Re: convert from mod_jk to proxy_ajp

André Warnier <aw@xxxxxxxxxx> · Thu, 01 Jan 2009 14:57:58 +0100

Eric Covener wrote:

On Thu, Jan 1, 2009 at 7:47 AM, André Warnier <aw@xxxxxxxxxx> wrote:

RewriteCond %{REQUEST_URI} !/servlet\.[^\.]+$
RewriteRule ^/xyz/(.*)$ /$1 [PT]
<LocationMatch "/servlet\.[^.]+$">
 ProxyPass ajp://localhost:8009
</LocationMatch>

File "/srv/www/star1/docs/xyz/" not found.

Are there any other rewrites that actually apply to the servlet and

don't use PT?  

Not in this case, no.

A matching RewriteRule w/o PT will prevent parts of

mod_proxy from running (where it tags a request as being for the
proxy, to be handled later)

My usual suggestion/simplification is to use rewrite with the P flag

whenever rewrite and proxy are required for the same context root. 

As mentioned in my post, I am new to this, and not quite clear yet about 

the interaction between mod_rewrite and mod_proxy. (*)

Another point a bit obscure to me is when using the <LocationMatch> 

section above, if the ProxyPass then really works as expected, taking 

the complete matching URI as argument 1.

Apparently the ProxyPass does not work, because Apache is trying to 

server the URI itself.  But if I try to add an URI first argument to 

ProxyPass, it signals an error in the arguments at startup of Apache.

 I

believe in 2.0.x it was less predictable because the Proxy could
actually run first and prevent rewrite from happening at all.

The Apache version is 2.2.3 here, so it should not be a concern.

If you're handy with a debugger, 

not at all

"proxy_trans" is the name of the

function that can be "covered up".

(*) For example, could I spare the <LocationMatch> and ProxyPass 

entirely, and use a RewriteRule to forward this directy to the ajp port, 

a bit like :

RewriteRule ^/(xyz/.*/servlet\.[^\.]+)$ ajp://localhost:8009/$1 [PT]
?

I am not quite sure that I really want to do this, because the 

<LocationMatch> section is also handy to add other things, so let's say 

this is just curiosity at this point.

Thanks.

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