I'm wondering if there's a way to discern if the content has been modified by MPS. Ideally, I'd like to see a header that lists the filters used on a particular request.

[Chris Bichler]

[Jan-Willem Maessen]

Hi Chris -

We don't add headers indicating what filters operated on your page, but there are a few things you can do to see what happened (this is what I do when assessing what rewriting had occurred on a page):

1) Look for .pagespeed. resources, as those are a sure sign that those resources were rewritten or (in the case of .ce. urls) cache extended.

2) Turn on the debug filter, usually by using the query parameter ?PageSpeedFilters=+debug on your url.  This will add comments indicating some of what happened when rewriting your page, and will also inject un-mangled JavaScript code if you have the appropriate filters switched on.

Note that "make +debug better" is on our TODO list at the moment, because it doesn't yet tell you everything you (or we) might like to know.

-Jan

On Tue, Aug 13, 2013 at 4:14 PM, Chris Bichler <the...@gmail.com> wrote:

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