mirror of
https://github.com/morpheus65535/bazarr
synced 2024-12-26 09:37:25 +00:00
507 lines
17 KiB
Python
507 lines
17 KiB
Python
"""Beaker utilities"""
|
|
import hashlib
|
|
import socket
|
|
|
|
import binascii
|
|
|
|
from ._compat import PY2, string_type, unicode_text, NoneType, dictkeyslist, im_class, im_func, pickle, func_signature, \
|
|
default_im_func
|
|
|
|
try:
|
|
import threading as _threading
|
|
except ImportError:
|
|
import dummy_threading as _threading
|
|
|
|
from datetime import datetime, timedelta
|
|
import os
|
|
import re
|
|
import string
|
|
import types
|
|
import weakref
|
|
import warnings
|
|
import sys
|
|
import inspect
|
|
import json
|
|
import zlib
|
|
|
|
from beaker.converters import asbool
|
|
from beaker import exceptions
|
|
from threading import local as _tlocal
|
|
|
|
DEFAULT_CACHE_KEY_LENGTH = 250
|
|
|
|
__all__ = ["ThreadLocal", "WeakValuedRegistry", "SyncDict", "encoded_path",
|
|
"verify_directory",
|
|
"serialize", "deserialize"]
|
|
|
|
|
|
def function_named(fn, name):
|
|
"""Return a function with a given __name__.
|
|
|
|
Will assign to __name__ and return the original function if possible on
|
|
the Python implementation, otherwise a new function will be constructed.
|
|
|
|
"""
|
|
fn.__name__ = name
|
|
return fn
|
|
|
|
|
|
def skip_if(predicate, reason=None):
|
|
"""Skip a test if predicate is true."""
|
|
reason = reason or predicate.__name__
|
|
|
|
from nose import SkipTest
|
|
|
|
def decorate(fn):
|
|
fn_name = fn.__name__
|
|
|
|
def maybe(*args, **kw):
|
|
if predicate():
|
|
msg = "'%s' skipped: %s" % (
|
|
fn_name, reason)
|
|
raise SkipTest(msg)
|
|
else:
|
|
return fn(*args, **kw)
|
|
return function_named(maybe, fn_name)
|
|
return decorate
|
|
|
|
|
|
def assert_raises(except_cls, callable_, *args, **kw):
|
|
"""Assert the given exception is raised by the given function + arguments."""
|
|
|
|
try:
|
|
callable_(*args, **kw)
|
|
success = False
|
|
except except_cls:
|
|
success = True
|
|
|
|
# assert outside the block so it works for AssertionError too !
|
|
assert success, "Callable did not raise an exception"
|
|
|
|
|
|
def verify_directory(dir):
|
|
"""verifies and creates a directory. tries to
|
|
ignore collisions with other threads and processes."""
|
|
|
|
tries = 0
|
|
while not os.access(dir, os.F_OK):
|
|
try:
|
|
tries += 1
|
|
os.makedirs(dir)
|
|
except:
|
|
if tries > 5:
|
|
raise
|
|
|
|
|
|
def has_self_arg(func):
|
|
"""Return True if the given function has a 'self' argument."""
|
|
args = list(func_signature(func).parameters)
|
|
if args and args[0] in ('self', 'cls'):
|
|
return True
|
|
else:
|
|
return False
|
|
|
|
|
|
def warn(msg, stacklevel=3):
|
|
"""Issue a warning."""
|
|
if isinstance(msg, string_type):
|
|
warnings.warn(msg, exceptions.BeakerWarning, stacklevel=stacklevel)
|
|
else:
|
|
warnings.warn(msg, stacklevel=stacklevel)
|
|
|
|
|
|
def deprecated(message):
|
|
def wrapper(fn):
|
|
def deprecated_method(*args, **kargs):
|
|
warnings.warn(message, DeprecationWarning, 2)
|
|
return fn(*args, **kargs)
|
|
# TODO: use decorator ? functools.wrapper ?
|
|
deprecated_method.__name__ = fn.__name__
|
|
deprecated_method.__doc__ = "%s\n\n%s" % (message, fn.__doc__)
|
|
return deprecated_method
|
|
return wrapper
|
|
|
|
|
|
class ThreadLocal(object):
|
|
"""stores a value on a per-thread basis"""
|
|
|
|
__slots__ = '_tlocal'
|
|
|
|
def __init__(self):
|
|
self._tlocal = _tlocal()
|
|
|
|
def put(self, value):
|
|
self._tlocal.value = value
|
|
|
|
def has(self):
|
|
return hasattr(self._tlocal, 'value')
|
|
|
|
def get(self, default=None):
|
|
return getattr(self._tlocal, 'value', default)
|
|
|
|
def remove(self):
|
|
del self._tlocal.value
|
|
|
|
|
|
class SyncDict(object):
|
|
"""
|
|
An efficient/threadsafe singleton map algorithm, a.k.a.
|
|
"get a value based on this key, and create if not found or not
|
|
valid" paradigm:
|
|
|
|
exists && isvalid ? get : create
|
|
|
|
Designed to work with weakref dictionaries to expect items
|
|
to asynchronously disappear from the dictionary.
|
|
|
|
Use python 2.3.3 or greater ! a major bug was just fixed in Nov.
|
|
2003 that was driving me nuts with garbage collection/weakrefs in
|
|
this section.
|
|
|
|
"""
|
|
def __init__(self):
|
|
self.mutex = _threading.Lock()
|
|
self.dict = {}
|
|
|
|
def get(self, key, createfunc, *args, **kwargs):
|
|
try:
|
|
if key in self.dict:
|
|
return self.dict[key]
|
|
else:
|
|
return self.sync_get(key, createfunc, *args, **kwargs)
|
|
except KeyError:
|
|
return self.sync_get(key, createfunc, *args, **kwargs)
|
|
|
|
def sync_get(self, key, createfunc, *args, **kwargs):
|
|
self.mutex.acquire()
|
|
try:
|
|
try:
|
|
if key in self.dict:
|
|
return self.dict[key]
|
|
else:
|
|
return self._create(key, createfunc, *args, **kwargs)
|
|
except KeyError:
|
|
return self._create(key, createfunc, *args, **kwargs)
|
|
finally:
|
|
self.mutex.release()
|
|
|
|
def _create(self, key, createfunc, *args, **kwargs):
|
|
self[key] = obj = createfunc(*args, **kwargs)
|
|
return obj
|
|
|
|
def has_key(self, key):
|
|
return key in self.dict
|
|
|
|
def __contains__(self, key):
|
|
return self.dict.__contains__(key)
|
|
|
|
def __getitem__(self, key):
|
|
return self.dict.__getitem__(key)
|
|
|
|
def __setitem__(self, key, value):
|
|
self.dict.__setitem__(key, value)
|
|
|
|
def __delitem__(self, key):
|
|
return self.dict.__delitem__(key)
|
|
|
|
def clear(self):
|
|
self.dict.clear()
|
|
|
|
|
|
class WeakValuedRegistry(SyncDict):
|
|
def __init__(self):
|
|
self.mutex = _threading.RLock()
|
|
self.dict = weakref.WeakValueDictionary()
|
|
|
|
sha1 = None
|
|
|
|
|
|
def encoded_path(root, identifiers, extension=".enc", depth=3,
|
|
digest_filenames=True):
|
|
|
|
"""Generate a unique file-accessible path from the given list of
|
|
identifiers starting at the given root directory."""
|
|
ident = "_".join(identifiers)
|
|
|
|
global sha1
|
|
if sha1 is None:
|
|
from beaker.crypto import sha1
|
|
|
|
if digest_filenames:
|
|
if isinstance(ident, unicode_text):
|
|
ident = sha1(ident.encode('utf-8')).hexdigest()
|
|
else:
|
|
ident = sha1(ident).hexdigest()
|
|
|
|
ident = os.path.basename(ident)
|
|
|
|
tokens = []
|
|
for d in range(1, depth):
|
|
tokens.append(ident[0:d])
|
|
|
|
dir = os.path.join(root, *tokens)
|
|
verify_directory(dir)
|
|
|
|
return os.path.join(dir, ident + extension)
|
|
|
|
|
|
def asint(obj):
|
|
if isinstance(obj, int):
|
|
return obj
|
|
elif isinstance(obj, string_type) and re.match(r'^\d+$', obj):
|
|
return int(obj)
|
|
else:
|
|
raise Exception("This is not a proper int")
|
|
|
|
|
|
def verify_options(opt, types, error):
|
|
if not isinstance(opt, types):
|
|
if not isinstance(types, tuple):
|
|
types = (types,)
|
|
coerced = False
|
|
for typ in types:
|
|
try:
|
|
if typ in (list, tuple):
|
|
opt = [x.strip() for x in opt.split(',')]
|
|
else:
|
|
if typ == bool:
|
|
typ = asbool
|
|
elif typ == int:
|
|
typ = asint
|
|
elif typ in (timedelta, datetime):
|
|
if not isinstance(opt, typ):
|
|
raise Exception("%s requires a timedelta type", typ)
|
|
opt = typ(opt)
|
|
coerced = True
|
|
except:
|
|
pass
|
|
if coerced:
|
|
break
|
|
if not coerced:
|
|
raise Exception(error)
|
|
elif isinstance(opt, str) and not opt.strip():
|
|
raise Exception("Empty strings are invalid for: %s" % error)
|
|
return opt
|
|
|
|
|
|
def verify_rules(params, ruleset):
|
|
for key, types, message in ruleset:
|
|
if key in params:
|
|
params[key] = verify_options(params[key], types, message)
|
|
return params
|
|
|
|
|
|
def coerce_session_params(params):
|
|
rules = [
|
|
('data_dir', (str, NoneType), "data_dir must be a string referring to a directory."),
|
|
('lock_dir', (str, NoneType), "lock_dir must be a string referring to a directory."),
|
|
('type', (str, NoneType), "Session type must be a string."),
|
|
('cookie_expires', (bool, datetime, timedelta, int),
|
|
"Cookie expires was not a boolean, datetime, int, or timedelta instance."),
|
|
('cookie_domain', (str, NoneType), "Cookie domain must be a string."),
|
|
('cookie_path', (str, NoneType), "Cookie path must be a string."),
|
|
('id', (str,), "Session id must be a string."),
|
|
('key', (str,), "Session key must be a string."),
|
|
('secret', (str, NoneType), "Session secret must be a string."),
|
|
('validate_key', (str, NoneType), "Session encrypt_key must be a string."),
|
|
('encrypt_key', (str, NoneType), "Session validate_key must be a string."),
|
|
('encrypt_nonce_bits', (int, NoneType), "Session encrypt_nonce_bits must be a number"),
|
|
('secure', (bool, NoneType), "Session secure must be a boolean."),
|
|
('httponly', (bool, NoneType), "Session httponly must be a boolean."),
|
|
('timeout', (int, NoneType), "Session timeout must be an integer."),
|
|
('save_accessed_time', (bool, NoneType),
|
|
"Session save_accessed_time must be a boolean (defaults to true)."),
|
|
('auto', (bool, NoneType), "Session is created if accessed."),
|
|
('webtest_varname', (str, NoneType), "Session varname must be a string."),
|
|
('data_serializer', (str,), "data_serializer must be a string.")
|
|
]
|
|
opts = verify_rules(params, rules)
|
|
cookie_expires = opts.get('cookie_expires')
|
|
if cookie_expires and isinstance(cookie_expires, int) and \
|
|
not isinstance(cookie_expires, bool):
|
|
opts['cookie_expires'] = timedelta(seconds=cookie_expires)
|
|
|
|
if opts.get('timeout') is not None and not opts.get('save_accessed_time', True):
|
|
raise Exception("save_accessed_time must be true to use timeout")
|
|
|
|
return opts
|
|
|
|
|
|
def coerce_cache_params(params):
|
|
rules = [
|
|
('data_dir', (str, NoneType), "data_dir must be a string referring to a directory."),
|
|
('lock_dir', (str, NoneType), "lock_dir must be a string referring to a directory."),
|
|
('type', (str,), "Cache type must be a string."),
|
|
('enabled', (bool, NoneType), "enabled must be true/false if present."),
|
|
('expire', (int, NoneType),
|
|
"expire must be an integer representing how many seconds the cache is valid for"),
|
|
('regions', (list, tuple, NoneType),
|
|
"Regions must be a comma separated list of valid regions"),
|
|
('key_length', (int, NoneType),
|
|
"key_length must be an integer which indicates the longest a key can be before hashing"),
|
|
]
|
|
return verify_rules(params, rules)
|
|
|
|
|
|
def coerce_memcached_behaviors(behaviors):
|
|
rules = [
|
|
('cas', (bool, int), 'cas must be a boolean or an integer'),
|
|
('no_block', (bool, int), 'no_block must be a boolean or an integer'),
|
|
('receive_timeout', (int,), 'receive_timeout must be an integer'),
|
|
('send_timeout', (int,), 'send_timeout must be an integer'),
|
|
('ketama_hash', (str,),
|
|
'ketama_hash must be a string designating a valid hashing strategy option'),
|
|
('_poll_timeout', (int,), '_poll_timeout must be an integer'),
|
|
('auto_eject', (bool, int), 'auto_eject must be an integer'),
|
|
('retry_timeout', (int,), 'retry_timeout must be an integer'),
|
|
('_sort_hosts', (bool, int), '_sort_hosts must be an integer'),
|
|
('_io_msg_watermark', (int,), '_io_msg_watermark must be an integer'),
|
|
('ketama', (bool, int), 'ketama must be a boolean or an integer'),
|
|
('ketama_weighted', (bool, int), 'ketama_weighted must be a boolean or an integer'),
|
|
('_io_key_prefetch', (int, bool), '_io_key_prefetch must be a boolean or an integer'),
|
|
('_hash_with_prefix_key', (bool, int),
|
|
'_hash_with_prefix_key must be a boolean or an integer'),
|
|
('tcp_nodelay', (bool, int), 'tcp_nodelay must be a boolean or an integer'),
|
|
('failure_limit', (int,), 'failure_limit must be an integer'),
|
|
('buffer_requests', (bool, int), 'buffer_requests must be a boolean or an integer'),
|
|
('_socket_send_size', (int,), '_socket_send_size must be an integer'),
|
|
('num_replicas', (int,), 'num_replicas must be an integer'),
|
|
('remove_failed', (int,), 'remove_failed must be an integer'),
|
|
('_noreply', (bool, int), '_noreply must be a boolean or an integer'),
|
|
('_io_bytes_watermark', (int,), '_io_bytes_watermark must be an integer'),
|
|
('_socket_recv_size', (int,), '_socket_recv_size must be an integer'),
|
|
('distribution', (str,),
|
|
'distribution must be a string designating a valid distribution option'),
|
|
('connect_timeout', (int,), 'connect_timeout must be an integer'),
|
|
('hash', (str,), 'hash must be a string designating a valid hashing option'),
|
|
('verify_keys', (bool, int), 'verify_keys must be a boolean or an integer'),
|
|
('dead_timeout', (int,), 'dead_timeout must be an integer')
|
|
]
|
|
return verify_rules(behaviors, rules)
|
|
|
|
|
|
def parse_cache_config_options(config, include_defaults=True):
|
|
"""Parse configuration options and validate for use with the
|
|
CacheManager"""
|
|
|
|
# Load default cache options
|
|
if include_defaults:
|
|
options = dict(type='memory', data_dir=None, expire=None,
|
|
log_file=None)
|
|
else:
|
|
options = {}
|
|
for key, val in config.items():
|
|
if key.startswith('beaker.cache.'):
|
|
options[key[13:]] = val
|
|
if key.startswith('cache.'):
|
|
options[key[6:]] = val
|
|
coerce_cache_params(options)
|
|
|
|
# Set cache to enabled if not turned off
|
|
if 'enabled' not in options and include_defaults:
|
|
options['enabled'] = True
|
|
|
|
# Configure region dict if regions are available
|
|
regions = options.pop('regions', None)
|
|
if regions:
|
|
region_configs = {}
|
|
for region in regions:
|
|
if not region: # ensure region name is valid
|
|
continue
|
|
# Setup the default cache options
|
|
region_options = dict(data_dir=options.get('data_dir'),
|
|
lock_dir=options.get('lock_dir'),
|
|
type=options.get('type'),
|
|
enabled=options['enabled'],
|
|
expire=options.get('expire'),
|
|
key_length=options.get('key_length', DEFAULT_CACHE_KEY_LENGTH))
|
|
region_prefix = '%s.' % region
|
|
region_len = len(region_prefix)
|
|
for key in dictkeyslist(options):
|
|
if key.startswith(region_prefix):
|
|
region_options[key[region_len:]] = options.pop(key)
|
|
coerce_cache_params(region_options)
|
|
region_configs[region] = region_options
|
|
options['cache_regions'] = region_configs
|
|
return options
|
|
|
|
|
|
def parse_memcached_behaviors(config):
|
|
"""Parse behavior options and validate for use with pylibmc
|
|
client/PylibMCNamespaceManager, or potentially other memcached
|
|
NamespaceManagers that support behaviors"""
|
|
behaviors = {}
|
|
|
|
for key, val in config.items():
|
|
if key.startswith('behavior.'):
|
|
behaviors[key[9:]] = val
|
|
|
|
coerce_memcached_behaviors(behaviors)
|
|
return behaviors
|
|
|
|
|
|
def func_namespace(func):
|
|
"""Generates a unique namespace for a function"""
|
|
kls = None
|
|
if hasattr(func, 'im_func') or hasattr(func, '__func__'):
|
|
kls = im_class(func)
|
|
func = im_func(func)
|
|
|
|
if kls:
|
|
return '%s.%s' % (kls.__module__, kls.__name__)
|
|
else:
|
|
return '%s|%s' % (inspect.getsourcefile(func), func.__name__)
|
|
|
|
|
|
class PickleSerializer(object):
|
|
def loads(self, data_string):
|
|
return pickle.loads(data_string)
|
|
|
|
def dumps(self, data):
|
|
return pickle.dumps(data, 2)
|
|
|
|
|
|
class JsonSerializer(object):
|
|
def loads(self, data_string):
|
|
return json.loads(zlib.decompress(data_string).decode('utf-8'))
|
|
|
|
def dumps(self, data):
|
|
return zlib.compress(json.dumps(data).encode('utf-8'))
|
|
|
|
|
|
def serialize(data, method):
|
|
if method == 'json':
|
|
serializer = JsonSerializer()
|
|
else:
|
|
serializer = PickleSerializer()
|
|
return serializer.dumps(data)
|
|
|
|
|
|
def deserialize(data_string, method):
|
|
if method == 'json':
|
|
serializer = JsonSerializer()
|
|
else:
|
|
serializer = PickleSerializer()
|
|
return serializer.loads(data_string)
|
|
|
|
|
|
def machine_identifier():
|
|
machine_hash = hashlib.md5()
|
|
if not PY2:
|
|
machine_hash.update(socket.gethostname().encode())
|
|
else:
|
|
machine_hash.update(socket.gethostname())
|
|
return binascii.hexlify(machine_hash.digest()[0:3]).decode('ascii')
|
|
|
|
|
|
def safe_write (filepath, contents):
|
|
if os.name == 'posix':
|
|
tempname = '%s.temp' % (filepath)
|
|
fh = open(tempname, 'wb')
|
|
fh.write(contents)
|
|
fh.close()
|
|
os.rename(tempname, filepath)
|
|
else:
|
|
fh = open(filepath, 'wb')
|
|
fh.write(contents)
|
|
fh.close()
|