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Log to an external logger (fixes #1810)

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Sadly applications using youtube-dl's python sources can't directly
access it's log stream. It's pretty much limited to stdout and stderr
only.

It should log to logging.Logger instance passed to YoutubeDL's params
dictionary.
This commit is contained in:
Itay Brandes 2013-11-23 10:22:18 +02:00
parent a87b0615aa
commit 43afe28588
1 changed files with 11 additions and 5 deletions
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8
youtube_dl/YoutubeDL.py
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@ -97,6 +97,7 @@ class YoutubeDL(object):
playlistend: Playlist item to end at. playlistend: Playlist item to end at.
matchtitle: Download only matching titles. matchtitle: Download only matching titles.
rejecttitle: Reject downloads for matching titles. rejecttitle: Reject downloads for matching titles.
logger: Log messages to a logging.Logger instance.
logtostderr: Log messages to stderr instead of stdout. logtostderr: Log messages to stderr instead of stdout.
writedescription: Write the video description to a .description file writedescription: Write the video description to a .description file
writeinfojson: Write the video description to a .info.json file writeinfojson: Write the video description to a .info.json file
@ -192,7 +193,9 @@ class YoutubeDL(object):
def to_screen(self, message, skip_eol=False): def to_screen(self, message, skip_eol=False):
"""Print message to stdout if not in quiet mode.""" """Print message to stdout if not in quiet mode."""
if not self.params.get('quiet', False): if self.params.get('logger', False):
self.params['logger'].debug(message)
elif not self.params.get('quiet', False):
terminator = [u'\n', u''][skip_eol] terminator = [u'\n', u''][skip_eol]
output = message + terminator output = message + terminator
write_string(output, self._screen_file) write_string(output, self._screen_file)
@ -200,6 +203,9 @@ class YoutubeDL(object):
def to_stderr(self, message): def to_stderr(self, message):
"""Print message to stderr.""" """Print message to stderr."""
assert type(message) == type(u'') assert type(message) == type(u'')
if self.params.get('logger', False):
self.params['logger'].error(message)
else:
output = message + u'\n' output = message + u'\n'
if 'b' in getattr(self._screen_file, 'mode', '') or sys.version_info[0] < 3: # Python 2 lies about the mode of sys.stdout/sys.stderr if 'b' in getattr(self._screen_file, 'mode', '') or sys.version_info[0] < 3: # Python 2 lies about the mode of sys.stdout/sys.stderr
output = output.encode(preferredencoding()) output = output.encode(preferredencoding())