Class: Rack::Cascade

### Home Classes Methods

### In Files

- lib/rack/cascade.rb

### Parent

Object

### Methods

- ::new
- #<<
- #add
- #call
- #include?

### Files

- KNOWN-ISSUES
- README
- SPEC

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No matching classes.

# 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) click to toggle source

    # File lib/rack/cascade.rb, line 11
    def initialize(apps, catch=404)
      @apps = []; @has_app = {}
      apps.each { |app| add app }

      @catch = {}
      [*catch].each { |status| @catch[status] = true }
    end

### Public Instance Methods

<<(app) click to toggle source
Alias for: add
add(app) click to toggle source

    # File lib/rack/cascade.rb, line 30
    def add app
      @has_app[app] = true
      @apps << app
    end

Also aliased as: <<
call(env) click to toggle source

    # File lib/rack/cascade.rb, line 19
    def call(env)
      result = NotFound

      @apps.each do |app|
        result = app.call(env)
        break unless @catch.include?(result[0].to_i)
      end

      result
    end

include?(app) click to toggle source

    # File lib/rack/cascade.rb, line 35
    def include? app
      @has_app.include? app
    end

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