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Rack::Cache =========== Rack::Cache is suitable as a quick drop-in component to enable HTTP caching for Rack-based applications that produce freshness (Expires, Cache-Control) and/or validation (Last-Modified, ETag) information: * Standards-based (RFC 2616) * Freshness/expiration based caching * Validation (If-Modified-Since / If-None-Match) * Vary support * Cache-Control: public, private, max-age, s-maxage, must-revalidate, and proxy-revalidate. * Portable: 100% Ruby / works with any Rack-enabled framework * Configuration language for advanced caching policies * Disk, memcached, and heap memory storage backends For more information about Rack::Cache features and usage, see: http://tomayko.com/src/rack-cache/ Rack::Cache is not overly optimized for performance. The main goal of the project is to provide a portable, easy-to-configure, and standards-based caching solution for small to medium sized deployments. More sophisticated / high-performance caching systems (e.g., Varnish, Squid, httpd/mod-cache) may be more appropriate for large deployments with significant throughput requirements. Status ------ Rack::Cache is a young and experimental project that is likely to change substantially and may not be wholly functional, consistent, fast, or correct. The current focus is on reaching basic compliance with RFC 2616 and providing good documentation. Installation ------------ From Gem: $ sudo gem install rack-cache With a local working copy: $ git clone git://github.com/rtomayko/rack-cache.git $ rake package && sudo rake install Basic Usage ----------- Rack::Cache is implemented as a piece of Rack middleware and can be used with any Rack-based application. If your application includes a rackup (`.ru`) file or uses Rack::Builder to construct the application pipeline, simply require and use as follows: require 'rack/cache' use Rack::Cache, :metastore => 'file:/var/cache/rack/meta', :entitystore => 'file:/var/cache/rack/body', :verbose => true run app Assuming you've designed your backend application to take advantage of HTTP's caching features, no further code or configuration is required for basic caching. Links ----- Documentation: http://tomayko.com/src/rack-cache/ Mailing List: http://groups.google.com/group/rack-cache GitHub: http://github.com/rtomayko/rack-cache/ License ------- Copyright (c) 2008 Ryan Tomayko <http://tomayko.com/about> Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.