Raphaël G. Git Repositories - youtubedl/blob - youtube_dl/postprocessor/xattrpp.py

   1 from __future__ import unicode_literals
   2
   3 from .common import PostProcessor
   4 from ..compat import compat_os_name
   5 from ..utils import (
   6     hyphenate_date,
   7     write_xattr,
   8     XAttrMetadataError,
   9     XAttrUnavailableError,
  10 )
  11
  12
  13 class XAttrMetadataPP(PostProcessor):
  14
  15     #
  16     # More info about extended attributes for media:
  17     #   http://freedesktop.org/wiki/CommonExtendedAttributes/
  18     #   http://www.freedesktop.org/wiki/PhreedomDraft/
  19     #   http://dublincore.org/documents/usageguide/elements.shtml
  20     #
  21     # TODO:
  22     #  * capture youtube keywords and put them in 'user.dublincore.subject' (comma-separated)
  23     #  * figure out which xattrs can be used for 'duration', 'thumbnail', 'resolution'
  24     #
  25
  26     def run(self, info):
  27         """ Set extended attributes on downloaded file (if xattr support is found). """
  28
  29         # Write the metadata to the file's xattrs
  30         self._downloader.to_screen('[metadata] Writing metadata to file\'s xattrs')
  31
  32         filename = info['filepath']
  33
  34         try:
  35             xattr_mapping = {
  36                 'user.xdg.referrer.url': 'webpage_url',
  37                 # 'user.xdg.comment':            'description',
  38                 'user.dublincore.title': 'title',
  39                 'user.dublincore.date': 'upload_date',
  40                 'user.dublincore.description': 'description',
  41                 'user.dublincore.contributor': 'uploader',
  42                 'user.dublincore.format': 'format',
  43             }
  44
  45             for xattrname, infoname in xattr_mapping.items():
  46
  47                 value = info.get(infoname)
  48
  49                 if value:
  50                     if infoname == 'upload_date':
  51                         value = hyphenate_date(value)
  52
  53                     byte_value = value.encode('utf-8')
  54                     write_xattr(filename, xattrname, byte_value)
  55
  56             return [], info
  57
  58         except XAttrUnavailableError as e:
  59             self._downloader.report_error(str(e))
  60             return [], info
  61
  62         except XAttrMetadataError as e:
  63             if e.reason == 'NO_SPACE':
  64                 self._downloader.report_warning(
  65                     'There\'s no disk space left or disk quota exceeded. ' +
  66                     'Extended attributes are not written.')
  67             elif e.reason == 'VALUE_TOO_LONG':
  68                 self._downloader.report_warning(
  69                     'Unable to write extended attributes due to too long values.')
  70             else:
  71                 msg = 'This filesystem doesn\'t support extended attributes. '
  72                 if compat_os_name == 'nt':
  73                     msg += 'You need to use NTFS.'
  74                 else:
  75                     msg += '(You may have to enable them in your /etc/fstab)'
  76                 self._downloader.report_error(msg)
  77             return [], info