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66 lines
2.6 KiB
Python
66 lines
2.6 KiB
Python
import os
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from .common import PostProcessor
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from ..compat import compat_os_name
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from ..utils import (
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PostProcessingError,
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XAttrMetadataError,
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XAttrUnavailableError,
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hyphenate_date,
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write_xattr,
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)
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class XAttrMetadataPP(PostProcessor):
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"""Set extended attributes on downloaded file (if xattr support is found)
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More info about extended attributes for media:
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http://freedesktop.org/wiki/CommonExtendedAttributes/
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http://www.freedesktop.org/wiki/PhreedomDraft/
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http://dublincore.org/documents/usageguide/elements.shtml
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TODO:
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* capture youtube keywords and put them in 'user.dublincore.subject' (comma-separated)
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* figure out which xattrs can be used for 'duration', 'thumbnail', 'resolution'
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"""
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XATTR_MAPPING = {
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'user.xdg.referrer.url': 'webpage_url',
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'user.dublincore.title': 'title',
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'user.dublincore.date': 'upload_date',
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'user.dublincore.contributor': 'uploader',
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'user.dublincore.format': 'format',
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# We do this last because it may get us close to the xattr limits
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# (e.g., 4kB on ext4), and we don't want to have the other ones fail
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'user.dublincore.description': 'description',
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# 'user.xdg.comment': 'description',
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}
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def run(self, info):
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mtime = os.stat(info['filepath']).st_mtime
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self.to_screen('Writing metadata to file\'s xattrs')
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for xattrname, infoname in self.XATTR_MAPPING.items():
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try:
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value = info.get(infoname)
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if value:
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if infoname == 'upload_date':
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value = hyphenate_date(value)
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write_xattr(info['filepath'], xattrname, value.encode())
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except XAttrUnavailableError as e:
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raise PostProcessingError(str(e))
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except XAttrMetadataError as e:
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if e.reason == 'NO_SPACE':
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self.report_warning(
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'There\'s no disk space left, disk quota exceeded or filesystem xattr limit exceeded. '
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f'Extended attribute "{xattrname}" was not written.')
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elif e.reason == 'VALUE_TOO_LONG':
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self.report_warning(f'Unable to write extended attribute "{xattrname}" due to too long values.')
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else:
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tip = ('You need to use NTFS' if compat_os_name == 'nt'
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else 'You may have to enable them in your "/etc/fstab"')
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raise PostProcessingError(f'This filesystem doesn\'t support extended attributes. {tip}')
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self.try_utime(info['filepath'], mtime, mtime)
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return [], info
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