id,summary,reporter,owner,description,type,status,component,version,severity,resolution,keywords,cc,stage,has_patch,needs_docs,needs_tests,needs_better_patch,easy,ui_ux 23977,Add setdefault() to HttpResponse,Robert Coup,Sergey,"HttpResponse acts like a dictionary with respect to headers. It's a common middleware pattern to set headers ''unless'' they've been explicitly set by the view. eg. {{{ class MyMiddleware(object): def process_response(self, request, response): if not 'X-Test' in response: response['X-Test'] = 12345 return response }}} Having a `setdefault()` implementation would simplify this (not much in the trivial one-header case, but for example CORS middleware where you're setting a number of headers) {{{ class MyMiddleware(object): def process_response(self, request, response): response.setdefault('X-Test', 12345) return response }}} ",New feature,closed,HTTP handling,dev,Normal,fixed,,Дилян Палаузов,Ready for checkin,1,0,0,0,1,0