koa-validator

Koa.js middleware that adds validation functionality.

This module is heavily inspired by express-validator. It´s purpose is to extend Context with validation methods taken from validator.js

Install

npm install koa_validator 

Usage

var koa = require('koa');
var bodyParser = require('koa-body-parser');
var koaValidator = require('koa_validator');
var app = koa();

app.use(bodyParser());

app.use(koaValidator());

app.use(function *(next){
	this.checkQuery('getparam', 'Invalid getparam').isInt().notEmpty();
	this.checkParams('urlparam', 'No url param').notEmpty();
	this.checkBody('postParam', 'Invalid postparam').isAlpha();
	this.body = this.validationErrors();
	yield next;
});

app.listen(3000);

Running example

Clone the repo, install dependencies and start the server

    $ git clone git://github.com/mikaelharsjo/koa-validator.git --depth 1
    $ cd koa-validator
    $ npm install
    $ npm start

Some sample urls to try with

    $ curl http://localhost:3000/test?getparam=test
    -> [{"param":"getparam","msg":"Invalid getparam","value":"test"}]
    
    $ curl -d 'postparam=1' http://localhost:3000/test?getparam=1
    -> [ { param: 'postparam', msg: 'Invalid postparam', value: '1' } ]        

Running tests

    $ npm test

License

MIT