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Serverless GitHub API

A web service that fetches open pull request for a public repository. To fetch open pull request, add the gitHubRepo as a querystringParameters to the API Endpoint. Examples:

  • GET /github/prs?gitHubRepo=agenda/agenda
  • GET /github/prs?gitHubRepo=FrontendMasters/bootcamp

This project has been generated using the aws-nodejs-typescript template from the Serverless framework. For detailed instructions, please refer to the documentation.

Installation/deployment instructions

Required Software

  • Node.js
  • AWS CLI

Requirements: NodeJS lts/fermium (v.14.15.0). If using nvm, run nvm use to ensure you're using the same Node version in local and in your lambda's runtime. You will need a GitHub Personal Access Token and add it as an SSM Parameter. You will only need the access public repo permission for the access token.

Download or clone the repository and install the project.

git clone https://github.com/meddy672/serverless-github-api.git

Install project dependencies

npm install

Jest is used to execute unit test.

npm test

Project structure

The project code base is mainly located within the src folder. The main logic can be found in the handler.ts This folder is divided in:

  • functions - containing code base and configuration for your lambda functions
  • libs - containing shared code base between your lambdas
├── src
│   ├── functions               # Lambda configuration and source code folder
│   │   ├── pulls
│   │   │   ├── handler.ts      # `Pulls` lambda handler
│   │   │   └── handlePullRequestEvents.ts # `Pulls` handler logic
│   │   │   ├── axios.ts        # `Pulls` basic axios config
│   │   │   ├── index.ts        # `Pulls` lambda Serverless configuration
│   │   │   ├── mock.json       # `Pulls` lambda input parameter, if any, for local invocation
│   │   │   └── schema.ts       # `Pulls` lambda input event JSON-Schema
│   │   │
│   │   └── index.ts            # Import/export of all lambda configurations
│   │
│   └── libs                    # Lambda shared code
│       └── apiGateway.ts       # API Gateway specific helpers
│       └── handlerResolver.ts  # Sharable library for resolving lambda handlers
│       └── lambda.ts           # Lambda middleware
│       └── logger.ts           # Exports Winston logger
│       └── enums.ts            # Static assets used for application data
│       └── ssmClient.ts        # SSM Client to retrieve parameter values
|
├── test                        # Unit test
├── package.json
├── serverless.ts               # Serverless service file
├── tsconfig.json               # Typescript compiler configuration
├── tsconfig.paths.json         # Typescript paths
└── webpack.config.js           # Webpack configuration

3rd party libraries

  • json-schema-to-ts - uses JSON-Schema definitions used by API Gateway for HTTP request validation to statically generate TypeScript types in your lambda's handler code base
  • middy - middleware engine for Node.Js lambda. This template uses http-json-body-parser to convert API Gateway event.body property, originally passed as a stringified JSON, to its corresponding parsed object
  • @serverless/typescript - provides up-to-date TypeScript definitions for your serverless.ts service file