Domain input should handle URLs with paths or schemes

[pparage]

Describe the Bug
On the web test page (homepage), entering a domain that includes anything other than a plain domain like example.com—for example, using wildcards or including a scheme like https://—results in an error. It seems the input is not properly sanitized or escaped, and there may be missing logic to handle URLs with schemes or paths.

To Reproduce
Steps to reproduce the behavior:

• Go to testing.nc3.lu

• Enter a domain that includes a path or protocol (e.g., https://example.com)

• Click on Submit

• Observe the error

Expected Behavior
The test should handle domains entered with protocols (like https://) or paths gracefully by either:

• Stripping unnecessary parts (e.g., path or scheme), or

• Properly escaping and interpreting them to ensure the test can still run.

Suggested Fix

• Validate and normalize input by extracting only the relevant domain part.

• Add a frontend warning or automatic correction when incorrect formats are entered.

• Consider supporting full URLs as input if technically viable.