Upload via multi-line form OR .CSV, enrich with API data and return to user to click download

Hi all,

Hoping someone has achieved this or can point me in the right direction.

Basically, I want a user to be able to add up to 100 lines to a multi-line form field, or upload a CSV file - we then call an external API to match the data and enrich each line and then return a downloadable .csv file on the same screen for the user to download.

I appreciate any guidance here.


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