Hono Validation

• Validation

Zod Validator

index.ts

import { Hono } from 'hono'
import { z } from 'zod'
import { validator } from 'hono/validator'

const schema = z.object({
  post: z.string(),
})

const app = new Hono()

app.post(
  '/posts',
  validator('json', (value, c) => {
    const parsed = schema.safeParse(value)
    if (!parsed.success) {
      return c.json({ message: 'Invalid' }, 400)
    }
    return parsed.data
  }),
  (c) => {
    const post = c.req.valid('json')

    return c.json(
      {
        message: 'Created!',
        post,
      },
      201,
    )
  },
)

export default app

REST Client

### Hono Zod Validator
POST http://localhost:3000/posts
Content-Type: application/json

{
    "post": "Hono🔥" 
}

HTTP/1.1 201 Created
Content-Type: application/json; charset=UTF-8
Date: ***, ** *** **** **:**:** ***
Content-Length: 49

{
  "message": "Created!",
  "post": {
    "post": "Hono🔥"
  }
}

Hono Zod Validator

• Zod Validator

index.ts

import { Hono } from 'hono'
import { z } from 'zod'
import { zValidator } from '@hono/zod-validator'

const schema = z.object({
  post: z.string(),
})

const app = new Hono()

app.post('/posts', zValidator('json', schema), (c) => {
  const post = c.req.valid('json')
  return c.json(
    {
      message: 'Created!',
      post,
    },
    201,
  )
})

export default app

REST Client

### Hono Zod Validator
POST http://localhost:3000/posts
Content-Type: application/json

{
    "post": "Hono🔥" 
}

HTTP/1.1 201 Created
Content-Type: application/json; charset=UTF-8
Date: ***, ** *** **** **:**:** ***
Content-Length: 49

{
  "message": "Created!",
  "post": {
    "post": "Hono🔥"
  }
}