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How to use get_target_resource_details method in localstack

Best Python code snippet using localstack_python
apigateway_listener.py
Source:apigateway_listener.py
...374    method = invocation_context.method375    headers = invocation_context.headers376    # run gateway authorizers for this request377    authorize_invocation(invocation_context)378    extracted_path, resource = get_target_resource_details(invocation_context)379    if not resource:380        return make_error_response("Unable to find path %s" % invocation_context.path, 404)381    # validate request382    validator = RequestValidator(invocation_context, aws_stack.connect_to_service("apigateway"))383    if not validator.is_request_valid():384        return make_error_response("Invalid request body", 400)385    api_key_required = resource.get("resourceMethods", {}).get(method, {}).get("apiKeyRequired")386    if not is_api_key_valid(api_key_required, headers, invocation_context.stage):387        return make_error_response("Access denied - invalid API key", 403)388    integrations = resource.get("resourceMethods", {})389    integration = integrations.get(method, {})390    if not integration:391        # HttpMethod: '*'392        # ResourcePath: '/*' - produces 'X-AMAZON-APIGATEWAY-ANY-METHOD'393        integration = integrations.get("ANY", {}) or integrations.get(394            "X-AMAZON-APIGATEWAY-ANY-METHOD", {}395        )396    integration = integration.get("methodIntegration")397    if not integration:398        if method == "OPTIONS" and "Origin" in headers:399            # default to returning CORS headers if this is an OPTIONS request400            return get_cors_response(headers)401        return make_error_response(402            "Unable to find integration for: %s %s (%s)" % (method, invocation_path, raw_path),403            404,404        )405    res_methods = resource.get("resourceMethods", {})406    meth_integration = res_methods.get(method, {}).get("methodIntegration", {})407    int_responses = meth_integration.get("integrationResponses", {})408    response_templates = int_responses.get("200", {}).get("responseTemplates", {})409    # update fields in invocation context, then forward request to next handler410    invocation_context.resource = resource411    invocation_context.resource_path = extracted_path412    invocation_context.response_templates = response_templates413    invocation_context.integration = integration414    return invoke_rest_api_integration(invocation_context)415def invoke_rest_api_integration(invocation_context: ApiInvocationContext):416    try:417        response = invoke_rest_api_integration_backend(invocation_context)418        # TODO remove this setter once all the integrations are migrated to the new response419        #  handling420        invocation_context.response = response421        response = apply_response_parameters(invocation_context)422        return response423    except Exception as e:424        msg = f"Error invoking integration for API Gateway ID '{invocation_context.api_id}': {e}"425        LOG.exception(msg)426        return make_error_response(msg, 400)427# TODO: refactor this to have a class per integration type to make it easy to428# test the encapsulated logic429def invoke_rest_api_integration_backend(invocation_context: ApiInvocationContext):430    # define local aliases from invocation context431    invocation_path = invocation_context.path_with_query_string432    method = invocation_context.method433    data = invocation_context.data434    headers = invocation_context.headers435    api_id = invocation_context.api_id436    stage = invocation_context.stage437    resource_path = invocation_context.resource_path438    response_templates = invocation_context.response_templates439    integration = invocation_context.integration440    # extract integration type and path parameters441    relative_path, query_string_params = extract_query_string_params(path=invocation_path)442    integration_type_orig = integration.get("type") or integration.get("integrationType") or ""443    integration_type = integration_type_orig.upper()444    uri = integration.get("uri") or integration.get("integrationUri") or ""445    # XXX we need replace the internal Authorization header with an Authorization header set from446    # the customer, even if it's empty that's what's expected in the integration.447    custom_auth_header = invocation_context.headers.pop(HEADER_LOCALSTACK_AUTHORIZATION, "")448    invocation_context.headers["Authorization"] = custom_auth_header449    try:450        path_params = extract_path_params(path=relative_path, extracted_path=resource_path)451        invocation_context.path_params = path_params452    except Exception:453        path_params = {}454    if (uri.startswith("arn:aws:apigateway:") and ":lambda:path" in uri) or uri.startswith(455        "arn:aws:lambda"456    ):457        if integration_type in ["AWS", "AWS_PROXY"]:458            func_arn = uri459            if ":lambda:path" in uri:460                func_arn = (461                    uri.split(":lambda:path")[1].split("functions/")[1].split("/invocations")[0]462                )463            invocation_context.context = get_event_request_context(invocation_context)464            invocation_context.stage_variables = helpers.get_stage_variables(invocation_context)465            if invocation_context.authorizer_type:466                authorizer_context = {467                    invocation_context.authorizer_type: invocation_context.auth_context468                }469                invocation_context.context["authorizer"] = authorizer_context470            request_templates = RequestTemplates()471            payload = request_templates.render(invocation_context)472            # TODO: change this signature to InvocationContext as well!473            result = lambda_api.process_apigateway_invocation(474                func_arn,475                relative_path,476                payload,477                stage,478                api_id,479                headers,480                is_base64_encoded=invocation_context.is_data_base64_encoded,481                path_params=path_params,482                query_string_params=query_string_params,483                method=method,484                resource_path=resource_path,485                request_context=invocation_context.context,486                stage_variables=invocation_context.stage_variables,487            )488            if isinstance(result, FlaskResponse):489                response = flask_to_requests_response(result)490            elif isinstance(result, Response):491                response = result492            else:493                response = LambdaResponse()494                parsed_result = (495                    result if isinstance(result, dict) else json.loads(str(result or "{}"))496                )497                parsed_result = common.json_safe(parsed_result)498                parsed_result = {} if parsed_result is None else parsed_result499                response.status_code = int(parsed_result.get("statusCode", 200))500                parsed_headers = parsed_result.get("headers", {})501                if parsed_headers is not None:502                    response.headers.update(parsed_headers)503                try:504                    result_body = parsed_result.get("body")505                    if isinstance(result_body, dict):506                        response._content = json.dumps(result_body)507                    else:508                        body_bytes = to_bytes(to_str(result_body or ""))509                        if parsed_result.get("isBase64Encoded", False):510                            body_bytes = base64.b64decode(body_bytes)511                        response._content = body_bytes512                except Exception as e:513                    LOG.warning("Couldn't set Lambda response content: %s", e)514                    response._content = "{}"515                update_content_length(response)516                response.multi_value_headers = parsed_result.get("multiValueHeaders") or {}517            # apply custom response template518            invocation_context.response = response519            response_templates = ResponseTemplates()520            response_templates.render(invocation_context)521            invocation_context.response.headers["Content-Length"] = str(len(response.content or ""))522            return invocation_context.response523        raise Exception(524            f'API Gateway integration type "{integration_type}", action "{uri}", method "{method}"'525        )526    elif integration_type == "AWS":527        if "kinesis:action/" in uri:528            if uri.endswith("kinesis:action/PutRecord"):529                target = kinesis_listener.ACTION_PUT_RECORD530            elif uri.endswith("kinesis:action/PutRecords"):531                target = kinesis_listener.ACTION_PUT_RECORDS532            elif uri.endswith("kinesis:action/ListStreams"):533                target = kinesis_listener.ACTION_LIST_STREAMS534            else:535                LOG.info(536                    f"Unexpected API Gateway integration URI '{uri}' for integration type {integration_type}",537                )538                target = ""539            try:540                invocation_context.context = get_event_request_context(invocation_context)541                invocation_context.stage_variables = helpers.get_stage_variables(invocation_context)542                request_templates = RequestTemplates()543                payload = request_templates.render(invocation_context)544            except Exception as e:545                LOG.warning("Unable to convert API Gateway payload to str", e)546                raise547            # forward records to target kinesis stream548            headers = aws_stack.mock_aws_request_headers(549                service="kinesis", region_name=invocation_context.region_name550            )551            headers["X-Amz-Target"] = target552            result = common.make_http_request(553                url=config.service_url("kineses"), data=payload, headers=headers, method="POST"554            )555            # apply response template556            invocation_context.response = result557            response_templates = ResponseTemplates()558            response_templates.render(invocation_context)559            return invocation_context.response560        elif "states:action/" in uri:561            action = uri.split("/")[-1]562            if APPLICATION_JSON in integration.get("requestTemplates", {}):563                request_templates = RequestTemplates()564                payload = request_templates.render(invocation_context)565                payload = json.loads(payload)566            else:567                # XXX decoding in py3 sounds wrong, this actually might break568                payload = json.loads(data.decode("utf-8"))569            client = aws_stack.connect_to_service("stepfunctions")570            if isinstance(payload.get("input"), dict):571                payload["input"] = json.dumps(payload["input"])572            # Hot fix since step functions local package responses: Unsupported Operation: 'StartSyncExecution'573            method_name = (574                camel_to_snake_case(action) if action != "StartSyncExecution" else "start_execution"575            )576            try:577                method = getattr(client, method_name)578            except AttributeError:579                msg = "Invalid step function action: %s" % method_name580                LOG.error(msg)581                return make_error_response(msg, 400)582            result = method(**payload)583            result = json_safe({k: result[k] for k in result if k not in "ResponseMetadata"})584            response = requests_response(585                content=result,586                headers=aws_stack.mock_aws_request_headers(),587            )588            if action == "StartSyncExecution":589                # poll for the execution result and return it590                result = await_sfn_execution_result(result["executionArn"])591                result_status = result.get("status")592                if result_status != "SUCCEEDED":593                    return make_error_response(594                        "StepFunctions execution %s failed with status '%s'"595                        % (result["executionArn"], result_status),596                        500,597                    )598                result = json_safe(result)599                response = requests_response(content=result)600            # apply response templates601            invocation_context.response = response602            response_templates = ResponseTemplates()603            response_templates.render(invocation_context)604            # response = apply_request_response_templates(605            #     response, response_templates, content_type=APPLICATION_JSON606            # )607            return response608        # https://docs.aws.amazon.com/apigateway/api-reference/resource/integration/609        elif ("s3:path/" in uri or "s3:action/" in uri) and method == "GET":610            s3 = aws_stack.connect_to_service("s3")611            uri = apply_request_parameters(612                uri,613                integration=integration,614                path_params=path_params,615                query_params=query_string_params,616            )617            uri_match = re.match(TARGET_REGEX_PATH_S3_URI, uri) or re.match(618                TARGET_REGEX_ACTION_S3_URI, uri619            )620            if uri_match:621                bucket, object_key = uri_match.group("bucket", "object")622                LOG.debug("Getting request for bucket %s object %s", bucket, object_key)623                try:624                    object = s3.get_object(Bucket=bucket, Key=object_key)625                except s3.exceptions.NoSuchKey:626                    msg = "Object %s not found" % object_key627                    LOG.debug(msg)628                    return make_error_response(msg, 404)629                headers = aws_stack.mock_aws_request_headers(service="s3")630                if object.get("ContentType"):631                    headers["Content-Type"] = object["ContentType"]632                # stream used so large files do not fill memory633                response = request_response_stream(stream=object["Body"], headers=headers)634                return response635            else:636                msg = "Request URI does not match s3 specifications"637                LOG.warning(msg)638                return make_error_response(msg, 400)639        if method == "POST":640            if uri.startswith("arn:aws:apigateway:") and ":sqs:path" in uri:641                template = integration["requestTemplates"][APPLICATION_JSON]642                account_id, queue = uri.split("/")[-2:]643                region_name = uri.split(":")[3]644                if "GetQueueUrl" in template or "CreateQueue" in template:645                    request_templates = RequestTemplates()646                    payload = request_templates.render(invocation_context)647                    new_request = f"{payload}&QueueName={queue}"648                else:649                    request_templates = RequestTemplates()650                    payload = request_templates.render(invocation_context)651                    queue_url = f"{config.get_edge_url()}/{account_id}/{queue}"652                    new_request = f"{payload}&QueueUrl={queue_url}"653                headers = aws_stack.mock_aws_request_headers(service="sqs", region_name=region_name)654                url = urljoin(config.service_url("sqs"), f"{TEST_AWS_ACCOUNT_ID}/{queue}")655                result = common.make_http_request(656                    url, method="POST", headers=headers, data=new_request657                )658                return result659            elif uri.startswith("arn:aws:apigateway:") and ":sns:path" in uri:660                invocation_context.context = get_event_request_context(invocation_context)661                invocation_context.stage_variables = helpers.get_stage_variables(invocation_context)662                integration_response = SnsIntegration().invoke(invocation_context)663                return apply_request_response_templates(664                    integration_response, response_templates, content_type=APPLICATION_JSON665                )666        raise Exception(667            'API Gateway AWS integration action URI "%s", method "%s" not yet implemented'668            % (uri, method)669        )670    elif integration_type == "AWS_PROXY":671        if uri.startswith("arn:aws:apigateway:") and ":dynamodb:action" in uri:672            # arn:aws:apigateway:us-east-1:dynamodb:action/PutItem&Table=MusicCollection673            table_name = uri.split(":dynamodb:action")[1].split("&Table=")[1]674            action = uri.split(":dynamodb:action")[1].split("&Table=")[0]675            if "PutItem" in action and method == "PUT":676                response_template = response_templates.get("application/json")677                if response_template is None:678                    msg = "Invalid response template defined in integration response."679                    LOG.info("%s Existing: %s", msg, response_templates)680                    return make_error_response(msg, 404)681                response_template = json.loads(response_template)682                if response_template["TableName"] != table_name:683                    msg = "Invalid table name specified in integration response template."684                    return make_error_response(msg, 404)685                dynamo_client = aws_stack.connect_to_resource("dynamodb")686                table = dynamo_client.Table(table_name)687                event_data = {}688                data_dict = json.loads(data)689                for key, _ in response_template["Item"].items():690                    event_data[key] = data_dict[key]691                table.put_item(Item=event_data)692                response = requests_response(event_data)693                return response694        else:695            raise Exception(696                'API Gateway action uri "%s", integration type %s not yet implemented'697                % (uri, integration_type)698            )699    elif integration_type in ["HTTP_PROXY", "HTTP"]:700        if ":servicediscovery:" in uri:701            # check if this is a servicediscovery integration URI702            client = aws_stack.connect_to_service("servicediscovery")703            service_id = uri.split("/")[-1]704            instances = client.list_instances(ServiceId=service_id)["Instances"]705            instance = (instances or [None])[0]706            if instance and instance.get("Id"):707                uri = "http://%s/%s" % (instance["Id"], invocation_path.lstrip("/"))708        # apply custom request template709        invocation_context.context = get_event_request_context(invocation_context)710        invocation_context.stage_variables = helpers.get_stage_variables(invocation_context)711        request_templates = RequestTemplates()712        payload = request_templates.render(invocation_context)713        if isinstance(payload, dict):714            payload = json.dumps(payload)715        uri = apply_request_parameters(716            uri, integration=integration, path_params=path_params, query_params=query_string_params717        )718        result = requests.request(method=method, url=uri, data=payload, headers=headers)719        # apply custom response template720        invocation_context.response = result721        response_templates = ResponseTemplates()722        response_templates.render(invocation_context)723        return invocation_context.response724    elif integration_type == "MOCK":725        # TODO: apply tell don't ask principle inside ResponseTemplates or InvocationContext726        invocation_context.stage_variables = helpers.get_stage_variables(invocation_context)727        invocation_context.response = requests_response({})728        response_templates = ResponseTemplates()729        response_templates.render(invocation_context)730        return invocation_context.response731    if method == "OPTIONS":732        # fall back to returning CORS headers if this is an OPTIONS request733        return get_cors_response(headers)734    raise Exception(735        'API Gateway integration type "%s", method "%s", URI "%s" not yet implemented'736        % (integration_type, method, uri)737    )738def get_target_resource_details(invocation_context: ApiInvocationContext) -> Tuple[str, Dict]:739    """Look up and return the API GW resource (path pattern + resource dict) for the given invocation context."""740    path_map = helpers.get_rest_api_paths(741        rest_api_id=invocation_context.api_id, region_name=invocation_context.region_name742    )743    relative_path = invocation_context.invocation_path744    try:745        extracted_path, resource = get_resource_for_path(path=relative_path, path_map=path_map)746        invocation_context.resource = resource747        return extracted_path, resource748    except Exception:749        return None, None750def get_target_resource_method(invocation_context: ApiInvocationContext) -> Optional[Dict]:751    """Look up and return the API GW resource method for the given invocation context."""752    _, resource = get_target_resource_details(invocation_context)753    if not resource:754        return None755    methods = resource.get("resourceMethods") or {}756    method_name = invocation_context.method.upper()757    return methods.get(method_name) or methods.get("ANY")758def get_event_request_context(invocation_context: ApiInvocationContext):759    method = invocation_context.method760    path = invocation_context.path761    headers = invocation_context.headers762    integration_uri = invocation_context.integration_uri763    resource_path = invocation_context.resource_path764    resource_id = invocation_context.resource_id765    set_api_id_stage_invocation_path(invocation_context)766    relative_path, query_string_params = extract_query_string_params(...
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