Koa Joi Validator

A simple validator for koa 2 application, inspired from koa-joi-validator, with Typescript supported

API

A koa middleware which will validate and transform the request

| param | type | required | description |
|-------|------|------------------|-------------|
| options | object | true | |
| options.type | string | Default to json | the coBody parser to call, can be json form or text |
| options.failure | int | (ctx: Context, err: ValidationError) => any | false | The error code or function to throw on case of validation error, default to 400 |
| options.options | {} | false | Options passed to Joi validator, such as allowUnknown |
| options.body | Joi.object | false | A joi schema validated against the request body |
| options.params | Joi.object | false | A joi schema validated against the request params |
| options.headers | Joi.object | false | A joi schema validated against the request headers |
| options.query | Joi.object | false | A joi schema validated against the request query |

Requirement

- NodeJS >= 7.6 is required.
- Joi

Installation

Install using npm:

``sh
npm install koa2-joi-validator joi
`




Usage

` es6
import { KoaJoiValidator } from "koa2-joi-validator";
import * as Joi from "joi";


router.post('/:number/:string/:date',
KoaJoiValidator({
type: 'json',
params: {
number: Joi.number().required(),
string: Joi.string().required(),
date: Joi.string().isoDate().required()
},
body: {
number: Joi.number().required(),
string: Joi.string().required(),
date: Joi.string().isoDate().required()
},
headers: Joi.object({
number: Joi.number().required(),
string: Joi.string().required(),
date: Joi.string().isoDate().required()
}).options({ allowUnknown: true }),
query: {
number: Joi.number().required(),
string: Joi.string().required(),
date: Joi.string().isoDate().required()
},
failure(ctx: Koa.Context, err: Joi.ValidationError) {
console.log(err);
ctx.throw(400);

}
}),
(ctx: Koa.Context) => {
expect(typeof ctx.params.number === 'number');
expect(typeof ctx.params.string === 'string');
expect(ctx.params.date instanceof Date);

['body', 'headers', 'query'].forEach((el) => {
expect(typeof ctx.request[el].number === 'number');
expect(typeof ctx.request[el].string === 'string');
expect(ctx.request[el].date instanceof Date);
});

ctx.status = 204;
},

);
``