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Contents
# Volt::MiddlewareStack provides an interface where app code can add custom
# rack middleware. Volt.current_app.middleware returns an instance of
# Volt::MiddlewareStack, and apps can call #use to add in more middleware.
module Volt
class MiddlewareStack
attr_reader :middlewares
def initialize
# Setup the next app
@middlewares = []
end
def use(*args, &block)
@middlewares << [args, block]
# invalidate builder, so it gets built again
@builder = nil
end
def map(path, &block)
@middlewares << [:map, path, block]
# invalidate builder
@builder = nil
end
def run(app)
@app = app
end
# Builds a new Rack::Builder with the middleware and the app
def build
@builder = Rack::Builder.new
@middlewares.each do |middleware|
if middleware[0] == :map
@builder.map(middleware[1], &middleware[2])
else
@builder.use(*middleware[0], &middleware[1])
end
end
@builder.run(@app)
end
def call(env)
unless @builder
build
end
@builder.call(env)
end
end
end
Version data entries
27 entries across 27 versions & 1 rubygems