docs: fix lambda-function-url example's HttpApi CORS

Author: brettstack

examples/lambda-function-url/packages/cdk/lib/constructs/ExpressApi.ts

@@ -164,36 +164,18 @@ export default class ExpressApi extends Construct {
  })
  }
 
- const api = new HttpApi(this, 'HttpApi', {
- apiName: `Todo-${getEnvironmentName(this.node)}`,
- // corsPreflight: {
- // allowHeaders: [
- // // Must explicitly specify Authorization, othwerise maxAge isn't respected and preflight
- // // will be sent on all requests https://twitter.com/annevk/status/1422959365846351875
- // // Unfortunately, there appears to be a bug in API Gateway where it doesn't return the
- // // correct preflight response headers when 'authorization' is defined.
- // 'authorization',
- // // '*',
- // ],
- // allowMethods: [CorsHttpMethod.ANY],
- // allowOrigins: Cors.ALL_ORIGINS,
- // maxAge: Duration.hours(24), // Firefox caps at 24 hours; Chromium caps at 2 hours
- // },
- defaultDomainMapping: domainResource
- ? {
- domainName: domainResource,
- }
- : undefined,
- })
+ const api = new HttpApi(this, 'HttpApi')
  api.addRoutes({
  path: '/{proxy+}',
  integration,
  authorizer,
- // Must exclude OPTIONS so that CORS Preflight requests don't get sent through to Lambda,
- // and instead are fulfilled by API Gateway
- // methods: [HttpMethod.HEAD, HttpMethod.GET, HttpMethod.POST, HttpMethod.PATCH, HttpMethod.PUT, HttpMethod.DELETE],
  methods: [HttpMethod.ANY],
  })
+ api.addRoutes({
+ path: '/{proxy+}',
+ integration,
+ methods: [HttpMethod.OPTIONS],
+ })
 
  // this.enableApiAccessLogs({ api })