How to get downloadable link for attachment? - Stack Overflow
: If the remote server supports Range headers, you can download the file in multiple smaller chunks and concatenate them. 2. Downloading Files in Oracle APEX apex download file from url
If you need to fetch a file from an external URL and then push it to the user's browser, you use the APEX_WEB_SERVICE and APEX_HTTP packages. How to get downloadable link for attachment
Salesforce imposes strict limits on HTTP response sizes (typically 6 MB for synchronous callouts and 12 MB for asynchronous). For files exceeding these limits, you must use: apex download file from url
: Use @future methods or Queueable Apex to gain higher limits.