Rewrites links to static files so they point your own CDN network. For Wordpress.
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=== Plugin Name === Contributors: wmark Tags: CDN,links,cloudfront,simplecdn,media,performance,distribution,accelerator,content,speed,cloud Requires at least: 2.7 Tested up to: 3.1.2 Stable tag: 1.1.1 Rewrites links to static files to your own CDN network. == Description == Replaces the blog URL by another for all files under `wp-content` and `wp-includes`. That way static content can be handled by a CDN by origin pull. (The origin is your blog address.) You could upload your static files to S3, CloudFront or just any site, too. For S3/Cloudfront, see [this script](http://mark.ossdl.de/2009/09/how-to-copy-your-wordpress-files-to-cloudfront-efficiently/ "how to copy your Wordpress files to CloudFront efficiently") to help you with uploading/synchronizing your blog files. == Installation == 1. Setup your CDN: Either configure an origin pull, mirror bucket or upload your static files somewhere. 2. Upload `ossdl-cdn.php` to the `/wp-content/plugins/` directory. 3. Activate the plugin through the 'Plugins' menu in WordPress. 4. Provide the URL where your static files can be found under Settings. == Frequently Asked Questions == = How to uninstall? = Either deactivate the plugin or delete the `ossdl-cdn.php` file. = Why another such plugin? = As many WP plugins don't correctly include JS and CSS files most of the current CDN plugins cannot rewrite links correctly. They rely on the high-level WP API. This plugin does its rewriting on the lowest level possible - PHP itself. = How does it work? = After your blog pages have been rendered but before sending them to the visitor, it will rewrite links pointing to `wp-content` and `wp-includes`. That rewriting will simply replace your blog URL with that you have entered in settings screen. Thus files are pulled from the other site. = Is it compatible to plugin XY? = Yes, by design it is compatible to all plugins. It hooks into a PHP function ([ob_start](http://us2.php.net/manual/en/function.ob-start.php "function documentation")) and there does the string replacement. Therefore, no Wordpress function is altered, overwritten or modified in any way. Indeed, you could even copy this plugin's rewriter into any arbitrary PHP software. = Where can I see it in action? = On my own blog, [Mark's blog](http://mark.ossdl.de/ "Mark's blog"). See the source code of any page. = Will it work with my CDN? = Yes, if it supports origin pull (aka mirror bucket, some sort of caching). Or if you upload your files manually. = What about Amazon's S3? = Right, S3 doesn't support origin pull. You will have to upload your files by hand. I've written a script for this, too, so it is just a matter of running it. It is linked on the bottom of my blog post about [copying files to CloudFront](http://mark.ossdl.de/2009/09/how-to-copy-your-wordpress-files-to-cloudfront-efficiently/ "how to copy your Wordpress files to CloudFront efficiently"). = What other plugins do you recommend? = Now that you can offload all the files such as images, music or CSS, you should serve your blog posts as static files to decrease load on your server. I recommend [SuperCache-Plus](http://murmatrons.armadillo.homeip.net/features/experimental-eaccelerator-wp-super-cache "Wordpress SuperCache-Plus") as it will maintain, update and create that static files from dynamic content for you. The off-linker is compatible. = I discovered a bug! = Share it with me! The rarer a species, the more interesting. But I will need its habitat, too. Therefore, please send me at least one page with the plugin turned off and on, as attachment. == Changelog == = 1.1.2 - on Github = * Optionally rewrite "root-relative" links. (As suggested by Tony Stuck. Thanks!) The plugin has been * renamed to "CDN Linker" and * moved to [Github](https://github.com/wmark/CDN-Linker). = 1.1.1 = * version bump due to Wordpress' plugin page having released the plugin prematurely = 1.1.0 = * an input field has been added for defining matches that shall be excluded from rewriting * added the feature to include additional (to `wp-content` and `wp-includes`) directories for rewriting * fixed: bug which messed with urls located at the root level of the site, introduced in 1.0.2 (thanks to Vic Holtreman for reporting) = 1.0.2 = * rewriting of URLs from embedded `style=xy:url(...)` CSS attributes * fixed: wrongful rewrite of links into the blogs root directory (thanks to Greg Winn for reporting) = 1.0.1 = * support for off-loading files in root directory, such as `favicon.ico` or `apple-touch-icon.png` = 1.0 = * initial version, as published on my blog