url

Validates the value to be formatted as a valid URL string.

import { schema, rules } from '@ioc:Adonis/Core/Validator'

{
  website: schema.string([
    rules.url()
  ])
}

Along with the format validation, you can also enforce the url to be from a certain domain. For example:

{
  twitterProfile: schema.string([
    rules.url({
      // Only twitter.com urls are allowed
      allowedHosts: ['twitter.com']
    })
  ])
}

The inverse of allowedHosts is the bannedHosts.

{
  website: schema.string([
    rules.url({
      bannedHosts: [
        'acme.com',
        'example.com'
      ]
    })
  ])
}

Validation options

Following is the list of options for validate a URL string

{
  website: schema.string([
    rules.url({
      protocols: ['http', 'https', 'ftp'],
      requireTld: true,
      requireProtocol: false,
      requireHost: true,
      allowedHosts: [],
      bannedHosts: [],
      validateLength: false
    })
  ])
}

Option	Description
`protocols`	An array of allowed protocols ("http", "https", or "ftp"). Defining protocols will implicitly set the `requireProtocol` option to `true`.
`requireTld`	Ensure the tld is present in the URL. Defaults to `true`
`requireProtocol`	Ensure the URL has protocol defined. Defaults to `false`
`requireHost`	Ensure the URL has the host defined. Defaults to `true`
`allowedHosts`	An array of allowed hosts. URLs outside the defined hosts will fail the validation.
`bannedHosts`	An array of banned hosts. URLs matching the defined hosts will fail the validation.
`validateLength`	Validate the length of the URL to be under or equal to 2083 charcters. Defaults to `true`.

Normalizing url

You can normalize the URL using the rules.normalizeUrl method.

{
  website: schema.string([
    rules.url(),
    rules.normalizeUrl({
      ensureProtocol: 'https',
      stripWWW: true,
    })
  ])
}

Option	Description
`ensureProtocol`	The property ensures that the URL post validation has `https` protocol
`stripWWW`	Strips the `www` from the URL