Basic Auth Middleware

This middleware can apply Basic authentication to a specified path. Implementing Basic authentication with Cloudflare Workers or other platforms is more complicated than it seems, but with this middleware, it's a breeze.

For more information about how the Basic auth scheme works under the hood, see the MDN docs.

Import

npm

import { Hono } from 'hono'
import { basicAuth } from 'hono/basic-auth'

Deno

import { Hono } from 'https://deno.land/x/hono/mod.ts'
import { basicAuth } from 'https://deno.land/x/hono/middleware.ts'

Usage

const app = new Hono()

app.use(
  '/auth/*',
  basicAuth({
    username: 'hono',
    password: 'acoolproject',
  })
)

app.get('/auth/page', (c) => {
  return c.text('You are authorized')
})

To restrict to a specific route + method:

const app = new Hono()

app.get('/auth/page', (c) => {
  return c.text('Viewing page')
})

app.delete('/auth/page', basicAuth({ username: 'hono', password: 'acoolproject' }), (c) => {
  return c.text('Page deleted')
})

If you want to verify the user by yourself, specify the verifyUser option; returning true means it is accepted.

const app = new Hono()

app.use(
  basicAuth({
    verifyUser: (username, password, c) => {
      return username === 'dynamic-user' && password === 'hono-password'
    },
  })
)

Options

• username: string - required
  • The username of the user who is authenticating
• password: string - required
  • The password value for the provided username to authenticate against
• verifyUser: (username: string, password: string, c: Context) => boolean | Promise<boolean>
  • The function to verify the user
• realm: string
  • The domain name of the realm, as part of the returned WWW-Authenticate challenge header. Default is "Secure Area"
  • See: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/WWW-Authenticate#directives
• hashFunction: Function
  • A function to handle hashing for safe comparison of passwords

More Options

...users: { username: string, password: string }[]

Recipes

Defining Multiple Users

This middleware also allows you to pass arbitrary parameters containing objects defining more username and password pairs.

app.use(
  '/auth/*',
  basicAuth(
    {
      username: 'hono',
      password: 'acoolproject',
      // Define other params in the first object
      realm: 'www.example.com',
    },
    {
      username: 'hono-admin',
      password: 'super-secure',
      // Cannot redefine other params here
    },
    {
      username: 'hono-user-1',
      password: 'a-secret',
      // Or here
    }
  )
)

Or less hardcoded:

import { users } from '../config/users'

app.use(
  '/auth/*',
  basicAuth(
    {
      realm: 'www.example.com',
      ...users[0],
    },
    ...users.slice(1)
  )
)