I'm using HTMLPurifier to make sure there is no malicious user input.
I'm having a hard time with base64 images. The regular one is already solved.
$config->set('URI.AllowedSchemes', ['data' => true]);
But how about the following?
<img src="data:image/svg+xml;base64,PHN2Zy...4MTEpIi8+PC9zdmc+Cg==" />
For everyone looking for a solution.. there is no built in way to allow base64 svg images. But there is a way to solve it.
I could not find an official documentation, but you can write custom validations.
<?php
namespace App\Services\HTMLPurifier;
use HTMLPurifier_AttrDef_URI;
/**
* Class ParameterURIDef
* @author Artem Schander
*/
class ParameterURIDef extends HTMLPurifier_AttrDef_URI
{
public function validate($uri, $config, $context)
{
if (preg_match('/^data:image\/svg\+xml;base64,([^\"]*)$/', $uri)) {
return true;
}
return parent::validate($uri, $config, $context);
}
}
$config = HTMLPurifier_Config::createDefault();
$config->set('URI.AllowedSchemes', ['data' => true]);
$definition = $config->getHTMLDefinition(true);
$definition->addAttribute('img', 'src', new \App\Services\HTMLPurifier\ParameterURIDef());
$HTMLPurifier = new HTMLPurifier($config);