class Rack::PactBroker::Cascade
Constants
- NotFound
deprecated, no longer used
Attributes
apps[R]
An array of applications to try in order.
Public Class Methods
new(apps, cascade_for = [404, 405])
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Set the apps to send requests to, and what statuses result in cascading. Arguments:
apps: An enumerable of rack applications. cascade_for: The statuses to use cascading for. If a response is received
from an app, the next app is tried.
# File lib/rack/pact_broker/cascade.rb, line 32 def initialize(apps, cascade_for = [404, 405]) @apps = [] apps.each { |app| add app } @cascade_for = {} [*cascade_for].each { |status| @cascade_for[status] = true } end
Public Instance Methods
add(app)
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Append an app to the list of apps to cascade. This app will be tried last.
# File lib/rack/pact_broker/cascade.rb, line 75 def add(app) @apps << app end
Also aliased as: <<
call(env)
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Call each app in order. If the responses uses a status that requires cascading, try the next app. If all responses require cascading, return the response from the last app.
# File lib/rack/pact_broker/cascade.rb, line 43 def call(env) return [404, { CONTENT_TYPE => "text/plain" }, []] if @apps.empty? result = nil last_body = nil @apps.each_with_index do |app, i| # 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) puts result.last # If it is a 404/403 AND the response body is empty, then try the next app if @cascade_for.include?(result[0].to_i) && result[2].respond_to?(:empty?) && result[2].empty? last_body = result[2] else puts "returned from #{i} of #{@apps.size}" # otherwise, return the result return result end end result end
include?(app)
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Whether the given app is one of the apps to cascade to.
# File lib/rack/pact_broker/cascade.rb, line 80 def include?(app) @apps.include?(app) end