Valory

A server agnostic web framework for creating bulletproof apis

Contents

• Documentation
• Example Project
• Description
• Installation
• Basic Usage
• Extensions
• Contributions
• Acknowledgements

Description

Valory is small framework designed to standardize the process of writing well documented, bulletproof api's using whatever server backend you want.

What it do

• First class Typescript support with decorator based API
• Uses existing type structures to build out your API
• Automatically generates Open API 3 documentation
• Performs super fast input validations for requests
• Modular adaptor system that allows you to use anything that can send an event to NodeJS as a REST server

What it don't do

• Make you write your code and docs separately

Installation

If you are on windows, you will want to install Java 1.7+. Closure compiler will work without it, but will be slow.

Next, you'll need to add the Valory runtime to your project along with a server adaptor

npm install valory-runtime valory-adaptor-polka

Next, install the cli

npm i -g valory

# You can install it locally as well for build consistency
npm i -D valory

Lastly, you'll need to create a Valory project

# Run in your project dir and commit the valory.json file
valory init

Basic Usage

Using Valory is pretty straightforward.

index.ts

import {Valory, Swagger} from "valory-runtime";
import {PolkaAdaptor} from "valory-adaptor-polka"

// import our controller
import "./someController"

// import generated content
import "./generated"

// Define basic info for the api
const info: Swagger.Info = {
    title: "Test api",
    version: "1",
};

// Create the valory singleton
Valory.createInstance({
    info,
    server: new PolkaAdaptor({port: 8080}),
});

// Retrieve the valory instance (can be called anywhere)
const valoryInstance = Valory.getInstance();

// Build and start the app, passing any adaptor specific config data
valoryInstance.start();

someController.ts

import {Get, Route, Controller, Post, Body, Path, Header, SuccessResponse} from "valory-runtime";

export interface Item {
    someField: string;
    optionalField?: string;
    aNumber: number;
}

// Use fancy decorators to generate endpoints
@Route("base") export class SimpleController extends Controller {
    /**
     * Swagger endpoint description
     * @summary swagger summary
     */
    @Get("somepath") public someHandler() {
        return "Some response"
    }
    
    // Function arguments can be injected from request object   
    @Get("{name}") public async someOtherHandler(@Path() name: string, @Header() authorization: string): Promise<string> {
        return `name is ${name}`;
    }
    
    // You can set the status of a successful response 
    @SuccessResponse(418)
    // even complex types work    
    @Post("submit") public submit(@Body() input: Item): {content: Item} {
        
        // access request logger
        this.logger.info("yay!");
        
        return {
            content: input,
        }
    }
}

Once you have your api written, you have to compile it.

# Just run in your project dir next to your valory.json
valory compile

Now all you need to do is run it

# This will be adaptor specific
node path/to/api.js

# Valory provides an adaptor agnostic test command
valory test

Extensions

These are the officially maintained adaptors and middleware available for Valory.

Adaptors

• valory-adaptor-polka
  • Adaptor that uses polka (Smallest size)
• valory-adaptor-alb
  • Adaptor for directly processing events from an AWS Application Load Balancer

Contributions

PR's are welcome!

PR guidelines

• Use Angular Commit Guidelines
• Create an issue that explains the problem or feature
  • Get approval on the issue from a maintainer
• Create a PR the references the issue

Roadmap

• More comprehensive tests
• Additional adaptors

Acknowledgements

• Shoutout to TSOA. Decorator support in Valory is based on that project, huge :thumbsup: