Log to an external logger (fixes #1810)

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.
pull/8/head
Itay Brandes 11 years ago
parent a87b0615aa
commit 43afe28588

@ -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())

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