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.

Methods
C
N
R
Attributes
[R] app
[R] for
Class Public methods
new(app_f, app_r)
# File lib/rack/utils.rb, line 414
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 Public methods
call(env)
# File lib/rack/utils.rb, line 419
def call(env)
  @for.context(env, @app)
end
context(env, app=@app)
# File lib/rack/utils.rb, line 427
def context(env, app=@app)
  recontext(app).call(env)
end
recontext(app)
# File lib/rack/utils.rb, line 423
def recontext(app)
  self.class.new(@for, app)
end