Serving the Mule Tools XSD using the Apache Rewrite Module and PHP

After I created the NamespaceHandler and XSD for the Integration Cocktail Mule Tools module, I wanted to make the XSD available at the URL http://www.integrationcocktail.org/schema/mule/tools/3.2/mule-tools.xsd so that users of the module will have code completion using any half decent XML editor. I bought the domain and was going to use a simple LAMP server to provide the XSD. It was straightforward enough if I wanted to simply put the XSD file, however I know myself, I will forget to update the XSD file after I will do any form of updates to the file. So why not provide the schema directly from the git repository? So, after years not touching any form of PHP I was going to hack a bit with it.

First I added a .htaccess file to rewrite all requests for .xsd files which do not exist to my php script:

	RewriteEngine on
	RewriteCond %{REQUEST_FILENAME} !-d
	RewriteCond %{REQUEST_FILENAME} !-f
	RewriteCond %{THE_REQUEST} .*\.xsd
	RewriteRule ^(.*)$ myproxy.php?url=$1

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After that all I had to do is create a simple script to proxy. I used PHP cURL library to do the requests and voila, simple enough:

	<?php
	$requestUrl = $_GET['url'];
	switch($requestUrl){
	case "schema/mule/tools/3.2/mule-tools.xsd":{
	$targetUrl = "https://raw.github.com/stephenfenech/integrationcocktail-blog/master/mule/mule-tools/src/main/resources/META-INF/mule-tools.xsd";
	break;
	}
	default : $targetUrl = "https://raw.github.com/stephenfenech/integrationcocktail-blog/master/mule/mule-tools/src/main/resources/META-INF/mule-tools.xsd";
	}
	$ch= curl_init($targetUrl);
	curl_setopt($ch, CURLOPT_HEADER, false);
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
	$xsd = curl_exec($ch);
	header("Content-Type: text/xml");
	echo $xsd;
	curl_close($ch);
	?>

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Anybody out there who is creating custom mule modules and as they should, to encourage use, creates a custom namespace, please, do make the XSD available for your fellow developers so that you do not have to stay adding it to the IDE.