Class: Faye::RackAdapter

Inherits:
Object
  • Object
show all
Defined in:
lib/faye/adapters/rack_adapter.rb

Defined Under Namespace

Classes: DeferredBody

Constant Summary collapse

ASYNC_RESPONSE =

Only supported under Thin

[-1, {}, []].freeze
DEFAULT_ENDPOINT = 
'/bayeux'
SCRIPT_PATH = 
File.join(ROOT, 'faye-browser-min.js')
TYPE_JSON = 
{'Content-Type' => 'application/json'}
TYPE_SCRIPT = 
{'Content-Type' => 'text/javascript'}
TYPE_TEXT = 
{'Content-Type' => 'text/plain'}

Instance Method Summary collapse

Constructor Details

#initialize(app = nil, options = nil) ⇒ RackAdapter

Returns a new instance of RackAdapter.



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# File 'lib/faye/adapters/rack_adapter.rb', line 20

def initialize(app = nil, options = nil)
  @app      = app if app.respond_to?(:call)
  @options  = [app, options].grep(Hash).first || {}
  
  @endpoint    = @options[:mount] || DEFAULT_ENDPOINT
  @endpoint_re = Regexp.new('^' + @endpoint + '(/[^/]*)*(\\.js)?$')
  @server      = Server.new(@options)
end

Instance Method Details

#add_extension(extension) ⇒ Object 



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# File 'lib/faye/adapters/rack_adapter.rb', line 29

def add_extension(extension)
  @server.add_extension(extension)
end

#call(env) ⇒ Object 



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# File 'lib/faye/adapters/rack_adapter.rb', line 46

def call(env)
  Faye.ensure_reactor_running!
  request = Rack::Request.new(env)
  
  unless request.path_info =~ @endpoint_re
    env['faye.client'] = get_client
    return @app ? @app.call(env) :
                  [404, TYPE_TEXT, ["Sure you're not looking for #{@endpoint} ?"]]
  end
  
  if env['HTTP_UPGRADE'] == 'WebSocket'
    return handle_upgrade(request)
  end
  
  if request.path_info =~ /\.js$/
    return [200, TYPE_SCRIPT, File.new(SCRIPT_PATH)]
  end
  
  begin
    json_msg = message_from_request(request)
    message  = JSON.parse(json_msg)
    jsonp    = request.params['jsonp'] || JSONP_CALLBACK
    type     = request.get? ? TYPE_SCRIPT : TYPE_JSON
    callback = env['async.callback']
    body     = DeferredBody.new
    
    @server.flush_connection(message) if request.get?
    
    callback.call [200, type, body]
    
    @server.process(message, false) do |replies|
      response = JSON.unparse(replies)
      response = "#{ jsonp }(#{ response });" if request.get?
      body.succeed(response)
    end
    
    ASYNC_RESPONSE
    
  rescue
    [400, TYPE_TEXT, 'Bad request']
  end
end

#get_client ⇒ Object 



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# File 'lib/faye/adapters/rack_adapter.rb', line 37

def get_client
  @client ||= Client.new(@server)
end

#listen(port) ⇒ Object 



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# File 'lib/faye/adapters/rack_adapter.rb', line 41

def listen(port)
  handler = Rack::Handler.get('thin')
  handler.run(self, :Port => port)
end

#remove_extension(extension) ⇒ Object 



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# File 'lib/faye/adapters/rack_adapter.rb', line 33

def remove_extension(extension)
  @server.remove_extension(extension)
end