How can I check that the nginx gzip_static module is working?

Question

How can I check that nginx is serving the .gz version of static files, if they exist?

I compiled nginx with the gzip static module, but I don\'t see any mention of the .

Answer 1

There is some hint I've noticed regarding ETag response header.

If static file is served by nginx, then header looks like this: ETag: "135a-BQhu6KL71dyeCXcVZme6ug", however, when nginx is compressing the response (through gzip module) it looks like this: ETag: W/"135a-BQhu6KL71dyeCXcVZme6ug" (notice W/).

You can use this as well as Content-Encoding: gzip to distinguish plain static files, pre-compressed static files, and files compressed on the fly.