You can guess, but browsers are quite picky about this header --- guess any amount too low and the download is truncated. Guess too high, and the browser will wait for an amount of time just to be sure the server isn't…
You can guess, but browsers are quite picky about this header --- guess any amount too low and the download is truncated. Guess too high, and the browser will wait for an amount of time just to be sure the server isn't…