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[xattr] Rework

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In particular, explicitly require NT before trying ADS, and do not try to parse process output that may be localized.
This commit is contained in:
Philipp Hagemeister 2014-01-07 06:34:55 +01:00
parent d70ad093af
commit 168da92b9a
1 changed files with 18 additions and 40 deletions
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58
youtube_dl/postprocessor/xattrpp.py
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@ -4,6 +4,7 @@ import sys
from .common import PostProcessor from .common import PostProcessor
from ..utils import ( from ..utils import (
check_executable,
hyphenate_date, hyphenate_date,
preferredencoding, preferredencoding,
) )
@ -30,48 +31,35 @@ class XAttrMetadataPP(PostProcessor):
try: try:
# try the pyxattr module... # try the pyxattr module...
import xattr import xattr
def write_xattr(path, key, value): def write_xattr(path, key, value):
return xattr.setxattr(path, key, value) return xattr.setxattr(path, key, value)
except ImportError: 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(key.find(":") < 0)
assert(path.find(":") < 0)
assert(os.path.exists(path))
if os.name == 'posix': ads_fn = path + ":" + key
def which(bin): with open(ads_fn, "w") as f:
for dir in os.environ["PATH"].split(":"): f.write(value)
path = os.path.join(dir, bin) else:
if os.path.exists(path): user_has_setfattr = check_executable("setfattr", ['--version'])
return path user_has_xattr = check_executable("xattr", ['-h'])
user_has_setfattr = which("setfattr")
user_has_xattr = which("xattr")
if user_has_setfattr or user_has_xattr: if user_has_setfattr or user_has_xattr:
def write_xattr(path, key, value): def write_xattr(path, key, value):
import errno
potential_errors = {
# setfattr: /tmp/blah: Operation not supported
"Operation not supported": errno.EOPNOTSUPP,
# setfattr: ~/blah: No such file or directory
# xattr: No such file: ~/blah
"No such file": errno.ENOENT,
}
if user_has_setfattr: if user_has_setfattr:
cmd = ['setfattr', '-n', key, '-v', value, path] cmd = ['setfattr', '-n', key, '-v', value, path]
elif user_has_xattr: elif user_has_xattr:
cmd = ['xattr', '-w', key, value, path] cmd = ['xattr', '-w', key, value, path]
try: subprocess.check_output(cmd)
subprocess.check_output(cmd, stderr=subprocess.STDOUT)
except subprocess.CalledProcessError as e:
errorstr = e.output.strip().decode()
for potential_errorstr, potential_errno in potential_errors.items():
if errorstr.find(potential_errorstr) > -1:
e = OSError(potential_errno, potential_errorstr)
e.__cause__ = None
raise e
raise # Reraise unhandled error
else: else:
# On Unix, and can't find pyxattr, setfattr, or xattr. # On Unix, and can't find pyxattr, setfattr, or xattr.
@ -86,19 +74,9 @@ class XAttrMetadataPP(PostProcessor):
"Couldn't find a tool to set the xattrs. " "Couldn't find a tool to set the xattrs. "
"Install either the python 'xattr' module, " "Install either the python 'xattr' module, "
"or the 'xattr' binary.") "or the 'xattr' binary.")
else:
# 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(key.find(":") < 0)
assert(path.find(":") < 0)
assert(os.path.exists(path))
ads_fn = path + ":" + key
with open(ads_fn, "w") as f:
f.write(value)
# Write the metadata to the file's xattrs # Write the metadata to the file's xattrs
self._downloader.to_screen('[metadata] Writing metadata to file\'s xattrs...') self._downloader.to_screen('[metadata] Writing metadata to file\'s xattrs')
filename = info['filepath'] filename = info['filepath']
@ -126,7 +104,7 @@ class XAttrMetadataPP(PostProcessor):
return True, info return True, info
except OSError: except (subprocess.CalledProcessError, OSError):
self._downloader.report_error("This filesystem doesn't support extended attributes. (You may have to enable them in your /etc/fstab)") self._downloader.report_error("This filesystem doesn't support extended attributes. (You may have to enable them in your /etc/fstab)")
return False, info return False, info