tcomb validation as koa middleware
A koa middleware that checks body/query request matches with tcomb type, if not valid, return standard 400 http code, or can be intercepted via koa global error handling.
Type: Function
a type defined with the tcomb library
Type: String
Default: body
request property to compare with type object, eg body/query
const Koa = require('koa')
const bodyParser = require('koa-bodyparser')
const validate = require('koa-tcomb-validation')
const Router = require('koa-router')
const app = new Koa()
const router = new Router()
const body = t.struct({
x: t.Number,
y: t.Number
})
// request body will be check
router.post('/', validate(body, 'body'), async (ctx, next) => {
ctx.status = 200
})
app.use(bodyParser())
// global middlewares
app.use(async (ctx, next) => {
// the parsed body will store in ctx.request.body
// if nothing was parsed, body will be an empty object {}
ctx.body = ctx.request.body
await next()
})
app.use(router.routes())
.use(router.allowedMethods())
app.listen(3000)