mirror of
https://github.com/silverstripe/silverstripe-framework
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64 lines
2.5 KiB
Markdown
64 lines
2.5 KiB
Markdown
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# Director
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## Introduction
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Director is the first step in the "execution pipeline". It parses the URL, matching it to one of a number of patterns,
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and determines the controller, action and any argument to be used. It then runs the controller, which will finally run
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the viewer and/or perform processing steps.
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## Best Practices
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* Checking for an Ajax-Request: Use Director::is_ajax() instead of checking for $_REQUEST['ajax'].
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## Redirection
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The Director class has a number of methods to facilitate 301 and 302 HTTP redirection.
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* **Director::redirect("action-name")**: If there's no slash in the URL passed to redirect, then it is assumed that you
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want to go to a different action on the current controller.
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* **Director::redirect("relative/url")**: If there is a slash in the URL, it's taken to be a normal URL. Relative URLs
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will are assumed to be relative to the site-root; so Director::redirect("home/") will work no matter what the current
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URL is.
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* **Director::redirect("http://www.absoluteurl.com")**: Of course, you can pass redirect() absolute URL s too.
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* **Director::redirectPerm("any-url")**: redirectPerm takes the same arguments as redirect, but it will send a 301
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(permanent) instead of a 302 (temporary) header. It improves search rankings, so this should be used whenever the
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following two conditions are true:
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* Nothing happens server-side prior to the redirection
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* The redirection will always occur
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* **Director::redirectBack()**: This will return you to the previous page. There's no permanent version of
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redirectBack().
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## Custom Rewrite Rules
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You can influence the way URLs are resolved one of 2 ways
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1. Adding rules to Director in `<yourproject>/_config.php` (See Default Rewrite Rules below for examples)
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2. Adding rules in your extended Controller class via the *$url_handlers* static variable
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See [controller](/topics/controller) for examples and explanations on how the rules get processed for both 1 and 2 above.
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* Static redirect for specific URL
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:::php
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Director::addRules(100, array(
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'myPermanentRedirect' => 'redirect:http://www.mysite.com'
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));
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## Default Rewrite Rules
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SilverStripe comes with certain rewrite rules (e.g. for *admin/assets*).
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* [sapphire/_config.php](http://open.silverstripe.org/browser/modules/sapphire/trunk/_config.php)
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* [cms/_config.php](http://open.silverstripe.org/browser/modules/cms/trunk/_config.php)
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## Links
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* See ModelAsController class for details on controller/model-coupling
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* See [execution-pipeline](/reference/execution-pipeline) for custom routing
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## API Documentation
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`[api:Director]`
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