ó K~‰Pc@s0ddlmZmZdefd„ƒYZdS(iÿÿÿÿ(t http_datetparse_http_date_safetConditionalGetMiddlewarecBseZdZd„ZRS(s Handles conditional GET operations. If the response has a 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