#7132 – Help to code dynamic SEF redirection

Hi

As this only a redirect, there's no reason to tie this to sh404SEF. You should add a separate system plugin which runs your code on the onAfterRoute Joomla event and do the redirect at this stage.

my question is which file in sh404SEF and in which line number in the file would this code need to go

sh404SEF is a large extension with several hundreds files and ens of thousands of lines, it's not really as simple as "which file and line number" any more :)

However we do have a facility to allow code customization, it works like this:

- create or open a file called /libraries/weeblr/sh404sef_functions.php
- since last version, we include a sample file there so that file is already filled with sample customizations, all commented out
- locate the line that includes "sh404sef_before_parse_rule", around line 300 (note that there are 2 such lines, look for the second one
The code in the sample file looks like this:

//ShlHook::add(
//	'sh404sef_before_parse_rule',
//	function ($uri, $jRouter) {
//
//		$path = $uri->getPath();
//
//		$doNotAutoRedirectFolders    = array(
//			'images/Documents/'
//		);
//		$doNotAutoRedirectExtensions = array(
//			'.pdf',
//			'.mp4',
//			'.txt'
//		);
//
//		if (
//			wbStartsWith(
//				$path,
//				$doNotAutoRedirectFolders
//			)
//			&&
//			wbEndsWith(
//				$path,
//				$doNotAutoRedirectExtensions
//			)
//		)
//		{
//			throw new \Exception('Not found', 404);
//		}
//
//		//$doNotAutoRedirectList = array(
//		//	'images/Documents/test.pdf',
//		//	'images/Documents/another.pdf'
//		//);
//		//
//		//if (
//		//	wbEndsWith($path, $doNotAutoRedirectList)
//		//)
//		//{
//		//	throw new \Exception('Not found', 404);
//		//}
//
//		return $uri;
//	}
//);

Now you need to remove all the comments and you get:

ShlHook::add(
	'sh404sef_before_parse_rule',
	function ($uri, $jRouter) {

		$path = $uri->getPath();

		$doNotAutoRedirectFolders    = array(
			'images/Documents/'
		);
		$doNotAutoRedirectExtensions = array(
			'.pdf',
			'.mp4',
			'.txt'
		);

		if (
			wbStartsWith(
				$path,
				$doNotAutoRedirectFolders
			)
			&&
			wbEndsWith(
				$path,
				$doNotAutoRedirectExtensions
			)
		)
		{
			throw new \Exception('Not found', 404);
		}

		//$doNotAutoRedirectList = array(
		//	'images/Documents/test.pdf',
		//	'images/Documents/another.pdf'
		//);
		//
		//if (
		//	wbEndsWith($path, $doNotAutoRedirectList)
		//)
		//{
		//	throw new \Exception('Not found', 404);
		//}

		return $uri;
	}
);

I think you should only keep the start and remove all the rest:

$path = $uri->getPath();

will give you the path of the current request, ie

forum/parenting-advice/513999-Re-How-do-I-choose-a-school.html

Then it's up to modiyf that code to your needs. You can use the helper functions wbStartWith() if you need them. But then you should identify the URLs you want to redirect, compute the target and redirect with:

JFactory::getApplication()->redirect($targetRedirectUrl);

Best regards

Yannick Gaultier
weeblr.com
@weeblr