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- # ***** BEGIN LICENSE BLOCK *****
- # Version: MPL 1.1/GPL 2.0/LGPL 2.1
- #
- # The contents of this file are subject to the Mozilla Public License Version
- # 1.1 (the "License"); you may not use this file except in compliance with
- # the License. You may obtain a copy of the License at
- # http://www.mozilla.org/MPL/
- #
- # Software distributed under the License is distributed on an "AS IS" basis,
- # WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- # for the specific language governing rights and limitations under the
- # License.
- #
- # The Original Code is the Python XPCOM language bindings.
- #
- # The Initial Developer of the Original Code is
- # Activestate Tool Corp.
- # Portions created by the Initial Developer are Copyright (C) 2000
- # the Initial Developer. All Rights Reserved.
- #
- # Contributor(s):
- # Mark Hammond <MarkH@activestate.com>
- #
- # Alternatively, the contents of this file may be used under the terms of
- # either the GNU General Public License Version 2 or later (the "GPL"), or
- # the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- # in which case the provisions of the GPL or the LGPL are applicable instead
- # of those above. If you wish to allow use of your version of this file only
- # under the terms of either the GPL or the LGPL, and not to allow others to
- # use your version of this file under the terms of the MPL, indicate your
- # decision by deleting the provisions above and replace them with the notice
- # and other provisions required by the GPL or the LGPL. If you do not delete
- # the provisions above, a recipient may use your version of this file under
- # the terms of any one of the MPL, the GPL or the LGPL.
- #
- # ***** END LICENSE BLOCK *****
- #
-
- # The XPCOM (Cross Platform COM) package.
- import exceptions
-
- # A global "verbose" flag - currently used by the
- # server package to print trace messages
- verbose = 0
- # Map of nsresult -> constant_name.
- hr_map = {}
-
- # The standard XPCOM exception object.
- # Instances of this class are raised by the XPCOM extension module.
- class Exception(exceptions.Exception):
- def __init__(self, errno, message = None):
- assert int(errno) == errno, "The errno param must be an integer"
- self.errno = errno
- self.message = message
- exceptions.Exception.__init__(self, errno)
- def __str__(self):
- if not hr_map:
- import nsError
- for name, val in nsError.__dict__.items():
- if type(val)==type(0):
- hr_map[val] = name
- message = self.message
- if message is None:
- message = hr_map.get(self.errno)
- if message is None:
- message = ""
- return "%d (%s)" % (self.errno, message)
-
- # An alias for Exception - allows code to say "from xpcom import COMException"
- # rather than "Exception", preventing clashes with the builtin Exception
- COMException = Exception
-
- # Exceptions thrown by servers. It can be good for diagnostics to
- # differentiate between a ServerException (which was presumably explicitly thrown)
- # and a normal exception which may simply be propagating down.
- # (When ServerException objects are thrown across the XPConnect
- # gateway they will be converted back to normal client exceptions if
- # subsequently re-caught by Python)
- class ServerException(Exception):
- def __init__(self, errno=None, *args, **kw):
- if errno is None:
- import nsError
- errno = nsError.NS_ERROR_FAILURE
- Exception.__init__(self, errno, *args, **kw)
-
- # Logging support - setup the 'xpcom' logger to write to the Mozilla
- # console service, and also to sys.stderr, or optionally a file.
- # Environment variables supports:
- # PYXPCOM_LOG_FILE=filename - if set, used instead of sys.stderr.
- # PYXPCOM_LOG_LEVEL=level - level may be a number or a logging level
- # constant (eg, 'debug', 'error')
- # Later it may make sense to allow a different log level to be set for
- # the file than for the console service.
- import logging
- class ConsoleServiceStream:
- # enough of a stream to keep logging happy
- def flush(self):
- pass
- def write(self, msg):
- import _xpcom
- _xpcom.LogConsoleMessage(msg)
- def close(self):
- pass
-
- def setupLogging():
- import sys, os, threading, thread
- hdlr = logging.StreamHandler(ConsoleServiceStream())
- fmt = logging.Formatter(logging.BASIC_FORMAT)
- hdlr.setFormatter(fmt)
- # There is a bug in 2.3 and 2.4.x logging module in that it doesn't
- # use an RLock, leading to deadlocks in some cases (specifically,
- # logger.warning("ob is %r", ob), and where repr(ob) itself tries to log)
- # Later versions of logging use an RLock, so we detect an "old" style
- # handler and update its lock
- if type(hdlr.lock) == thread.LockType:
- hdlr.lock = threading.RLock()
-
- logger.addHandler(hdlr)
- # The console handler in mozilla does not go to the console!?
- # Add a handler to print to stderr, or optionally a file
- # PYXPCOM_LOG_FILE can specify a filename
- filename = os.environ.get("PYXPCOM_LOG_FILE")
- stream = sys.stderr # this is what logging uses as default
- if filename:
- try:
- # open without buffering so never pending output
- stream = open(filename, "wU", 0)
- except IOError, why:
- print >> sys.stderr, "pyxpcom failed to open log file '%s': %s" \
- % (filename, why)
- # stream remains default
-
- hdlr = logging.StreamHandler(stream)
- # see above - fix a deadlock problem on this handler too.
- if type(hdlr.lock) == thread.LockType:
- hdlr.lock = threading.RLock()
-
- fmt = logging.Formatter(logging.BASIC_FORMAT)
- hdlr.setFormatter(fmt)
- logger.addHandler(hdlr)
- # Allow PYXPCOM_LOG_LEVEL to set the level
- level = os.environ.get("PYXPCOM_LOG_LEVEL")
- if level:
- try:
- level = int(level)
- except ValueError:
- try:
- # might be a symbolic name - all are upper-case
- level = int(getattr(logging, level.upper()))
- except (AttributeError, ValueError):
- logger.warning("The PYXPCOM_LOG_LEVEL variable specifies an "
- "invalid level")
- level = None
- if level:
- logger.setLevel(level)
-
- logger = logging.getLogger('xpcom')
- # If someone else has already setup this logger, leave things alone.
- if len(logger.handlers) == 0:
- setupLogging()
-
- # Cleanup namespace - but leave 'logger' there for people to use, so they
- # don't need to know the exact name of the logger.
- del ConsoleServiceStream, logging, setupLogging
-