Current File : //opt/alt/python27/lib/python2.7/site-packages/raven/utils/__init__.py
"""
raven.utils
~~~~~~~~~~~~~~~~~~~
:copyright: (c) 2010-2012 by the Sentry Team, see AUTHORS for more details.
:license: BSD, see LICENSE for more details.
"""
from __future__ import absolute_import
from raven.utils.compat import iteritems, string_types
import logging
import threading
from functools import update_wrapper
try:
import pkg_resources
except ImportError:
pkg_resources = None # NOQA
import sys
logger = logging.getLogger('raven.errors')
def merge_dicts(*dicts):
out = {}
for d in dicts:
if not d:
continue
for k, v in iteritems(d):
out[k] = v
return out
def varmap(func, var, context=None, name=None):
"""
Executes ``func(key_name, value)`` on all values
recurisively discovering dict and list scoped
values.
"""
if context is None:
context = {}
objid = id(var)
if objid in context:
return func(name, '<...>')
context[objid] = 1
if isinstance(var, dict):
ret = dict((k, varmap(func, v, context, k))
for k, v in iteritems(var))
elif isinstance(var, (list, tuple)):
ret = [varmap(func, f, context, name) for f in var]
else:
ret = func(name, var)
del context[objid]
return ret
# We store a cache of module_name->version string to avoid
# continuous imports and lookups of modules
_VERSION_CACHE = {}
def get_version_from_app(module_name, app):
version = None
# Try to pull version from pkg_resource first
# as it is able to detect version tagged with egg_info -b
if pkg_resources is not None:
# pull version from pkg_resources if distro exists
try:
return pkg_resources.get_distribution(module_name).version
except Exception:
pass
if hasattr(app, 'get_version'):
version = app.get_version
elif hasattr(app, '__version__'):
version = app.__version__
elif hasattr(app, 'VERSION'):
version = app.VERSION
elif hasattr(app, 'version'):
version = app.version
if callable(version):
version = version()
if not isinstance(version, (string_types, list, tuple)):
version = None
if version is None:
return None
if isinstance(version, (list, tuple)):
version = '.'.join(map(str, version))
return str(version)
def get_versions(module_list=None):
if not module_list:
return {}
ext_module_list = set()
for m in module_list:
parts = m.split('.')
ext_module_list.update('.'.join(parts[:idx])
for idx in range(1, len(parts) + 1))
versions = {}
for module_name in ext_module_list:
if module_name not in _VERSION_CACHE:
try:
__import__(module_name)
except ImportError:
continue
try:
app = sys.modules[module_name]
except KeyError:
continue
try:
version = get_version_from_app(module_name, app)
except Exception as e:
logger.exception(e)
version = None
_VERSION_CACHE[module_name] = version
else:
version = _VERSION_CACHE[module_name]
if version is None:
continue
versions[module_name] = version
return versions
def get_auth_header(protocol, timestamp, client, api_key,
api_secret=None, **kwargs):
header = [
('sentry_timestamp', timestamp),
('sentry_client', client),
('sentry_version', protocol),
('sentry_key', api_key),
]
if api_secret:
header.append(('sentry_secret', api_secret))
return 'Sentry %s' % ', '.join('%s=%s' % (k, v) for k, v in header)
class memoize(object):
"""
Memoize the result of a property call.
>>> class A(object):
>>> @memoize
>>> def func(self):
>>> return 'foo'
"""
def __init__(self, func):
self.__name__ = func.__name__
self.__module__ = func.__module__
self.__doc__ = func.__doc__
self.func = func
def __get__(self, obj, type=None):
if obj is None:
return self
d, n = vars(obj), self.__name__
if n not in d:
d[n] = self.func(obj)
return d[n]
def once(func):
"""Runs a thing once and once only."""
lock = threading.Lock()
def new_func(*args, **kwargs):
if new_func.called:
return
with lock:
if new_func.called:
return
rv = func(*args, **kwargs)
new_func.called = True
return rv
new_func = update_wrapper(new_func, func)
new_func.called = False
return new_func
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