serverless-helpers

Serverless Request/Response Handlers

Usage

Request, Response, and LambdaResponseFormatter

Require

const Request = require('@itcutives/serverless-helpers/src/request');
const Response = require('@itcutives/serverless-helpers/src/response');
const LambdaResponseFormatter = require('@itcutives/serverless-helpers/src/lambdaResponseFormatter');

Usage

module.exports.handler = async () => {
  const request = REQ.normaliseLambdaRequest(event);
  const response = new RES();

  try {
    //... open db connection, handle request etc ... 
    const resp = await handleEvent(request, response);
    // response.respond(<status-code>, <response-body>, <headers>);
    // eg. response.respond(200, JSON.stringify({test: 1}), { 'content-type': 'application/json' });
    return LambdaResponseFormatter.responseHandler(resp);
  } catch (e) {
    return LambdaResponseFormatter.errorHandler(e);
  }
};

LambdaResponseFormatter middleware

To handle the clean up operations before responding. such as close db connection etc...

const LambdaResponseFormatter = require('@itcutives/serverless-helpers/src/lambdaResponseFormatter');

class ResponseHandler extends LambdaResponseFormatter {
  static async middleware(response) {
    // add remove header etc.
    // close db connection
    return true;
  }
}

module.exports = ResponseHandler;

Once you have above, your handler function should use ResponseHandler class instead of LambdaResponseFormatter

boom-to-jsonapi

Require

const boomToJsonAPI = require('@itcutives/serverless-helpers/src/boom-to-jsonapi');

Unclassified Error

boomToJsonAPI(new Error('random error'));
// {
//   errors: [{
//     status: '500',
//     title: 'Internal Server Error',
//     detail: 'An internal server error occurred',
//     code: undefined
//   }]
// }

Boom Error

boomToJsonAPI(Boom.badRequest('BAD Request'));
// {
//   errors: [{
//     status: '400',
//     title: 'Bad Request',
//     detail: 'BAD Request',
//     code: undefined
//   }]
// }

Boom Error with Code

boomToJsonAPI(Boom.badRequest('CODE :Some Error:it happened'));
// {
//   errors: [{
//     status: '400',
//     title: 'Bad Request',
//     detail: 'Some Error:it happened',
//     code: 'CODE'
//   }]
// }

Example

cd example
# install dependencies
npm i
# run api offline
npm run offline

• to see Success Response: http://localhost:3000/v1/success

• to see Error Response: http://localhost:3000/v1/error