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.



240
241
242
243
 
# File 'lib/rack/utils.rb', line 240

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.



238
239
240
 
# File 'lib/rack/utils.rb', line 238

def app
  @app
end

#for ⇒ Object (readonly)

Returns the value of attribute for.



238
239
240
 
# File 'lib/rack/utils.rb', line 238

def for
  @for
end

Instance Method Details

#call(env) ⇒ Object 



245
246
247
 
# File 'lib/rack/utils.rb', line 245

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

#context(env, app = @app) ⇒ Object 



253
254
255
 
# File 'lib/rack/utils.rb', line 253

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

#recontext(app) ⇒ Object 



249
250
251
 
# File 'lib/rack/utils.rb', line 249

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