maybe it's weird, but I want to use a simple form to create two inputs, which should be forwarded as variables to a script.
Based on the output of this script I can do in the next step some searches, but first I need to run this script as a data input.
Any help appreciated!
This is not easy to do using the Splunk XML UI framework, short of writing your own custom modules. Possibly the XML and/or the search language and or Splunk macros can do the work for you? Otherwise, I can only suggest building your UI from scratch using any other tool, and getting the data from Splunk via the REST API.
You can use the ServerSideInclude modules to include HTML in Splunk views. Not sure if this will help you that much as you would then have to have your HTML send data back to the Splunk framework, presumably. I don't know of any way for a search command to get the search string that contains it.