get_session

# File actionpack/lib/action_dispatch/middleware/session/mem_cache_store.rb, line 27
        def get_session(env, sid)
          sid ||= generate_sid
          begin
            session = @pool.get(sid) || {}
          rescue MemCache::MemCacheError, Errno::ECONNREFUSED
            session = {}
          end
          [sid, session]
        end