I just spent a stupid amount of time trying to figure why [Nginx][nginx] was failing to cache my [Django][django] app responses. The Django app is running as a FastCGI backend and I have Nginx using the [`fastcgi_cache` directive][cache] to cache responses.
The answer is that [Nginx since version 0.8.44 does not cache backend responses if they have a “Set-Cookie” header]. This makes perfect sense because you don’t want a response which sets a cookie to be cached for subsequent requests, but I was stupid because I had totally forgotten that my Django app was using a POST form for all responses for non-authenticated clients (due to how [Django’s CSRF middleware][csrf] does its stuff).
The solution was to change the app so that it uses the GET method on the form in question, which in this case is fine from a security point-of-view.
The moral of this story is I should pay attention to my HTTP response headers and that I am badly short-sighted both figuratively and literally. With that fixed the site has gone from 15 requests per second to ~2000 requests per second!
[Pierre Igot][igot] complains about the font rendering on [Microsoft’s Office for Mac][macoffice] product pages:
> [Why does the web site promoting Microsoft Office for Mac OS X use, by default, a font that no Mac OS X user has on his or her system?][complain]
Well, the branding for Mac Office uses Segoe so it makes sense to keep that brand consistent across all the pages. But it was more of a rhetorical question, wasn’t it?
But Pierre has missed that the text is not displayed using a font specified by the stylesheet (he notes that he doesn’t have Segoe installed). What actually happens is it is rendered as canvas elements, one for each word.
This screenshot shows how well it works for large size text and poorly for the small text (taken in Google Chrome dev version). I’ve selected part of the text to demonstrate that it is “live”:
Pierre is right, the smaller headline text does look terrible for the very same visitors Microsoft wants to sell to. But I don’t mind too much because the whole site is much less of a useability nightmare since the re-design. Microsoft’s Mac Web designers aren’t entirely evil.