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How does the website determine whether the data is duplicate when uploading it?
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- 2016-07-25 08:59:321022browse
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①For example, on a library website, how to prevent users from repeatedly uploading the same documents? Should MD5 be used for comparison? Is there any other way? ② If you only change the name of the document without changing the content, will the MD5 be the same before and after the change? |
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