getStorage()->getLocalFile($file->getInternalPath()); if (!\is_string($path)) { throw new \Exception('Failed to get local file path'); } $exif = self::getExifFromLocalPath($path); // We need to remove blacklisted fields to prevent leaking info unset($exif['SourceFile'], $exif['FileName'], $exif['ExifToolVersion'], $exif['Directory'], $exif['FileSize'], $exif['FileModifyDate'], $exif['FileAccessDate'], $exif['FileInodeChangeDate'], $exif['FilePermissions'], $exif['ThumbnailImage']); // Ignore zero dates $dateFields = [ 'DateTimeOriginal', 'SubSecDateTimeOriginal', 'CreateDate', 'ModifyDate', 'TrackCreateDate', 'TrackModifyDate', 'MediaCreateDate', 'MediaModifyDate', ]; foreach ($dateFields as $field) { if (\array_key_exists($field, $exif) && \is_string($exif[$field]) && str_starts_with($exif[$field], '0000:00:00')) { unset($exif[$field]); } } return $exif; } /** Get exif data as a JSON object from a local file path */ public static function getExifFromLocalPath(string &$path) { if (null !== self::$staticProc) { self::ensureStaticExiftoolProc(); return self::getExifFromLocalPathWithStaticProc($path); } return self::getExifFromLocalPathWithSeparateProc($path); } /** * Parse date from exif format and throw error if invalid. */ public static function parseExifDate(array $exif): \DateTime { // Get date from exif $exifDate = $exif['DateTimeOriginal'] ?? $exif['CreateDate'] ?? null; // For videos, prefer CreateDate for timezone (QuickTimeUTC=1) if (preg_match('/^video\/\w+/', (string) $exif['MIMEType'])) { $exifDate = $exif['CreateDate'] ?? $exifDate; } // Check if we have a date if (null === $exifDate || empty($exifDate) || !\is_string($exifDate)) { throw new \Exception('No date found in exif'); } // Get timezone from exif try { $exifTz = $exif['OffsetTimeOriginal'] ?? $exif['OffsetTime'] ?? $exif['LocationTZID'] ?? null; $exifTz = new \DateTimeZone($exifTz); } catch (\Error $e) { $exifTz = null; } // Force UTC if no timezone found $parseTz = $exifTz ?? new \DateTimeZone('UTC'); // https://github.com/pulsejet/memories/pull/397 // https://github.com/pulsejet/memories/issues/485 $formats = [ 'Y:m:d H:i', // 2023:03:05 18:58 'Y:m:d H:iO', // 2023:03:05 18:58+05:00 'Y:m:d H:i:s', // 2023:03:05 18:58:17 'Y:m:d H:i:sO', // 2023:03:05 10:58:17+05:00 'Y:m:d H:i:s.u', // 2023:03:05 10:58:17.000 'Y:m:d H:i:s.uO', // 2023:03:05 10:58:17.000Z ]; /** @var \DateTime $dt */ $parsedDate = null; foreach ($formats as $format) { if ($parsedDate = \DateTime::createFromFormat($format, $exifDate, $parseTz)) { break; } } // If we couldn't parse the date, throw an error if (!$parsedDate) { throw new \Exception("Invalid date: {$exifDate}"); } // Epoch timestamp $timestamp = $parsedDate->getTimestamp(); // Filter out dates before 1800 A.D. if ($timestamp < -5364662400) { // 1800 A.D. throw new \Exception("Date too old: {$exifDate}"); } // Filter out January 1, 1904 12:00:00 AM UTC // Exiftool returns this as the date when QuickTimeUTC is set and // the date is set to 0000:00:00 00:00:00 if (-2082844800 === $timestamp) { throw new \Exception("Blacklisted date: {$exifDate}"); } // Force the timezone to be the same as parseTz if ($exifTz) { $parsedDate->setTimezone($exifTz); } return $parsedDate; } /** * Get the date taken from either the file or exif data if available. */ public static function getDateTaken(File $file, array $exif): \DateTime { try { return self::parseExifDate($exif); } catch (\Exception $ex) { } catch (\ValueError $ex) { } // Fall back to modification time $dt = new \DateTime('@'.$file->getMtime()); // Set timezone to system timezone $tz = getenv('TZ') ?: date_default_timezone_get(); try { $dt->setTimezone(new \DateTimeZone($tz)); } catch (\Exception $e) { throw new \Error("FATAL: system timezone is invalid (TZ): {$tz}"); } return self::forgetTimezone($dt); } /** * Convert time to local date in UTC. */ public static function forgetTimezone(\DateTime $date): \DateTime { return new \DateTime($date->format('Y-m-d H:i:s'), new \DateTimeZone('UTC')); } /** * Get image dimensions from Exif data. * * @return array [width, height] */ public static function getDimensions(array &$exif) { $width = $exif['ImageWidth'] ?? 0; $height = $exif['ImageHeight'] ?? 0; // Check if image is rotated and we need to swap width and height $rotation = $exif['Rotation'] ?? 0; $orientation = $exif['Orientation'] ?? 0; if (\in_array($orientation, [5, 6, 7, 8], true) || \in_array($rotation, [90, 270], true)) { return [$height, $width]; } if ($width <= 0 || $height <= 0 || $width > 100000 || $height > 100000) { return [0, 0]; } return [$width, $height]; } /** * Get the list of MIME Types that are allowed to be edited. */ public static function allowedEditMimetypes(): array { return array_diff(array_merge(Application::IMAGE_MIMES, Application::VIDEO_MIMES), self::FORBIDDEN_EDIT_MIMES); } /** * Set exif data using raw json. * * @param string $path to local file * @param array $data exif data * * @throws \Exception on failure */ public static function setExif(string $path, array $data) { $data['SourceFile'] = $path; $raw = json_encode([$data]); $cmd = array_merge(self::getExiftool(), ['-json=-', $path]); $proc = proc_open($cmd, [ 0 => ['pipe', 'r'], 1 => ['pipe', 'w'], 2 => ['pipe', 'w'], ], $pipes); fwrite($pipes[0], $raw); fclose($pipes[0]); $stdout = self::readOrTimeout($pipes[1], self::EXIFTOOL_TIMEOUT); fclose($pipes[1]); fclose($pipes[2]); proc_terminate($proc); proc_close($proc); if (false !== strpos($stdout, 'error')) { error_log("Exiftool error: {$stdout}"); throw new \Exception('Could not set exif data: '.$stdout); } } public static function setFileExif(File $file, array $data) { // Get path to local file so we can skip reading $path = $file->getStorage()->getLocalFile($file->getInternalPath()); // Set exif data self::setExif($path, $data); // Update remote file if not local if (!$file->getStorage()->isLocal()) { $file->putContent(fopen($path, 'r')); // closes the handler } // Touch the file, triggering a reprocess through the hook $file->touch(); } public static function getBinaryExifProp(string $path, string $prop) { $pipes = []; $proc = proc_open(array_merge(self::getExiftool(), [$prop, '-n', '-b', $path]), [ 1 => ['pipe', 'w'], 2 => ['pipe', 'w'], ], $pipes); stream_set_blocking($pipes[1], false); try { return self::readOrTimeout($pipes[1], self::EXIFTOOL_TIMEOUT); } catch (\Exception $ex) { error_log("Exiftool timeout: [{$path}]"); throw new \Exception('Could not read from Exiftool'); } finally { fclose($pipes[1]); fclose($pipes[2]); proc_terminate($proc); proc_close($proc); } } public static function getExifWithDuplicates(string $path) { return self::getExifFromLocalPathWithSeparateProc($path, ['-G4']); } private static function getExiftool(): array { return BinExt::getExiftool(); } /** Initialize static exiftool process for local reads */ private static function initializeStaticExiftoolProc() { self::closeStaticExiftoolProc(); self::$staticProc = proc_open(array_merge(self::getExiftool(), ['-stay_open', 'true', '-@', '-']), [ 0 => ['pipe', 'r'], 1 => ['pipe', 'w'], 2 => ['pipe', 'w'], ], self::$staticPipes); stream_set_blocking(self::$staticPipes[1], false); } /** * Read from non blocking handle or throw timeout. * * @param resource $handle * @param int $timeout milliseconds * @param string $delimiter null for eof */ private static function readOrTimeout($handle, int $timeout, ?string $delimiter = null) { $buf = ''; $waitedMs = 0; while ($waitedMs < $timeout && ($delimiter ? !str_ends_with($buf, $delimiter) : !feof($handle))) { $r = stream_get_contents($handle); if (empty($r)) { ++$waitedMs; usleep(1000); continue; } $buf .= $r; } if ($waitedMs >= $timeout) { throw new \Exception('Timeout'); } return $buf; } private static function getExifFromLocalPathWithStaticProc(string &$path) { $args = implode("\n", self::EXIFTOOL_ARGS); fwrite(self::$staticPipes[0], "{$path}\n{$args}\n-execute\n"); fflush(self::$staticPipes[0]); $readyToken = "\n{ready}\n"; try { $buf = self::readOrTimeout(self::$staticPipes[1], self::EXIFTOOL_TIMEOUT, $readyToken); $tokPos = strrpos($buf, $readyToken); $buf = substr($buf, 0, $tokPos); return self::processStdout($buf); } catch (\Exception $ex) { error_log("ERROR: Exiftool may have crashed, restarting process [{$path}]"); self::restartStaticExiftoolProc(); throw new \Exception('Nothing to read from Exiftool'); } } private static function getExifFromLocalPathWithSeparateProc(string &$path, array $extraArgs = []) { $pipes = []; $proc = proc_open(array_merge(self::getExiftool(), self::EXIFTOOL_ARGS, $extraArgs, [$path]), [ 1 => ['pipe', 'w'], 2 => ['pipe', 'w'], ], $pipes); stream_set_blocking($pipes[1], false); try { $stdout = self::readOrTimeout($pipes[1], self::EXIFTOOL_TIMEOUT); return self::processStdout($stdout); } catch (\Exception $ex) { error_log("Exiftool timeout: [{$path}]"); throw new \Exception('Could not read from Exiftool'); } finally { fclose($pipes[1]); fclose($pipes[2]); proc_terminate($proc); proc_close($proc); } } /** Get json array from stdout of exiftool */ private static function processStdout(string &$stdout) { $json = json_decode($stdout, true); if (!$json) { throw new \Exception('Could not read exif data'); } return $json[0]; } }