/usr/lib/python2.7/dist-packages/linkcheck/__init__.py is in linkchecker 9.3-5.
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# Copyright (C) 2000-2014 Bastian Kleineidam
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
"""
Main function module for link checking.
"""
# version checks
import sys
# Needs Python >= 2.7 because we use dictionary based logging config
# Needs Python >= 2.7.2 which fixed http://bugs.python.org/issue11467
if not (hasattr(sys, 'version_info') or
sys.version_info < (2, 7, 2, 'final', 0)):
import platform
version = platform.python_version()
raise SystemExit("This program requires Python 2.7.2 or later instead of %s" % version)
# require a reasonably recent requests module: 2.4.0 from 2014-08-29
import requests
# PEP 396 has only version strings, bummer! PEP 386 is also not helpful.
requests_version = requests.__version__.split('.')
# Depends on the version scheme of Python requests
if int(requests_version[0]) < 2 or \
(int(requests_version[0]) == 2 and int(requests_version[1]) < 4):
raise SystemExit("This program requires Python requests 2.4.0 or later instead of %s." % requests.__version__)
import os
# add the custom linkcheck_dns directory to sys.path
_dnspath = os.path.abspath(os.path.join(os.path.dirname(__file__), '..', 'linkcheck_dns'))
if _dnspath not in sys.path:
sys.path.insert(0, _dnspath)
del _dnspath
import re
import signal
import traceback
from . import i18n, log
from .logconf import (
LOG_ROOT,
LOG_CMDLINE,
LOG_CHECK,
LOG_CACHE,
LOG_GUI,
LOG_THREAD,
LOG_PLUGIN,
)
import _LinkChecker_configdata as configdata
def module_path ():
"""Return absolute directory of system executable."""
return os.path.dirname(os.path.abspath(sys.executable))
def get_install_data ():
"""Return absolute path of LinkChecker data installation directory."""
from .loader import is_frozen
if is_frozen():
return module_path()
return configdata.install_data
class LinkCheckerError (StandardError):
"""Exception to be raised on linkchecker-specific check errors."""
pass
class LinkCheckerInterrupt (StandardError):
"""Used for testing."""
pass
def get_link_pat (arg, strict=False):
"""Get a link pattern matcher for intern/extern links.
Returns a compiled pattern and a negate and strict option.
@param arg: pattern from config
@type arg: string
@param strict: if pattern is to be handled strict
@type strict: bool
@return: dictionary with keys 'pattern', 'negate' and 'strict'
@rtype: dict
@raises: re.error on invalid regular expressions
"""
log.debug(LOG_CHECK, "Link pattern %r strict=%s", arg, strict)
if arg.startswith('!'):
pattern = arg[1:]
negate = True
else:
pattern = arg
negate = False
try:
regex = re.compile(pattern)
except re.error as msg:
log.warn(LOG_CHECK, "invalid regular expression %r: %s" % (pattern, msg))
raise
return {
"pattern": regex,
"negate": negate,
"strict": strict,
}
def init_i18n (loc=None):
"""Initialize i18n with the configured locale dir. The environment
variable LOCPATH can also specify a locale dir.
@return: None
"""
if 'LOCPATH' in os.environ:
locdir = os.environ['LOCPATH']
else:
locdir = os.path.join(get_install_data(), 'share', 'locale')
i18n.init(configdata.name.lower(), locdir, loc=loc)
# install translated log level names
import logging
logging.addLevelName(logging.CRITICAL, _('CRITICAL'))
logging.addLevelName(logging.ERROR, _('ERROR'))
logging.addLevelName(logging.WARN, _('WARN'))
logging.addLevelName(logging.WARNING, _('WARNING'))
logging.addLevelName(logging.INFO, _('INFO'))
logging.addLevelName(logging.DEBUG, _('DEBUG'))
logging.addLevelName(logging.NOTSET, _('NOTSET'))
# initialize i18n, puts _() and _n() function into global namespace
init_i18n()
def drop_privileges ():
"""Make sure to drop root privileges on POSIX systems."""
if os.name != 'posix':
return
if os.geteuid() == 0:
log.warn(LOG_CHECK, _("Running as root user; "
"dropping privileges by changing user to nobody."))
import pwd
os.seteuid(pwd.getpwnam('nobody')[3])
def find_third_party_modules ():
"""Find third party modules and add them to the python path."""
parent = os.path.dirname(os.path.dirname(__file__))
third_party = os.path.join(parent, "third_party")
if os.path.isdir(third_party):
sys.path.append(os.path.join(third_party, "dnspython"))
find_third_party_modules()
if hasattr(signal, "SIGUSR1"):
# install SIGUSR1 handler
from .decorators import signal_handler
@signal_handler(signal.SIGUSR1)
def print_threadstacks(sig, frame):
"""Print stack traces of all running threads."""
log.warn(LOG_THREAD, "*** STACKTRACE START ***")
for threadId, stack in sys._current_frames().items():
log.warn(LOG_THREAD, "# ThreadID: %s" % threadId)
for filename, lineno, name, line in traceback.extract_stack(stack):
log.warn(LOG_THREAD, 'File: "%s", line %d, in %s' % (filename, lineno, name))
line = line.strip()
if line:
log.warn(LOG_THREAD, " %s" % line)
log.warn(LOG_THREAD, "*** STACKTRACE END ***")
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