Web front-end to find/grep/ack

In my lab, we are trying to build a web that allows the user to enter **queries** for find, ack, grep on a specific directory. The web would return an HTML with a table of a list of clickable files (click on them would download the file). For example, in this interface the user would type a word in a form in the browser, and the system would call find . -name "*word*" and send back an HTML with the result. Has anything like this been done before? We would like to avoid reinventing the wheel. What toolkits, utilities or packages would be helpful to build this functionality?