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deniszh/util.py

Created Oct 3, 2014
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util.py from graphite-web 0.9.12, patched for caching bug, which cause delays in graphite graphs rendering
"""Copyright 2008 Orbitz WorldWide
Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License."""
try:
import cPickle as pickle
USING_CPICKLE = True
except:
import pickle
USING_CPICKLE = False
try:
from cStringIO import StringIO
except ImportError:
from StringIO import StringIO
from os import environ
from django.core.exceptions import ObjectDoesNotExist
from django.contrib.auth.models import User
from graphite.account.models import Profile
from graphite.logger import log
# There are a couple different json modules floating around out there with
# different APIs. Hide the ugliness here.
try:
import json
except ImportError:
import simplejson as json
if hasattr(json, 'read') and not hasattr(json, 'loads'):
json.loads = json.read
json.dumps = json.write
json.load = lambda file: json.read( file.read() )
json.dump = lambda obj, file: file.write( json.write(obj) )
def getProfile(request,allowDefault=True):
if request.user.is_authenticated():
try:
return request.user.profile
except ObjectDoesNotExist:
profile = Profile(user=request.user)
profile.save()
return profile
elif allowDefault:
return defaultProfile
def getProfileByUsername(username):
try:
user = User.objects.get(username=username)
return Profile.objects.get(user=user)
except ObjectDoesNotExist:
return None
if not environ.get('READTHEDOCS'):
try:
defaultUser = User.objects.get(username='default')
except User.DoesNotExist:
log.info("Default user does not exist, creating it...")
randomPassword = User.objects.make_random_password(length=16)
defaultUser = User.objects.create_user('default','default@localhost.localdomain',randomPassword)
defaultUser.save()
try:
defaultProfile = Profile.objects.get(user=defaultUser)
except Profile.DoesNotExist:
log.info("Default profile does not exist, creating it...")
defaultProfile = Profile(user=defaultUser)
defaultProfile.save()
# This whole song & dance is due to pickle being insecure
# The SafeUnpickler classes were largely derived from
# http://nadiana.com/python-pickle-insecure
# This code also lives in carbon.util
if USING_CPICKLE:
class SafeUnpickler(object):
PICKLE_SAFE = {
'copy_reg': set(['_reconstructor']),
'__builtin__': set(['object', 'list']),
'graphite.intervals': set(['Interval', 'IntervalSet']),
'graphite.render.datalib': set(['TimeSeries']),
'collections': set(['deque']),
}
@classmethod
def find_class(cls, module, name):
if not module in cls.PICKLE_SAFE:
raise pickle.UnpicklingError('Attempting to unpickle unsafe module %s' % module)
__import__(module)
mod = sys.modules[module]
if not name in cls.PICKLE_SAFE[module]:
raise pickle.UnpicklingError('Attempting to unpickle unsafe class %s' % name)
return getattr(mod, name)
@classmethod
def loads(cls, pickle_string):
pickle_obj = pickle.Unpickler(StringIO(pickle_string))
pickle_obj.find_global = cls.find_class
return pickle_obj.load()
else:
class SafeUnpickler(pickle.Unpickler):
PICKLE_SAFE = {
'copy_reg': set(['_reconstructor']),
'__builtin__': set(['object', 'list']),
'graphite.intervals': set(['Interval', 'IntervalSet']),
'graphite.render.datalib': set(['TimeSeries']),
'collections': set(['deque']),
}
def find_class(self, module, name):
if not module in self.PICKLE_SAFE:
raise pickle.UnpicklingError('Attempting to unpickle unsafe module %s' % module)
__import__(module)
mod = sys.modules[module]
if not name in self.PICKLE_SAFE[module]:
raise pickle.UnpicklingError('Attempting to unpickle unsafe class %s' % name)
return getattr(mod, name)
@classmethod
def loads(cls, pickle_string):
return cls(StringIO(pickle_string)).load()
unpickle = SafeUnpickler
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