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POHow to serve different cached versions of a page depending on a cookie in Drupal?
 

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  1. POHow to serve different cached versions of a page depending on a cookie in Drupal?
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    <p>The task is relatively straightforward:</p> <p>A Drupal website displays a list of articles with thumbnails. Some visitors would like to view it without images by clicking on a button/link and have that preference saved.</p> <p>e.g. <a href="http://patterntap.com/collections/index/" rel="nofollow noreferrer">http://patterntap.com/collections/index/</a></p> <p><img src="https://i.stack.imgur.com/1mosX.png" alt="alt text"></p> <p>The problem is all visitors are anonymous and given certain traffic, page cache is enabled.</p> <p>My idea was to use some simple JavaScript to set a cookie, refresh the page and depending on the cookie values (or its presence/absence) display or hide the images.</p> <p>Except Drupal serves cached pages quite early and the only quick way to modify the cached version that I could find is by hacking includes/bootstrap.inc and add a custom class to the body classes then hide the images with css.</p> <p>A very wrong approach, I know. But I wonder if there is a way to save different versions of a page and serve the correct version?</p> <p>Edit:</p> <ul> <li>need to keep the same uri</li> <li>the js to show/hide the images without reload and set the cookie is already in place</li> <li><code>hook_boot()</code> is not really called for cached pages, so can't do it via custom module</li> <li>.htaccess mods?</li> </ul> <p>Edit/solution: In the end went with Rimian's suggestion. But it is possible to accomplish the task using our own cache.inc implementation as seen in the <a href="http://drupal.org/project/mobile_tools" rel="nofollow noreferrer">Mobile Tools</a> module. Specifically, by extending cache.inc and updating settings.php to include</p> <pre><code>$conf['page_cache_fastpath'] = FALSE; $conf['cache_inc'] = 'path/to/my/module/my_module_cache.inc'; </code></pre>
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    1. COI can't think of any way you could possibly solve this in Drupal, short of hacking bootstrap.inc. Have you considered adding this as a suggestion to the Drupal core devs?
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    2. CO*sigh* Did not consider, but may be a good call to suggest it to the core devs. I just realized that this may be possible by combining [jeffreymb](http://stackoverflow.com/users/107768/jeffreymb)'s suggestion to use a GET variable and .htaccess rewrite based on the cookie. Theoretically the GET variable can be transparent. ** rolling sleeves **
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