API Gateway examples using SDK for Python (Boto3)

class ApiGatewayToService:
    """
    Encapsulates Amazon API Gateway functions that are used to create a REST API that
    integrates with another AWS service.
    """

    def __init__(self, apig_client):
        """
        :param apig_client: A Boto3 API Gateway client.
        """
        self.apig_client = apig_client
        self.api_id = None
        self.root_id = None
        self.stage = None


    def deploy_api(self, stage_name):
        """
        Deploys a REST API. After a REST API is deployed, it can be called from any
        REST client, such as the Python Requests package or Postman.

        :param stage_name: The stage of the API to deploy, such as 'test'.
        :return: The base URL of the deployed REST API.
        """
        try:
            self.apig_client.create_deployment(
                restApiId=self.api_id, stageName=stage_name
            )
            self.stage = stage_name
            logger.info("Deployed stage %s.", stage_name)
        except ClientError:
            logger.exception("Couldn't deploy stage %s.", stage_name)
            raise
        else:
            return self.api_url()



    def api_url(self, resource=None):
        """
        Builds the REST API URL from its parts.

        :param resource: The resource path to append to the base URL.
        :return: The REST URL to the specified resource.
        """
        url = (
            f"https://{self.api_id}.execute-api.{self.apig_client.meta.region_name}"
            f".amazonaws.com/{self.stage}"
        )
        if resource is not None:
            url = f"{url}/{resource}"
        return url

class ApiGatewayToService:
    """
    Encapsulates Amazon API Gateway functions that are used to create a REST API that
    integrates with another AWS service.
    """

    def __init__(self, apig_client):
        """
        :param apig_client: A Boto3 API Gateway client.
        """
        self.apig_client = apig_client
        self.api_id = None
        self.root_id = None
        self.stage = None


    def add_rest_resource(self, parent_id, resource_path):
        """
        Adds a resource to a REST API.

        :param parent_id: The ID of the parent resource.
        :param resource_path: The path of the new resource, relative to the parent.
        :return: The ID of the new resource.
        """
        try:
            result = self.apig_client.create_resource(
                restApiId=self.api_id, parentId=parent_id, pathPart=resource_path
            )
            resource_id = result["id"]
            logger.info("Created resource %s.", resource_path)
        except ClientError:
            logger.exception("Couldn't create resource %s.", resource_path)
            raise
        else:
            return resource_id

class ApiGatewayToService:
    """
    Encapsulates Amazon API Gateway functions that are used to create a REST API that
    integrates with another AWS service.
    """

    def __init__(self, apig_client):
        """
        :param apig_client: A Boto3 API Gateway client.
        """
        self.apig_client = apig_client
        self.api_id = None
        self.root_id = None
        self.stage = None


    def create_rest_api(self, api_name):
        """
        Creates a REST API on API Gateway. The default API has only a root resource
        and no HTTP methods.

        :param api_name: The name of the API. This descriptive name is not used in
                         the API path.
        :return: The ID of the newly created API.
        """
        try:
            result = self.apig_client.create_rest_api(name=api_name)
            self.api_id = result["id"]
            logger.info("Created REST API %s with ID %s.", api_name, self.api_id)
        except ClientError:
            logger.exception("Couldn't create REST API %s.", api_name)
            raise

        try:
            result = self.apig_client.get_resources(restApiId=self.api_id)
            self.root_id = next(
                item for item in result["items"] if item["path"] == "/"
            )["id"]
        except ClientError:
            logger.exception("Couldn't get resources for API %s.", self.api_id)
            raise
        except StopIteration as err:
            logger.exception("No root resource found in API %s.", self.api_id)
            raise ValueError from err

        return self.api_id

class ApiGatewayToService:
    """
    Encapsulates Amazon API Gateway functions that are used to create a REST API that
    integrates with another AWS service.
    """

    def __init__(self, apig_client):
        """
        :param apig_client: A Boto3 API Gateway client.
        """
        self.apig_client = apig_client
        self.api_id = None
        self.root_id = None
        self.stage = None


    def delete_rest_api(self):
        """
        Deletes a REST API, including all of its resources and configuration.
        """
        try:
            self.apig_client.delete_rest_api(restApiId=self.api_id)
            logger.info("Deleted REST API %s.", self.api_id)
            self.api_id = None
        except ClientError:
            logger.exception("Couldn't delete REST API %s.", self.api_id)
            raise

class ApiGatewayToService:
    """
    Encapsulates Amazon API Gateway functions that are used to create a REST API that
    integrates with another AWS service.
    """

    def __init__(self, apig_client):
        """
        :param apig_client: A Boto3 API Gateway client.
        """
        self.apig_client = apig_client
        self.api_id = None
        self.root_id = None
        self.stage = None


    def create_rest_api(self, api_name):
        """
        Creates a REST API on API Gateway. The default API has only a root resource
        and no HTTP methods.

        :param api_name: The name of the API. This descriptive name is not used in
                         the API path.
        :return: The ID of the newly created API.
        """
        try:
            result = self.apig_client.create_rest_api(name=api_name)
            self.api_id = result["id"]
            logger.info("Created REST API %s with ID %s.", api_name, self.api_id)
        except ClientError:
            logger.exception("Couldn't create REST API %s.", api_name)
            raise

        try:
            result = self.apig_client.get_resources(restApiId=self.api_id)
            self.root_id = next(
                item for item in result["items"] if item["path"] == "/"
            )["id"]
        except ClientError:
            logger.exception("Couldn't get resources for API %s.", self.api_id)
            raise
        except StopIteration as err:
            logger.exception("No root resource found in API %s.", self.api_id)
            raise ValueError from err

        return self.api_id

class ApiGatewayToService:
    """
    Encapsulates Amazon API Gateway functions that are used to create a REST API that
    integrates with another AWS service.
    """

    def __init__(self, apig_client):
        """
        :param apig_client: A Boto3 API Gateway client.
        """
        self.apig_client = apig_client
        self.api_id = None
        self.root_id = None
        self.stage = None


    def get_rest_api_id(self, api_name):
        """
        Gets the ID of a REST API from its name by searching the list of REST APIs
        for the current account. Because names need not be unique, this returns only
        the first API with the specified name.

        :param api_name: The name of the API to look up.
        :return: The ID of the specified API.
        """
        try:
            rest_api = None
            paginator = self.apig_client.get_paginator("get_rest_apis")
            for page in paginator.paginate():
                rest_api = next(
                    (item for item in page["items"] if item["name"] == api_name), None
                )
                if rest_api is not None:
                    break
            self.api_id = rest_api["id"]
            logger.info("Found ID %s for API %s.", rest_api["id"], api_name)
        except ClientError:
            logger.exception("Couldn't find ID for API %s.", api_name)
            raise
        else:
            return rest_api["id"]

class ApiGatewayToService:
    """
    Encapsulates Amazon API Gateway functions that are used to create a REST API that
    integrates with another AWS service.
    """

    def __init__(self, apig_client):
        """
        :param apig_client: A Boto3 API Gateway client.
        """
        self.apig_client = apig_client
        self.api_id = None
        self.root_id = None
        self.stage = None


    def add_integration_method(
        self,
        resource_id,
        rest_method,
        service_endpoint_prefix,
        service_action,
        service_method,
        role_arn,
        mapping_template,
    ):
        """
        Adds an integration method to a REST API. An integration method is a REST
        resource, such as '/users', and an HTTP verb, such as GET. The integration
        method is backed by an AWS service, such as Amazon DynamoDB.

        :param resource_id: The ID of the REST resource.
        :param rest_method: The HTTP verb used with the REST resource.
        :param service_endpoint_prefix: The service endpoint that is integrated with
                                        this method, such as 'dynamodb'.
        :param service_action: The action that is called on the service, such as
                               'GetItem'.
        :param service_method: The HTTP method of the service request, such as POST.
        :param role_arn: The Amazon Resource Name (ARN) of a role that grants API
                         Gateway permission to use the specified action with the
                         service.
        :param mapping_template: A mapping template that is used to translate REST
                                 elements, such as query parameters, to the request
                                 body format required by the service.
        """
        service_uri = (
            f"arn:aws:apigateway:{self.apig_client.meta.region_name}"
            f":{service_endpoint_prefix}:action/{service_action}"
        )
        try:
            self.apig_client.put_method(
                restApiId=self.api_id,
                resourceId=resource_id,
                httpMethod=rest_method,
                authorizationType="NONE",
            )
            self.apig_client.put_method_response(
                restApiId=self.api_id,
                resourceId=resource_id,
                httpMethod=rest_method,
                statusCode="200",
                responseModels={"application/json": "Empty"},
            )
            logger.info("Created %s method for resource %s.", rest_method, resource_id)
        except ClientError:
            logger.exception(
                "Couldn't create %s method for resource %s.", rest_method, resource_id
            )
            raise

        try:
            self.apig_client.put_integration(
                restApiId=self.api_id,
                resourceId=resource_id,
                httpMethod=rest_method,
                type="AWS",
                integrationHttpMethod=service_method,
                credentials=role_arn,
                requestTemplates={"application/json": json.dumps(mapping_template)},
                uri=service_uri,
                passthroughBehavior="WHEN_NO_TEMPLATES",
            )
            self.apig_client.put_integration_response(
                restApiId=self.api_id,
                resourceId=resource_id,
                httpMethod=rest_method,
                statusCode="200",
                responseTemplates={"application/json": ""},
            )
            logger.info(
                "Created integration for resource %s to service URI %s.",
                resource_id,
                service_uri,
            )
        except ClientError:
            logger.exception(
                "Couldn't create integration for resource %s to service URI %s.",
                resource_id,
                service_uri,
            )
            raise

class ApiGatewayToService:
    """
    Encapsulates Amazon API Gateway functions that are used to create a REST API that
    integrates with another AWS service.
    """

    def __init__(self, apig_client):
        """
        :param apig_client: A Boto3 API Gateway client.
        """
        self.apig_client = apig_client
        self.api_id = None
        self.root_id = None
        self.stage = None


    def add_integration_method(
        self,
        resource_id,
        rest_method,
        service_endpoint_prefix,
        service_action,
        service_method,
        role_arn,
        mapping_template,
    ):
        """
        Adds an integration method to a REST API. An integration method is a REST
        resource, such as '/users', and an HTTP verb, such as GET. The integration
        method is backed by an AWS service, such as Amazon DynamoDB.

        :param resource_id: The ID of the REST resource.
        :param rest_method: The HTTP verb used with the REST resource.
        :param service_endpoint_prefix: The service endpoint that is integrated with
                                        this method, such as 'dynamodb'.
        :param service_action: The action that is called on the service, such as
                               'GetItem'.
        :param service_method: The HTTP method of the service request, such as POST.
        :param role_arn: The Amazon Resource Name (ARN) of a role that grants API
                         Gateway permission to use the specified action with the
                         service.
        :param mapping_template: A mapping template that is used to translate REST
                                 elements, such as query parameters, to the request
                                 body format required by the service.
        """
        service_uri = (
            f"arn:aws:apigateway:{self.apig_client.meta.region_name}"
            f":{service_endpoint_prefix}:action/{service_action}"
        )
        try:
            self.apig_client.put_method(
                restApiId=self.api_id,
                resourceId=resource_id,
                httpMethod=rest_method,
                authorizationType="NONE",
            )
            self.apig_client.put_method_response(
                restApiId=self.api_id,
                resourceId=resource_id,
                httpMethod=rest_method,
                statusCode="200",
                responseModels={"application/json": "Empty"},
            )
            logger.info("Created %s method for resource %s.", rest_method, resource_id)
        except ClientError:
            logger.exception(
                "Couldn't create %s method for resource %s.", rest_method, resource_id
            )
            raise

        try:
            self.apig_client.put_integration(
                restApiId=self.api_id,
                resourceId=resource_id,
                httpMethod=rest_method,
                type="AWS",
                integrationHttpMethod=service_method,
                credentials=role_arn,
                requestTemplates={"application/json": json.dumps(mapping_template)},
                uri=service_uri,
                passthroughBehavior="WHEN_NO_TEMPLATES",
            )
            self.apig_client.put_integration_response(
                restApiId=self.api_id,
                resourceId=resource_id,
                httpMethod=rest_method,
                statusCode="200",
                responseTemplates={"application/json": ""},
            )
            logger.info(
                "Created integration for resource %s to service URI %s.",
                resource_id,
                service_uri,
            )
        except ClientError:
            logger.exception(
                "Couldn't create integration for resource %s to service URI %s.",
                resource_id,
                service_uri,
            )
            raise

class ApiGatewayToService:
    """
    Encapsulates Amazon API Gateway functions that are used to create a REST API that
    integrates with another AWS service.
    """

    def __init__(self, apig_client):
        """
        :param apig_client: A Boto3 API Gateway client.
        """
        self.apig_client = apig_client
        self.api_id = None
        self.root_id = None
        self.stage = None


    def add_integration_method(
        self,
        resource_id,
        rest_method,
        service_endpoint_prefix,
        service_action,
        service_method,
        role_arn,
        mapping_template,
    ):
        """
        Adds an integration method to a REST API. An integration method is a REST
        resource, such as '/users', and an HTTP verb, such as GET. The integration
        method is backed by an AWS service, such as Amazon DynamoDB.

        :param resource_id: The ID of the REST resource.
        :param rest_method: The HTTP verb used with the REST resource.
        :param service_endpoint_prefix: The service endpoint that is integrated with
                                        this method, such as 'dynamodb'.
        :param service_action: The action that is called on the service, such as
                               'GetItem'.
        :param service_method: The HTTP method of the service request, such as POST.
        :param role_arn: The Amazon Resource Name (ARN) of a role that grants API
                         Gateway permission to use the specified action with the
                         service.
        :param mapping_template: A mapping template that is used to translate REST
                                 elements, such as query parameters, to the request
                                 body format required by the service.
        """
        service_uri = (
            f"arn:aws:apigateway:{self.apig_client.meta.region_name}"
            f":{service_endpoint_prefix}:action/{service_action}"
        )
        try:
            self.apig_client.put_method(
                restApiId=self.api_id,
                resourceId=resource_id,
                httpMethod=rest_method,
                authorizationType="NONE",
            )
            self.apig_client.put_method_response(
                restApiId=self.api_id,
                resourceId=resource_id,
                httpMethod=rest_method,
                statusCode="200",
                responseModels={"application/json": "Empty"},
            )
            logger.info("Created %s method for resource %s.", rest_method, resource_id)
        except ClientError:
            logger.exception(
                "Couldn't create %s method for resource %s.", rest_method, resource_id
            )
            raise

        try:
            self.apig_client.put_integration(
                restApiId=self.api_id,
                resourceId=resource_id,
                httpMethod=rest_method,
                type="AWS",
                integrationHttpMethod=service_method,
                credentials=role_arn,
                requestTemplates={"application/json": json.dumps(mapping_template)},
                uri=service_uri,
                passthroughBehavior="WHEN_NO_TEMPLATES",
            )
            self.apig_client.put_integration_response(
                restApiId=self.api_id,
                resourceId=resource_id,
                httpMethod=rest_method,
                statusCode="200",
                responseTemplates={"application/json": ""},
            )
            logger.info(
                "Created integration for resource %s to service URI %s.",
                resource_id,
                service_uri,
            )
        except ClientError:
            logger.exception(
                "Couldn't create integration for resource %s to service URI %s.",
                resource_id,
                service_uri,
            )
            raise

class ApiGatewayToService:
    """
    Encapsulates Amazon API Gateway functions that are used to create a REST API that
    integrates with another AWS service.
    """

    def __init__(self, apig_client):
        """
        :param apig_client: A Boto3 API Gateway client.
        """
        self.apig_client = apig_client
        self.api_id = None
        self.root_id = None
        self.stage = None


    def add_integration_method(
        self,
        resource_id,
        rest_method,
        service_endpoint_prefix,
        service_action,
        service_method,
        role_arn,
        mapping_template,
    ):
        """
        Adds an integration method to a REST API. An integration method is a REST
        resource, such as '/users', and an HTTP verb, such as GET. The integration
        method is backed by an AWS service, such as Amazon DynamoDB.

        :param resource_id: The ID of the REST resource.
        :param rest_method: The HTTP verb used with the REST resource.
        :param service_endpoint_prefix: The service endpoint that is integrated with
                                        this method, such as 'dynamodb'.
        :param service_action: The action that is called on the service, such as
                               'GetItem'.
        :param service_method: The HTTP method of the service request, such as POST.
        :param role_arn: The Amazon Resource Name (ARN) of a role that grants API
                         Gateway permission to use the specified action with the
                         service.
        :param mapping_template: A mapping template that is used to translate REST
                                 elements, such as query parameters, to the request
                                 body format required by the service.
        """
        service_uri = (
            f"arn:aws:apigateway:{self.apig_client.meta.region_name}"
            f":{service_endpoint_prefix}:action/{service_action}"
        )
        try:
            self.apig_client.put_method(
                restApiId=self.api_id,
                resourceId=resource_id,
                httpMethod=rest_method,
                authorizationType="NONE",
            )
            self.apig_client.put_method_response(
                restApiId=self.api_id,
                resourceId=resource_id,
                httpMethod=rest_method,
                statusCode="200",
                responseModels={"application/json": "Empty"},
            )
            logger.info("Created %s method for resource %s.", rest_method, resource_id)
        except ClientError:
            logger.exception(
                "Couldn't create %s method for resource %s.", rest_method, resource_id
            )
            raise

        try:
            self.apig_client.put_integration(
                restApiId=self.api_id,
                resourceId=resource_id,
                httpMethod=rest_method,
                type="AWS",
                integrationHttpMethod=service_method,
                credentials=role_arn,
                requestTemplates={"application/json": json.dumps(mapping_template)},
                uri=service_uri,
                passthroughBehavior="WHEN_NO_TEMPLATES",
            )
            self.apig_client.put_integration_response(
                restApiId=self.api_id,
                resourceId=resource_id,
                httpMethod=rest_method,
                statusCode="200",
                responseTemplates={"application/json": ""},
            )
            logger.info(
                "Created integration for resource %s to service URI %s.",
                resource_id,
                service_uri,
            )
        except ClientError:
            logger.exception(
                "Couldn't create integration for resource %s to service URI %s.",
                resource_id,
                service_uri,
            )
            raise

Shows how to use AWS Chalice with the AWS SDK for Python (Boto3) to create a serverless REST API that uses Amazon API Gateway, AWS Lambda, and Amazon DynamoDB. The REST API simulates a system that tracks daily cases of COVID-19 in the United States, using fictional data. Learn how to:

For complete source code and instructions on how to set up and run, see the full example on GitHub.

Shows how to use the AWS SDK for Python (Boto3) with the Amazon Relational Database Service (Amazon RDS) API and AWS Chalice to create a REST API backed by an Amazon Aurora database. The web service is fully serverless and represents a simple lending library where patrons can borrow and return books. Learn how to:

For complete source code and instructions on how to set up and run, see the full example on GitHub.

Shows how to use the AWS SDK for Python (Boto3) with Amazon API Gateway V2 to create a websocket API that integrates with AWS Lambda and Amazon DynamoDB.

For complete source code and instructions on how to set up and run, see the full example on GitHub.

Create a class that wraps API Gateway operations.

import argparse
import json
import logging
from pprint import pprint
import boto3
from botocore.exceptions import ClientError
import requests

logger = logging.getLogger(__name__)


class ApiGatewayToService:
    """
    Encapsulates Amazon API Gateway functions that are used to create a REST API that
    integrates with another AWS service.
    """

    def __init__(self, apig_client):
        """
        :param apig_client: A Boto3 API Gateway client.
        """
        self.apig_client = apig_client
        self.api_id = None
        self.root_id = None
        self.stage = None


    def create_rest_api(self, api_name):
        """
        Creates a REST API on API Gateway. The default API has only a root resource
        and no HTTP methods.

        :param api_name: The name of the API. This descriptive name is not used in
                         the API path.
        :return: The ID of the newly created API.
        """
        try:
            result = self.apig_client.create_rest_api(name=api_name)
            self.api_id = result["id"]
            logger.info("Created REST API %s with ID %s.", api_name, self.api_id)
        except ClientError:
            logger.exception("Couldn't create REST API %s.", api_name)
            raise

        try:
            result = self.apig_client.get_resources(restApiId=self.api_id)
            self.root_id = next(
                item for item in result["items"] if item["path"] == "/"
            )["id"]
        except ClientError:
            logger.exception("Couldn't get resources for API %s.", self.api_id)
            raise
        except StopIteration as err:
            logger.exception("No root resource found in API %s.", self.api_id)
            raise ValueError from err

        return self.api_id


    def add_rest_resource(self, parent_id, resource_path):
        """
        Adds a resource to a REST API.

        :param parent_id: The ID of the parent resource.
        :param resource_path: The path of the new resource, relative to the parent.
        :return: The ID of the new resource.
        """
        try:
            result = self.apig_client.create_resource(
                restApiId=self.api_id, parentId=parent_id, pathPart=resource_path
            )
            resource_id = result["id"]
            logger.info("Created resource %s.", resource_path)
        except ClientError:
            logger.exception("Couldn't create resource %s.", resource_path)
            raise
        else:
            return resource_id


    def add_integration_method(
        self,
        resource_id,
        rest_method,
        service_endpoint_prefix,
        service_action,
        service_method,
        role_arn,
        mapping_template,
    ):
        """
        Adds an integration method to a REST API. An integration method is a REST
        resource, such as '/users', and an HTTP verb, such as GET. The integration
        method is backed by an AWS service, such as Amazon DynamoDB.

        :param resource_id: The ID of the REST resource.
        :param rest_method: The HTTP verb used with the REST resource.
        :param service_endpoint_prefix: The service endpoint that is integrated with
                                        this method, such as 'dynamodb'.
        :param service_action: The action that is called on the service, such as
                               'GetItem'.
        :param service_method: The HTTP method of the service request, such as POST.
        :param role_arn: The Amazon Resource Name (ARN) of a role that grants API
                         Gateway permission to use the specified action with the
                         service.
        :param mapping_template: A mapping template that is used to translate REST
                                 elements, such as query parameters, to the request
                                 body format required by the service.
        """
        service_uri = (
            f"arn:aws:apigateway:{self.apig_client.meta.region_name}"
            f":{service_endpoint_prefix}:action/{service_action}"
        )
        try:
            self.apig_client.put_method(
                restApiId=self.api_id,
                resourceId=resource_id,
                httpMethod=rest_method,
                authorizationType="NONE",
            )
            self.apig_client.put_method_response(
                restApiId=self.api_id,
                resourceId=resource_id,
                httpMethod=rest_method,
                statusCode="200",
                responseModels={"application/json": "Empty"},
            )
            logger.info("Created %s method for resource %s.", rest_method, resource_id)
        except ClientError:
            logger.exception(
                "Couldn't create %s method for resource %s.", rest_method, resource_id
            )
            raise

        try:
            self.apig_client.put_integration(
                restApiId=self.api_id,
                resourceId=resource_id,
                httpMethod=rest_method,
                type="AWS",
                integrationHttpMethod=service_method,
                credentials=role_arn,
                requestTemplates={"application/json": json.dumps(mapping_template)},
                uri=service_uri,
                passthroughBehavior="WHEN_NO_TEMPLATES",
            )
            self.apig_client.put_integration_response(
                restApiId=self.api_id,
                resourceId=resource_id,
                httpMethod=rest_method,
                statusCode="200",
                responseTemplates={"application/json": ""},
            )
            logger.info(
                "Created integration for resource %s to service URI %s.",
                resource_id,
                service_uri,
            )
        except ClientError:
            logger.exception(
                "Couldn't create integration for resource %s to service URI %s.",
                resource_id,
                service_uri,
            )
            raise


    def deploy_api(self, stage_name):
        """
        Deploys a REST API. After a REST API is deployed, it can be called from any
        REST client, such as the Python Requests package or Postman.

        :param stage_name: The stage of the API to deploy, such as 'test'.
        :return: The base URL of the deployed REST API.
        """
        try:
            self.apig_client.create_deployment(
                restApiId=self.api_id, stageName=stage_name
            )
            self.stage = stage_name
            logger.info("Deployed stage %s.", stage_name)
        except ClientError:
            logger.exception("Couldn't deploy stage %s.", stage_name)
            raise
        else:
            return self.api_url()



    def api_url(self, resource=None):
        """
        Builds the REST API URL from its parts.

        :param resource: The resource path to append to the base URL.
        :return: The REST URL to the specified resource.
        """
        url = (
            f"https://{self.api_id}.execute-api.{self.apig_client.meta.region_name}"
            f".amazonaws.com/{self.stage}"
        )
        if resource is not None:
            url = f"{url}/{resource}"
        return url

Deploy a REST API and call it with the Requests package.

def usage_demo(table_name, role_name, rest_api_name):
    """
    Demonstrates how to used API Gateway to create and deploy a REST API, and how
    to use the Requests package to call it.

    :param table_name: The name of the demo DynamoDB table.
    :param role_name: The name of the demo role that grants API Gateway permission to
                      call DynamoDB.
    :param rest_api_name: The name of the demo REST API created by the demo.
    """
    gateway = ApiGatewayToService(boto3.client("apigateway"))
    role = boto3.resource("iam").Role(role_name)

    print("Creating REST API in API Gateway.")
    gateway.create_rest_api(rest_api_name)

    print("Adding resources to the REST API.")
    profiles_id = gateway.add_rest_resource(gateway.root_id, "profiles")
    username_id = gateway.add_rest_resource(profiles_id, "{username}")

    # The DynamoDB service requires that all integration requests use POST.
    print("Adding integration methods to read and write profiles in Amazon DynamoDB.")
    gateway.add_integration_method(
        profiles_id,
        "GET",
        "dynamodb",
        "Scan",
        "POST",
        role.arn,
        {"TableName": table_name},
    )
    gateway.add_integration_method(
        profiles_id,
        "POST",
        "dynamodb",
        "PutItem",
        "POST",
        role.arn,
        {
            "TableName": table_name,
            "Item": {
                "username": {"S": "$input.path('$.username')"},
                "name": {"S": "$input.path('$.name')"},
                "title": {"S": "$input.path('$.title')"},
            },
        },
    )
    gateway.add_integration_method(
        username_id,
        "GET",
        "dynamodb",
        "GetItem",
        "POST",
        role.arn,
        {
            "TableName": table_name,
            "Key": {"username": {"S": "$method.request.path.username"}},
        },
    )

    stage = "test"
    print(f"Deploying the {stage} stage.")
    gateway.deploy_api(stage)

    profiles_url = gateway.api_url("profiles")
    print(
        f"Using the Requests package to post some people to the profiles REST API at "
        f"{profiles_url}."
    )
    requests.post(
        profiles_url,
        json={"username": "will", "name": "William Shakespeare", "title": "playwright"},
    )
    requests.post(
        profiles_url,
        json={
            "username": "ludwig",
            "name": "Ludwig van Beethoven",
            "title": "composer",
        },
    )
    requests.post(
        profiles_url,
        json={"username": "jane", "name": "Jane Austen", "title": "author"},
    )
    print("Getting the list of profiles from the REST API.")
    profiles = requests.get(profiles_url).json()
    pprint(profiles)
    print(f"Getting just the profile for username 'jane' (URL: {profiles_url}/jane).")
    jane = requests.get(f"{profiles_url}/jane").json()
    pprint(jane)

This example shows how to create and use an Amazon API Gateway REST API that targets an AWS Lambda function. The Lambda handler demonstrates how to route based on HTTP methods; how to get data from the query string, header, and body; and how to return a JSON response.

This example is best viewed on GitHub. For complete source code and instructions on how to set up and run, see the full example on GitHub.