title: Download directly from firebase function temp folder
body: <p>I'm wondering if it is possible and safe to download a file directly from firebase functions temp folder? I have a firebase function that generates a pdf file in the temp folder when triggered from the app (e.g. via <code>httpsCallable</code>). Is it possible for the app user to directly download the generated pdf file from the temp folder or does the function needs to do the extra step of saving the file in firebase storage before download? I have not seen examples of the former. In my case there is no need to save the pdf file once it has been downloaded so I see no point in uploading it to storage if it is possible to download it straight from temp folder.</p>