为什么我在mod_pagespeed中获得了PNG的404

Question

I have a small problem with the mod_pagespeed module in Wordpress on Apache server. I'm getting a 404 related only to PNG images, but not always, not for all and not even for the same images. Automatically, sometimes you see, sometimes not instead.

When it happens, i try to disable the mod_pagespeed inserting ?ModPagespeed=off , and magically PNG images appear correctly.

Always when it happens, hanging on the URL ?ModPagespeed=on&ModPagespeedFilters= you see the PNG images.

Again you see the PNG also enabling a filter at a time with for example:

?ModPagespeed=on&ModPagespeedFilters=extend_cache .

At this point, i think that it might be a problem of RewriteCond in .htaccess file. So, i put the exception:

RewriteCond %{REQUEST_URI} !pagespeed

under:

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d

But still doesn't work. Do i also hang it with the basic rules of Wordpress? That are the follow:

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]

What do you think?

Thanks in advance

Answer 1

Your RewriteCond:

RewriteCond %{REQUEST_URI} !pagespeed

has two problems with it.

First, QUERY_STRING is a separate variable from REQUEST_URI, and so your REQUEST_URI doesn't in fact contain pagespeed.

Second, it's case sensitive.

So I believe what you meant was

RewriteCond %{QUERY_STRING} Pagespeed

Note if you're unsure of the case of the string, or if it could be either, you can use the [NC] flag on the end of RewriteCond to indicate that it's case insensitive.