StackOverflow2013

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13394793
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2012-11-15T09:41:40.497
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2012-11-15T09:41:40.497
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I might consider taking a look at the bit torrent files as a start. I think it uses a JSON like style If you have a torrent program you can generate a .torrent file for a folder and the contents and check it out I think this uses a concatenated SHA1 hash of parts of a file but you could just concatenate multiple hashes in it's place, and have then length encoded. Wikipedia has the following example: <a href="http://en.wikipedia.org/wiki/Torrent_file" rel="nofollow">http://en.wikipedia.org/wiki/Torrent_file</a> <pre><code>{ 'announce': 'http://tracker.site1.com/announce', 'info': { 'name': 'directoryName', 'piece length': 262144, 'files': [ {'path': ['111.txt'], 'length': 111}, {'path': ['222.txt'], 'length': 222} ], 'pieces': '6a8af7eda90ba9f851831073c48ea6b7b7e9feeb...8a43d9d965a47f75488d3fb47d2c586337a20b9f' } } </code></pre> I would probably modify it to be something like: <pre><code>{ 'datelastupdated': '[date hash program ran]', 'info': { 'name': 'thedirectoryName', 'Totalfiles': 2, 'Totaldirs': 2, 'files': [ {'name': '111.txt', 'size': 111, 'md5':"df038ad...", 'sha1':'3323...}, {'name': '222.txt', 'size': 222 ........ etc.} ], 'dirs': [ {'name': 'directoryname'}, {'name': 'othername'} ] } } </code></pre> You can then use a package to do json_encoding or decoding (php from cli will work for this) or whatever you want to create/update them.. this structure would allow you to access it conveniently after doing a json_decode something like: <pre><code>$decodedjson->info->files[x]->name </code></pre> I always get a bit confused w/ that syntax, so it might be something like <code>$decodedjson->info['files'][x]->name</code> , but hopefully you get the idea, it would be easy to loop across the structure, update it compare, and save it.. Cheers!
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1. POchecking crc32 of a file
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1. USJeremy Adsitt
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