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.
# File lib/rack/utils.rb, line 361 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
# File lib/rack/utils.rb, line 366 def call(env) @for.context(env, @app) end
# File lib/rack/utils.rb, line 374 def context(env, app=@app) recontext(app).call(env) end
# File lib/rack/utils.rb, line 370 def recontext(app) self.class.new(@for, app) end