î ªÍX³ã@sVddlmZddlmZddlmZmZmZGdd„deƒZdS)é)Úget_conditional_response)ÚMiddlewareMixin)Ú http_dateÚparse_http_date_safeÚ unquote_etagc@s"eZdZdZdd„ZdS)ÚConditionalGetMiddlewarea Handles conditional GET operations. If the response has an ETag or Last-Modified header, and the request has If-None-Match or If-Modified-Since, the response is replaced by an HttpNotModified. Also sets the Date and Content-Length response-headers. cCs¨tƒ|d<|j rC|jdƒ rCtt|jƒƒ|ds