Class: Hostrich

Inherits:
Object
  • Object
show all
Defined in:
lib/hostrich.rb,
lib/hostrich/version.rb

Constant Summary collapse

VERSION = 
'0.2.0'
@@hosts = 
[]

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(app, hosts = []) ⇒ Hostrich

Returns a new instance of Hostrich.



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# File 'lib/hostrich.rb', line 16

def initialize(app, hosts = [])
  @app = app
  @@hosts += Array(hosts)
end

Class Method Details

.hosts ⇒ Object 



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# File 'lib/hostrich.rb', line 8

def self.hosts
  @@hosts
end

.hosts=(array) ⇒ Object 



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# File 'lib/hostrich.rb', line 12

def self.hosts=(array)
  @@hosts = array
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/hostrich.rb', line 21

def call(env)
  return @app.call(env) if @@hosts.empty?

  # Extract suffix from current request host.
  match = nil
  @@hosts.detect { |host| match = env['HTTP_HOST'].match(/#{host}(\.[\.\w-]+)?/) }
  return @app.call(env) if match.nil?

  suffix = match[1]

  # Fake request host.
  # Eg. If request is made from http://example.com.dev or http://example.com.127.0.0.1.xip.io,
  # the Rack app will see it just as a request to http://example.com.
  env['HTTP_HOST']   = remove_suffix(env['HTTP_HOST'], suffix)
  env['SERVER_NAME'] = remove_suffix(env['SERVER_NAME'], suffix)

  # Get regular response from Rack app
  status, headers, body = @app.call(env)
  body.close if body.respond_to? :close

  chunks = []
  body.each { |chunk| chunks << chunk.to_s }
  body = chunks.join

  # Add current host suffix in all response bodies, so that occurences of http://example.com
  # appear as http://example.com.dev or http://example.com.127.0.0.1.xip.io in the browser.
  body = [add_suffix(body, suffix)]

  # Do the same in response headers. This is important for cookies and redirects.
  headers = Hash[headers.map { |k,v| [k, add_suffix(v, suffix)] }]

  # Return hacked response
  [status, headers, body]
end