from __future__ import unicode_literals import os import subprocess import sys import errno from .common import PostProcessor from ..utils import ( check_executable, hyphenate_date, version_tuple, PostProcessingError, encodeArgument, encodeFilename, ) class XAttrMetadataError(PostProcessingError): def __init__(self, code=None, msg='Unknown error'): super(XAttrMetadataError, self).__init__(msg) self.code = code # Parsing code and msg if (self.code in (errno.ENOSPC, errno.EDQUOT) or 'No space left' in self.msg or 'Disk quota excedded' in self.msg): self.reason = 'NO_SPACE' elif self.code == errno.E2BIG or 'Argument list too long' in self.msg: self.reason = 'VALUE_TOO_LONG' else: self.reason = 'NOT_SUPPORTED' class XAttrMetadataPP(PostProcessor): # # More info about extended attributes for media: # http://freedesktop.org/wiki/CommonExtendedAttributes/ # http://www.freedesktop.org/wiki/PhreedomDraft/ # http://dublincore.org/documents/usageguide/elements.shtml # # TODO: # * capture youtube keywords and put them in 'user.dublincore.subject' (comma-separated) # * figure out which xattrs can be used for 'duration', 'thumbnail', 'resolution' # def run(self, info): """ Set extended attributes on downloaded file (if xattr support is found). """ # This mess below finds the best xattr tool for the job and creates a # "write_xattr" function. try: # try the pyxattr module... import xattr # Unicode arguments are not supported in python-pyxattr until # version 0.5.0 # See https://github.com/rg3/youtube-dl/issues/5498 pyxattr_required_version = '0.5.0' if version_tuple(xattr.__version__) < version_tuple(pyxattr_required_version): self._downloader.report_warning( 'python-pyxattr is detected but is too old. ' 'youtube-dl requires %s or above while your version is %s. ' 'Falling back to other xattr implementations' % ( pyxattr_required_version, xattr.__version__)) raise ImportError def write_xattr(path, key, value): try: xattr.set(path, key, value) except EnvironmentError as e: raise XAttrMetadataError(e.errno, e.strerror) except ImportError: if os.name == 'nt': # Write xattrs to NTFS Alternate Data Streams: # http://en.wikipedia.org/wiki/NTFS#Alternate_data_streams_.28ADS.29 def write_xattr(path, key, value): assert ':' not in key assert os.path.exists(path) ads_fn = path + ":" + key try: with open(ads_fn, "wb") as f: f.write(value) except EnvironmentError as e: raise XAttrMetadataError(e.errno, e.strerror) else: user_has_setfattr = check_executable("setfattr", ['--version']) user_has_xattr = check_executable("xattr", ['-h']) if user_has_setfattr or user_has_xattr: def write_xattr(path, key, value): value = value.decode('utf-8') if user_has_setfattr: executable = 'setfattr' opts = ['-n', key, '-v', value] elif user_has_xattr: executable = 'xattr' opts = ['-w', key, value] cmd = ([encodeFilename(executable, True)] + [encodeArgument(o) for o in opts] + [encodeFilename(path, True)]) try: p = subprocess.Popen( cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE) except EnvironmentError as e: raise XAttrMetadataError(e.errno, e.strerror) stdout, stderr = p.communicate() stderr = stderr.decode('utf-8', 'replace') if p.returncode != 0: raise XAttrMetadataError(p.returncode, stderr) else: # On Unix, and can't find pyxattr, setfattr, or xattr. if sys.platform.startswith('linux'): self._downloader.report_error( "Couldn't find a tool to set the xattrs. " "Install either the python 'pyxattr' or 'xattr' " "modules, or the GNU 'attr' package " "(which contains the 'setfattr' tool).") else: self._downloader.report_error( "Couldn't find a tool to set the xattrs. " "Install either the python 'xattr' module, " "or the 'xattr' binary.") # Write the metadata to the file's xattrs self._downloader.to_screen('[metadata] Writing metadata to file\'s xattrs') filename = info['filepath'] try: xattr_mapping = { 'user.xdg.referrer.url': 'webpage_url', # 'user.xdg.comment': 'description', 'user.dublincore.title': 'title', 'user.dublincore.date': 'upload_date', 'user.dublincore.description': 'description', 'user.dublincore.contributor': 'uploader', 'user.dublincore.format': 'format', } for xattrname, infoname in xattr_mapping.items(): value = info.get(infoname) if value: if infoname == "upload_date": value = hyphenate_date(value) byte_value = value.encode('utf-8') write_xattr(filename, xattrname, byte_value) return [], info except XAttrMetadataError as e: if e.reason == 'NO_SPACE': self._downloader.report_warning( 'There\'s no disk space left or disk quota exceeded. ' + 'Extended attributes are not written.') elif e.reason == 'VALUE_TOO_LONG': self._downloader.report_warning( 'Unable to write extended attributes due to too long values.') else: self._downloader.report_error( 'This filesystem doesn\'t support extended attributes. ' + '(You may have to enable them in your /etc/fstab)') return [], info