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Package software.amazon.awscdk.services.elasticloadbalancingv2.actions

Actions for AWS Elastic Load Balancing V2

See: Description

Package software.amazon.awscdk.services.elasticloadbalancingv2.actions Description

Actions for AWS Elastic Load Balancing V2

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cdk-constructs: Stable


This package contains integration actions for ELBv2. See the README of the @aws-cdk/aws-elasticloadbalancingv2 library.

Cognito

ELB allows for requests to be authenticated against a Cognito user pool using the AuthenticateCognitoAction. For details on the setup's requirements, read Prepare to use Amazon Cognito. Here's an example:

 import software.amazon.awscdk.services.cognito.*;
 import software.amazon.awscdk.services.ec2.*;
 import software.amazon.awscdk.services.elasticloadbalancingv2.*;
 import software.amazon.awscdk.core.App;
 import software.amazon.awscdk.core.CfnOutput;
 import software.amazon.awscdk.core.Stack;
 import software.constructs.Construct;
 import software.amazon.awscdk.services.elasticloadbalancingv2.actions.*;
 
 CognitoStack extends Stack {CognitoStack(ApplicationLoadBalancer lb = ApplicationLoadBalancer.Builder.create(this, "LB")
         .vpc(vpc)
         .internetFacing(true)
         .build();
 
 UserPool userPool = new UserPool(this, "UserPool");
 UserPoolClient userPoolClient = UserPoolClient.Builder.create(this, "Client")
         .userPool(userPool)
 
         // Required minimal configuration for use with an ELB
         .generateSecret(true)
         .authFlows(AuthFlow.builder()
                 .userPassword(true)
                 .build())
         .oAuth(OAuthSettings.builder()
                 .flows(OAuthFlows.builder()
                         .authorizationCodeGrant(true)
                         .build())
                 .scopes(List.of(OAuthScope.EMAIL))
                 .callbackUrls(List.of(String.format("https://%s/oauth2/idpresponse", lb.getLoadBalancerDnsName())))
                 .build())
         .build();
 CfnUserPoolClient cfnClient = (CfnUserPoolClient)userPoolClient.getNode().getDefaultChild();
 cfnClient.addPropertyOverride("RefreshTokenValidity", 1);
 cfnClient.addPropertyOverride("SupportedIdentityProviders", List.of("COGNITO"));
 
 UserPoolDomain userPoolDomain = UserPoolDomain.Builder.create(this, "Domain")
         .userPool(userPool)
         .cognitoDomain(CognitoDomainOptions.builder()
                 .domainPrefix("test-cdk-prefix")
                 .build())
         .build();
 
 lb.addListener("Listener", BaseApplicationListenerProps.builder()
         .port(443)
         .certificates(List.of(certificate))
         .defaultAction(AuthenticateCognitoAction.Builder.create()
                 .userPool(userPool)
                 .userPoolClient(userPoolClient)
                 .userPoolDomain(userPoolDomain)
                 .next(ListenerAction.fixedResponse(200, FixedResponseOptions.builder()
                         .contentType("text/plain")
                         .messageBody("Authenticated")
                         .build()))
                 .build())
         .build());
 
 CfnOutput.Builder.create(this, "DNS")
         .value(lb.getLoadBalancerDnsName())
         .build();
 
 App app = new App();
 new CognitoStack(app, "integ-cognito");
 app.synth();
 

NOTE: this example seems incomplete, I was not able to get the redirect back to the Load Balancer after authentication working. Would love some pointers on what a full working setup actually looks like!

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