limit = service_class_fetch($channel_id, 'attach_upload_limit'); if($limit !== false) { $r = q("select sum(filesize) as total from attach where aid = %d ", intval($channel['channel_account_id']) ); if(($r) && (($r[0]['total'] + $filesize) > ($limit - $existing_size))) { $ret['message'] = upgrade_message(true) . sprintf(t("You have reached your limit of %1$.0f Mbytes attachment storage."), $limit / 1024000); @unlink($src); return $ret; } } $mimetype = z_mime_content_type($filename); } if(! isset($hash)) $hash = random_string(); $created = datetime_convert(); if($options === 'replace') { $r = q("update attach set filename = '%s', filetype = '%s', filesize = %d, data = '%s', edited = '%s' where id = %d and uid = %d", dbesc($filename), dbesc($mimetype), intval($filesize), dbescbin(@file_get_contents($src)), dbesc($created), intval($existing_id), intval($channel_id) ); } elseif($options === 'revise') { $r = q("insert into attach ( aid, uid, hash, creator, filename, filetype, filesize, revision, data, created, edited, allow_cid, allow_gid, deny_cid, deny_gid ) VALUES ( %d, %d, '%s', '%s', '%s', '%s', %d, %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s' ) ", intval($x[0]['aid']), intval($channel_id), dbesc($x[0]['hash']), dbesc(get_observer_hash()), dbesc($filename), dbesc($mimetype), intval($filesize), intval($x[0]['revision'] + 1), dbescbin(@file_get_contents($src)), dbesc($created), dbesc($created), dbesc($x[0]['allow_cid']), dbesc($x[0]['allow_gid']), dbesc($x[0]['deny_cid']), dbesc($x[0]['deny_gid']) ); } elseif($options === 'update') { $r = q("update attach set filename = '%s', filetype = '%s', edited = '%s', allow_cid = '%s', allow_gid = '%s', deny_cid = '%s', deny_gid = '%s' where id = %d and uid = %d", dbesc((array_key_exists('filename',$arr)) ? $arr['filename'] : $x[0]['filename']), dbesc((array_key_exists('filetype',$arr)) ? $arr['filetype'] : $x[0]['filetype']), dbesc($created), dbesc((array_key_exists('allow_cid',$arr)) ? $arr['allow_cid'] : $x[0]['allow_cid']), dbesc((array_key_exists('allow_gid',$arr)) ? $arr['allow_gid'] : $x[0]['allow_gid']), dbesc((array_key_exists('deny_cid',$arr)) ? $arr['deny_cid'] : $x[0]['deny_cid']), dbesc((array_key_exists('deny_gid',$arr)) ? $arr['deny_gid'] : $x[0]['deny_gid']), intval($x[0]['id']), intval($x[0]['uid']) ); } else { $r = q("INSERT INTO attach ( aid, uid, hash, creator, filename, filetype, filesize, revision, data, created, edited, allow_cid, allow_gid,deny_cid, deny_gid ) VALUES ( %d, %d, '%s', '%s', '%s', '%s', %d, %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s' ) ", intval($channel['channel_account_id']), intval($channel_id), dbesc($hash), dbesc(get_observer_hash()), dbesc($filename), dbesc($mimetype), intval($filesize), intval(0), dbescbin(@file_get_contents($src)), dbesc($created), dbesc($created), dbesc(($arr && array_key_exists('allow_cid',$arr)) ? $arr['allow_cid'] : '<' . $channel['channel_hash'] . '>'), dbesc(($arr && array_key_exists('allow_gid',$arr)) ? $arr['allow_gid'] : ''), dbesc(($arr && array_key_exists('deny_cid',$arr)) ? $arr['deny_cid'] : ''), dbesc(($arr && array_key_exists('deny_gid',$arr)) ? $arr['deny_gid'] : '') ); } if($options !== 'update') @unlink($src); if(! $r) { $ret['message'] = t('File upload failed. Possible system limit or action terminated.'); return $ret; } // Caution: This re-uses $sql_options set further above $r = q("select id, aid, uid, hash, creator, filename, filetype, filesize, revision, folder, flags, created, edited, allow_cid, allow_gid, deny_cid, deny_gid from attach where uid = %d and hash = '%s' $sql_options limit 1", intval($channel_id), dbesc($hash) ); if(! $r) { $ret['message'] = t('Stored file could not be verified. Upload failed.'); return $ret; } $ret['success'] = true; $ret['data'] = $r[0]; return $ret; } /** * @brief Read a virtual directory and return contents. * * Also checking permissions of all parent components. * * @param integer $channel_id * @param string $observer_hash hash of current observer * @param string $pathname * @param string $parent_hash (optional) * * @return array $ret * * \e boolean \b success boolean true or false * * \e string \b message error message if success is false * * \e array \b data array of attach DB entries without data component */ function z_readdir($channel_id, $observer_hash, $pathname, $parent_hash = '') { $ret = array('success' => false); if(! perm_is_allowed($channel_id, get_observer_hash(), 'view_storage')) { $ret['message'] = t('Permission denied.'); return $ret; } if(strpos($pathname, '/')) { $paths = explode('/', $pathname); if(count($paths) > 1) { $curpath = array_shift($paths); $r = q("select hash, id from attach where uid = %d and filename = '%s' and (flags & %d )>0 " . permissions_sql($channel_id) . " limit 1", intval($channel_id), dbesc($curpath), intval(ATTACH_FLAG_DIR) ); if(! $r) { $ret['message'] = t('Path not available.'); return $ret; } return z_readdir($channel_id, $observer_hash, implode('/', $paths), $r[0]['hash']); } } else $paths = array($pathname); $r = q("select id, aid, uid, hash, creator, filename, filetype, filesize, revision, folder, flags, created, edited, allow_cid, allow_gid, deny_cid, deny_gid from attach where id = %d and folder = '%s' and filename = '%s' and (flags & %d )>0 " . permissions_sql($channel_id), intval($channel_id), dbesc($parent_hash), dbesc($paths[0]), intval(ATTACH_FLAG_DIR) ); if(! $r) { $ret['message'] = t('Path not available.'); return $ret; } $ret['success'] = true; $ret['data'] = $r; return $ret; } /** * @brief Create directory. * * @param array $channel channel array of owner * @param string $observer_hash hash of current observer * @param array $arr parameter array to fulfil request * - Required: * * \e string \b filename * * \e string \b folder hash of parent directory, empty string for root directory * - Optional: * * \e string \b hash precumputed hash for this node * * \e tring \b allow_cid * * \e string \b allow_gid * * \e string \b deny_cid * * \e string \b deny_gid * @return array */ function attach_mkdir($channel, $observer_hash, $arr = null) { $ret = array('success' => false); $channel_id = $channel['channel_id']; $sql_options = ''; $basepath = 'store/' . $channel['channel_address']; logger('attach_mkdir: basepath: ' . $basepath); if(! is_dir($basepath)) os_mkdir($basepath,STORAGE_DEFAULT_PERMISSIONS, true); if(! perm_is_allowed($channel_id, $observer_hash, 'write_storage')) { $ret['message'] = t('Permission denied.'); return $ret; } if(! $arr['filename']) { $ret['message'] = t('Empty pathname'); return $ret; } $arr['hash'] = (($arr['hash']) ? $arr['hash'] : random_string()); // Check for duplicate name. // Check both the filename and the hash as we will be making use of both. $r = q("select hash from attach where ( filename = '%s' or hash = '%s' ) and folder = '%s' and uid = %d limit 1", dbesc($arr['filename']), dbesc($arr['hash']), dbesc($arr['folder']), intval($channel['channel_id']) ); if($r) { $ret['message'] = t('duplicate filename or path'); return $ret; } if($arr['folder']) { // Walk the directory tree from parent back to root to make sure the parent is valid and name is unique and we // have permission to see this path. This implies the root directory itself is public since we won't have permissions // set on the psuedo-directory. We can however set permissions for anything and everything contained within it. $lpath = ''; $lfile = $arr['folder']; $sql_options = permissions_sql($channel['channel_id']); do { $r = q("select filename, hash, flags, folder from attach where uid = %d and hash = '%s' and ( flags & %d )>0 $sql_options limit 1", intval($channel['channel_id']), dbesc($lfile), intval(ATTACH_FLAG_DIR) ); if(! $r) { logger('attach_mkdir: hash ' . $lfile . ' not found in ' . $lpath); $ret['message'] = t('Path not found.'); return $ret; } if($lfile) $lpath = $r[0]['hash'] . '/' . $lpath; $lfile = $r[0]['folder']; } while ( ($r[0]['folder']) && ($r[0]['flags'] & ATTACH_FLAG_DIR)) ; $path = $basepath . '/' . $lpath; } else $path = $basepath . '/'; $path .= $arr['hash']; $created = datetime_convert(); $r = q("INSERT INTO attach ( aid, uid, hash, creator, filename, filetype, filesize, revision, folder, flags, data, created, edited, allow_cid, allow_gid, deny_cid, deny_gid ) VALUES ( %d, %d, '%s', '%s', '%s', '%s', %d, %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s' ) ", intval($channel['channel_account_id']), intval($channel_id), dbesc($arr['hash']), dbesc(get_observer_hash()), dbesc($arr['filename']), dbesc('multipart/mixed'), intval(0), intval(0), dbesc($arr['folder']), intval(ATTACH_FLAG_DIR|ATTACH_FLAG_OS), dbesc($path), dbesc($created), dbesc($created), dbesc(($arr && array_key_exists('allow_cid',$arr)) ? $arr['allow_cid'] : $channel['channel_allow_cid']), dbesc(($arr && array_key_exists('allow_gid',$arr)) ? $arr['allow_gid'] : $channel['channel_allow_gid']), dbesc(($arr && array_key_exists('deny_cid',$arr)) ? $arr['deny_cid'] : $channel['channel_deny_cid']), dbesc(($arr && array_key_exists('deny_gid',$arr)) ? $arr['deny_gid'] : $channel['channel_deny_gid']) ); if($r) { if(os_mkdir($path, STORAGE_DEFAULT_PERMISSIONS, true)) { $ret['success'] = true; $ret['data'] = $arr; // update the parent folder's lastmodified timestamp $e = q("UPDATE attach SET edited = '%s' WHERE hash = '%s' AND uid = %d", dbesc($created), dbesc($arr['folder']), intval($channel_id) ); } else { logger('attach_mkdir: ' . mkdir . ' ' . $path . ' failed.'); $ret['message'] = t('mkdir failed.'); } } else { $ret['message'] = t('database storage failed.'); } return $ret; } /** * @brief Changes permissions of a file. * * @param int $channel_id * @param array $resource * @param string $allow_cid * @param string $allow_gid * @param string $deny_cid * @param string $deny_gid * @param boolean $recurse (optional) default false */ function attach_change_permissions($channel_id, $resource, $allow_cid, $allow_gid, $deny_cid, $deny_gid, $recurse = false) { $r = q("select hash, flags from attach where hash = '%s' and uid = %d limit 1", dbesc($resource), intval($channel_id) ); if(! $r) return; if($r[0]['flags'] & ATTACH_FLAG_DIR) { if($recurse) { $r = q("select hash, flags from attach where folder = '%s' and uid = %d", dbesc($resource), intval($channel_id) ); if($r) { foreach($r as $rr) { attach_change_permissions($channel_id, $rr['hash'], $allow_cid, $allow_gid, $deny_cid, $deny_gid, $recurse); } } } } $x = q("update attach set allow_cid = '%s', allow_gid = '%s', deny_cid = '%s', deny_gid = '%s' where hash = '%s' and uid = %d", dbesc($allow_cid), dbesc($allow_gid), dbesc($deny_cid), dbesc($deny_gid), dbesc($resource), intval($channel_id) ); } /** * @brief Delete a file/directory from a channel. * * If the provided resource hash is from a directory it will delete everything * recursively under this directory. * * @param int $channel_id * The id of the channel * @param string $resource * The hash to delete * @return void */ function attach_delete($channel_id, $resource) { $c = q("SELECT channel_address FROM channel WHERE channel_id = %d LIMIT 1", intval($channel_id) ); $channel_address = (($c) ? $c[0]['channel_address'] : 'notfound'); $r = q("SELECT hash, flags, folder FROM attach WHERE hash = '%s' AND uid = %d limit 1", dbesc($resource), intval($channel_id) ); if(! $r) return; $cloudpath = get_parent_cloudpath($channel_id, $channel_address, $resource); $object = get_file_activity_object($channel_id, $resource, $cloudpath); // If resource is a directory delete everything in the directory recursive if($r[0]['flags'] & ATTACH_FLAG_DIR) { $x = q("SELECT hash, flags FROM attach WHERE folder = '%s' AND uid = %d", dbesc($resource), intval($channel_id) ); if($x) { foreach($x as $xx) { attach_delete($channel_id, $xx['hash']); } } } // delete a file from filesystem if($r[0]['flags'] & ATTACH_FLAG_OS) { $y = q("SELECT data FROM attach WHERE hash = '%s' AND uid = %d LIMIT 1", dbesc($resource), intval($channel_id) ); if($y) { $f = 'store/' . $channel_address . '/' . $y[0]['data']; if(is_dir($y[0]['data'])) @rmdir($y[0]['data']); elseif(file_exists($f)) unlink($f); } } // delete from database $z = q("DELETE FROM attach WHERE hash = '%s' AND uid = %d", dbesc($resource), intval($channel_id) ); // update the parent folder's lastmodified timestamp $e = q("UPDATE attach SET edited = '%s' WHERE hash = '%s' AND uid = %d", dbesc(datetime_convert()), dbesc($r[0]['folder']), intval($channel_id) ); file_activity($channel_id, $object, $object['allow_cid'], $object['allow_gid'], $object['deny_cid'], $object['deny_gid'], 'update', $notify=0); } /** * @brief Returns path to file in cloud/. * * @warning This function cannot be used with mod/dav as it always returns a * path valid under mod/cloud. * * @param array $arr associative array with: * * \e int \b uid the channel's uid * * \e string \b folder * * \e string \b filename * @return string * path to the file in cloud/ */ function get_cloudpath($arr) { $basepath = 'cloud/'; if($arr['uid']) { $r = q("select channel_address from channel where channel_id = %d limit 1", intval($arr['uid']) ); if($r) $basepath .= $r[0]['channel_address'] . '/'; } $path = $basepath; if($arr['folder']) { $lpath = ''; $lfile = $arr['folder']; do { $r = q("select filename, hash, flags, folder from attach where uid = %d and hash = '%s' and ( flags & %d )>0 limit 1", intval($arr['uid']), dbesc($lfile), intval(ATTACH_FLAG_DIR) ); if(! $r) break; if($lfile) $lpath = $r[0]['filename'] . '/' . $lpath; $lfile = $r[0]['folder']; } while ( ($r[0]['folder']) && ($r[0]['flags'] & ATTACH_FLAG_DIR)); $path .= $lpath; } $path .= $arr['filename']; return $path; } /** * @brief Returns path to parent folder in cloud/. * This function cannot be used with mod/dav as it always returns a path valid under mod/cloud * * @param int $channel_id * The id of the channel * @param string $channel_name * The name of the channel * @param string $attachHash * @return string with the full folder path */ function get_parent_cloudpath($channel_id, $channel_name, $attachHash) { $parentFullPath = ''; // build directory tree $parentHash = $attachHash; do { $parentHash = find_folder_hash_by_attach_hash($channel_id, $parentHash); if ($parentHash) { $parentName = find_filename_by_hash($channel_id, $parentHash); $parentFullPath = $parentName . '/' . $parentFullPath; } } while ($parentHash); $parentFullPath = z_root() . '/cloud/' . $channel_name . '/' . $parentFullPath; return $parentFullPath; } /** * @brief Return the hash of an attachment's folder. * * @param int $channel_id * The id of the channel * @param string $attachHash * The hash of the attachment * @return string */ function find_folder_hash_by_attach_hash($channel_id, $attachHash) { $r = q("SELECT folder FROM attach WHERE uid = %d AND hash = '%s' LIMIT 1", intval($channel_id), dbesc($attachHash) ); $hash = ''; if ($r) { $hash = $r[0]['folder']; } return $hash; } /** * @brief Returns the filename of an attachment in a given channel. * * @param int $channel_id * The id of the channel * @param string $attachHash * The hash of the attachment * @return string * The filename of the attachment */ function find_filename_by_hash($channel_id, $attachHash) { $r = q("SELECT filename FROM attach WHERE uid = %d AND hash = '%s' LIMIT 1", intval($channel_id), dbesc($attachHash) ); $filename = ''; if ($r) { $filename = $r[0]['filename']; } return $filename; } /** * * @param $in * @param $out */ function pipe_streams($in, $out) { $size = 0; while (!feof($in)) $size += fwrite($out, fread($in, 8192)); return $size; } /** * @brief Activity for files. * * @param int $channel_id * @param array $object * @param string $allow_cid * @param string $allow_gid * @param string $deny_cid * @param string $deny_gid * @param string $verb * @param boolean $no_activity */ function file_activity($channel_id, $object, $allow_cid, $allow_gid, $deny_cid, $deny_gid, $verb, $notify) { require_once('include/items.php'); $poster = get_app()->get_observer(); //if we got no object something went wrong if(!$object) return; //turn strings into arrays $arr_allow_cid = expand_acl($allow_cid); $arr_allow_gid = expand_acl($allow_gid); $arr_deny_cid = expand_acl($deny_cid); $arr_deny_gid = expand_acl($deny_gid); //filter out receivers which do not have permission to view filestorage $arr_allow_cid = check_list_permissions($channel_id, $arr_allow_cid, 'view_storage'); $is_dir = (($object['flags'] & ATTACH_FLAG_DIR) ? true : false); //do not send activity for folders for now if($is_dir) return; //check for recursive perms if we are in a folder if($object['folder']) { $folder_hash = $object['folder']; $r_perms = recursive_activity_recipients($arr_allow_cid, $arr_allow_gid, $arr_deny_cid, $arr_deny_gid, $folder_hash); //split up returned perms $arr_allow_cid = $r_perms['allow_cid']; $arr_allow_gid = $r_perms['allow_gid']; $arr_deny_cid = $r_perms['deny_cid']; $arr_deny_gid = $r_perms['deny_gid']; //filter out receivers which do not have permission to view filestorage $arr_allow_cid = check_list_permissions($channel_id, $arr_allow_cid, 'view_storage'); } $mid = item_message_id(); $objtype = ACTIVITY_OBJ_FILE; $item_flags = ITEM_WALL|ITEM_ORIGIN; $private = (($arr_allow_cid[0] || $arr_allow_gid[0] || $arr_deny_cid[0] || $arr_deny_gid[0]) ? 1 : 0); $jsonobject = json_encode($object); //check if item for this object exists $y = q("SELECT mid FROM item WHERE verb = '%s' AND obj_type = '%s' AND resource_id = '%s' AND uid = %d LIMIT 1", dbesc(ACTIVITY_POST), dbesc($objtype), dbesc($object['hash']), intval(local_channel()) ); if($y) { $update = true; $object['d_mid'] = $y[0]['mid']; //attach mid of the old object $u_jsonobject = json_encode($object); //we have got the relevant info - delete the old item before we create the new one $z = q("DELETE FROM item WHERE obj_type = '%s' AND verb = '%s' AND mid = '%s'", dbesc(ACTIVITY_OBJ_FILE), dbesc(ACTIVITY_POST), dbesc($y[0]['mid']) ); } if($update && $verb == 'post' ) { //send update activity and create a new one //updates should be sent to everybody with recursive perms and all eventual former allowed members ($object['allow_cid'] etc.). $u_arr_allow_cid = array_unique(array_merge($arr_allow_cid, expand_acl($object['allow_cid']))); $u_arr_allow_gid = array_unique(array_merge($arr_allow_gid, expand_acl($object['allow_gid']))); $u_arr_deny_cid = array_unique(array_merge($arr_deny_cid, expand_acl($object['deny_cid']))); $u_arr_deny_gid = array_unique(array_merge($arr_deny_gid, expand_acl($object['deny_gid']))); $u_mid = item_message_id(); $arr = array(); $arr['aid'] = get_account_id(); $arr['uid'] = $channel_id; $arr['mid'] = $u_mid; $arr['parent_mid'] = $u_mid; $arr['item_flags'] = $item_flags; $arr['item_unseen'] = 1; $arr['author_xchan'] = $poster['xchan_hash']; $arr['owner_xchan'] = $poster['xchan_hash']; $arr['title'] = ''; $arr['allow_cid'] = perms2str($u_arr_allow_cid); $arr['allow_gid'] = perms2str($u_arr_allow_gid); $arr['deny_cid'] = perms2str($u_arr_deny_cid); $arr['deny_gid'] = perms2str($u_arr_deny_gid); $arr['item_restrict'] = ITEM_HIDDEN; $arr['item_private'] = $private; $arr['verb'] = ACTIVITY_UPDATE; $arr['obj_type'] = $objtype; $arr['object'] = $u_jsonobject; $arr['resource_id'] = $object['hash']; $arr['resource_type'] = 'attach'; $arr['body'] = ''; $post = item_store($arr); $item_id = $post['item_id']; if($item_id) { proc_run('php',"include/notifier.php","activity",$item_id); } call_hooks('post_local_end', $arr); $update = false; //notice( t('File activity updated') . EOL); } if(! $notify) { return; } $arr = array(); $arr['aid'] = get_account_id(); $arr['uid'] = $channel_id; $arr['mid'] = $mid; $arr['parent_mid'] = $mid; $arr['item_flags'] = $item_flags; $arr['item_unseen'] = 1; $arr['author_xchan'] = $poster['xchan_hash']; $arr['owner_xchan'] = $poster['xchan_hash']; $arr['title'] = ''; $arr['allow_cid'] = perms2str($arr_allow_cid); $arr['allow_gid'] = perms2str($arr_allow_gid); $arr['deny_cid'] = perms2str($arr_deny_cid); $arr['deny_gid'] = perms2str($arr_deny_gid); $arr['item_restrict'] = ITEM_HIDDEN; $arr['item_private'] = $private; $arr['verb'] = (($update) ? ACTIVITY_UPDATE : ACTIVITY_POST); $arr['obj_type'] = $objtype; $arr['resource_id'] = $object['hash']; $arr['resource_type'] = 'attach'; $arr['object'] = (($update) ? $u_jsonobject : $jsonobject); $arr['body'] = ''; $post = item_store($arr); $item_id = $post['item_id']; if($item_id) { proc_run('php',"include/notifier.php","activity",$item_id); } call_hooks('post_local_end', $arr); //(($verb === 'post') ? notice( t('File activity posted') . EOL) : notice( t('File activity dropped') . EOL)); return; } /** * @brief Create file activity object * * @param int $channel_id * @param string $hash * @param string $cloudpath */ function get_file_activity_object($channel_id, $hash, $cloudpath) { $x = q("SELECT creator, filename, filetype, filesize, revision, folder, flags, created, edited, allow_cid, allow_gid, deny_cid, deny_gid FROM attach WHERE uid = %d AND hash = '%s' LIMIT 1", intval($channel_id), dbesc($hash) ); $url = rawurlencode($cloudpath . $x[0]['filename']); $links = array(); $links[] = array( 'rel' => 'alternate', 'type' => 'text/html', 'href' => $url ); $object = array( 'type' => ACTIVITY_OBJ_FILE, 'title' => $x[0]['filename'], 'id' => $url, 'link' => $links, 'hash' => $hash, 'creator' => $x[0]['creator'], 'filename' => $x[0]['filename'], 'filetype' => $x[0]['filetype'], 'filesize' => $x[0]['filesize'], 'revision' => $x[0]['revision'], 'folder' => $x[0]['folder'], 'flags' => $x[0]['flags'], 'created' => $x[0]['created'], 'edited' => $x[0]['edited'], 'allow_cid' => $x[0]['allow_cid'], 'allow_gid' => $x[0]['allow_gid'], 'deny_cid' => $x[0]['deny_cid'], 'deny_gid' => $x[0]['deny_gid'] ); return $object; } /** * @brief Returns array of channels which have recursive permission for a file * * @param $arr_allow_cid * @param $arr_allow_gid * @param $arr_deny_cid * @param $arr_deny_gid * @param $folder_hash */ function recursive_activity_recipients($arr_allow_cid, $arr_allow_gid, $arr_deny_cid, $arr_deny_gid, $folder_hash) { $ret = array(); $parent_arr = array(); $count_values = array(); $poster = get_app()->get_observer(); //turn allow_gid into allow_cid's foreach($arr_allow_gid as $gid) { $in_group = in_group($gid); $arr_allow_cid = array_unique(array_merge($arr_allow_cid, $in_group)); } $count = 0; while($folder_hash) { $x = q("SELECT allow_cid, allow_gid, deny_cid, deny_gid, folder FROM attach WHERE hash = '%s' LIMIT 1", dbesc($folder_hash) ); //only process private folders if($x[0]['allow_cid'] || $x[0]['allow_gid'] || $x[0]['deny_cid'] || $x[0]['deny_gid']) { $parent_arr['allow_cid'][] = expand_acl($x[0]['allow_cid']); $parent_arr['allow_gid'][] = expand_acl($x[0]['allow_gid']); /** * @TODO should find a much better solution for the allow_cid <-> allow_gid problem. * Do not use allow_gid for now. Instead lookup the members of the group directly and add them to allow_cid. * */ if($parent_arr['allow_gid']) { foreach($parent_arr['allow_gid'][$count] as $gid) { $in_group = in_group($gid); $parent_arr['allow_cid'][$count] = array_unique(array_merge($parent_arr['allow_cid'][$count], $in_group)); } } $parent_arr['deny_cid'][] = expand_acl($x[0]['deny_cid']); $parent_arr['deny_gid'][] = expand_acl($x[0]['deny_gid']); $count++; } $folder_hash = $x[0]['folder']; } //if none of the parent folders is private just return file perms if(!$parent_arr['allow_cid'] && !$parent_arr['allow_gid'] && !$parent_arr['deny_cid'] && !$parent_arr['deny_gid']) { $ret['allow_gid'] = $arr_allow_gid; $ret['allow_cid'] = $arr_allow_cid; $ret['deny_gid'] = $arr_deny_gid; $ret['deny_cid'] = $arr_deny_cid; return $ret; } //if there are no perms on the file we get them from the first parent folder if(!$arr_allow_cid && !$arr_allow_gid && !$arr_deny_cid && !$arr_deny_gid) { $arr_allow_cid = $parent_arr['allow_cid'][0]; $arr_allow_gid = $parent_arr['allow_gid'][0]; $arr_deny_cid = $parent_arr['deny_cid'][0]; $arr_deny_gid = $parent_arr['deny_gid'][0]; } //allow_cid $r_arr_allow_cid = false; foreach ($parent_arr['allow_cid'] as $folder_arr_allow_cid) { foreach ($folder_arr_allow_cid as $ac_hash) { $count_values[$ac_hash]++; } } foreach ($arr_allow_cid as $fac_hash) { if($count_values[$fac_hash] == $count) $r_arr_allow_cid[] = $fac_hash; } //allow_gid $r_arr_allow_gid = false; foreach ($parent_arr['allow_gid'] as $folder_arr_allow_gid) { foreach ($folder_arr_allow_gid as $ag_hash) { $count_values[$ag_hash]++; } } foreach ($arr_allow_gid as $fag_hash) { if($count_values[$fag_hash] == $count) $r_arr_allow_gid[] = $fag_hash; } //deny_gid foreach($parent_arr['deny_gid'] as $folder_arr_deny_gid) { $r_arr_deny_gid = array_merge($arr_deny_gid, $folder_arr_deny_gid); } $r_arr_deny_gid = array_unique($r_arr_deny_gid); //deny_cid foreach($parent_arr['deny_cid'] as $folder_arr_deny_cid) { $r_arr_deny_cid = array_merge($arr_deny_cid, $folder_arr_deny_cid); } $r_arr_deny_cid = array_unique($r_arr_deny_cid); //if none is allowed restrict to self if(($r_arr_allow_gid === false) && ($r_arr_allow_cid === false)) { $ret['allow_cid'] = $poster['xchan_hash']; } else { $ret['allow_gid'] = $r_arr_allow_gid; $ret['allow_cid'] = $r_arr_allow_cid; $ret['deny_gid'] = $r_arr_deny_gid; $ret['deny_cid'] = $r_arr_deny_cid; } return $ret; } /** * @brief Returns members of a group. * * @param int $group_id id of the group to look up */ function in_group($group_id) { $group_members = array(); /** @TODO make these two queries one with a join. */ $x = q("SELECT id FROM groups WHERE hash = '%s'", dbesc($group_id) ); $r = q("SELECT xchan FROM group_member WHERE gid = %d", intval($x[0]['id']) ); foreach($r as $ig) { $group_members[] = $ig['xchan']; } return $group_members; }