# How to cache this kind of action? **URL:** \ **Category:** Rails\ **Created:** [February 12, 2007, 11:02am UTC](https://www.ruby-forum.com/t/how-to-cache-this-kind-of-action/85284 "2007-02-12T11:02:39Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Tiger\_Dong](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/50afbb/32.png) [@Tiger\_Dong](https://www.ruby-forum.com/u/Tiger_Dong)\ **Post date:** [February 12, 2007, 11:02am UTC](https://www.ruby-forum.com/t/how-to-cache-this-kind-of-action/85284/1 "2007-02-12T11:02:39Z")
I have an action. It renders files specified by URL. If the file is a source code, the action will do something on it, like highlighting. If the file is a plaintext or an image, the action just sends it as is. This code works until I turn on cache on this action. With cache enabled, the second time to access a URL will result in a prompt dialog asking if you want to download it. I guess it is related to the mimetype. But don’t know how to solve it:( ---
**Author:** ![Tiger\_Dong](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/50afbb/32.png) [@Tiger\_Dong](https://www.ruby-forum.com/u/Tiger_Dong)\ **Post date:** [February 13, 2007, 8:42am UTC](https://www.ruby-forum.com/t/how-to-cache-this-kind-of-action/85284/2 "2007-02-13T08:42:23Z")
The Rails action\_cache does not keep the headers returned from the first request that causes the data to be cached. On subsequent requests, if you set the correct response.headers for the file _after_ the action cache before filter, then you will get the default headers (text/html content type) My action\_cache filter will keep the headers returned, and will return the same ones on subsequent requests. Just install the plugin and restart your app – for this fix, no other configuration is needed. ---
**Author:** ![Tiger\_Dong](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/50afbb/32.png) [@Tiger\_Dong](https://www.ruby-forum.com/u/Tiger_Dong)\ **Post date:** [February 15, 2007, 7:30am UTC](https://www.ruby-forum.com/t/how-to-cache-this-kind-of-action/85284/3 "2007-02-15T07:30:27Z")
So where can I get your plugin? Thanks in advance. ---
**Author:** ![Tiger\_Dong](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/50afbb/32.png) [@Tiger\_Dong](https://www.ruby-forum.com/u/Tiger_Dong)\ **Post date:** [February 15, 2007, 7:35am UTC](https://www.ruby-forum.com/t/how-to-cache-this-kind-of-action/85284/4 "2007-02-15T07:35:27Z")
I found it. [http://www.agilewebdevelopment.com/plugins/action\_cache](http://www.agilewebdevelopment.com/plugins/action_cache) ---
**Author:** ![Tiger\_Dong](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/50afbb/32.png) [@Tiger\_Dong](https://www.ruby-forum.com/u/Tiger_Dong)\ **Post date:** [February 15, 2007, 8:38am UTC](https://www.ruby-forum.com/t/how-to-cache-this-kind-of-action/85284/5 "2007-02-15T08:38:32Z")
Ben’s agile development site is always the best place to find plugins. ---
**Author:** ![Tiger\_Dong](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/50afbb/32.png) [@Tiger\_Dong](https://www.ruby-forum.com/u/Tiger_Dong)\ **Post date:** [February 15, 2007, 8:38pm UTC](https://www.ruby-forum.com/t/how-to-cache-this-kind-of-action/85284/6 "2007-02-15T20:38:02Z")
Are you setting the correct mime type in your action that returns the file? Can you post the code for that action? ---
**Author:** ![Tiger\_Dong](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/50afbb/32.png) [@Tiger\_Dong](https://www.ruby-forum.com/u/Tiger_Dong)\ **Post date:** [February 16, 2007, 2:49am UTC](https://www.ruby-forum.com/t/how-to-cache-this-kind-of-action/85284/7 "2007-02-16T02:49:40Z")
Now I am using caches\_action instead of caches\_page and it works. Is this a “Work as design”? BTW: I think your plugin is useful. Can you make it default in rails? I am not clear about rails development model. Just wondering. Anyway, thanks a lot. ---
**Author:** ![Tiger\_Dong](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/50afbb/32.png) [@Tiger\_Dong](https://www.ruby-forum.com/u/Tiger_Dong)\ **Post date:** [February 15, 2007, 3:40pm UTC](https://www.ruby-forum.com/t/how-to-cache-this-kind-of-action/85284/8 "2007-02-15T15:40:15Z")
Opps, I’ve installed your plugin but still have the problem. It’s my first time to use rails plugin. I am not sure if I’ve done things right. I installed the plugin by “./script/plugin install [http://craz8.com/](http://craz8.com/) svn/trunk/plugins/action\_cache”. But how can I know this plugin is working?