'Implementation of file size check logic using aws s3 headObject question

I wanted to implement a logic that checks the size of a file while implementing aws s3 file upload. So I looked it up and it seemed that I had to use ContentLength among the headObjects. How can I use these to check the size of the file on the server side when uploading a file? The technology stack is being done in springboot using java. So Hard TT

I was looking at the documents in aws s3 and was trying to make a reference, but I couldn't understand the logic to check this file size, so I wrote an article to ask for help.



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