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.


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# File 'lib/rack/utils.rb', line 487

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

#app ⇒ Object (readonly)

Returns the value of attribute app.


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# File 'lib/rack/utils.rb', line 485

def app
  @app
end

#for ⇒ Object (readonly)

Returns the value of attribute for.


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# File 'lib/rack/utils.rb', line 485

def for
  @for
end

Instance Method Details

#call(env) ⇒ Object 


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# File 'lib/rack/utils.rb', line 492

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

#context(env, app = @app) ⇒ Object 


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# File 'lib/rack/utils.rb', line 500

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

#recontext(app) ⇒ Object 


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# File 'lib/rack/utils.rb', line 496

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