accurate method to compare the s3 object and local object
问题 I saved the modified time in ms and file size into the object's metadata in s3. I realized even if I did not change anything for my file if I open it then just save the file without editing. The modified time will be changed and in this case it will update the s3 object. I thought of using size but size wouldn't be as accurate too because there are chances for the size to be the same even after modified. I also used the Binary got back from s3.getObject and locally's file Binary but without