1import os 2 3def application(env, start_response): 4 body = '' 5 vars = env.get('HTTP_X_VARIABLES').split(',') 6 7 for var in vars: 8 if var in os.environ: 9 body += str(os.environ[var]) + ',' 10 11 body = body.encode() 12 start_response('200', [('Content-Length', str(len(body)))]) 13 return body 14