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Move write_xattr to utils.py

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There are some other places that use xattr functions. It's better to
move it to a common place so that others can use it.
pull/8/head
Yen Chi Hsuan 8 years ago
parent 475f8a4580
commit efa97bdcf1
No known key found for this signature in database
GPG Key ID: 3FDDD575826C5C30
2 changed files with 106 additions and 107 deletions
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114
youtube_dl/postprocessor/xattrpp.py
Unescape Escape View File

@ -1,37 +1,15 @@
from __future__ import unicode_literals
import os
import subprocess
import sys
import errno
from .common import PostProcessor
from ..compat import compat_os_name
from ..utils import (
check_executable,
hyphenate_date,
version_tuple,
PostProcessingError,
encodeArgument,
encodeFilename,
write_xattr,
XAttrMetadataError,
XAttrUnavailableError,
)
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):
#
@ -48,88 +26,6 @@ class XAttrMetadataPP(PostProcessor):
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 compat_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')
@ -159,6 +55,10 @@ class XAttrMetadataPP(PostProcessor):
return [], info
except XAttrUnavailableError as e:
self._downloader.report_error(str(e))
return [], info
except XAttrMetadataError as e:
if e.reason == 'NO_SPACE':
self._downloader.report_warning(

99
youtube_dl/utils.py
Unescape Escape View File

@ -42,6 +42,7 @@ from .compat import (
compat_html_entities_html5,
compat_http_client,
compat_kwargs,
compat_os_name,
compat_parse_qs,
compat_shlex_quote,
compat_socket_create_connection,
@ -775,6 +776,25 @@ class ContentTooShortError(Exception):
self.expected = expected
class XAttrMetadataError(Exception):
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 XAttrUnavailableError(Exception):
pass
def _create_http_connection(ydl_handler, http_class, is_https, *args, **kwargs):
# Working around python 2 bug (see http://bugs.python.org/issue17849) by limiting
# expected HTTP responses to meet HTTP/1.0 or later (see also
@ -3131,3 +3151,82 @@ def decode_png(png_data):
current_row.append(color)
return width, height, pixels
def write_xattr(path, key, value):
# This mess below finds the best xattr tool for the job
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):
# TODO: fallback to CLI tools
raise XAttrUnavailableError(
'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__))
try:
xattr.set(path, key, value)
except EnvironmentError as e:
raise XAttrMetadataError(e.errno, e.strerror)
except ImportError:
if compat_os_name == 'nt':
# Write xattrs to NTFS Alternate Data Streams:
# http://en.wikipedia.org/wiki/NTFS#Alternate_data_streams_.28ADS.29
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:
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'):
raise XAttrUnavailableError(
"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:
raise XAttrUnavailableError(
"Couldn't find a tool to set the xattrs. "
"Install either the python 'xattr' module, "
"or the 'xattr' binary.")

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