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How to use _build_name_to_xml_node method in localstack

Best Python code snippet using localstack_python
parsers.py
Source:parsers.py
...251        return super(BaseXMLResponseParser, self)._handle_list(shape, node)252    def _handle_structure(self, shape, node):253        parsed = {}254        members = shape.members255        xml_dict = self._build_name_to_xml_node(node)256        for member_name in members:257            member_shape = members[member_name]258            if 'location' in member_shape.serialization:259                # All members with locations have already been handled,260                # so we don't need to parse these members.261                continue262            xml_name = self._member_key_name(member_shape, member_name)263            member_node = xml_dict.get(xml_name)264            if member_node is not None:265                parsed[member_name] = self._parse_shape(266                    member_shape, member_node)267            elif member_shape.serialization.get('xmlAttribute'):268                attribs = {}269                location_name = member_shape.serialization['name']270                for key, value in node.attrib.items():271                    new_key = self._namespace_re.sub(272                        location_name.split(':')[0] + ':', key)273                    attribs[new_key] = value274                if location_name in attribs:275                    parsed[member_name] = attribs[location_name]276        return parsed277    def _member_key_name(self, shape, member_name):278        # This method is needed because we have to special case flattened list279        # with a serialization name.  If this is the case we use the280        # locationName from the list's member shape as the key name for the281        # surrounding structure.282        if shape.type_name == 'list' and shape.serialization.get('flattened'):283            list_member_serialized_name = shape.member.serialization.get(284                'name')285            if list_member_serialized_name is not None:286                return list_member_serialized_name287        serialized_name = shape.serialization.get('name')288        if serialized_name is not None:289            return serialized_name290        return member_name291    def _build_name_to_xml_node(self, parent_node):292        # If the parent node is actually a list. We should not be trying293        # to serialize it to a dictionary. Instead, return the first element294        # in the list.295        if isinstance(parent_node, list):296            return self._build_name_to_xml_node(parent_node[0])297        xml_dict = {}298        for item in parent_node:299            key = self._node_tag(item)300            if key in xml_dict:301                # If the key already exists, the most natural302                # way to handle this is to aggregate repeated303                # keys into a single list.304                # <foo>1</foo><foo>2</foo> -> {'foo': [Node(1), Node(2)]}305                if isinstance(xml_dict[key], list):306                    xml_dict[key].append(item)307                else:308                    # Convert from a scalar to a list.309                    xml_dict[key] = [xml_dict[key], item]310            else:311                xml_dict[key] = item312        return xml_dict313    def _parse_xml_string_to_dom(self, xml_string):314        try:315            parser = xml.etree.cElementTree.XMLParser(316                target=xml.etree.cElementTree.TreeBuilder(),317                encoding=self.DEFAULT_ENCODING)318            parser.feed(xml_string)319            root = parser.close()320        except XMLParseError as e:321            raise ResponseParserError(322                "Unable to parse response (%s), "323                "invalid XML received:\n%s" % (e, xml_string))324        return root325    def _replace_nodes(self, parsed):326        for key, value in parsed.items():327            if value.getchildren():328                sub_dict = self._build_name_to_xml_node(value)329                parsed[key] = self._replace_nodes(sub_dict)330            else:331                parsed[key] = value.text332        return parsed333    @_text_content334    def _handle_boolean(self, shape, text):335        if text == 'true':336            return True337        else:338            return False339    @_text_content340    def _handle_float(self, shape, text):341        return float(text)342    @_text_content343    def _handle_timestamp(self, shape, text):344        return self._timestamp_parser(text)345    @_text_content346    def _handle_integer(self, shape, text):347        return int(text)348    @_text_content349    def _handle_string(self, shape, text):350        return text351    @_text_content352    def _handle_blob(self, shape, text):353        return self._blob_parser(text)354    _handle_character = _handle_string355    _handle_double = _handle_float356    _handle_long = _handle_integer357class QueryParser(BaseXMLResponseParser):358    def _do_error_parse(self, response, shape):359        xml_contents = response['body']360        root = self._parse_xml_string_to_dom(xml_contents)361        parsed = self._build_name_to_xml_node(root)362        self._replace_nodes(parsed)363        # Once we've converted xml->dict, we need to make one or two364        # more adjustments to extract nested errors and to be consistent365        # with ResponseMetadata for non-error responses:366        # 1. {"Errors": {"Error": {...}}} -> {"Error": {...}}367        # 2. {"RequestId": "id"} -> {"ResponseMetadata": {"RequestId": "id"}}368        if 'Errors' in parsed:369            parsed.update(parsed.pop('Errors'))370        if 'RequestId' in parsed:371            parsed['ResponseMetadata'] = {'RequestId': parsed.pop('RequestId')}372        return parsed373    def _do_parse(self, response, shape):374        xml_contents = response['body']375        root = self._parse_xml_string_to_dom(xml_contents)376        parsed = {}377        if shape is not None:378            start = root379            if 'resultWrapper' in shape.serialization:380                start = self._find_result_wrapped_shape(381                    shape.serialization['resultWrapper'],382                    root)383            parsed = self._parse_shape(shape, start)384        self._inject_response_metadata(root, parsed)385        return parsed386    def _find_result_wrapped_shape(self, element_name, xml_root_node):387        mapping = self._build_name_to_xml_node(xml_root_node)388        return mapping[element_name]389    def _inject_response_metadata(self, node, inject_into):390        mapping = self._build_name_to_xml_node(node)391        child_node = mapping.get('ResponseMetadata')392        if child_node is not None:393            sub_mapping = self._build_name_to_xml_node(child_node)394            for key, value in sub_mapping.items():395                sub_mapping[key] = value.text396            inject_into['ResponseMetadata'] = sub_mapping397class EC2QueryParser(QueryParser):398    def _inject_response_metadata(self, node, inject_into):399        mapping = self._build_name_to_xml_node(node)400        child_node = mapping.get('requestId')401        if child_node is not None:402            inject_into['ResponseMetadata'] = {'RequestId': child_node.text}403    def _do_error_parse(self, response, shape):404        # EC2 errors look like:405        # <Response>406        #   <Errors>407        #     <Error>408        #       <Code>InvalidInstanceID.Malformed</Code>409        #       <Message>Invalid id: "1343124"</Message>410        #     </Error>411        #   </Errors>412        #   <RequestID>12345</RequestID>413        # </Response>414        # This is different from QueryParser in that it's RequestID,415        # not RequestId416        original = super(EC2QueryParser, self)._do_error_parse(response, shape)417        original['ResponseMetadata'] = {418            'RequestId': original.pop('RequestID')419        }420        return original421class BaseJSONParser(ResponseParser):422    def _handle_structure(self, shape, value):423        member_shapes = shape.members424        if value is None:425            # If the comes across the wire as "null" (None in python),426            # we should be returning this unchanged, instead of as an427            # empty dict.428            return None429        final_parsed = {}430        for member_name in member_shapes:431            member_shape = member_shapes[member_name]432            json_name = member_shape.serialization.get('name', member_name)433            raw_value = value.get(json_name)434            if raw_value is not None:435                final_parsed[member_name] = self._parse_shape(436                    member_shapes[member_name],437                    raw_value)438        return final_parsed439    def _handle_map(self, shape, value):440        parsed = {}441        key_shape = shape.key442        value_shape = shape.value443        for key, value in value.items():444            actual_key = self._parse_shape(key_shape, key)445            actual_value = self._parse_shape(value_shape, value)446            parsed[actual_key] = actual_value447        return parsed448    def _handle_blob(self, shape, value):449        return self._blob_parser(value)450    def _handle_timestamp(self, shape, value):451        return self._timestamp_parser(value)452    def _do_error_parse(self, response, shape):453        body = self._parse_body_as_json(response['body'])454        error = {"Error": {"Message": '', "Code": ''}, "ResponseMetadata": {}}455        # Error responses can have slightly different structures for json.456        # The basic structure is:457        #458        # {"__type":"ConnectClientException",459        #  "message":"The error message."}460        # The error message can either come in the 'message' or 'Message' key461        # so we need to check for both.462        error['Error']['Message'] = body.get('message',463                                             body.get('Message', ''))464        code = body.get('__type')465        if code is not None:466            # code has a couple forms as well:467            # * "com.aws.dynamodb.vAPI#ProvisionedThroughputExceededException"468            # * "ResourceNotFoundException"469            if '#' in code:470                code = code.rsplit('#', 1)[1]471            error['Error']['Code'] = code472        self._inject_response_metadata(error, response['headers'])473        return error474    def _inject_response_metadata(self, parsed, headers):475        if 'x-amzn-requestid' in headers:476            parsed.setdefault('ResponseMetadata', {})['RequestId'] = (477                headers['x-amzn-requestid'])478    def _parse_body_as_json(self, body_contents):479        if not body_contents:480            return {}481        body = body_contents.decode(self.DEFAULT_ENCODING)482        original_parsed = json.loads(body)483        return original_parsed484class JSONParser(BaseJSONParser):485    """Response parse for the "json" protocol."""486    def _do_parse(self, response, shape):487        # The json.loads() gives us the primitive JSON types,488        # but we need to traverse the parsed JSON data to convert489        # to richer types (blobs, timestamps, etc.490        parsed = {}491        if shape is not None:492            original_parsed = self._parse_body_as_json(response['body'])493            parsed = self._parse_shape(shape, original_parsed)494        self._inject_response_metadata(parsed, response['headers'])495        return parsed496class BaseRestParser(ResponseParser):497    def _do_parse(self, response, shape):498        final_parsed = {}499        final_parsed['ResponseMetadata'] = self._populate_response_metadata(500            response)501        if shape is None:502            return final_parsed503        member_shapes = shape.members504        self._parse_non_payload_attrs(response, shape,505                                      member_shapes, final_parsed)506        self._parse_payload(response, shape, member_shapes, final_parsed)507        return final_parsed508    def _populate_response_metadata(self, response):509        metadata = {}510        headers = response['headers']511        if 'x-amzn-requestid' in headers:512            metadata['RequestId'] = headers['x-amzn-requestid']513        elif 'x-amz-request-id' in headers:514            metadata['RequestId'] = headers['x-amz-request-id']515            # HostId is what it's called whenver this value is returned516            # in an XML response body, so to be consistent, we'll always517            # call is HostId.518            metadata['HostId'] = headers.get('x-amz-id-2', '')519        return metadata520    def _parse_payload(self, response, shape, member_shapes, final_parsed):521        if 'payload' in shape.serialization:522            # If a payload is specified in the output shape, then only that523            # shape is used for the body payload.524            payload_member_name = shape.serialization['payload']525            body_shape = member_shapes[payload_member_name]526            if body_shape.type_name in ['string', 'blob']:527                # This is a stream528                body = response['body']529                if isinstance(body, bytes):530                    body = body.decode(self.DEFAULT_ENCODING)531                final_parsed[payload_member_name] = body532            else:533                original_parsed = self._initial_body_parse(response['body'])534                final_parsed[payload_member_name] = self._parse_shape(535                    body_shape, original_parsed)536        else:537            original_parsed = self._initial_body_parse(response['body'])538            body_parsed = self._parse_shape(shape, original_parsed)539            final_parsed.update(body_parsed)540    def _parse_non_payload_attrs(self, response, shape,541                                 member_shapes, final_parsed):542        headers = response['headers']543        for name in member_shapes:544            member_shape = member_shapes[name]545            location = member_shape.serialization.get('location')546            if location is None:547                continue548            elif location == 'statusCode':549                final_parsed[name] = self._parse_shape(550                    member_shape, response['status_code'])551            elif location == 'headers':552                final_parsed[name] = self._parse_header_map(member_shape,553                                                            headers)554            elif location == 'header':555                header_name = member_shape.serialization.get('name', name)556                if header_name in headers:557                    final_parsed[name] = self._parse_shape(558                        member_shape, headers[header_name])559    def _parse_header_map(self, shape, headers):560        # Note that headers are case insensitive, so we .lower()561        # all header names and header prefixes.562        parsed = {}563        prefix = shape.serialization.get('name', '').lower()564        for header_name in headers:565            if header_name.lower().startswith(prefix):566                # The key name inserted into the parsed hash567                # strips off the prefix.568                name = header_name[len(prefix):]569                parsed[name] = headers[header_name]570        return parsed571    def _initial_body_parse(self, body_contents):572        # This method should do the initial xml/json parsing of the573        # body.  We we still need to walk the parsed body in order574        # to convert types, but this method will do the first round575        # of parsing.576        raise NotImplementedError("_initial_body_parse")577class RestJSONParser(BaseRestParser, BaseJSONParser):578    def _initial_body_parse(self, body_contents):579        return self._parse_body_as_json(body_contents)580    def _do_error_parse(self, response, shape):581        error = super(RestJSONParser, self)._do_error_parse(response, shape)582        self._inject_error_code(error, response)583        return error584    def _inject_error_code(self, error, response):585        # The "Code" value can come from either a response586        # header or a value in the JSON body.587        body = self._initial_body_parse(response['body'])588        if 'x-amzn-errortype' in response['headers']:589            code = response['headers']['x-amzn-errortype']590            # Could be:591            # x-amzn-errortype: ValidationException:592            code = code.split(':')[0]593            error['Error']['Code'] = code594        elif 'code' in body or 'Code' in body:595            error['Error']['Code'] = body.get(596                'code', body.get('Code', ''))597class RestXMLParser(BaseRestParser, BaseXMLResponseParser):598    def _initial_body_parse(self, xml_string):599        if not xml_string:600            return xml.etree.cElementTree.Element('')601        return self._parse_xml_string_to_dom(xml_string)602    def _do_error_parse(self, response, shape):603        # We're trying to be service agnostic here, but S3 does have a slightly604        # different response structure for its errors compared to other605        # rest-xml serivces (route53/cloudfront).  We handle this by just606        # trying to parse both forms.607        # First:608        # <ErrorResponse xmlns="...">609        #   <Error>610        #     <Type>Sender</Type>611        #     <Code>InvalidInput</Code>612        #     <Message>Invalid resource type: foo</Message>613        #   </Error>614        #   <RequestId>request-id</RequestId>615        # </ErrorResponse>616        if response['body']:617            # If the body ends up being invalid xml, the xml parser should not618            # blow up. It should at least try to pull information about the619            # the error response from other sources like the HTTP status code.620            try:621                return self._parse_error_from_body(response)622            except ResponseParserError as e:623                LOG.debug(624                    'Exception caught when parsing error response body:',625                    exc_info=True)626        return self._parse_error_from_http_status(response)627    def _parse_error_from_http_status(self, response):628        return {629            'Error': {630                'Code': str(response['status_code']),631                'Message': six.moves.http_client.responses.get(632                    response['status_code'], ''),633            },634            'ResponseMetadata': {635                'RequestId': response['headers'].get('x-amz-request-id', ''),636                'HostId': response['headers'].get('x-amz-id-2', ''),637            }638        }639    def _parse_error_from_body(self, response):640        xml_contents = response['body']641        root = self._parse_xml_string_to_dom(xml_contents)642        parsed = self._build_name_to_xml_node(root)643        self._replace_nodes(parsed)644        if root.tag == 'Error':645            # This is an S3 error response.  First we'll populate the646            # response metadata.647            metadata = self._populate_response_metadata(response)648            # The RequestId and the HostId are already in the649            # ResponseMetadata, but are also duplicated in the XML650            # body.  We don't need these values in both places,651            # we'll just remove them from the parsed XML body.652            parsed.pop('RequestId', '')653            parsed.pop('HostId', '')654            return {'Error': parsed, 'ResponseMetadata': metadata}655        elif 'RequestId' in parsed:656            # Other rest-xml serivces:...
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