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I am polling file system for new file, which is upload by someone from web interface.
Now I have to process every new file, but before that I want to insure that the file I am processing is complete (I mean to say it is completely transferred through web interface).
How do I verify if file is complete downloaded or not before processing?
Renaming a filename is an atomic action in most (if not all) filesystems. You can make use of this by uploading the file to a recognizable temporary name and renaming it as soon as the upload is complete.
This way you will “see” only those files that have been uploaded completely and are safe for processing.