Class: Subdomainify::Middleware

Inherits:
Object
  • Object
show all
Defined in:
lib/subdomainify/middleware.rb

Overview

Private: Middleware for rewriting PATH_INFO from subdomain.

This is where URL rewriting magic takes place. It works by scanning routes for anything with :subdomainify option and take the route with highest precedence value (the “topmost” route) and use that as a base path.

For example, if we have these lines in routes:

resources :blogs, :subdomainify => true do
  resources :articles
  resources :comments
end

When user visited this URL:

http://foo.example.com/articles/hello-world

This middleware will rewrite PATH_INFO into:

/blogs/foo/articles/hello-world/

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ Middleware

Private: Initialize Rack Middleware.



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# File 'lib/subdomainify/middleware.rb', line 28

def initialize(app)
  @app = app
end

Instance Method Details

#call(env) ⇒ Object

Private: Rewrite PATH_INFO if appropriate and calls Rack application.



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# File 'lib/subdomainify/middleware.rb', line 33

def call(env)
  request = ActionDispatch::Request.new(env)
  routes = env['action_dispatch.routes']

  if request.subdomain.present? && request.subdomain != 'www'
    _route = routes.routes.select { |r| r.defaults[:subdomainify] }.last
    if !request.path_info.start_with?('/assets/') && _route.present?
      env['PATH_INFO'] = [
        _route.format(id: request.subdomain),
        request.path_info,
      ].select { |p| p.present? && p != '/' }.join('/').gsub(%r{//}, '/')
    end
  end

  @app.call(env)
end