File metadata: Add file metadata app

Add the file metadata app. This app uses binary wrappers called drivers to extract properties from the file of documents. The default driver uses the exiftool to extract the EXIF record from JPEG images. The exiftool can also extra some properties from other files like PDFs, office files and sound file. Signed-off-by: Roberto Rosario <Roberto.Rosario@mayan-edms.com>
2018-12-14 02:16:38 -04:00
parent 1efec6bd41
commit 0a7908baca
33 changed files with 1309 additions and 22 deletions
@@ -0,0 +1,70 @@
+from __future__ import unicode_literals
+
+import json
+import logging
+
+import sh
+
+from django.utils.translation import ugettext_lazy as _
+
+from mayan.apps.common.utils import fs_cleanup, mkstemp
+
+from ..classes import FileMetadataDriver
+from ..settings import setting_drivers_arguments
+
+logger = logging.getLogger(__name__)
+
+
+class EXIFToolDriver(FileMetadataDriver):
+    label = _('EXIF Tool')
+    internal_name = 'exiftool'
+
+    def __init__(self, *args, **kwargs):
+        try:
+            self.command_exiftool = sh.Command(
+                setting_drivers_arguments.value['exif_driver']['exiftool_path']
+            )
+        except sh.CommandNotFound:
+            self.command_exiftool = None
+        else:
+            self.command_exiftool = self.command_exiftool.bake('-j')
+
+    def _process(self, document_version):
+        new_file_object, temp_filename = mkstemp()
+
+        try:
+            document_version.save_to_file(filepath=temp_filename)
+            result = self.command_exiftool(temp_filename)
+            return json.loads(result.stdout)[0]
+        finally:
+            fs_cleanup(filename=temp_filename)
+
+
+EXIFToolDriver.register(
+    mimetypes=(
+        'application/msword',
+        'application/pdf',
+        'application/vnd.oasis.opendocument.text',
+        'application/vnd.openxmlformats-officedocument.presentationml.presentation',
+        'application/x-bittorrent',
+        'application/x-gzip',
+        'application/x-rar-compressed',
+        'application/x-shockwave-flash',
+        'application/zip',
+        'application/zip',
+        'audio/x-pn-realaudio-plugin',
+        'audio/x-wav',
+        'image/jpeg',
+        'image/png',
+        'image/svg+xml',
+        'image/tiff',
+        'image/x-portable-pixmap',
+        'text/html',
+        'text/rtf',
+        'text/x-sh',
+        'video/mp4',
+        'video/webm',
+        'video/x-flv',
+        'video/x-matroska'
+    )
+)