class Rack::Cascade
Rack::Cascade tries an request on several apps, and returns the first response that is not 404 (or in a list of configurable status codes).
Constants
- NotFound
Attributes
apps[R]
Public Class Methods
new(apps, catch=[404, 405])
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# File lib/rack/cascade.rb, line 11 def initialize(apps, catch=[404, 405]) @apps = []; @has_app = {} apps.each { |app| add app } @catch = {} [*catch].each { |status| @catch[status] = true } end
Public Instance Methods
add(app)
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# File lib/rack/cascade.rb, line 41 def add app @has_app[app] = true @apps << app end
Also aliased as: <<
call(env)
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# File lib/rack/cascade.rb, line 19 def call(env) result = NotFound last_body = nil @apps.each do |app| # The SPEC says that the body must be closed after it has been iterated # by the server, or if it is replaced by a middleware action. Cascade # replaces the body each time a cascade happens. It is assumed that nil # does not respond to close, otherwise the previous application body # will be closed. The final application body will not be closed, as it # will be passed to the server as a result. last_body.close if last_body.respond_to? :close result = app.call(env) last_body = result[2] break unless @catch.include?(result[0].to_i) end result end
include?(app)
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# File lib/rack/cascade.rb, line 46 def include? app @has_app.include? app end