Ideas for resumable data transfer

Which of the following is a good expert on resumable Upload? how can I determine whether a file is a resumable Upload? it seems unreliable to determine whether the file name exists. What if the file name uploaded by the client is the same but the file name is different ??? Is there a better way ?? & Nbsp; can I write down the if statement? & nbsp; I am very happy & nbsp; thank you for resumable data transfer.
Which kind of good experts can help tell you how to determine whether a file is a resumable file and whether the file name exists seems unreliable. What if the file name uploaded by the client is the same but the file name is different ??? Is there a better way ?? Can you write down the if statement? thank you for sharing it: More