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.



19
20
21
22
23
24
25
26
 
# File 'lib/faye/adapters/rack_adapter.rb', line 19

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 



28
29
30
 
# File 'lib/faye/adapters/rack_adapter.rb', line 28

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

#call(env) ⇒ Object 



45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
 
# File 'lib/faye/adapters/rack_adapter.rb', line 45

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 = request.post? ? request.body.read : request.params['message']
    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 



36
37
38
 
# File 'lib/faye/adapters/rack_adapter.rb', line 36

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

#listen(port) ⇒ Object 



40
41
42
43
 
# File 'lib/faye/adapters/rack_adapter.rb', line 40

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

#remove_extension(extension) ⇒ Object 



32
33
34
 
# File 'lib/faye/adapters/rack_adapter.rb', line 32

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