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Reply to topic   Topic: Problem to remove filter with FilterChain in mod_filter
Author
fleg



Joined: 25 Feb 2021
Posts: 1
Location: Paris

PostPosted: Thu 25 Feb '21 11:40    Post subject: Problem to remove filter with FilterChain in mod_filter Reply with quote

Hi,
I have an apache reverse proxy. I was using SetOutputFilter but I want to move to mod_filter.
Thus I declare a filter for proxy-html in the <VirtualHost> :
Code:

FilterDeclare proxyhtml
FilterProvider proxyhtml proxy-html  "%{CONTENT_TYPE} =~ m|^text/html|"
FilterChain +proxyhtml

So far so good. But for one of my site (grafana), proxy-html "corrects" the pages and remove some parts of the code then grafana fails. Thus I want for this site to remove the filter (but only for this site).
I tried :

Code:

<Location "/grafana/">
        FilterChain -proxyhtml
</Location>

but it doesn't work.
But if I do a :
Code:

<Location "/grafana/">
        FilterChain !
</Location>

it works ! What am I doing wrong ?
Back to top
tangent



Joined: 16 Aug 2020
Posts: 69
Location: UK

PostPosted: Thu 25 Feb '21 22:30    Post subject: Reply with quote

I can't explain why you can remove the entire filter chain, but not one filter. As an alternative, your could try putting the /grafana/ qualifier in your FilterProvider expression, viz.
Code:
FilterDeclare proxyhtml
FilterProvider proxyhtml proxy-html  "%{CONTENT_TYPE} =~ m|^text/html| && %{REQUEST_URI} !~ m|^/grafana/|"
FilterChain +proxyhtml
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