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I was just uploading files to drive and I was a little annoyed that my entire upload stopped to ask if I wanted to overwrite a duplicate file. The fact that firefox knows it's a duplicate file makes this a trivial point in programming. Since it knows the file is duplicate it should know what files are already on the server. If the file you are uploading is duplicate it should wait until the end to ask what you want to do with the file and upload the unique files first that way the entire download isn't stalled until you manually click the dialogue box asking if you want to overwrite the file or skip it. Just skip the file until the end of the upload. If you don't click the dialogue box within X seconds it just defaults to only uploading the unique files. I should code this option into a browser object and make it work just as an example. I'm just not really sure where to look for conditional http request. Anybody know of an arcane network programming book that covers topics like this? Better yet is there an implementation of this already somewhere that I can borrow code base from? Anyway what do you guys thing about this idea?