Dynamic pulling mechanism from HTTP web service in SAP CPI

Thank you ahead of time!

Team, I need to get data from an HTTP web service using the GET technique.

Condition 1: The iFlow should only process the data once, and then it should not process the same input again. Condition 2: When new data is added to the HTTP webservice, CPI should process it as soon as possible.

When I use the scheduler,

For example, we keep it every Friday at 10 a.m. PST. In rare cases, the webservice team posts the updated file on Thursday owing to a Friday holiday. Here, CPI must process the new data in the same day, which is Thursday.

Please share your thoughts with me in order to achieve this dynamic pulling mechanism.