@aws-solutions-constructs/aws-apigateway-iot

aws-apigateway-iot module

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All classes are under active development and subject to non-backward compatible changes or removal in any future version. These are not subject to the Semantic Versioning model. This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.

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Reference Documentation:	https://docs.aws.amazon.com/solutions/latest/constructs/

Language	Package
Python	aws_solutions_constructs.aws_apigateway_iot
Typescript	@aws-solutions-constructs/aws-apigateway-iot
Java	software.amazon.awsconstructs.services.apigatewayiot

Overview

This AWS Solutions Construct implements an Amazon API Gateway REST API connected to AWS IoT pattern.

This construct creates a scalable HTTPS proxy between API Gateway and AWS IoT. This comes in handy when wanting to allow legacy devices that do not support the MQTT or MQTT/Websocket protocol to interact with the AWS IoT platform.

This implementation enables write-only messages to be published on given MQTT topics, and also supports shadow updates of HTTPS devices to allowed things in the device registry. It does not involve Lambda functions for proxying messages, and instead relies on direct API Gateway to AWS IoT integration which supports both JSON messages as well as binary messages.

Here is a minimal deployable pattern definition, note that the ATS endpoint for IoT must be used to avoid SSL certificate issues:

Typescript

import { Construct } from 'constructs';
import { Stack, StackProps } from 'aws-cdk-lib';
import { ApiGatewayToIot } from '@aws-solutions-constructs/aws-apigateway-iot';

new ApiGatewayToIot(this, 'ApiGatewayToIotPattern', {
    iotEndpoint: 'a1234567890123-ats'
});

Python

from aws_solutions_constructs.aws_apigateway_iot import ApiGatewayToIot
from aws_cdk import Stack
from constructs import Construct

ApiGatewayToIot(self, 'ApiGatewayToIotPattern',
    iot_endpoint='a1234567890123-ats'
)

Java

import software.constructs.Construct;

import software.amazon.awscdk.Stack;
import software.amazon.awscdk.StackProps;
import software.amazon.awsconstructs.services.apigatewayiot.*;

new ApiGatewayToIot(this, "ApiGatewayToIotPattern", new ApiGatewayToIotProps.Builder()
        .iotEndpoint("a1234567890123-ats")
        .build());

Pattern Construct Props

Name	Type	Description
iotEndpoint	string	The AWS IoT endpoint subdomain to integrate the API Gateway with (e.g a1234567890123-ats). Note that this must point to the ATS endpoint to avoid SSL certificate trust issues. The endpoint can be retrieved by running aws iot describe-endpoint --endpoint-type iot:Data-ATS.
apiGatewayCreateApiKey?	boolean	If set to true, an API Key is created and associated to a UsagePlan. User should specify x-api-key header while accessing RestApi. Default value set to false
apiGatewayExecutionRole?	iam.Role	IAM Role used by the API Gateway to access AWS IoT. If not specified, a default role is created with wildcard ('*') access to all topics and things.
apiGatewayProps?	api.restApiProps	Optional user-provided props to override the default props for the API Gateway.
logGroupProps?	logs.LogGroupProps	User provided props to override the default props for for the CloudWatchLogs LogGroup.

Pattern Properties

Name	Type	Description
apiGateway	api.RestApi	Returns an instance of the API Gateway REST API created by the pattern.
apiGatewayRole	iam.Role	Returns an instance of the iam.Role created by the construct for API Gateway.
apiGatewayCloudWatchRole?	iam.Role	Returns an instance of the iam.Role created by the construct for API Gateway for CloudWatch access.
apiGatewayLogGroup	logs.LogGroup	Returns an instance of the LogGroup created by the construct for API Gateway access logging to CloudWatch.

Default settings

Out of the box implementation of the Construct without any override will set the following defaults:

Amazon API Gateway

• Deploy an edge-optimized API Endpoint
• Creates API Resources with POST Method to publish messages to IoT Topics
• Creates API Resources with POST Method to publish messages to ThingShadow & NamedShadows
• Enable CloudWatch logging for API Gateway
• Configure IAM role for API Gateway with access to all topics and things
• Set the default authorizationType for all API methods to IAM
• Enable X-Ray Tracing
• Creates a UsagePlan and associates to prod stage

Below is a description of the different resources and methods exposed by the API Gateway after deploying the Construct. See the Examples section for more information on how to easily test these endpoints using curl.

Method	Resource	Query parameter(s)	Return code(s)	Description
POST	/message/<topics>	qos	200/403/500	By calling this endpoint, you need to pass the topics on which you would like to publish (e.g /message/device/foo).
POST	/shadow/<thingName>	None	200/403/500	This route allows to update the shadow document of a thing, given its thingName using Unnamed (classic) shadow type. The body shall comply with the standard shadow stucture comprising a state node and associated desired and reported nodes. See the Updating device shadows section for an example.
POST	/shadow/<thingName>/<shadowName>	None	200/403/500	This route allows to update the named shadow document of a thing, given its thingName and the shadowName using the Named shadow type. The body shall comply with the standard shadow stucture comprising a state node and associated desired and reported nodes. See the Updating named shadows section for an example.

Architecture

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