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 322

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 320

def app
  @app
end

#for ⇒ Object (readonly)

Returns the value of attribute for.



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# File 'lib/rack/utils.rb', line 320

def for
  @for
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/rack/utils.rb', line 327

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

#context(env, app = @app) ⇒ Object 



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# File 'lib/rack/utils.rb', line 335

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

#recontext(app) ⇒ Object 



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# File 'lib/rack/utils.rb', line 331

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