next.js netlify aws lambda higher order function composition handler middleware

create-post.ts

export const handler: Handler = compose(
  httpRespond(),
  httpMethod('POST'),
)(async ({ body }: APIGatewayEvent) => ({
  post: await createPost(JSON.parse(body))
}))

/*

Recently wrote some Next.js/Netlify functions to run in AWS Lambdas.

Noticed a lot of code duplication in the handler functions
for basic things like

- Enforce specific HTTP method
- Convert response data to JSON

Refactored common logic into higher-order functions, which
act as handler middleware. Yay function composition!

Full source here:

https://github.com/cloworm/guess-that-gif/blob/master/src/lambda/lib/http.ts

*/