Router.__init__() - Code Metrics - Inspection of "Merge pull request #2727 from StackStorm/feature/r..." - StackStorm/st2 - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Push — develop ( f534b1...a82689 )

by Plexxi

created 2017-03-23 10:00 UTC

Router.init() A

↳ Parent: Router

Complexity

Conditions

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	1
c	0
b	0
f	0
dl	0
loc	9
rs	9.6666

# Licensed to the StackStorm, Inc ('StackStorm') under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You 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.

import copy
import functools
import re
import six
import sys
import traceback

import jsonschema
from oslo_config import cfg
import routes
from six.moves.urllib import parse as urlparse  # pylint: disable=import-error
from swagger_spec_validator.validator20 import validate_spec
import webob
from webob import exc, Request

from st2common.exceptions import rbac as rbac_exc
from st2common.exceptions import auth as auth_exc
from st2common import log as logging
from st2common.persistence.auth import User
from st2common.rbac import resolvers
from st2common.util.jsonify import json_encode
from st2common.util.http import parse_content_type_header


LOG = logging.getLogger(__name__)


def op_resolver(op_id):
    module_name, func_name = op_id.split(':', 1)
    __import__(module_name)
    module = sys.modules[module_name]
    return functools.reduce(getattr, func_name.split('.'), module)


def abort(status_code=exc.HTTPInternalServerError.code, message='Unhandled exception'):
    raise exc.status_map[status_code](message)


def abort_unauthorized(msg=None):
    raise exc.HTTPUnauthorized('Unauthorized - %s' % msg if msg else 'Unauthorized')


def extend_with_default(validator_class):
    validate_properties = validator_class.VALIDATORS["properties"]

    def set_defaults(validator, properties, instance, schema):
        for property, subschema in six.iteritems(properties):

            if "default" in subschema:
                instance.setdefault(property, subschema["default"])

        for error in validate_properties(
            validator, properties, instance, schema,
        ):
            yield error

    return jsonschema.validators.extend(
        validator_class, {"properties": set_defaults},
    )


def extend_with_additional_check(validator_class):
    def set_additional_check(validator, properties, instance, schema):
        ref = schema.get("x-additional-check")
        func = op_resolver(ref)
        for error in func(validator, properties, instance, schema):
            yield error

    return jsonschema.validators.extend(
        validator_class, {"x-additional-check": set_additional_check},
    )


def extend_with_nullable(validator_class):
    validate_type = validator_class.VALIDATORS["type"]

    def set_type_draft4(validator, types, instance, schema):
        is_nullable = schema.get("x-nullable", False)

        if is_nullable and instance is None:
            return

        for error in validate_type(validator, types, instance, schema):
            yield error

    return jsonschema.validators.extend(
        validator_class, {"type": set_type_draft4},
    )


CustomValidator = jsonschema.Draft4Validator
CustomValidator = extend_with_nullable(CustomValidator)
CustomValidator = extend_with_additional_check(CustomValidator)
CustomValidator = extend_with_default(CustomValidator)


class NotFoundException(Exception):
    pass


class Response(webob.Response):
    def __init__(self, body=None, status=None, headerlist=None, app_iter=None, content_type=None,
                 *args, **kwargs):
        # Do some sanity checking, and turn json_body into an actual body
        if app_iter is None and body is None and ('json_body' in kwargs or 'json' in kwargs):
            if 'json_body' in kwargs:
                json_body = kwargs.pop('json_body')
            else:
                json_body = kwargs.pop('json')
            body = json_encode(json_body).encode('UTF-8')

            if content_type is None:
                content_type = 'application/json'

        super(Response, self).__init__(body, status, headerlist, app_iter, content_type,
                                       *args, **kwargs)

    def _json_body__get(self):
        return super(Response, self)._json_body__get()

    def _json_body__set(self, value):
        self.body = json_encode(value).encode('UTF-8')

    def _json_body__del(self):
        return super(Response, self)._json_body__del()

    json = json_body = property(_json_body__get, _json_body__set, _json_body__del)


class Router(object):
    def __init__(self, arguments=None, debug=False, auth=True):
        self.debug = debug
        self.auth = auth

        self.arguments = arguments or {}

        self.spec = {}
        self.spec_resolver = None
        self.routes = routes.Mapper()

    def add_spec(self, spec, transforms):
        info = spec.get('info', {})
        LOG.debug('Adding API: %s %s', info.get('title', 'untitled'), info.get('version', '0.0.0'))

        self.spec = spec
        self.spec_resolver = validate_spec(copy.deepcopy(self.spec))

        for filter in transforms:

            for (path, methods) in six.iteritems(spec['paths']):
                if not re.search(filter, path):
                    continue

                for (method, endpoint) in six.iteritems(methods):
                    conditions = {
                        'method': [method.upper()]
                    }

                    connect_kw = {}
                    if 'x-requirements' in endpoint:
                        connect_kw['requirements'] = endpoint['x-requirements']

                    m = self.routes.submapper(_api_path=path, _api_method=method,
                                              conditions=conditions)
                    for transform in transforms[filter]:
                        m.connect(None, re.sub(filter, transform, path), **connect_kw)

        for route in sorted(self.routes.matchlist, key=lambda r: r.routepath):
            LOG.debug('Route registered: %+6s %s', route.conditions['method'][0], route.routepath)

    def match(self, req):
        path = req.path

        if len(path) > 1 and path.endswith('/'):
            path = path[:-1]

        match = self.routes.match(path, req.environ)

        if match is None:
            raise NotFoundException('No route matches "%s" path' % req.path)

        # To account for situation when match may return multiple values
        try:
            path_vars = match[0]
        except KeyError:
            path_vars = match

        path = path_vars.pop('_api_path')
        method = path_vars.pop('_api_method')
        endpoint = self.spec['paths'][path][method]

        return endpoint, path_vars

    def __call__(self, req):
        """
        The method is invoked on every request and shows the lifecycle of the request received from
        the middleware.

        Although some middleware may use parts of the API spec, it is safe to assume that if you're
        looking for the particular spec property handler, it's most  likely a part of this method.

        At the time of writing, the only property being utilized by middleware was `x-log-result`.
        """
        endpoint, path_vars = self.match(req)

        context = copy.copy(getattr(self, 'mock_context', {}))

        # Handle security
        if 'security' in endpoint:
            security = endpoint.get('security')
        else:
            security = self.spec.get('security', [])

        if self.auth and security:
            try:
                auth_resp = None
                security_definitions = self.spec.get('securityDefinitions', {})
                for statement in security:
                    declaration, options = statement.copy().popitem()
                    definition = security_definitions[declaration]

                    if definition['type'] == 'apiKey':
                        if definition['in'] == 'header':
                            token = req.headers.get(definition['name'])
                        elif definition['in'] == 'query':
                            token = req.GET.get(definition['name'])
                        else:
                            token = None

                        if token:
                            if auth_resp:
                                raise auth_exc.MultipleAuthSourcesError(
                                    'Only one of Token or API key expected.')

                            auth_func = op_resolver(definition['x-operationId'])
                            auth_resp = auth_func(token)

                            context['user'] = User.get_by_name(auth_resp.user)

                if 'user' not in context:
                    raise auth_exc.NoAuthSourceProvidedError('One of Token or API key required.')
            except (auth_exc.NoAuthSourceProvidedError,
                    auth_exc.MultipleAuthSourcesError) as e:
                LOG.error(str(e))
                return abort_unauthorized(str(e))
            except auth_exc.TokenNotProvidedError as e:
                LOG.exception('Token is not provided.')
                return abort_unauthorized(str(e))
            except auth_exc.TokenNotFoundError as e:
                LOG.exception('Token is not found.')
                return abort_unauthorized(str(e))
            except auth_exc.TokenExpiredError as e:
                LOG.exception('Token has expired.')
                return abort_unauthorized(str(e))
            except auth_exc.ApiKeyNotProvidedError as e:
                LOG.exception('API key is not provided.')
                return abort_unauthorized(str(e))
            except auth_exc.ApiKeyNotFoundError as e:
                LOG.exception('API key is not found.')
                return abort_unauthorized(str(e))
            except auth_exc.ApiKeyDisabledError as e:
                LOG.exception('API key is disabled.')
                return abort_unauthorized(str(e))

        if cfg.CONF.rbac.enable:
            user_db = context['user']

            permission_type = endpoint.get('x-permissions', None)
            if permission_type:
                resolver = resolvers.get_resolver_for_permission_type(permission_type)
                has_permission = resolver.user_has_permission(user_db, permission_type)

                if not has_permission:
                    raise rbac_exc.ResourceTypeAccessDeniedError(user_db,
                                                                 permission_type)

        # Collect parameters
        kw = {}
        for param in endpoint.get('parameters', []) + endpoint.get('x-parameters', []):
            name = param['name']
            argument_name = param.get('x-as', None) or name
            source = param['in']
            default = param.get('default', None)

            # Collecting params from different sources
            if source == 'query':
                kw[argument_name] = req.GET.get(name, default)
            elif source == 'path':
                kw[argument_name] = path_vars[name]
            elif source == 'header':
                kw[argument_name] = req.headers.get(name, default)
            elif source == 'formData':
                kw[argument_name] = req.POST.get(name, default)
            elif source == 'environ':
                kw[argument_name] = req.environ.get(name.upper(), default)
            elif source == 'context':
                kw[argument_name] = context.get(name, default)
            elif source == 'request':
                kw[argument_name] = getattr(req, name)
            elif source == 'body':
                if req.body:
                    content_type = req.headers.get('Content-Type', 'application/json')
                    content_type = parse_content_type_header(content_type=content_type)[0]
                    schema = param['schema']

                    try:
                        if content_type == 'application/json':
                            data = req.json
                        elif content_type == 'text/plain':
                            data = req.body
                        elif content_type in ['application/x-www-form-urlencoded',
                                              'multipart/form-data']:
                            data = urlparse.parse_qs(req.body)
                        else:
                            raise ValueError('Unsupported Content-Type: "%s"' % (content_type))
                    except Exception as e:
                        detail = 'Failed to parse request body: %s' % str(e)
                        raise exc.HTTPBadRequest(detail=detail)

                    try:
                        CustomValidator(schema, resolver=self.spec_resolver).validate(data)
                    except (jsonschema.ValidationError, ValueError) as e:
                        raise exc.HTTPBadRequest(detail=e.message,
                                                 comment=traceback.format_exc())

                    if content_type == 'text/plain':
                        kw[argument_name] = data
                    else:
                        class Body(object):
                            def __init__(self, **entries):
                                self.__dict__.update(entries)

                        ref = schema.get('$ref', None)
                        if ref:
                            with self.spec_resolver.resolving(ref) as resolved:
                                schema = resolved

                        if 'x-api-model' in schema:
                            Model = op_resolver(schema['x-api-model'])
                        else:
                            Model = Body

                        kw[argument_name] = Model(**data)
                else:
                    kw[argument_name] = None

            # Making sure all required params are present
            required = param.get('required', False)
            if required and kw[argument_name] is None:
                detail = 'Required parameter "%s" is missing' % name
                raise exc.HTTPBadRequest(detail=detail)

            # Validating and casting param types
            type = param.get('type', None)

            if kw[argument_name] is not None:
                if type == 'boolean':
                    positive = ('true', '1', 'yes', 'y')
                    negative = ('false', '0', 'no', 'n')

                    if str(kw[argument_name]).lower() not in positive + negative:
                        detail = 'Parameter "%s" is not of type boolean' % argument_name
                        raise exc.HTTPBadRequest(detail=detail)

                    kw[argument_name] = str(kw[argument_name]).lower() in positive
                elif type == 'integer':
                    regex = r'^-?[0-9]+$'

                    if not re.search(regex, str(kw[argument_name])):
                        detail = 'Parameter "%s" is not of type integer' % argument_name
                        raise exc.HTTPBadRequest(detail=detail)

                    kw[argument_name] = int(kw[argument_name])
                elif type == 'number':
                    regex = r'^[+-]?(\d+(\.\d*)?|\.\d+)([eE][+-]?\d+)?$'

                    if not re.search(regex, str(kw[argument_name])):
                        detail = 'Parameter "%s" is not of type float' % argument_name
                        raise exc.HTTPBadRequest(detail=detail)

                    kw[argument_name] = float(kw[argument_name])

        # Call the controller
        func = op_resolver(endpoint['operationId'])
        resp = func(**kw)

        # Handle response
        if resp is None:
            resp = Response()

        if not hasattr(resp, '__call__'):
            resp = Response(json=resp)

        responses = endpoint.get('responses', {})
        response_spec = responses.get(str(resp.status_code), responses.get('default', None))

        if response_spec and 'schema' in response_spec:
            try:
                validator = CustomValidator(response_spec['schema'], resolver=self.spec_resolver)
                validator.validate(resp.json)
            except (jsonschema.ValidationError, ValueError):
                LOG.exception('Response validation failed.')
                resp.headers.add('Warning', '199 OpenAPI "Response validation failed"')

        return resp

    def as_wsgi(self, environ, start_response):
        """
        Converts WSGI request to webob.Request and initiates the response returned by controller.
        """
        req = Request(environ)
        resp = self(req)
        return resp(environ, start_response)


1			# Licensed to the StackStorm, Inc ('StackStorm') under one or more
2			# contributor license agreements. See the NOTICE file distributed with
3			# this work for additional information regarding copyright ownership.
4			# The ASF licenses this file to You under the Apache License, Version 2.0
5			# (the "License"); you may not use this file except in compliance with
6			# the License. You may obtain a copy of the License at
7			#
8			# http://www.apache.org/licenses/LICENSE-2.0
9			#
10			# Unless required by applicable law or agreed to in writing, software
11			# distributed under the License is distributed on an "AS IS" BASIS,
12			# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13			# See the License for the specific language governing permissions and
14			# limitations under the License.
15
16			import copy
17			import functools
18			import re
19			import six
20			import sys
21			import traceback
22
23			import jsonschema
24			from oslo_config import cfg
25			import routes
26			from six.moves.urllib import parse as urlparse # pylint: disable=import-error
27			from swagger_spec_validator.validator20 import validate_spec
28			import webob
29			from webob import exc, Request
30
31			from st2common.exceptions import rbac as rbac_exc
32			from st2common.exceptions import auth as auth_exc
33			from st2common import log as logging
34			from st2common.persistence.auth import User
35			from st2common.rbac import resolvers
36			from st2common.util.jsonify import json_encode
37			from st2common.util.http import parse_content_type_header
38
39
40			LOG = logging.getLogger(__name__)
41
42
43			def op_resolver(op_id):
44			module_name, func_name = op_id.split(':', 1)
45			__import__(module_name)
46			module = sys.modules[module_name]
47			return functools.reduce(getattr, func_name.split('.'), module)
48
49
50			def abort(status_code=exc.HTTPInternalServerError.code, message='Unhandled exception'):
51			raise exc.status_map[status_code](message)
52
53
54			def abort_unauthorized(msg=None):
55			raise exc.HTTPUnauthorized('Unauthorized - %s' % msg if msg else 'Unauthorized')
56
57
58			def extend_with_default(validator_class):
59			validate_properties = validator_class.VALIDATORS["properties"]
60
61			def set_defaults(validator, properties, instance, schema):
62			for property, subschema in six.iteritems(properties):
			0 ignored issues – show Bug Best Practice introduced 2017-01-20 05:05 UTC by Report Bug Copy Issue Report This seems to re-define the built-in `property`. It is generally discouraged to redefine built-ins as this makes code very hard to read. Loading history...
63			if "default" in subschema:
64			instance.setdefault(property, subschema["default"])
65
66			for error in validate_properties(
67			validator, properties, instance, schema,
68			):
69			yield error
70
71			return jsonschema.validators.extend(
72			validator_class, {"properties": set_defaults},
73			)
74
75
76			def extend_with_additional_check(validator_class):
77			def set_additional_check(validator, properties, instance, schema):
78			ref = schema.get("x-additional-check")
79			func = op_resolver(ref)
80			for error in func(validator, properties, instance, schema):
81			yield error
82
83			return jsonschema.validators.extend(
84			validator_class, {"x-additional-check": set_additional_check},
85			)
86
87
88			def extend_with_nullable(validator_class):
89			validate_type = validator_class.VALIDATORS["type"]
90
91			def set_type_draft4(validator, types, instance, schema):
92			is_nullable = schema.get("x-nullable", False)
93
94			if is_nullable and instance is None:
95			return
96
97			for error in validate_type(validator, types, instance, schema):
98			yield error
99
100			return jsonschema.validators.extend(
101			validator_class, {"type": set_type_draft4},
102			)
103
104
105			CustomValidator = jsonschema.Draft4Validator
106			CustomValidator = extend_with_nullable(CustomValidator)
107			CustomValidator = extend_with_additional_check(CustomValidator)
108			CustomValidator = extend_with_default(CustomValidator)
109
110
111			class NotFoundException(Exception):
112			pass
113
114
115			class Response(webob.Response):
116			def __init__(self, body=None, status=None, headerlist=None, app_iter=None, content_type=None,
117			args, *kwargs):
118			# Do some sanity checking, and turn json_body into an actual body
119			if app_iter is None and body is None and ('json_body' in kwargs or 'json' in kwargs):
120			if 'json_body' in kwargs:
121			json_body = kwargs.pop('json_body')
122			else:
123			json_body = kwargs.pop('json')
124			body = json_encode(json_body).encode('UTF-8')
125
126			if content_type is None:
127			content_type = 'application/json'
128
129			super(Response, self).__init__(body, status, headerlist, app_iter, content_type,
130			args, *kwargs)
131
132			def _json_body__get(self):
133			return super(Response, self)._json_body__get()
134
135			def _json_body__set(self, value):
136			self.body = json_encode(value).encode('UTF-8')
137
138			def _json_body__del(self):
139			return super(Response, self)._json_body__del()
140
141			json = json_body = property(_json_body__get, _json_body__set, _json_body__del)
142
143
144			class Router(object):
145			def __init__(self, arguments=None, debug=False, auth=True):
146			self.debug = debug
147			self.auth = auth
148
149			self.arguments = arguments or {}
150
151			self.spec = {}
152			self.spec_resolver = None
153			self.routes = routes.Mapper()
154
155			def add_spec(self, spec, transforms):
156			info = spec.get('info', {})
157			LOG.debug('Adding API: %s %s', info.get('title', 'untitled'), info.get('version', '0.0.0'))
158
159			self.spec = spec
160			self.spec_resolver = validate_spec(copy.deepcopy(self.spec))
161
162			for filter in transforms:
			0 ignored issues – show Bug Best Practice introduced 2017-02-28 10:29 UTC by Report Bug Copy Issue Report This seems to re-define the built-in `filter`. It is generally discouraged to redefine built-ins as this makes code very hard to read. Loading history...
163			for (path, methods) in six.iteritems(spec['paths']):
164			if not re.search(filter, path):
165			continue
166
167			for (method, endpoint) in six.iteritems(methods):
168			conditions = {
169			'method': [method.upper()]
170			}
171
172			connect_kw = {}
173			if 'x-requirements' in endpoint:
174			connect_kw['requirements'] = endpoint['x-requirements']
175
176			m = self.routes.submapper(_api_path=path, _api_method=method,
177			conditions=conditions)
178			for transform in transforms[filter]:
179			m.connect(None, re.sub(filter, transform, path), **connect_kw)
180
181			for route in sorted(self.routes.matchlist, key=lambda r: r.routepath):
182			LOG.debug('Route registered: %+6s %s', route.conditions['method'][0], route.routepath)
183
184			def match(self, req):
185			path = req.path
186
187			if len(path) > 1 and path.endswith('/'):
188			path = path[:-1]
189
190			match = self.routes.match(path, req.environ)
191
192			if match is None:
193			raise NotFoundException('No route matches "%s" path' % req.path)
194
195			# To account for situation when match may return multiple values
196			try:
197			path_vars = match[0]
198			except KeyError:
199			path_vars = match
200
201			path = path_vars.pop('_api_path')
202			method = path_vars.pop('_api_method')
203			endpoint = self.spec['paths'][path][method]
204
205			return endpoint, path_vars
206
207			def __call__(self, req):
208			"""
209			The method is invoked on every request and shows the lifecycle of the request received from
210			the middleware.
211
212			Although some middleware may use parts of the API spec, it is safe to assume that if you're
213			looking for the particular spec property handler, it's most likely a part of this method.
214
215			At the time of writing, the only property being utilized by middleware was `x-log-result`.
216			"""
217			endpoint, path_vars = self.match(req)
218
219			context = copy.copy(getattr(self, 'mock_context', {}))
220
221			# Handle security
222			if 'security' in endpoint:
223			security = endpoint.get('security')
224			else:
225			security = self.spec.get('security', [])
226
227			if self.auth and security:
228			try:
229			auth_resp = None
230			security_definitions = self.spec.get('securityDefinitions', {})
231			for statement in security:
232			declaration, options = statement.copy().popitem()
233			definition = security_definitions[declaration]
234
235			if definition['type'] == 'apiKey':
236			if definition['in'] == 'header':
237			token = req.headers.get(definition['name'])
238			elif definition['in'] == 'query':
239			token = req.GET.get(definition['name'])
240			else:
241			token = None
242
243			if token:
244			if auth_resp:
245			raise auth_exc.MultipleAuthSourcesError(
246			'Only one of Token or API key expected.')
247
248			auth_func = op_resolver(definition['x-operationId'])
249			auth_resp = auth_func(token)
250
251			context['user'] = User.get_by_name(auth_resp.user)
252
253			if 'user' not in context:
254			raise auth_exc.NoAuthSourceProvidedError('One of Token or API key required.')
255			except (auth_exc.NoAuthSourceProvidedError,
256			auth_exc.MultipleAuthSourcesError) as e:
257			LOG.error(str(e))
258			return abort_unauthorized(str(e))
259			except auth_exc.TokenNotProvidedError as e:
260			LOG.exception('Token is not provided.')
261			return abort_unauthorized(str(e))
262			except auth_exc.TokenNotFoundError as e:
263			LOG.exception('Token is not found.')
264			return abort_unauthorized(str(e))
265			except auth_exc.TokenExpiredError as e:
266			LOG.exception('Token has expired.')
267			return abort_unauthorized(str(e))
268			except auth_exc.ApiKeyNotProvidedError as e:
269			LOG.exception('API key is not provided.')
270			return abort_unauthorized(str(e))
271			except auth_exc.ApiKeyNotFoundError as e:
272			LOG.exception('API key is not found.')
273			return abort_unauthorized(str(e))
274			except auth_exc.ApiKeyDisabledError as e:
275			LOG.exception('API key is disabled.')
276			return abort_unauthorized(str(e))
277
278			if cfg.CONF.rbac.enable:
279			user_db = context['user']
280
281			permission_type = endpoint.get('x-permissions', None)
282			if permission_type:
283			resolver = resolvers.get_resolver_for_permission_type(permission_type)
284			has_permission = resolver.user_has_permission(user_db, permission_type)
285
286			if not has_permission:
287			raise rbac_exc.ResourceTypeAccessDeniedError(user_db,
288			permission_type)
289
290			# Collect parameters
291			kw = {}
292			for param in endpoint.get('parameters', []) + endpoint.get('x-parameters', []):
293			name = param['name']
294			argument_name = param.get('x-as', None) or name
295			source = param['in']
296			default = param.get('default', None)
297
298			# Collecting params from different sources
299			if source == 'query':
300			kw[argument_name] = req.GET.get(name, default)
301			elif source == 'path':
302			kw[argument_name] = path_vars[name]
303			elif source == 'header':
304			kw[argument_name] = req.headers.get(name, default)
305			elif source == 'formData':
306			kw[argument_name] = req.POST.get(name, default)
307			elif source == 'environ':
308			kw[argument_name] = req.environ.get(name.upper(), default)
309			elif source == 'context':
310			kw[argument_name] = context.get(name, default)
311			elif source == 'request':
312			kw[argument_name] = getattr(req, name)
313			elif source == 'body':
314			if req.body:
315			content_type = req.headers.get('Content-Type', 'application/json')
316			content_type = parse_content_type_header(content_type=content_type)[0]
317			schema = param['schema']
318
319			try:
320			if content_type == 'application/json':
321			data = req.json
322			elif content_type == 'text/plain':
323			data = req.body
324			elif content_type in ['application/x-www-form-urlencoded',
325			'multipart/form-data']:
326			data = urlparse.parse_qs(req.body)
327			else:
328			raise ValueError('Unsupported Content-Type: "%s"' % (content_type))
329			except Exception as e:
330			detail = 'Failed to parse request body: %s' % str(e)
331			raise exc.HTTPBadRequest(detail=detail)
332
333			try:
334			CustomValidator(schema, resolver=self.spec_resolver).validate(data)
335			except (jsonschema.ValidationError, ValueError) as e:
336			raise exc.HTTPBadRequest(detail=e.message,
337			comment=traceback.format_exc())
338
339			if content_type == 'text/plain':
340			kw[argument_name] = data
341			else:
342			class Body(object):
343			def __init__(self, **entries):
344			self.__dict__.update(entries)
345
346			ref = schema.get('$ref', None)
347			if ref:
348			with self.spec_resolver.resolving(ref) as resolved:
349			schema = resolved
350
351			if 'x-api-model' in schema:
352			Model = op_resolver(schema['x-api-model'])
353			else:
354			Model = Body
355
356			kw[argument_name] = Model(**data)
357			else:
358			kw[argument_name] = None
359
360			# Making sure all required params are present
361			required = param.get('required', False)
362			if required and kw[argument_name] is None:
363			detail = 'Required parameter "%s" is missing' % name
364			raise exc.HTTPBadRequest(detail=detail)
365
366			# Validating and casting param types
367			type = param.get('type', None)
			0 ignored issues – show Bug Best Practice introduced 2017-03-03 08:54 UTC by Report Bug Copy Issue Report This seems to re-define the built-in `type`. It is generally discouraged to redefine built-ins as this makes code very hard to read. Loading history...
368			if kw[argument_name] is not None:
369			if type == 'boolean':
370			positive = ('true', '1', 'yes', 'y')
371			negative = ('false', '0', 'no', 'n')
372
373			if str(kw[argument_name]).lower() not in positive + negative:
374			detail = 'Parameter "%s" is not of type boolean' % argument_name
375			raise exc.HTTPBadRequest(detail=detail)
376
377			kw[argument_name] = str(kw[argument_name]).lower() in positive
378			elif type == 'integer':
379			regex = r'^-?[0-9]+$'
380
381			if not re.search(regex, str(kw[argument_name])):
382			detail = 'Parameter "%s" is not of type integer' % argument_name
383			raise exc.HTTPBadRequest(detail=detail)
384
385			kw[argument_name] = int(kw[argument_name])
386			elif type == 'number':
387			regex = r'^[+-]?(\d+(\.\d*)?\|\.\d+)([eE][+-]?\d+)?$'
388
389			if not re.search(regex, str(kw[argument_name])):
390			detail = 'Parameter "%s" is not of type float' % argument_name
391			raise exc.HTTPBadRequest(detail=detail)
392
393			kw[argument_name] = float(kw[argument_name])
394
395			# Call the controller
396			func = op_resolver(endpoint['operationId'])
397			resp = func(**kw)
398
399			# Handle response
400			if resp is None:
401			resp = Response()
402
403			if not hasattr(resp, '__call__'):
404			resp = Response(json=resp)
405
406			responses = endpoint.get('responses', {})
407			response_spec = responses.get(str(resp.status_code), responses.get('default', None))
408
409			if response_spec and 'schema' in response_spec:
410			try:
411			validator = CustomValidator(response_spec['schema'], resolver=self.spec_resolver)
412			validator.validate(resp.json)
413			except (jsonschema.ValidationError, ValueError):
414			LOG.exception('Response validation failed.')
415			resp.headers.add('Warning', '199 OpenAPI "Response validation failed"')
416
417			return resp
418
419			def as_wsgi(self, environ, start_response):
420			"""
421			Converts WSGI request to webob.Request and initiates the response returned by controller.
422			"""
423			req = Request(environ)
424			resp = self(req)
425			return resp(environ, start_response)
426

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