Multi Domains for SilverStripe

Allows multiple domains to access one CMS instance, mapping them to different sections of the hierarchy, which allows for vanity URLs. Examples:

• example.com -> resolves to home page
• example.com/shop/store -> Resolves to a Store page
• example-store.com -> Shows content for example.com/shop/store.
• example-store.com/checkout -> Shows content for example.com/shop/store/checkout

Requirements

• silverstripe/framework ^4.0

Configuration

Each domain is identified by a key. You must define one domain using the primary key to mark it as the primary domain.

---
Name: mymultidomain
After: '#multidomain'
---
SilverStripe\MultiDomain\MultiDomain:
  domains:
    primary:
      hostname: 'example.com'
    store:
      hostname: 'example-store.com'
      resolves_to: 'shop/store'

Options

allow_subdomains: If true, domain matching is subdomain agnostic, so that anything.example.com still maps to example.com, the primary domain in the above configuration.

Whitelisting

Sometimes you may have routes that should resolve normally, and bypass the multidomain filter. In this case, for any given domain, you can specify an allow list.

---
Name: mymultidomain
After: '#multidomain'
---
SilverStripe\MultiDomain\MultiDomain:
  domains:
    primary:
      hostname: 'example.com'
    store:
      hostname: 'example-store.com'
      resolves_to: 'shop/store'
      allow:
        - 'admin/*'
        - 'Security/*'
        - 'my-custom-webhook/'

In the above example, any URL beginning with admin/, Security/ or matching my-custom-webhook/ will resolve on any domain.

Global whitelists

You can put your allow node directly under MultiDomain to have a global whitelist.

---
Name: mymultidomain
After: '#multidomain'
---
SilverStripe\MultiDomain\MultiDomain:
  allow:
    - 'admin/*'
    - 'Security/*'
    - 'my-custom-webhook/'

Forcing URLs to specific domains

Sometimes, you may have a page that sits outside the node representing a domain, but you still want it to be considered part of that domain. For this, you can use the force option.

---
Name: mymultidomain
After: '#multidomain'
---
SilverStripe\MultiDomain\MultiDomain:
  domains:
    primary:
      hostname: 'example.com'
    store:
      hostname: 'example-store.com'
      resolves_to: 'shop/store'
      force:
        - 'buy-now/*'

In the above configuration, the page buy-now can live in the site root, but the URL example-store.com/buy-now will nonetheless resolve the page, even though the page isn't under shop/store.

Using environment variables

If you have multiple test environments, it may not make sense for you to hard code the host name in the config. Alternatively, you can define an environment variable, i.e. a constant, and refer to it as a string in the config.

---
Name: mymultidomain
After: '#multidomain'
Only:
  environment: 'test'
---
SilverStripe\MultiDomain\MultiDomain:
  domains:
    primary:
      hostname: STAGING_PRIMARY_HOSTNAME
    store:
      hostname: STAGING_STORE_HOSTNAME
      resolves_to: 'shop/store'
      force:
        - 'buy-now/*'

This way, every environment can declare its hostname independently.

Why not subsites?

Subsites creates a parallel CMS instance for a given domain name. This module allows you to map domains to a specific section of the hierarchy, in the context of all your other pages.

Why not "homepage for domain"?

That works to create a vanity URL for one page, but as soon as you go deeper into the hierarchy, you return to the native URL. A more robust solution is required for persisting the vanity URLs.

Further, this module is more extensible, allowing for collaboration with other URL-hungry modules, such as Translatable or Fluent.