Class: Rack::Utils::Context

Inherits:
Object
  • Object
show all
Defined in:
lib/rack/utils.rb

Overview

Context allows the use of a compatible middleware at different points in a request handling stack. A compatible middleware must define #context which should take the arguments env and app. The first of which would be the request environment. The second of which would be the rack application that the request would be forwarded to.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(app_f, app_r) ⇒ Context

Returns a new instance of Context.


450
451
452
453
# File 'lib/rack/utils.rb', line 450

def initialize(app_f, app_r)
  raise 'running context does not respond to #context' unless app_f.respond_to? :context
  @for, @app = app_f, app_r
end

Instance Attribute Details

#appObject (readonly)

Returns the value of attribute app.


448
449
450
# File 'lib/rack/utils.rb', line 448

def app
  @app
end

#forObject (readonly)

Returns the value of attribute for.


448
449
450
# File 'lib/rack/utils.rb', line 448

def for
  @for
end

Instance Method Details

#call(env) ⇒ Object


455
456
457
# File 'lib/rack/utils.rb', line 455

def call(env)
  @for.context(env, @app)
end

#context(env, app = @app) ⇒ Object


463
464
465
# File 'lib/rack/utils.rb', line 463

def context(env, app = @app)
  recontext(app).call(env)
end

#recontext(app) ⇒ Object


459
460
461
# File 'lib/rack/utils.rb', line 459

def recontext(app)
  self.class.new(@for, app)
end