Rack::Cache is suitable as a quick, drop-in component to enable HTTP caching for Rack-enabled applications that produce freshness (Expires, Cache-Control) and/or validation (Last-Modified, ETag) information.
Standards-based (RFC 2616 compliance)
Freshness/expiration based caching and validation
Supports HTTP Vary
Portable: 100% Ruby / works with any Rack-enabled framework
Disk, memcached, and heap memory storage backends
Create with default options:
require 'rack/cache' Rack::Cache.new(app, :verbose => true, :entitystore => 'file:cache')
Within a rackup file (or with Rack::Builder):
require 'rack/cache' use Rack::Cache do set :verbose, true set :metastore, 'memcached://localhost:11211/meta' set :entitystore, 'file:/var/cache/rack' end run app
Create a new Rack::Cache middleware component that fetches resources from the specified backend application. The options Hash can be used to specify default configuration values (see attributes defined in Rack::Cache::Options for possible key/values). When a block is given, it is executed within the context of the newly create Rack::Cache::Context object.
# File lib/rack/cache.rb, line 42 def self.new(backend, options={}, &b) Context.new(backend, options, &b) end
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