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1503 lines (1211 loc) · 52.6 KB
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# Copyright 2013 Google Inc. All Rights Reserved.
#
# 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.
"""Common client library functions and classes used by all products."""
import abc
import base64
import binascii
from functools import wraps
import inspect
from itertools import izip
import locale
import logging
import logging.config
import os
import ssl
import sys
import threading
import urllib2
import warnings
import lxml.builder
import lxml.etree
import requests.exceptions
import suds
import suds.cache
import suds.client
import suds.mx.literal
import suds.plugin
import suds.transport.http
import suds.xsd.doctor
import yaml
import zeep
import zeep.cache
import zeep.exceptions
import zeep.helpers
import zeep.transports
import zeep.xsd
import googleads.errors
import googleads.oauth2
import googleads.util
try:
import urllib2.HTTPSHandler
except ImportError:
# Python versions below 2.7.9 / 3.4 won't have this. In order to offer legacy
# support (for now) we will work around this gracefully, but users will
# not have certificate validation performed until they update.
pass
logging.getLogger('suds.client').addFilter(googleads.util.GetSudsClientFilter())
logging.getLogger('suds.mx.core').addFilter(
googleads.util.GetSudsMXCoreFilter())
logging.getLogger('suds.mx.literal').addFilter(
googleads.util.GetSudsMXLiteralFilter())
logging.getLogger('suds.transport.http').addFilter(
googleads.util.GetSudsTransportFilter())
_logger = logging.getLogger(__name__)
_PY_VERSION_MAJOR = sys.version_info.major
_PY_VERSION_MINOR = sys.version_info.minor
_PY_VERSION_MICRO = sys.version_info.micro
_DEPRECATED_VERSION_TEMPLATE = (
'This library is being run by an unsupported Python version (%s.%s.%s). In '
'order to benefit from important security improvements and ensure '
'compatibility with this library, upgrade to Python 2.7.9 or higher.')
VERSION = '18.0.0'
_COMMON_LIB_SIG = 'googleads/%s' % VERSION
_LOGGING_KEY = 'logging'
_HTTP_PROXY_YAML_KEY = 'http'
_HTTPS_PROXY_YAML_KEY = 'https'
_PROXY_CONFIG_KEY = 'proxy_config'
_PYTHON_VERSION = 'Python/%d.%d.%d' % (
_PY_VERSION_MAJOR, _PY_VERSION_MINOR, _PY_VERSION_MICRO)
# The required keys in the authentication dictionary that are used to construct
# installed application OAuth2 credentials.
_OAUTH2_INSTALLED_APP_KEYS = ('client_id', 'client_secret', 'refresh_token')
# The keys in the authentication dictionary that are used to construct service
# account OAuth2 credentials.
_OAUTH2_SERVICE_ACCT_KEYS = ('path_to_private_key_file',)
_OAUTH2_SERVICE_ACCT_KEYS_OPTIONAL = ('delegated_account',)
# A key used to configure the client to accept and automatically decompress
# gzip encoded SOAP responses.
ENABLE_COMPRESSION_KEY = 'enable_compression'
# A key used to configure the client to send arbitrary headers in SOAP requests.
CUSTOM_HEADERS_KEY = 'custom_http_headers'
# A key used to specify the SOAP implementation to use.
SOAP_IMPLEMENTATION_KEY = 'soap_impl'
# Global variables used to enable and store utility usage stats.
_utility_registry = googleads.util.UtilityRegistry()
_UTILITY_REGISTER_YAML_KEY = 'include_utilities_in_user_agent'
_UTILITY_LOCK = threading.Lock()
# Apply any necessary patches to dependency libraries.
googleads.util.PatchHelper().Apply()
def GenerateLibSig(short_name):
"""Generates a library signature suitable for a user agent field.
Args:
short_name: The short, product-specific string name for the library.
Returns:
A library signature string to append to user-supplied user-agent value.
"""
with _UTILITY_LOCK:
utilities_used = ', '.join([utility for utility
in sorted(_utility_registry)])
_utility_registry.Clear()
if utilities_used:
return ' (%s, %s, %s, %s)' % (short_name, _COMMON_LIB_SIG, _PYTHON_VERSION,
utilities_used)
else:
return ' (%s, %s, %s)' % (short_name, _COMMON_LIB_SIG, _PYTHON_VERSION)
class CommonClient(object):
"""Contains shared startup code between Ad Manager and AdWords clients."""
def __init__(self):
# Warn users on deprecated Python versions on initialization.
if _PY_VERSION_MAJOR == 2:
if _PY_VERSION_MINOR == 7 and _PY_VERSION_MICRO < 9:
_logger.warning(_DEPRECATED_VERSION_TEMPLATE, _PY_VERSION_MAJOR,
_PY_VERSION_MINOR, _PY_VERSION_MICRO)
elif _PY_VERSION_MINOR < 7:
_logger.warning(_DEPRECATED_VERSION_TEMPLATE, _PY_VERSION_MAJOR,
_PY_VERSION_MINOR, _PY_VERSION_MICRO)
# Warn users about using non-utf8 encoding
_, encoding = locale.getdefaultlocale()
if encoding is None or encoding.lower() != 'utf-8':
_logger.warn('Your default encoding, %s, is not UTF-8. Please run this'
' script with UTF-8 encoding to avoid errors.', encoding)
def LoadFromString(yaml_doc, product_yaml_key, required_client_values,
optional_product_values):
"""Loads the data necessary for instantiating a client from file storage.
In addition to the required_client_values argument, the yaml file must supply
the keys used to create OAuth2 credentials. It may also optionally set proxy
configurations.
Args:
yaml_doc: the yaml document whose keys should be used.
product_yaml_key: The key to read in the yaml as a string.
required_client_values: A tuple of strings representing values which must
be in the yaml file for a supported API. If one of these keys is not in
the yaml file, an error will be raised.
optional_product_values: A tuple of strings representing optional values
which may be in the yaml file.
Returns:
A dictionary map of the keys in the yaml file to their values. This will not
contain the keys used for OAuth2 client creation and instead will have a
GoogleOAuth2Client object stored in the 'oauth2_client' field.
Raises:
A GoogleAdsValueError if the given yaml file does not contain the
information necessary to instantiate a client object - either a
required_client_values key was missing or an OAuth2 key was missing.
"""
data = yaml.safe_load(yaml_doc) or {}
if 'dfp' in data:
raise googleads.errors.GoogleAdsValueError(
'Please replace the "dfp" key in the configuration YAML string with'
'"ad_manager" to fix this issue.')
logging_config = data.get(_LOGGING_KEY)
if logging_config:
logging.config.dictConfig(logging_config)
try:
product_data = data[product_yaml_key]
except KeyError:
raise googleads.errors.GoogleAdsValueError(
'The "%s" configuration is missing'
% (product_yaml_key,))
if not isinstance(product_data, dict):
raise googleads.errors.GoogleAdsValueError(
'The "%s" configuration is empty or invalid'
% (product_yaml_key,))
IncludeUtilitiesInUserAgent(data.get(_UTILITY_REGISTER_YAML_KEY, True))
original_keys = list(product_data.keys())
client_kwargs = {}
try:
for key in required_client_values:
client_kwargs[key] = product_data[key]
del product_data[key]
except KeyError:
raise googleads.errors.GoogleAdsValueError(
'Some of the required values are missing. Required '
'values are: %s, actual values are %s'
% (required_client_values, original_keys))
proxy_config_data = data.get(_PROXY_CONFIG_KEY, {})
proxy_config = _ExtractProxyConfig(product_yaml_key, proxy_config_data)
client_kwargs['proxy_config'] = proxy_config
client_kwargs['oauth2_client'] = _ExtractOAuth2Client(
product_yaml_key, product_data, proxy_config)
client_kwargs[ENABLE_COMPRESSION_KEY] = data.get(
ENABLE_COMPRESSION_KEY, False)
client_kwargs[CUSTOM_HEADERS_KEY] = data.get(CUSTOM_HEADERS_KEY, None)
if SOAP_IMPLEMENTATION_KEY in data:
client_kwargs[SOAP_IMPLEMENTATION_KEY] = data[SOAP_IMPLEMENTATION_KEY]
for value in optional_product_values:
if value in product_data:
client_kwargs[value] = product_data[value]
del product_data[value]
if product_data:
warnings.warn('Could not recognize the following keys: %s. '
'They were ignored.' % (product_data,), stacklevel=3)
return client_kwargs
def LoadFromStorage(path, product_yaml_key, required_client_values,
optional_product_values):
"""Loads the data necessary for instantiating a client from file storage.
In addition to the required_client_values argument, the yaml file must supply
the keys used to create OAuth2 credentials. It may also optionally set proxy
configurations.
Args:
path: A path string to the yaml document whose keys should be used.
product_yaml_key: The key to read in the yaml as a string.
required_client_values: A tuple of strings representing values which must
be in the yaml file for a supported API. If one of these keys is not in
the yaml file, an error will be raised.
optional_product_values: A tuple of strings representing optional values
which may be in the yaml file.
Returns:
A dictionary map of the keys in the yaml file to their values. This will not
contain the keys used for OAuth2 client creation and instead will have a
GoogleOAuth2Client object stored in the 'oauth2_client' field.
Raises:
A GoogleAdsValueError if the given yaml file does not contain the
information necessary to instantiate a client object - either a
required_client_values key was missing or an OAuth2 key was missing.
"""
if not os.path.isabs(path):
path = os.path.expanduser(path)
try:
with open(path, 'rb') as handle:
yaml_doc = handle.read()
except IOError:
raise googleads.errors.GoogleAdsValueError(
'Given yaml file, %s, could not be opened.' % path)
try:
client_kwargs = LoadFromString(yaml_doc, product_yaml_key,
required_client_values,
optional_product_values)
except googleads.errors.GoogleAdsValueError as e:
raise googleads.errors.GoogleAdsValueError(
'Given yaml file, %s, could not find some keys. %s' % (path, e))
return client_kwargs
def _ExtractOAuth2Client(product_yaml_key, product_data, proxy_config):
"""Generates an GoogleOAuth2Client subclass using the given product_data.
Args:
product_yaml_key: a string key identifying the product being configured.
product_data: a dict containing the configurations for a given product.
proxy_config: a ProxyConfig instance.
Returns:
An instantiated GoogleOAuth2Client subclass.
Raises:
A GoogleAdsValueError if the OAuth2 configuration for the given product is
misconfigured.
"""
oauth2_kwargs = {
'proxy_config': proxy_config
}
if all(config in product_data for config in _OAUTH2_INSTALLED_APP_KEYS):
oauth2_args = [
product_data['client_id'], product_data['client_secret'],
product_data['refresh_token']
]
oauth2_client = googleads.oauth2.GoogleRefreshTokenClient
for key in _OAUTH2_INSTALLED_APP_KEYS:
del product_data[key]
elif all(config in product_data for config in _OAUTH2_SERVICE_ACCT_KEYS):
oauth2_args = [
product_data['path_to_private_key_file'],
googleads.oauth2.GetAPIScope(product_yaml_key),
]
oauth2_kwargs.update({
'sub': product_data.get('delegated_account')
})
oauth2_client = googleads.oauth2.GoogleServiceAccountClient
for key in _OAUTH2_SERVICE_ACCT_KEYS:
del product_data[key]
for optional_key in _OAUTH2_SERVICE_ACCT_KEYS_OPTIONAL:
if optional_key in product_data:
del product_data[optional_key]
else:
raise googleads.errors.GoogleAdsValueError(
'Your yaml file is incorrectly configured for OAuth2. You need to '
'specify credentials for either the installed application flow (%s) '
'or service account flow (%s).' %
(_OAUTH2_INSTALLED_APP_KEYS, _OAUTH2_SERVICE_ACCT_KEYS))
return oauth2_client(*oauth2_args, **oauth2_kwargs)
def _ExtractProxyConfig(product_yaml_key, proxy_config_data):
"""Returns an initialized ProxyConfig using the given proxy_config_data.
Args:
product_yaml_key: a string indicating the client being loaded.
proxy_config_data: a dict containing the contents of proxy_config from the
YAML file.
Returns:
If there is a proxy to configure in proxy_config, this will return a
ProxyConfig instance with those settings. Otherwise, it will return None.
Raises:
A GoogleAdsValueError if one of the required keys specified by _PROXY_KEYS
is missing.
"""
cafile = proxy_config_data.get('cafile', None)
disable_certificate_validation = proxy_config_data.get(
'disable_certificate_validation', False)
http_proxy = proxy_config_data.get(_HTTP_PROXY_YAML_KEY)
https_proxy = proxy_config_data.get(_HTTPS_PROXY_YAML_KEY)
proxy_config = ProxyConfig(
http_proxy=http_proxy,
https_proxy=https_proxy,
cafile=cafile,
disable_certificate_validation=disable_certificate_validation)
return proxy_config
def _PackForSuds(obj, factory, packer=None, version=None):
"""Packs SOAP input into the format we want for suds.
The main goal here is to pack dictionaries with an 'xsi_type' key into
objects. This allows dictionary syntax to be used even with complex types
extending other complex types. The contents of dictionaries and lists/tuples
are recursively packed. Mutable types are copied - we don't mutate the input.
Args:
obj: A parameter for a SOAP request which will be packed. If this is
a dictionary or list, the contents will recursively be packed. If this
is not a dictionary or list, the contents will be recursively searched
for instances of unpacked dictionaries or lists.
factory: The suds.client.Factory object which can create instances of the
classes generated from the WSDL.
packer: An optional subclass of googleads.common.SoapPacker that provides
customized packing logic.
version: the version of the current API, e.g. 'v201811'
Returns:
If the given obj was a dictionary that contained the 'xsi_type' key, this
will be an instance of a class generated from the WSDL. Otherwise, this will
be the same data type as the input obj was.
"""
if packer:
obj = packer.Pack(obj, version)
if obj in ({}, None):
# Force suds to serialize empty objects. There are legitimate use cases for
# this, for example passing in an empty SearchCriteria object to a DFA
# search method in order to select everything.
return suds.null()
elif isinstance(obj, dict):
if 'xsi_type' in obj:
try:
new_obj = factory.create(obj['xsi_type'])
except suds.TypeNotFound:
new_obj = factory.create(':'.join(['ns0', obj['xsi_type']]))
# Suds sends an empty XML element for enum types which are not set. None
# of Google's Ads APIs will accept this. Initializing all of the fields in
# a suds object to None will ensure that they don't get serialized at all
# unless the user sets a value. User values explicitly set to None will be
# packed into a suds.null() object.
for param, _ in new_obj:
# Another problem is that the suds.mx.appender.ObjectAppender won't
# serialize object types with no fields set, but both AdWords and Ad
# Manager rely on sending objects with just the xsi:type set. The
# below "if" statement is an ugly hack that gets this to work in all(?)
# situations by taking advantage of the fact that these classes
# generally all have a type field. The only other option is to monkey
# patch ObjectAppender.
if param.endswith('.Type'):
setattr(new_obj, param, obj['xsi_type'])
else:
setattr(new_obj, param, None)
for key in obj:
if key == 'xsi_type': continue
setattr(new_obj, key, _PackForSuds(obj[key], factory,
packer=packer))
else:
new_obj = {}
for key in obj:
new_obj[key] = _PackForSuds(obj[key], factory,
packer=packer)
return new_obj
elif isinstance(obj, (list, tuple)):
return [_PackForSuds(item, factory,
packer=packer) for item in obj]
else:
_RecurseOverObject(obj, factory)
return obj
def _RecurseOverObject(obj, factory, parent=None):
"""Recurses over a nested structure to look for changes in Suds objects.
Args:
obj: A parameter for a SOAP request field which is to be inspected and
will be packed for Suds if an xsi_type is specified, otherwise will be
left unaltered.
factory: The suds.client.Factory object which can create instances of the
classes generated from the WSDL.
parent: The parent object that contains the obj parameter to be inspected.
"""
if _IsSudsIterable(obj):
# Since in-place modification of the Suds object is taking place, the
# iterator should be done over a frozen copy of the unpacked fields.
copy_of_obj = tuple(obj)
for item in copy_of_obj:
if _IsSudsIterable(item):
if 'xsi_type' in item:
if isinstance(obj, tuple):
parent[obj[0]] = _PackForSuds(obj[1], factory)
else:
obj.remove(item)
obj.append(_PackForSuds(item, factory))
_RecurseOverObject(item, factory, obj)
def _IsSudsIterable(obj):
"""A short helper method to determine if a field is iterable for Suds."""
return obj and not isinstance(obj, basestring) and hasattr(obj, '__iter__')
def IncludeUtilitiesInUserAgent(value):
"""Configures the logging of utilities in the User-Agent.
Args:
value: a bool indicating that you want to include utility names in the
User-Agent if set True, otherwise, these will not be added.
"""
with _UTILITY_LOCK:
_utility_registry.SetEnabled(value)
def AddToUtilityRegistry(utility_name):
"""Directly add a utility to the registry, not a decorator.
Args:
utility_name: The name of the utility to add.
"""
with _UTILITY_LOCK:
_utility_registry.Add(utility_name)
def RegisterUtility(utility_name, version_mapping=None):
"""Decorator that registers a class with the given utility name.
This will only register the utilities being used if the UtilityRegistry is
enabled. Note that only the utility class's public methods will cause the
utility name to be added to the registry.
Args:
utility_name: A str specifying the utility name associated with the class.
version_mapping: A dict containing optional version strings to append to the
utility string for individual methods; where the key is the method name and
the value is the text to be appended as the version.
Returns:
The decorated class.
"""
def IsFunctionOrMethod(member):
"""Determines if given member is a function or method.
These two are used in combination to ensure that inspect finds all of a
given utility class's methods in both Python 2 and 3.
Args:
member: object that is a member of a class, to be determined whether it is
a function or method.
Returns:
A boolean that is True if the provided member is a function or method, or
False if it isn't.
"""
return inspect.isfunction(member) or inspect.ismethod(member)
def MethodDecorator(utility_method, version):
"""Decorates a method in the utility class."""
registry_name = ('%s/%s' % (utility_name, version) if version
else utility_name)
@wraps(utility_method)
def Wrapper(*args, **kwargs):
AddToUtilityRegistry(registry_name)
return utility_method(*args, **kwargs)
return Wrapper
def ClassDecorator(cls):
"""Decorates a utility class."""
for name, method in inspect.getmembers(cls, predicate=IsFunctionOrMethod):
# Public methods of the class will have the decorator applied.
if not name.startswith('_'):
# The decorator will only be applied to unbound methods; this prevents
# it from clobbering class methods. If the attribute doesn't exist, set
# None for PY3 compatibility.
if not getattr(method, '__self__', None):
setattr(cls, name, MethodDecorator(
method, version_mapping.get(name) if version_mapping else None))
return cls
return ClassDecorator
class ProxyConfig(object):
"""A utility for configuring the usage of a proxy."""
def __init__(self, http_proxy=None, https_proxy=None, cafile=None,
disable_certificate_validation=False):
self._http_proxy = http_proxy
self._https_proxy = https_proxy
self.proxies = {}
if self._https_proxy:
self.proxies['https'] = str(self._https_proxy)
if self._http_proxy:
self.proxies['http'] = str(self._http_proxy)
self.disable_certificate_validation = disable_certificate_validation
self.cafile = None if disable_certificate_validation else cafile
# Initialize the context used to generate the urllib2.HTTPSHandler (in
# Python 2.7.9+ and 3.4+) used by suds and urllib2.
self.ssl_context = self._InitSSLContext(
self.cafile, self.disable_certificate_validation)
def _InitSSLContext(self, cafile=None,
disable_ssl_certificate_validation=False):
"""Creates a ssl.SSLContext with the given settings.
Args:
cafile: A str identifying the resolved path to the cafile. If not set,
this will use the system default cafile.
disable_ssl_certificate_validation: A boolean indicating whether
certificate verification is disabled. For security purposes, it is
highly recommended that certificate verification remain enabled.
Returns:
An ssl.SSLContext instance, or None if the version of Python being used
doesn't support it.
"""
# Attempt to create a context; this should succeed in Python 2 versions
# 2.7.9+ and Python 3 versions 3.4+.
try:
if disable_ssl_certificate_validation:
ssl._create_default_https_context = ssl._create_unverified_context
ssl_context = ssl.create_default_context()
else:
ssl_context = ssl.create_default_context(cafile=cafile)
except AttributeError:
# Earlier versions lack ssl.create_default_context()
# Rather than raising the exception, no context will be provided for
# legacy support. Of course, this means no certificate validation is
# taking place!
return None
return ssl_context
def BuildOpener(self):
"""Builds an OpenerDirector instance using the ProxyConfig settings.
In Python 2, this will return a urllib2.OpenerDirector instance. In Python
3, this will return a urllib.request.OpenerDirector instance.
Returns:
An OpenerDirector instance instantiated with settings defined in the
ProxyConfig instance.
"""
return urllib2.build_opener(*self.GetHandlers())
def GetHandlers(self):
"""Retrieve the appropriate urllib2 handlers for the given configuration.
Returns:
A list of urllib2.BaseHandler subclasses to be used when making calls
with proxy.
"""
handlers = []
if self.ssl_context:
handlers.append(urllib2.HTTPSHandler(context=self.ssl_context))
if self.proxies:
handlers.append(urllib2.ProxyHandler(self.proxies))
return handlers
def GetSudsProxyTransport(self):
"""Retrieve a suds.transport.http.HttpTransport to be used with suds.
This will apply all handlers relevant to the usage of the proxy
configuration automatically.
Returns:
A _SudsProxyTransport instance used to make requests with suds using the
configured proxy.
"""
return self._SudsProxyTransport(self.GetHandlers())
class _ZeepProxyTransport(zeep.transports.Transport):
"""A Zeep transport which configures caching, proxy support, and timeouts."""
def __init__(self, timeout, proxy_config, cache):
"""Initializes _ZeepProxyTransport.
Args:
timeout: An integer timeout in MS for connections.
proxy_config: A ProxyConfig instance representing proxy settings.
cache: A zeep.cache.Base instance representing a cache strategy to employ.
"""
if not cache:
cache = zeep.cache.SqliteCache()
elif cache == ZeepServiceProxy.NO_CACHE:
cache = None
super(_ZeepProxyTransport, self).__init__(
timeout=timeout, operation_timeout=timeout, cache=cache)
self.session.proxies = proxy_config.proxies
class _SudsProxyTransport(suds.transport.http.HttpTransport):
"""A transport that applies the given handlers for usage with a proxy."""
def __init__(self, timeout, proxy_config):
"""Initializes SudsHTTPSTransport.
Args:
timeout: An integer for the connection timeout time.
proxy_config: A ProxyConfig instance representing proxy settings.
"""
suds.transport.http.HttpTransport.__init__(self, timeout=timeout)
self.handlers = proxy_config.GetHandlers()
def u2handlers(self):
"""Get a collection of urllib2 handlers to be installed in the opener.
Returns:
A list of handlers to be installed to the OpenerDirector used by suds.
"""
# Start with the default set of handlers.
return_handlers = suds.transport.http.HttpTransport.u2handlers(self)
return_handlers.extend(self.handlers)
return return_handlers
class SoapPacker(object):
"""A utility class to be passed to argument packing functions.
A subclass should be used in cases where custom logic is needed to pack a
given object in argument packing functions.
"""
@classmethod
def Pack(cls, obj):
raise NotImplementedError('You must subclass SoapPacker.')
def GetSchemaHelperForLibrary(lib_name):
if lib_name == 'suds':
return SudsSchemaHelper
elif lib_name == 'zeep':
return ZeepSchemaHelper
class GoogleSchemaHelper(object):
"""Base class for type to xml conversion.
Only used for AdWords reporting specialness. A subclass should be created
for each underlying SOAP implementation.
"""
__metaclass__ = abc.ABCMeta
@abc.abstractmethod
def GetSoapXMLForComplexType(self, type_name, value):
"""Return an XML string representing a SOAP complex type.
Args:
type_name: The name of the type with namespace prefix if necessary.
value: A python dictionary to hydrate the type instance with.
Returns:
A string containing the SOAP XML for the type.
"""
return
class SudsSchemaHelper(GoogleSchemaHelper):
"""Suds schema helper implementation."""
def __init__(self, endpoint, timeout,
proxy_config, namespace_override, cache):
"""Initializes a SudsSchemaHelper.
Args:
endpoint: A string representing the URL to connect to.
timeout: An integer timeout in MS used to determine connection timeouts.
proxy_config: A googleads.common.ProxyConfig instance which represents
the proxy settings needed.
namespace_override: A string to doctor the WSDL namespace with.
cache: An instance of suds.cache.Cache to use for caching.
Raises:
GoogleAdsValueError: The wrong type was given for caching.
"""
if cache and not isinstance(cache, suds.cache.Cache):
raise googleads.errors.GoogleAdsValueError(
'Must use a proper suds cache with suds.')
transport = _SudsProxyTransport(timeout, proxy_config)
try:
doctor = suds.xsd.doctor.ImportDoctor(
suds.xsd.doctor.Import(
namespace_override, endpoint))
self.suds_client = suds.client.Client(
endpoint,
transport=transport,
plugins=[LoggingMessagePlugin()],
cache=cache,
doctor=doctor)
self._namespace_override = namespace_override
except suds.transport.TransportError as e:
raise googleads.errors.GoogleAdsSoapTransportError(str(e))
def GetSoapXMLForComplexType(self, type_name, value):
"""Return an XML string representing a SOAP complex type.
Args:
type_name: The name of the type with namespace prefix if necessary.
value: A python dictionary to hydrate the type instance with.
Returns:
A string containing the SOAP XML for the type.
"""
schema = self.suds_client.wsdl.schema
definition_type = schema.elements[(type_name, self._namespace_override)]
marshaller = suds.mx.literal.Literal(schema)
content = suds.mx.Content(
tag=type_name, value=value,
name=type_name, type=definition_type)
data = marshaller.process(content)
return data
class ZeepSchemaHelper(GoogleSchemaHelper):
"""Zeep schema helper implementation."""
def __init__(self, endpoint, timeout,
proxy_config, namespace_override, cache):
"""Initializes a ZeepSchemaHelper.
Args:
endpoint: A string representing the URL to connect to.
timeout: An integer timeout in MS used to determine connection timeouts.
proxy_config: A googleads.common.ProxyConfig instance which represents
the proxy settings needed.
namespace_override: A string to doctor the WSDL namespace with.
cache: An instance of zeep.cache.Base to use for caching.
Raises:
GoogleAdsValueError: The wrong type was given for caching.
"""
if cache and not (isinstance(cache, zeep.cache.Base) or
cache == ZeepServiceProxy.NO_CACHE):
raise googleads.errors.GoogleAdsValueError(
'Must use a proper zeep cache with zeep.')
transport = _ZeepProxyTransport(timeout, proxy_config, cache)
try:
data = transport.load(endpoint)
except requests.exceptions.HTTPError as e:
raise googleads.errors.GoogleAdsSoapTransportError(str(e))
self.schema = zeep.xsd.Schema(lxml.etree.fromstring(data))
self._namespace_override = namespace_override
self._element_maker = lxml.builder.ElementMaker(
namespace=namespace_override, nsmap={'tns': namespace_override})
def GetSoapXMLForComplexType(self, type_name, value):
"""Return an XML string representing a SOAP complex type.
Args:
type_name: The name of the type with namespace prefix if necessary.
value: A python dictionary to hydrate the type instance with.
Returns:
A string containing the SOAP XML for the type.
"""
element = self.schema.get_element(
'{%s}%s' % (self._namespace_override, type_name))
result_element = self._element_maker(element.qname.localname)
element_value = element(**value)
element.type.render(result_element, element_value)
data = lxml.etree.tostring(result_element).strip()
return data
def GetServiceClassForLibrary(lib_name):
if lib_name == 'suds':
return SudsServiceProxy
elif lib_name == 'zeep':
return ZeepServiceProxy
class GoogleSoapService(object):
"""Base class for a SOAP service representation.
A subclass should be created for each underlying SOAP implementation.
"""
__metaclass__ = abc.ABCMeta
def __init__(self, header_handler, packer, version):
"""Initializes a SOAP service.
Args:
header_handler: A googleads.common.HeaderHandler instance used to set
SOAP and HTTP headers.
packer: A googleads.common.SoapPacker instance used to transform
entities.
version: the version of the current API, e.g. 'v201811'
"""
self._header_handler = header_handler
self._packer = packer
self._version = version
self._method_proxies = {}
@abc.abstractmethod
def CreateSoapElementForType(self, type_name):
"""Create an instance of a SOAP type.
Args:
type_name: The name of the type.
Returns:
An instance of type type_name.
"""
@abc.abstractmethod
def GetRequestXML(self, method, *args):
"""Get the raw SOAP XML for a request.
Args:
method: The method name.
*args: A list of arguments to be passed to the method.
Returns:
An element containing the raw XML that would be sent as the request.
"""
@abc.abstractmethod
def _WsdlHasMethod(self, method_name):
"""Determine if the wsdl contains a method.
Args:
method_name: The name of the method to search.
Returns:
True if the method is in the WSDL, otherwise False.
"""
@abc.abstractmethod
def _CreateMethod(self, method_name):
"""Create a method wrapping an invocation to the SOAP service.
Args:
method_name: A string identifying the name of the SOAP method to call.
Returns:
A callable that can be used to make the desired SOAP request.
"""
def __getattr__(self, attr):
"""Support service.method() syntax."""
if self._WsdlHasMethod(attr):
if attr not in self._method_proxies:
self._method_proxies[attr] = self._CreateMethod(attr)
return self._method_proxies[attr]
else:
raise googleads.errors.GoogleAdsValueError('Service %s not found' % attr)
class SudsServiceProxy(GoogleSoapService):
"""Wraps a suds service object, allowing custom logic to be injected.
This class is responsible for refreshing the HTTP and SOAP headers, so changes
to the client object will be reflected in future SOAP calls, and for
transforming SOAP call input parameters, allowing dictionary syntax to be used
with all SOAP complex types.
Attributes:
suds_client: The suds.client.Client this service belongs to. If you are
familiar with suds and want to use autogenerated classes, you can access
the client and its factory,
"""
def __init__(self, endpoint, header_handler, packer, proxy_config,
timeout, version, cache=None):
"""Initializes a suds service proxy.
Args:
endpoint: A URL for the service.
header_handler: A HeaderHandler responsible for setting the SOAP and HTTP
headers on the service client.
packer: An optional subclass of googleads.common.SoapPacker that provides
customized packing logic.
proxy_config: A ProxyConfig that represents proxy settings.
timeout: An integer to set the connection timeout.
version: the current version of the library, e.g. 'v201811'
cache: A suds.cache.Cache instance to pass to the underlying SOAP
library for caching.
Raises:
GoogleAdsValueError: The wrong type was given for caching.
"""
super(SudsServiceProxy, self).__init__(header_handler, packer, version)
if cache and not isinstance(cache, suds.cache.Cache):
raise googleads.errors.GoogleAdsValueError(
'Must use a proper suds cache with suds.')
transport = _SudsProxyTransport(timeout, proxy_config)
self._method_proxies = {}
try:
self.suds_client = suds.client.Client(
endpoint,
timeout=timeout,
cache=cache,
transport=transport,
plugins=[LoggingMessagePlugin()])
except suds.transport.TransportError as e:
raise googleads.errors.GoogleAdsSoapTransportError(str(e))
def GetRequestXML(self, method, *args):
"""Get the raw SOAP XML for a request.
Args:
method: The method name.
*args: A list of arguments to be passed to the method.
Returns:
An element containing the raw XML that would be sent as the request.
"""
self.suds_client.set_options(nosend=True)
service_request = (getattr(self, method))(*args).envelope
self.suds_client.set_options(nosend=False)
return lxml.etree.fromstring(service_request)