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Subject Re: [users@httpd] httpd 2.2.4 + mod_proxy + tomcat 6.0.9 + ColdFusion
Date Mon, 12 Feb 2007 16:18:56 GMT
Dave Shuck wrote:
> I hate to spam up the list with this issue, but I have another question if you 
> would indulge me.  To strip this down a bit, let's just forget about the 
> multiple instances and say I have a single instance of Tomcat and have 
> installed ColdFusion as an application within it.   
> So far I have been able to forward .cfm files to ColdFusion via mod_jk and 
> ProxyPass, but neither was in the way that I expected.  I haven't been able 
> to successfully process cfm files with the RewriteRule method.  Perhaps the 
> problem is in my expectation rather than functionality.
> Here is what I would expect to happen.  In Tomcat there is a webapp 
> named "ROOT" which is where the ColdFusion web admin tools and such 
> installed.  It's physical path is /usr/local/apache-tomcat/webapps/ROOT I can 
> hit that with http://localhost:8080/......   


> Then in my httpd-vhosts.conf I 
> have a website that is pathed /usr/local/apache2/htdocs/whateversite.  I 
> Ideally I want all my files to exist in the .../htdocs/whateversite directory 
> and when I hit a .cfm file in that directory, I want that file to be 
> processed by the ColdFusion application.    


> When I used ProxyPass, any request to 'whateversite' would just forward the 
> request to the 'ROOT' site and expect the requested file to exist 
> in .../webapps/ROOT.    Obviously this wasn't the answer.

that's because you told it to...

when the request comes in, you forward the request to tomcat, which 
looked for it in the default application (ROOT) because you haven't told 
Tomcat to look anywhere else.

Apache doesn't send the whole file over to Tomcat for processing, it 
just abdicates responsibility for the requested url and expects Tomcat 
to know what to do with it, and where to find it.

> When I used mod_jk, any non-".cfm" templates would serve properly but when it 
> went to serve the ".cfm" templates it would expect those to exist in 
> that "ROOT" directory rather in the "whateversite" directory just as 
> ProxyPass had.  This was closer but still not the answer.

as above you've not configured your Tomcat to know where those files are.

> I haven't yet gotten your suggestion working using RewriteRule, but  would 
> this work as I was expecting where it would not actually re-route the request 
> to look for the template in another directory, but actually process the 
> requested template through the application?

it doesn't process the file like a filter, a proxy instruction hands off 
the request for processing by another server, then feeds the results 
back to the client.

> For what it's worth, I added this to the bottom of my httpd.conf file:
> ReWriteEngine on
> RewriteRule  ^\/(.+)\.cfm(.+)? ajp://localhost:8009/$1.cfm$2 [P,L]
> RewriteRule  ^\/(.+)\.cfc(.+)? ajp://localhost:8009/$1.cfc$2 [P,L]
> And this does exist in my Tomcat server.xml:
>     <!-- Define an AJP 1.3 Connector on port 8009 -->
>     <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />
> When I put request a ColdFusion template it just serves the plain text back 
> from the template sitting in the "whatever" site.  I am not seeing any 
> errors, but it just seems to do nothing with that ".cfm" request.
> Again, I feel like I am just missing something that is probably painfully 
> obvious to others, but after reading and re-reading through the docs I am 
> just not finding the exact answer I am looking for.

Your Tomcat configuration isn't quite right yet.

You need to specify, either a docbase in the ROOT context with all your 
cf? files in it, or add another context and direct all requests to that.

ask about configuring Tomcat webapps on the tomcat-user list & I'll look 
out for you there.

> Thanks again for your advice, and if you have any further advice I would 
> greatly appreciate it.
> ~Dave
> On Monday 12 February 2007 04:29:33 Pid wrote:
>> Dave Shuck wrote:
>>> Pid, I appreciate your response.  I would like to understand this a
>>> little better as it is currently just slightly more clear than voodoo
>>> magic to me. Is the specification of the port what points it to a
>>> specific instance on Tomcat?  If so, I am assuming that I have to create
>>> some type of matching piece on the Tomcat side.  Is this correct?
>>> Thanks again!
>>> On Sunday 11 February 2007 12:18:48 Pid wrote:
>>>> ReWriteEngine on
>>>> RewriteRule  ^\/(.+)\.cfm(.+)? ajp://localhost:8009/$1.cfm$2 [P,L]
>>>> RewriteRule  ^\/(.+)\.cfc(.+)? ajp://localhost:8009/$1.cfc$2 [P,L]
>> Hi
>> (Yes, sorry - dashed a quick reply off as I was heading out.)
>> mod_rewrite lets you send to a configured proxy.
>> The rule is designed to capture URLs by file type; the bit before .cfm
>> gets the main bit of the path, the bit afterwards captures query string
>> and session id data.
>> ajp:// indicates the protocol (you could also use http:// with the
>> mod_proxy_http, but ajp is binary and superior in most cases)
>> (If you have a cluster - more than one tomcat - let me know)
>> localhost:8009 - server and port follow, which is a configured tomcat
>> instance, to which you pass the path back references.
>> [P,L] are the mod_rewrite 'proxy' and 'last' rule instructions,
>> respectively.
>> You can find detailed information about mod_rewrite in the Apache docs.
>>   It is worth trying to get your head around the mod_proxy doc.  The
>> mod_proxy_ajp documentation is somewhat obscure, as it isn't
>> particularly clear that you don't need to do anything to configure it.
>> The main mod_proxy module accepts all the configuration instructions,
>> the sub modules only provide protocol connectivity.
>> (ie you need mod_proxy_HTTP to: RRule /path HTTP://server:port/path )
>> The other way to forward requests is, as you mentioned, ProxyPass.
>> This is useful if you wish to send most requests to a server, but you
>> *can* specify which paths not to.
>> E.g.
>> ProxyPass /css 		!  # a wayne's world style suffix 'not'
>> ProxyPass /javascript 	!  # one per path definition
>> ProxyPass /		ajp://server/port/ option=value option=value
>> On to Tomcat: only the ajp connector needs to be active; you can disable
>> the http one if you're not going to use it.  you only need to look at
>> the ajp connector port number, it should work out of the box.
>> if you need help with tomcat configuration, join the tomcat-users list
>> and ask (me?) for help there.
>> p
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