Comments on: Rails + Caching + XML = Bad Mime Types

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By: Tom

Tom — Wed, 29 Nov 2006 03:54:15 +0000

I also ran into the "Location not allowed here" problem. I think this is due to certain limitation of the Apache setup of your host. For some reason, FilesMatch does work:

<FilesMatch "\.xml$">
    ForceType application/xml
</FilesMatch>

It allows me to cache files with .xml extension...

Tom

By: Mike Zornek

Mike Zornek — Sun, 19 Feb 2006 12:11:07 +0000

Adam, I think I like the ForceType solution the best since not all actions in the controller should get the xml file extensions. I tried it however and ran into a problem. When I added the ForceType to my .htaccess file I got an error: Location not allowed here. Looking at my VirtualHost I am applying All to AllowOverride so it should work, but it’s not. Any ideas?

 
ServerName http://www.clickablebliss.com
ServerAlias clickablebliss.com
ServerAdmin mike@clickablebliss.com
DocumentRoot /webserver/cbwebsite/current/public/
ErrorLog /webserver/cbwebsite/logs/error_log
CustomLog /webserver/cbwebsite/logs/access_log combined
 
    Options ExecCGI FollowSymLinks 
    AllowOverride All 
    Allow from all 
    Order allow,deny

By: Jacob Stetser

Jacob Stetser — Sat, 18 Feb 2006 03:39:04 +0000

I believe I just had this working, but through a roundabout fashion. In routes.rb, I had

map.connect '/album/:id/images.xml', :controller => 'album', :action => 'images'

And when I used caches_page :images in my album controller, it created public/album/#/images.xml. I don't know if the same will work for you, but perhaps this will get you started down that road?

By: Adam C. Greenfield

Adam C. Greenfield — Sat, 18 Feb 2006 00:57:14 +0000

Oops s|text/xml|application/xml|

By: Adam C. Greenfield

Adam C. Greenfield — Sat, 18 Feb 2006 00:45:58 +0000

Well, looking at the current Rails caching system it appears it only supports a single prefix, however it allows you to set the extension using a class attribute ActionController::Caching::Pages.page_cache_extension = '.xml'

You might consider this hack to work this out in your case. You can simply use the Apache directive ForceType to set your content type by adding the following to your Apache VirtualHost:

<Location /blog/fastrss.html>
ForceType text/xml
</Location>

If you don't want to do that you could crack open ActionController::Caching::Pages and try to scratch your itch that way, but it looks like the code was pretty much only designed to cache one type of file. Changing it to allow for multiple file types (which you could pass as a argument for example) would not be a huge undertaking. It is also worth noting the if you want caching to work for multiple file extensions you end up adding overhead to every request because it will require one RewriteRule per file extension in your .htaccess file (which will be processed, and check the disk on each request)