What are the numbers after the HTTP status codes in App Engine's dev_appserver.py logs?

Question

When I run dev_appserver.py locally I see messages like this:

INFO     2014-01-05 02:19 ... default: "GET / HTTP/1.1" 200 793
INFO     2014-01-05 02:19 ... default: "GET /static/css/style.css HTTP/1.1" 200 1253
INFO     2014-01-05 02:20 ... default: "GET / HTTP/1.1" 200 801
...

What do the numbers at the end of the lines represent? In this case 793, 1253, 801?

Answer 1

Following the Apache common log format convention, those numbers are the Content-Lengths of the respective responses.

If you're curious, look in the SDK in lib/cherrypy/cherrypy/_cplogging.py in access() (~line 207).