First pass at Rack::Cache

1 files changed, 67 insertions, 0 deletions

diff --git a/actionpack/lib/action_dispatch/http/rack_cache.rb b/actionpack/lib/action_dispatch/http/rack_cache.rb
new file mode 100644
index 0000000000..e5914abc81
--- /dev/null
+++ b/actionpack/lib/action_dispatch/http/rack_cache.rb
@@ -0,0 +1,67 @@
+require "rack/cache"
+require "rack/cache/context"
+require "active_support/cache"
+
+module ActionDispatch
+  class RailsMetaStore < Rack::Cache::MetaStore
+    def self.resolve(uri)
+      new
+    end
+
+    # TODO: Finally deal with the RAILS_CACHE global
+    def initialize(store = RAILS_CACHE)
+      @store = store
+    end
+
+    def read(key)
+      @store.read(key) || []
+    end
+
+    def write(key, value)
+      @store.write(key, value)
+    end
+
+    def purge(key)
+      @store.delete(key)
+      nil
+    end
+
+    ::Rack::Cache::MetaStore::RAILS = self
+  end
+
+  class RailsEntityStore < Rack::Cache::EntityStore
+    def self.resolve(uri)
+      new
+    end
+
+    def initialize(store = RAILS_CACHE)
+      @store = store
+    end
+
+    def exist?(key)
+      @store.exist?(key)
+    end
+
+    def open(key)
+      @store.read(key)
+    end
+
+    def read(key)
+      body = open(key)
+      body.join if body
+    end
+
+    def write(body)
+      buf = []
+      key, size = slurp(body) { |part| buf << part }
+      @store.write(key, buf)
+      [key, size]
+    end
+
+    def purge(key)
+      @store.delete(key)
+    end
+
+    ::Rack::Cache::EntityStore::RAILS = self
+  end
+end