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37 lines
741 B
Ruby
37 lines
741 B
Ruby
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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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attr_reader :apps
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def initialize(apps, catch=404)
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@apps = apps
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@catch = [*catch]
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end
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def call(env)
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status = headers = body = nil
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raise ArgumentError, "empty cascade" if @apps.empty?
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@apps.each { |app|
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begin
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status, headers, body = app.call(env)
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break unless @catch.include?(status.to_i)
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end
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}
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[status, headers, body]
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end
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def add app
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@apps << app
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end
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def include? app
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@apps.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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