Handly

A wrapper for serverless handlers to prevent silly mistakes, based on middy

How to use it ?

Simply wrap your serverless handler like this :

import handly from 'handly'

const handler = async (event, context, callback) => {
  return {
    statusCode: 200,
    body: {
      message: {
        hello: 'world',
      },
    },
  };
};

export default handly(handler)

How does it work ?

Handly wraps useful middy middlewares as well as other middlewares made by me.

httpEventNormalizer

Adds queryStringParameters and pathParameters keys even though there are null to allow code such as to never throw :

event.pathParameters.userId

httpHeaderNormalizer

Normalize http headers, for example Content-type becomes Content-Type

jsonBodyParser

When Content-Type is set to application/json, this middleware parses the body automatically so that event.body becomes an object

jsonBodyParser

When Content-Type is set to application/json, this middleware parses the body automatically so that event.body becomes an object

urlEncodeBodyParser

Same as jsonBodyParser for application/x-www-form-urlencoded

failsafe

This one is not a middy middleware but a wrapper which will return a 500 http response when an uncaught exception is thrown. The default behavior is to return a 200 response…

normalizedResponse

Not official middy middleware. It automatically calls JSON.stringify on every response body. This is something mandatory with aws.

Author

Hello, I am Julien vallini, an indie-maker. Follow me on twitter if you like my work.