feat(cdk): expose authorizer id and authorization type

packages/@aws-cdk-testing/framework-integ/test/aws-apigatewayv2-authorizers/test/http/integ.lambda.ts

@@ -62,4 +62,10 @@ new CfnOutput(stack, 'URL', {
 });
 new CfnOutput(stack, 'URLWithDefaultAuthorizer', {
   value: httpApiWithDefaultAuthorizer.url!,
-});
+});
+new CfnOutput(stack, 'AuthorizerId', {
+  value: authorizer.authorizerId,
+});
+new CfnOutput(stack, 'AuthorizationType', {
+  value: authorizer.authorizationType,
+});

packages/@aws-cdk-testing/framework-integ/test/aws-apigatewayv2-authorizers/test/http/integ.user-pool.ts

@@ -3,7 +3,7 @@ import { HttpApi, HttpMethod, HttpRoute, HttpRouteKey } from 'aws-cdk-lib/aws-ap
 import { HttpLambdaIntegration } from 'aws-cdk-lib/aws-apigatewayv2-integrations';
 import * as cognito from 'aws-cdk-lib/aws-cognito';
 import * as lambda from 'aws-cdk-lib/aws-lambda';
-import { App, Stack } from 'aws-cdk-lib';
+import { App, Stack, CfnOutput } from 'aws-cdk-lib';
 import { HttpUserPoolAuthorizer } from 'aws-cdk-lib/aws-apigatewayv2-authorizers';
 
 /*
@@ -45,4 +45,11 @@ new HttpRoute(stack, 'Route', {
   httpApi: httpApiWithDefaultAuthorizer,
   routeKey: HttpRouteKey.with('/v1/mything/{proxy+}', HttpMethod.ANY),
   integration: new HttpLambdaIntegration('RootIntegration', handler),
-});
+});
+
+new CfnOutput(stack, 'AuthorizerId', {
+  value: authorizer.authorizerId,
+});
+new CfnOutput(stack, 'AuthorizationType', {
+  value: authorizer.authorizationType,
+});

packages/aws-cdk-lib/aws-apigatewayv2-authorizers/README.md

@@ -306,3 +306,47 @@ import software.amazon.awscdk.aws_apigatewayv2_authorizers.*;
 // If you want to import a specific construct
 import software.amazon.awscdk.aws_apigatewayv2_authorizers.WebSocketIamAuthorizer;
 ```
+
+## Import an existing HTTP Authorizer
+If you want to import av existing HTTP Authorizer you can retrieve the authorizer id once it has been bound to a route, store it where you prefer, and then pass the values to
+
+`HttpAuthorizer.fromHttpAuthorizerAttributes`
+
+```ts
+import { HttpLambdaAuthorizer, HttpLambdaResponseType } from 'aws-cdk-lib/aws-apigatewayv2-authorizers';
+import { HttpUrlIntegration } from 'aws-cdk-lib/aws-apigatewayv2-integrations';
+import { CfnOutput } from 'aws-cdk-lib';
+
+// This function handles your auth logic
+declare const authHandler: lambda.Function;
+
+const authorizer = new HttpLambdaAuthorizer('BooksAuthorizer', authHandler, {
+  responseTypes: [HttpLambdaResponseType.SIMPLE], // Define if returns simple and/or iam response
+});
+
+const api = new apigwv2.HttpApi(this, 'HttpApi');
+
+api.addRoutes({
+  integration: new HttpUrlIntegration('BooksIntegration', 'https://get-books-proxy.example.com'),
+  path: '/books',
+  authorizer,
+});
+
+// You can only access authorizerId after it's been bound to a route
+// In this example we expect use CfnOutput
+new CfnOutput(this, 'authorizerId', authorizer.authorizerId);
+new CfnOutput(this, 'authorizerType', authorizer.authorizerType);
+```
+
+```ts
+import { HttpAuthorizer } from 'aws-cdk-lib/aws-apigatewayv2';
+import { Fn } from 'aws-cdk-lib'
+
+const authorizerId = Fn.importValue('authorizerId');
+const authorizerType = Fn.importValue('authorizerType');
+
+const authorizer = HttpAuthorizer.fromHttpAuthorizerAttributes(stack, '', {
+    authorizerId,
+    authorizerType
+});
+```

packages/aws-cdk-lib/aws-apigatewayv2-authorizers/lib/http/iam.ts

@@ -9,9 +9,13 @@ import {
  * Authorize HTTP API Routes with IAM
  */
 export class HttpIamAuthorizer implements IHttpRouteAuthorizer {
+  /**
+   * The authorizationType used for IAM Authorizer
+   */
+  public readonly authorizationType = HttpAuthorizerType.IAM;
   public bind(_options: HttpRouteAuthorizerBindOptions): HttpRouteAuthorizerConfig {
     return {
-      authorizationType: HttpAuthorizerType.IAM,
+      authorizationType: this.authorizationType,
     };
   }
 }

packages/aws-cdk-lib/aws-apigatewayv2-authorizers/lib/http/jwt.ts

@@ -37,6 +37,10 @@ export interface HttpJwtAuthorizerProps {
  */
 export class HttpJwtAuthorizer implements IHttpRouteAuthorizer {
   private authorizer?: HttpAuthorizer;
+  /**
+   * The authorizationType used for JWT Authorizer
+   */
+  public readonly authorizationType = 'JWT';
 
   /**
    * Initialize a JWT authorizer to be bound with HTTP route.
@@ -50,6 +54,18 @@ export class HttpJwtAuthorizer implements IHttpRouteAuthorizer {
     private readonly props: HttpJwtAuthorizerProps) {
   }
 
+  /**
+   * Return the id of the authorizer if it's been constructed
+   */
+  public get authorizerId(): string {
+    if (!this.authorizer) {
+      throw new Error(
+        'Cannot access authorizerId until authorizer is attached to a HttpRoute',
+      );
+    }
+    return this.authorizer.authorizerId;
+  }
+
   public bind(options: HttpRouteAuthorizerBindOptions): HttpRouteAuthorizerConfig {
     if (!this.authorizer) {
       this.authorizer = new HttpAuthorizer(options.scope, this.id, {
@@ -64,7 +80,7 @@ export class HttpJwtAuthorizer implements IHttpRouteAuthorizer {
 
     return {
       authorizerId: this.authorizer.authorizerId,
-      authorizationType: 'JWT',
+      authorizationType: this.authorizationType,
     };
   }
 }

packages/aws-cdk-lib/aws-apigatewayv2-authorizers/lib/http/lambda.ts

@@ -68,6 +68,11 @@ export class HttpLambdaAuthorizer implements IHttpRouteAuthorizer {
   private authorizer?: HttpAuthorizer;
   private httpApi?: IHttpApi;
 
+  /**
+   * The authorizationType used for Lambda Authorizer
+   */
+  public readonly authorizationType = 'CUSTOM';
+
   /**
    * Initialize a lambda authorizer to be bound with HTTP route.
    * @param id The id of the underlying construct
@@ -80,6 +85,18 @@ export class HttpLambdaAuthorizer implements IHttpRouteAuthorizer {
     private readonly props: HttpLambdaAuthorizerProps = {}) {
   }
 
+  /**
+   * Return the id of the authorizer if it's been constructed
+   */
+  public get authorizerId(): string {
+    if (!this.authorizer) {
+      throw new Error(
+        'Cannot access authorizerId until authorizer is attached to a HttpRoute',
+      );
+    }
+    return this.authorizer.authorizerId;
+  }
+
   public bind(options: HttpRouteAuthorizerBindOptions): HttpRouteAuthorizerConfig {
     if (this.httpApi && (this.httpApi.apiId !== options.route.httpApi.apiId)) {
       throw new Error('Cannot attach the same authorizer to multiple Apis');
@@ -116,7 +133,7 @@ export class HttpLambdaAuthorizer implements IHttpRouteAuthorizer {
 
     return {
       authorizerId: this.authorizer.authorizerId,
-      authorizationType: 'CUSTOM',
+      authorizationType: this.authorizationType,
     };
   }
 }

packages/aws-cdk-lib/aws-apigatewayv2-authorizers/lib/http/user-pool.ts

@@ -38,7 +38,10 @@ export interface HttpUserPoolAuthorizerProps {
  */
 export class HttpUserPoolAuthorizer implements IHttpRouteAuthorizer {
   private authorizer?: HttpAuthorizer;
-
+  /**
+   * The authorizationType used for UserPool Authorizer
+   */
+  public readonly authorizationType = 'JWT';
   /**
    * Initialize a Cognito user pool authorizer to be bound with HTTP route.
    * @param id The id of the underlying construct
@@ -51,6 +54,18 @@ export class HttpUserPoolAuthorizer implements IHttpRouteAuthorizer {
     private readonly props: HttpUserPoolAuthorizerProps = {}) {
   }
 
+  /**
+   * Return the id of the authorizer if it's been constructed
+   */
+  public get authorizerId(): string {
+    if (!this.authorizer) {
+      throw new Error(
+        'Cannot access authorizerId until authorizer is attached to a HttpRoute',
+      );
+    }
+    return this.authorizer.authorizerId;
+  }
+
   public bind(options: HttpRouteAuthorizerBindOptions): HttpRouteAuthorizerConfig {
     if (!this.authorizer) {
       const region = this.props.userPoolRegion ?? Stack.of(options.scope).region;
@@ -68,7 +83,7 @@ export class HttpUserPoolAuthorizer implements IHttpRouteAuthorizer {
 
     return {
       authorizerId: this.authorizer.authorizerId,
-      authorizationType: 'JWT',
+      authorizationType: this.authorizationType,
     };
   }
 }

packages/aws-cdk-lib/aws-apigatewayv2-authorizers/test/http/jwt.test.ts

@@ -57,4 +57,37 @@ describe('HttpJwtAuthorizer', () => {
     // THEN
     Template.fromStack(stack).resourceCountIs('AWS::ApiGatewayV2::Authorizer', 1);
   });
+
+  test('should expose authorizer id after authorizer has been bound to route', () => {
+    // GIVEN
+    const stack = new Stack();
+    const api = new HttpApi(stack, 'HttpApi');
+    const authorizer = new HttpJwtAuthorizer('BooksAuthorizer', 'https://test.us.auth0.com', {
+      jwtAudience: ['3131231'],
+    });
+
+    // WHEN
+    api.addRoutes({
+      integration: new DummyRouteIntegration(),
+      path: '/books',
+      authorizer,
+    });
+
+    // THEN
+    expect(authorizer.authorizerId).toBeDefined();
+  });
+
+  test('should throw error when acessing authorizer before it been bound to route', () => {
+    // GIVEN
+    const stack = new Stack();
+    const t = () => {
+      const authorizer = new HttpJwtAuthorizer('BooksAuthorizer', 'https://test.us.auth0.com', {
+        jwtAudience: ['3131231'],
+      });
+      const authorizerId = authorizer.authorizerId;
+    };
+
+    // THEN
+    expect(t).toThrow(Error);
+  });
 });

packages/aws-cdk-lib/aws-apigatewayv2-authorizers/test/http/lambda.test.ts

@@ -158,4 +158,47 @@ describe('HttpLambdaAuthorizer', () => {
       AuthorizerResultTtlInSeconds: 600,
     });
   });
+
+  test('should expose authorizer id after authorizer has been bound to route', () => {
+    // GIVEN
+    const stack = new Stack();
+    const api = new HttpApi(stack, 'HttpApi');
+
+    const handler = new Function(stack, 'auth-function', {
+      runtime: lambda.Runtime.NODEJS_LATEST,
+      code: Code.fromInline('exports.handler = () => {return true}'),
+      handler: 'index.handler',
+    });
+
+    const authorizer = new HttpLambdaAuthorizer('BooksAuthorizer', handler);
+
+    // WHEN
+    api.addRoutes({
+      integration: new DummyRouteIntegration(),
+      path: '/books',
+      authorizer,
+    });
+
+    // THEN
+    expect(authorizer.authorizerId).toBeDefined();
+  });
+
+  test('should throw error when acessing authorizer before it been bound to route', () => {
+    // GIVEN
+    const stack = new Stack();
+
+    const handler = new Function(stack, 'auth-function', {
+      runtime: lambda.Runtime.NODEJS_LATEST,
+      code: Code.fromInline('exports.handler = () => {return true}'),
+      handler: 'index.handler',
+    });
+
+    const t = () => {
+      const authorizer = new HttpLambdaAuthorizer('BooksAuthorizer', handler);
+      const authorizerId = authorizer.authorizerId;
+    };
+
+    // THEN
+    expect(t).toThrow(Error);
+  });
 });

packages/aws-cdk-lib/aws-apigatewayv2-authorizers/test/http/user-pool.test.ts

@@ -103,4 +103,44 @@ describe('HttpUserPoolAuthorizer', () => {
       },
     });
   });
+
+  test('should expose authorizer id after authorizer has been bound to route', () => {
+    // GIVEN
+    const stack = new Stack();
+    const api = new HttpApi(stack, 'HttpApi');
+    const userPool = new UserPool(stack, 'UserPool');
+    const userPoolClient1 = userPool.addClient('UserPoolClient1');
+    const userPoolClient2 = userPool.addClient('UserPoolClient2');
+    const authorizer = new HttpUserPoolAuthorizer('BooksAuthorizer', userPool, {
+      userPoolClients: [userPoolClient1, userPoolClient2],
+    });
+
+    // WHEN
+    api.addRoutes({
+      integration: new DummyRouteIntegration(),
+      path: '/books',
+      authorizer,
+    });
+
+    // THEN
+    expect(authorizer.authorizerId).toBeDefined();
+  });
+
+  test('should throw error when acessing authorizer before it been bound to route', () => {
+    // GIVEN
+    const stack = new Stack();
+    const userPool = new UserPool(stack, 'UserPool');
+    const userPoolClient1 = userPool.addClient('UserPoolClient1');
+    const userPoolClient2 = userPool.addClient('UserPoolClient2');
+
+    const t = () => {
+      const authorizer = new HttpUserPoolAuthorizer('BooksAuthorizer', userPool, {
+        userPoolClients: [userPoolClient1, userPoolClient2],
+      });
+      const authorizerId = authorizer.authorizerId;
+    };
+
+    // THEN
+    expect(t).toThrow(Error);
+  });
 });

packages/aws-cdk-lib/aws-apigatewayv2/lib/http/authorizer.ts

@@ -257,9 +257,14 @@ function undefinedIfNoKeys<A extends { [key: string]: unknown }>(obj: A): A | un
  * Explicitly configure no authorizers on specific HTTP API routes.
  */
 export class HttpNoneAuthorizer implements IHttpRouteAuthorizer {
+  /**
+   * The authorizationType used for IAM Authorizer
+   */
+  public readonly authorizationType = 'NONE';
   public bind(_options: HttpRouteAuthorizerBindOptions): HttpRouteAuthorizerConfig {
     return {
-      authorizationType: 'NONE',
+      authorizationType: this.authorizationType,
     };
   }
 }
+