Hi,
I am trying a reverse proxy server based on apache httpd v2.4 on the most recent release of CentOS:
# httpd -version
Server version: Apache/2.4.6 (CentOS)
Server built: Nov 14 2016 18:04:44
# uname -a
Linux hostname.domain.tld 3.10.0-514.6.1.el7.x86_64 #1 SMP Wed Jan 18 13:06:36 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
# cat /etc/centos-release
CentOS Linux release 7.3.1611 (Core)
Within this configuration I have to use mod_substitute to rewrite URLs from some applications.
For this I am using mod_filter with the SUBSTITUTE Filter as follows:
ProxyRequests Off
ProxyPass /my-location https://my-server.domain.tld/
<Location /my-location/>
ProxyPassReverse /my-location
FilterDeclare AGFILTER
FilterProvider AGFILTER SUBSTITUTE "%{resp:Content-Type} =~ m#^text/html#"
FilterProvider AGFILTER SUBSTITUTE "%{resp:Content-Type} =~ m#.*/css#"
FilterProvider AGFILTER SUBSTITUTE "%{resp:Content-Type} =~ m#.*/json#"
FilterProvider AGFILTER SUBSTITUTE "%{resp:Content-Type} =~ m#.*/javascript#"
FilterChain AGFILTER
Substitute "s#/(css|js|images|management|system|help)/(.*)#/my-location/$1/$2#fi"
</Location>
It works fine if there is only one occurrence of the search pattern in a line in the html code. This occurrence will be replaced properly.
However, if there are two or more occurrences of the search pattern in one html line, only the first one is replaced. It looks like this example:
<tr><th colspan=3 nowrap></th><th colspan=3 nowrap><a href="overview.epl?hide=1"><img border=0 src="/my-location/images/hide.gif" alt=" Spalte ausblenden"></a> <a href="overview.epl?cl=1&pl=1"><img src="/images/right.gif" border=0 alt=" Spalte nach rechts schieben"></a></th><th colspan=3 nowrap><a href="overview.epl?cl=2&pl=-1"><img src="/images/left.gif" alt=" Spalte nach links schieben" border=0 ></a> <a ....
Here you see: The first one is replaced, the second image URL is the same as before.
Is this works-as-designed?
Is there any configuration option to make mod_substitute to replace all occurrences of a pattern or is there anything wrong with the configuration?
I tried several replacement options [fniq] of Substitute, but no change.
The proxied server runs https. Maybe this is the problem?
Any help appreciated. Thanks a lot!
Mit freundlichen Grüßen / Kind regards
Uwe Poliak
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