コード例 #1
0
def _get_impl():
    """Delay import of rpc_backend until configuration is loaded."""
    global _RPCIMPL
    if _RPCIMPL is None:
        try:
            _RPCIMPL = importutils.import_module(CONF.rpc_backend)
        except ImportError:
            # For backwards compatibility with older nova config.
            impl = CONF.rpc_backend.replace('nova.rpc',
                                            'nova.openstack.common.rpc')
            _RPCIMPL = importutils.import_module(impl)
    return _RPCIMPL
コード例 #2
0
ファイル: __init__.py プロジェクト: vdialani/trove
def _get_impl():
    """Delay import of rpc_backend until configuration is loaded."""
    global _RPCIMPL
    if _RPCIMPL is None:
        try:
            _RPCIMPL = importutils.import_module(CONF.rpc_backend)
        except ImportError:
            # For backwards compatibility with older nova config.
            impl = CONF.rpc_backend.replace('nova.rpc',
                                            'nova.openstack.common.rpc')
            _RPCIMPL = importutils.import_module(impl)
    return _RPCIMPL
コード例 #3
0
ファイル: api.py プロジェクト: vdialani/trove
def add_driver(notification_driver):
    """Add a notification driver at runtime."""
    # Make sure the driver list is initialized.
    _get_drivers()
    if isinstance(notification_driver, basestring):
        # Load and add
        try:
            driver = importutils.import_module(notification_driver)
            _drivers[notification_driver] = driver
        except ImportError:
            LOG.exception(_("Failed to load notifier %s. "
                            "These notifications will not be sent.") %
                          notification_driver)
    else:
        # Driver is already loaded; just add the object.
        _drivers[notification_driver] = notification_driver
コード例 #4
0
def deserialize_remote_exception(conf, data):
    failure = jsonutils.loads(str(data))

    trace = failure.get('tb', [])
    message = failure.get('message', "") + "\n" + "\n".join(trace)
    name = failure.get('class')
    module = failure.get('module')

    # NOTE(ameade): We DO NOT want to allow just any module to be imported, in
    # order to prevent arbitrary code execution.
    if module not in conf.allowed_rpc_exception_modules:
        return RemoteError(name, failure.get('message'), trace)

    try:
        mod = importutils.import_module(module)
        klass = getattr(mod, name)
        if not issubclass(klass, Exception):
            raise TypeError("Can only deserialize Exceptions")

        failure = klass(*failure.get('args', []), **failure.get('kwargs', {}))
    except (AttributeError, TypeError, ImportError):
        return RemoteError(name, failure.get('message'), trace)

    ex_type = type(failure)
    str_override = lambda self: message
    new_ex_type = type(ex_type.__name__ + _REMOTE_POSTFIX, (ex_type, ), {
        '__str__': str_override,
        '__unicode__': str_override
    })
    new_ex_type.__module__ = '%s%s' % (module, _REMOTE_POSTFIX)
    try:
        # NOTE(ameade): Dynamically create a new exception type and swap it in
        # as the new type for the exception. This only works on user defined
        # Exceptions and not core python exceptions. This is important because
        # we cannot necessarily change an exception message so we must override
        # the __str__ method.
        failure.__class__ = new_ex_type
    except TypeError:
        # NOTE(ameade): If a core exception then just add the traceback to the
        # first exception argument.
        failure.args = (message, ) + failure.args[1:]
    return failure
コード例 #5
0
def deserialize_remote_exception(conf, data):
    failure = jsonutils.loads(str(data))

    trace = failure.get('tb', [])
    message = failure.get('message', "") + "\n" + "\n".join(trace)
    name = failure.get('class')
    module = failure.get('module')

    # NOTE(ameade): We DO NOT want to allow just any module to be imported, in
    # order to prevent arbitrary code execution.
    if module not in conf.allowed_rpc_exception_modules:
        return RemoteError(name, failure.get('message'), trace)

    try:
        mod = importutils.import_module(module)
        klass = getattr(mod, name)
        if not issubclass(klass, Exception):
            raise TypeError("Can only deserialize Exceptions")

        failure = klass(*failure.get('args', []), **failure.get('kwargs', {}))
    except (AttributeError, TypeError, ImportError):
        return RemoteError(name, failure.get('message'), trace)

    ex_type = type(failure)
    str_override = lambda self: message
    new_ex_type = type(ex_type.__name__ + _REMOTE_POSTFIX, (ex_type,),
                       {'__str__': str_override, '__unicode__': str_override})
    new_ex_type.__module__ = '%s%s' % (module, _REMOTE_POSTFIX)
    try:
        # NOTE(ameade): Dynamically create a new exception type and swap it in
        # as the new type for the exception. This only works on user defined
        # Exceptions and not core python exceptions. This is important because
        # we cannot necessarily change an exception message so we must override
        # the __str__ method.
        failure.__class__ = new_ex_type
    except TypeError:
        # NOTE(ameade): If a core exception then just add the traceback to the
        # first exception argument.
        failure.args = (message,) + failure.args[1:]
    return failure
コード例 #6
0
 def __init__(self, hashtype='SHA256'):
     self.hashfn = importutils.import_module('Crypto.Hash.' + hashtype)
     self.max_okm_length = 255 * self.hashfn.digest_size
コード例 #7
0
 def __init__(self, enctype='AES', hashtype='SHA256'):
     self.cipher = importutils.import_module('Crypto.Cipher.' + enctype)
     self.hashfn = importutils.import_module('Crypto.Hash.' + hashtype)