import sys content_type = 'image/png' filename = 'logo_uWSGI.png' try: filename = sys.argv[1] except IndexError: pass try: content_type = sys.argv[2] except IndexError: pass def application(environ, start_response): start_response('200 OK', [('Content-Type', content_type)]) fd = open(filename) yield environ['wsgi.file_wrapper'](fd, 32*1024)