Get the original input value

[Hostname47]

I'm using purifier to clean some WYSIWYG inputs in my application, and at some point, I wanted to get the original value of inputs before stripping tags to validate it, and I'm wondering if this is possible.
Example :

User enter the following string : This website is really awesome <script>some malicious js code</script>
String after clean : This website is really awesome
I want to get the original string entered by the user in my controller method.

Is that possible to achieve !?