Class: Rack::Cascade
- Inherits:
-
Object
- Object
- Rack::Cascade
- Defined in:
- rack/rack/cascade.rb
Overview
Rack::Cascade tries a request on several apps, and returns the first response that is not 404 or 405 (or in a list of configurable status codes).
Constant Summary
- NotFound =
[404, {"Content-Type" => "text/plain"}, []]
Instance Attribute Summary (collapse)
-
- (void) apps
readonly
Returns the value of attribute apps.
Instance Method Summary (collapse)
- - (void) add(app) (also: #<<)
- - (void) call(env)
- - (Boolean) include?(app)
-
- (Cascade) initialize(apps, catch = [404, 405])
constructor
A new instance of Cascade.
Constructor Details
- (Cascade) initialize(apps, catch = [404, 405])
Returns a new instance of Cascade
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# File 'rack/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 |
Instance Attribute Details
- (void) apps (readonly)
Returns the value of attribute apps
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# File 'rack/rack/cascade.rb', line 9 def apps @apps end |
Instance Method Details
- (void) add(app) Also known as: <<
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# File 'rack/rack/cascade.rb', line 41 def add app @has_app[app] = true @apps << app end |
- (void) call(env)
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# File 'rack/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 |
- (Boolean) include?(app)
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# File 'rack/rack/cascade.rb', line 46 def include? app @has_app.include? app end |