ok, with the prompt: generate a RESTful API using AWS API Gateway that supports CORS requests without generating the OPTIONS response in a lambda function

I got the following response:

To generate a RESTful API using AWS API Gateway that supports CORS requests without generating the OPTIONS response in a Lambda function, we can configure the API Gateway to handle CORS directly. This involves setting up the necessary resources and methods in API Gateway, and enabling CORS on the methods. Here's a Pulumi program to accomplish this:

typescript
import * as pulumi from "@pulumi/pulumi";
import * as aws from "@pulumi/aws";

// Create an API Gateway REST API
const api = new aws.apigateway.RestApi("myApi", {
    description: "My REST API",
});

// Create a resource (e.g., /myresource)
const resource = new aws.apigateway.Resource("myResource", {
    parentId: api.rootResourceId,
    pathPart: "myresource",
    restApi: api.id,
});

// Create a GET method for the resource
const getMethod = new aws.apigateway.Method("getMethod", {
    restApi: api.id,
    resourceId: resource.id,
    httpMethod: "GET",
    authorization: "NONE",
});

// Create a mock integration for the GET method
const getIntegration = new aws.apigateway.Integration("getIntegration", {
    restApi: api.id,
    resourceId: resource.id,
    httpMethod: getMethod.httpMethod,
    type: "MOCK",
    requestTemplates: {
        "application/json": `{
            "statusCode": 200
        }`,
    },
    integrationResponses: [{
        statusCode: "200",
        responseTemplates: {
            "application/json": `{
                "message": "Hello, world!"
            }`,
        },
    }],
});

// Create a method response for the GET method
const getMethodResponse = new aws.apigateway.MethodResponse("getMethodResponse", {
    restApi: api.id,
    resourceId: resource.id,
    httpMethod: getMethod.httpMethod,
    statusCode: "200",
    responseModels: {
        "application/json": "Empty",
    },
});

// Enable CORS for the GET method
const corsMethodResponse = new aws.apigateway.MethodResponse("corsMethodResponse", {
    restApi: api.id,
    resourceId: resource.id,
    httpMethod: getMethod.httpMethod,
    statusCode: "200",
    responseParameters: {
        "method.response.header.Access-Control-Allow-Origin": true,
        "method.response.header.Access-Control-Allow-Headers": true,
        "method.response.header.Access-Control-Allow-Methods": true,
    },
});

const corsIntegrationResponse = new aws.apigateway.IntegrationResponse("corsIntegrationResponse", {
    restApi: api.id,
    resourceId: resource.id,
    httpMethod: getMethod.httpMethod,
    statusCode: "200",
    responseParameters: {
        "method.response.header.Access-Control-Allow-Origin": "'*'",
        "method.response.header.Access-Control-Allow-Headers": "'Content-Type,X-Amz-Date,Authorization,X-Api-Key,X-Amz-Security-Token'",
        "method.response.header.Access-Control-Allow-Methods": "'GET,OPTIONS'",
    },
});

// Deploy the API
const deployment = new aws.apigateway.Deployment("deployment", {
    restApi: api.id,
    stageName: "prod",
}, { dependsOn: [getIntegration, corsIntegrationResponse] });

// Export the URL of the API
export const url = pulumi.interpolate`${deployment.invokeUrl}`;

This program sets up an API Gateway with a single resource and method, and configures CORS headers directly on the method responses. The

OPTIONS

method is not handled by a Lambda function but is instead managed by API Gateway's built-in capabilities.

but in the call:

// Create a mock integration for the GET method
const getIntegration = new aws.apigateway.Integration("getIntegration", {
    restApi: api.id,
    resourceId: resource.id,
    httpMethod: getMethod.httpMethod,
    type: "MOCK",
    requestTemplates: {
        "application/json": `{
            "statusCode": 200
        }`,
    },
    integrationResponses: [{
        statusCode: "200",
        responseTemplates: {
            "application/json": `{
                "message": "Hello, world!"
            }`,
        },
    }],
});

integrationResponses

is not a valid property of the

IntegrationArgs

object.

VSCode highlights the problem since it's typescript, but it still takes time to check the package definitions.