How to download files from Dropbox with integrity checking?

Question

In my application I download video files(.mp4 and .avi) from dropbox folder to folder in sdcard. I need to play file with videoview. How I can check files integrity (equality of files from sdcard and DropBox).

upvoting as Dropbox needs to include MD5/SHA1 on their side! — Joel, Mar 15 '16 at 15:29

score 0 · Answer 1 · edited May 23 '17 at 11:54

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I recommend comparing file checksums. Here is a basic example how to get the MD5 checksum. More detailed examples with other functions can be found here.

edited May 23 '17 at 11:54

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answered Jul 15 '14 at 08:28

slezadav

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And how can I get md5 file checksums from Dropbox? – Artem Cherkasov Jul 15 '14 at 08:32
The Dropbox API currently doesn't offer a way to request the hash of a file. – Greg Jul 15 '14 at 16:58
Unfortunately, Greg is right. You can still check the size of the file though. It is not nearly as good as a hash, but it seems it is the only choice. – slezadav Jul 16 '14 at 11:16

score 0 · Answer 2 · answered Mar 21 '17 at 18:25

The Dropbox API now offers a hash of file data that you can use to verify a file's contents. You can find it in FileMetadata.content_hash. It isn't a single MD5 or SHA1, but rather a combination of SHA256 hashes of the pieces of the file. You can find more information here:

https://www.dropbox.com/developers/reference/content-hash

How to download files from Dropbox with integrity checking?

2 Answers2