@aws-cdk/aws-apigatewayv2-integrations-alpha
v2.114.1-alpha.0
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This module is deprecated. All constructs are now available under aws-cdk-lib/aws-apigatewayv2-integrations
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AWS APIGatewayv2 Integrations
This API may emit warnings. Backward compatibility is not guaranteed.
All constructs moved to aws-cdk-lib/aws-apigatewayv2-integrations.
Table of Contents
HTTP APIs
Integrations connect a route to backend resources. HTTP APIs support Lambda proxy, AWS service, and HTTP proxy integrations. HTTP proxy integrations are also known as private integrations.
Lambda
Lambda integrations enable integrating an HTTP API route with a Lambda function. When a client invokes the route, the API Gateway service forwards the request to the Lambda function and returns the function's response to the client.
The API Gateway service will invoke the Lambda function with an event payload of a specific format. The service expects the function to respond in a specific format. The details on this format are available at Working with AWS Lambda proxy integrations.
The following code configures a route GET /books
with a Lambda proxy integration.
import { HttpLambdaIntegration } from '@aws-cdk/aws-apigatewayv2-integrations-alpha';
declare const booksDefaultFn: lambda.Function;
const booksIntegration = new HttpLambdaIntegration('BooksIntegration', booksDefaultFn);
const httpApi = new apigwv2.HttpApi(this, 'HttpApi');
httpApi.addRoutes({
path: '/books',
methods: [ apigwv2.HttpMethod.GET ],
integration: booksIntegration,
});
HTTP Proxy
HTTP Proxy integrations enables connecting an HTTP API route to a publicly routable HTTP endpoint. When a client invokes the route, the API Gateway service forwards the entire request and response between the API Gateway endpoint and the integrating HTTP endpoint. More information can be found at Working with HTTP proxy integrations.
The following code configures a route GET /books
with an HTTP proxy integration to an HTTP endpoint
get-books-proxy.example.com
.
import { HttpUrlIntegration } from '@aws-cdk/aws-apigatewayv2-integrations-alpha';
const booksIntegration = new HttpUrlIntegration('BooksIntegration', 'https://get-books-proxy.example.com');
const httpApi = new apigwv2.HttpApi(this, 'HttpApi');
httpApi.addRoutes({
path: '/books',
methods: [ apigwv2.HttpMethod.GET ],
integration: booksIntegration,
});
Private Integration
Private integrations enable integrating an HTTP API route with private resources in a VPC, such as Application Load Balancers or Amazon ECS container-based applications. Using private integrations, resources in a VPC can be exposed for access by clients outside of the VPC.
The following integrations are supported for private resources in a VPC.
Application Load Balancer
The following code is a basic application load balancer private integration of HTTP API:
import { HttpAlbIntegration } from '@aws-cdk/aws-apigatewayv2-integrations-alpha';
const vpc = new ec2.Vpc(this, 'VPC');
const lb = new elbv2.ApplicationLoadBalancer(this, 'lb', { vpc });
const listener = lb.addListener('listener', { port: 80 });
listener.addTargets('target', {
port: 80,
});
const httpEndpoint = new apigwv2.HttpApi(this, 'HttpProxyPrivateApi', {
defaultIntegration: new HttpAlbIntegration('DefaultIntegration', listener),
});
When an imported load balancer is used, the vpc
option must be specified for HttpAlbIntegration
.
Network Load Balancer
The following code is a basic network load balancer private integration of HTTP API:
import { HttpNlbIntegration } from '@aws-cdk/aws-apigatewayv2-integrations-alpha';
const vpc = new ec2.Vpc(this, 'VPC');
const lb = new elbv2.NetworkLoadBalancer(this, 'lb', { vpc });
const listener = lb.addListener('listener', { port: 80 });
listener.addTargets('target', {
port: 80,
});
const httpEndpoint = new apigwv2.HttpApi(this, 'HttpProxyPrivateApi', {
defaultIntegration: new HttpNlbIntegration('DefaultIntegration', listener),
});
When an imported load balancer is used, the vpc
option must be specified for HttpNlbIntegration
.
Cloud Map Service Discovery
The following code is a basic discovery service private integration of HTTP API:
import * as servicediscovery from 'aws-cdk-lib/aws-servicediscovery';
import { HttpServiceDiscoveryIntegration } from '@aws-cdk/aws-apigatewayv2-integrations-alpha';
const vpc = new ec2.Vpc(this, 'VPC');
const vpcLink = new apigwv2.VpcLink(this, 'VpcLink', { vpc });
const namespace = new servicediscovery.PrivateDnsNamespace(this, 'Namespace', {
name: 'boobar.com',
vpc,
});
const service = namespace.createService('Service');
const httpEndpoint = new apigwv2.HttpApi(this, 'HttpProxyPrivateApi', {
defaultIntegration: new HttpServiceDiscoveryIntegration('DefaultIntegration', service, {
vpcLink,
}),
});
Request Parameters
Request parameter mapping allows API requests from clients to be modified before they reach backend integrations. Parameter mapping can be used to specify modifications to request parameters. See Transforming API requests and responses.
The following example creates a new header - header2
- as a copy of header1
and removes header1
.
import { HttpAlbIntegration } from '@aws-cdk/aws-apigatewayv2-integrations-alpha';
declare const lb: elbv2.ApplicationLoadBalancer;
const listener = lb.addListener('listener', { port: 80 });
listener.addTargets('target', {
port: 80,
});
const httpEndpoint = new apigwv2.HttpApi(this, 'HttpProxyPrivateApi', {
defaultIntegration: new HttpAlbIntegration('DefaultIntegration', listener, {
parameterMapping: new apigwv2.ParameterMapping()
.appendHeader('header2', apigwv2.MappingValue.requestHeader('header1'))
.removeHeader('header1'),
}),
});
To add mapping keys and values not yet supported by the CDK, use the custom()
method:
import { HttpAlbIntegration } from '@aws-cdk/aws-apigatewayv2-integrations-alpha';
declare const lb: elbv2.ApplicationLoadBalancer;
const listener = lb.addListener('listener', { port: 80 });
listener.addTargets('target', {
port: 80,
});
const httpEndpoint = new apigwv2.HttpApi(this, 'HttpProxyPrivateApi', {
defaultIntegration: new HttpAlbIntegration('DefaultIntegration', listener, {
parameterMapping: new apigwv2.ParameterMapping().custom('myKey', 'myValue'),
}),
});
WebSocket APIs
WebSocket integrations connect a route to backend resources. The following integrations are supported in the CDK.
Lambda WebSocket Integration
Lambda integrations enable integrating a WebSocket API route with a Lambda function. When a client connects/disconnects or sends a message specific to a route, the API Gateway service forwards the request to the Lambda function
The API Gateway service will invoke the Lambda function with an event payload of a specific format.
The following code configures a sendMessage
route with a Lambda integration
import { WebSocketLambdaIntegration } from '@aws-cdk/aws-apigatewayv2-integrations-alpha';
const webSocketApi = new apigwv2.WebSocketApi(this, 'mywsapi');
new apigwv2.WebSocketStage(this, 'mystage', {
webSocketApi,
stageName: 'dev',
autoDeploy: true,
});
declare const messageHandler: lambda.Function;
webSocketApi.addRoute('sendMessage', {
integration: new WebSocketLambdaIntegration('SendMessageIntegration', messageHandler),
});