42 lines
771 B
Ruby
42 lines
771 B
Ruby
module Rack
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# Rack::Cascade tries an request on several apps, and returns the
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# first response that is not 404 (or in a list of configurable
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# status codes).
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class Cascade
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NotFound = [404, {}, []]
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attr_reader :apps
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def initialize(apps, catch=404)
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@apps = []; @has_app = {}
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apps.each { |app| add app }
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@catch = {}
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[*catch].each { |status| @catch[status] = true }
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end
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def call(env)
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result = NotFound
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@apps.each do |app|
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result = app.call(env)
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break unless @catch.include?(result[0].to_i)
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end
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result
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end
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def add app
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@has_app[app] = true
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@apps << app
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end
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def include? app
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@has_app.include? app
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end
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alias_method :<<, :add
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end
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end
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