Merge commit 'rails/3-0-unstable'

Conflicts:

	actionpack/lib/action_controller/base.rb
	actionpack/lib/action_dispatch/http/mime_type.rb
	actionpack/lib/action_dispatch/http/request.rb
	actionpack/lib/action_view/base.rb
	actionpack/lib/action_view/paths.rb
	actionpack/test/controller/session/cookie_store_test.rb
	actionpack/test/dispatch/rack_test.rb
	actionpack/test/dispatch/request_test.rb

1 files changed, 51 insertions, 0 deletions

diff --git a/actionpack/lib/action_dispatch/middleware/session/mem_cache_store.rb b/actionpack/lib/action_dispatch/middleware/session/mem_cache_store.rb
new file mode 100644
index 0000000000..8f448970d9
--- /dev/null
+++ b/actionpack/lib/action_dispatch/middleware/session/mem_cache_store.rb
@@ -0,0 +1,51 @@
+begin
+  require_library_or_gem 'memcache'
+
+  module ActionDispatch
+    module Session
+      class MemCacheStore < AbstractStore
+        def initialize(app, options = {})
+          # Support old :expires option
+          options[:expire_after] ||= options[:expires]
+
+          super
+
+          @default_options = {
+            :namespace => 'rack:session',
+            :memcache_server => 'localhost:11211'
+          }.merge(@default_options)
+
+          @pool = options[:cache] || MemCache.new(@default_options[:memcache_server], @default_options)
+          unless @pool.servers.any? { |s| s.alive? }
+            raise "#{self} unable to find server during initialization."
+          end
+          @mutex = Mutex.new
+
+          super
+        end
+
+        private
+          def get_session(env, sid)
+            sid ||= generate_sid
+            begin
+              session = @pool.get(sid) || {}
+            rescue MemCache::MemCacheError, Errno::ECONNREFUSED
+              session = {}
+            end
+            [sid, session]
+          end
+
+          def set_session(env, sid, session_data)
+            options = env['rack.session.options']
+            expiry  = options[:expire_after] || 0
+            @pool.set(sid, session_data, expiry)
+            return true
+          rescue MemCache::MemCacheError, Errno::ECONNREFUSED
+            return false
+          end
+      end
+    end
+  end
+rescue LoadError
+  # MemCache wasn't available so neither can the store be
+end