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Committer:
brandon-jiang
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Date:
2016-06-19 08:00:58 UTC
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Revision ID:
brandon.jiang.p@outlook.com-20160619080058-6hdsq55xzihgxco0
Reject duplicate image when download
avoid to download duplicate images which have been downloaded. For exisiting variety user, you may also consider to hash all previous images.