koa-x-router is a library that extends the functionality of @koa/router by providing validation and automatic API documentation features. It simplifies the process of defining routes, validating request data, and generating API documentation.
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Validation: With
koa-x-router, you can perform validation using various validation libraries. The library provides adapters such asJoiAdaptorandZodAdaptorthat allow you to define validation schemas using popular validation libraries likeJoiorZod. You can also implement your own custom adapter by implementing theXRouterAdaptorinterface. -
Automatic API Documentation:
koa-x-routerautomatically generates API documentation based on your route definitions. It extracts information about route paths, request methods, request/response data structures, and validation rules. The generated documentation can be accessed through an endpoint, making it convenient for developers to understand and consume your API.
You can install koa-x-router with joi using npm:
npm install koa @koa/router koa-x-router joior install with zod using npm:
npm install koa @koa/router koa-x-router zodnpm install @types/koa @types/koa__router -DTo use koa-x-router, import it and initialize it with an instance of @koa/router. Here's a basic example:
import Koa from "koa";
import bodyParser from "koa-bodyparser";
import Joi from "joi"
import { Router, JoiAdaptor, ZodAdaptor } from "koa-x-router";
const app = new Koa();
const router = new Router({
adaptors: [JoiAdaptor], // <== Important!
// adaptors: [ZodAdaptor], // If you want to use with Zod
// adaptors: [JoiAdaptor, ZodAdaptor], // or both
});
const docRouter = new Router();
// Define a route with validation
router.add({
method: "get",
path: "/users",
validate: {
query: Joi.object({
name: Joi.string(),
}),
output: {
200: {
body: Joi.array().items(
Joi.object({
name: Joi.string().required(),
age: Joi.number().positive().required(),
})
),
},
},
},
handler: async (ctx) => {
// code...
},
});
docRouter.get("/", (ctx) => {
ctx.body = `<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>API Documentation</title>
<link href="https://fonts.googleapis.com/css?family=Montserrat:300,400,700|Roboto:300,400,700" rel="stylesheet">
<style>body{margin: 0;padding: 0;}</style>
</head>
<body>
<redoc spec-url='/openapi.json' lazy-rendering></redoc>
<script src="https://cdn.jsdelivr.net/npm/redoc@next/bundles/redoc.standalone.js"></script>
</body>
</html>`;
});
docRouter.get("/openapi.json", (ctx) => {
ctx.body = router.generateOpenApiSpecJson({
info: {
title: "koa-x-router Demo API Docs",
version: "1.0.0",
},
});
});
app.use(docRouter.routes());
app.use(bodyParser());
app.use(router.routes());
app.listen(3000, () => {
console.log("Server listening on port 3000");
});You can also implement your custom adapter by implementing the XRouterAdaptor interface.
This allows you to use your preferred validation library for route validation.
Contributions are welcome! If you have any suggestions, bug reports, or feature requests, please open an issue.
This project is licensed under the Apache License 2.0.