StackOverflow2013

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plurals

PO
primarykey
Id
768287
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
3
CommunityOwnedDate
CreationDate
2009-04-20T13:36:36.917
FavoriteCount
0
LastActivityDate
2013-01-09T21:22:51.243
LastEditDate
2013-01-09T21:22:51.243
LastEditorUserId
6521
OwnerUserId
6521
ParentId
768268
PostTypeId
2
Score
83
ViewCount
0
LastEditorDisplayName
text
Body
While there are <a href="http://pajhome.org.uk/crypt/md5/" rel="noreferrer">JS implementations</a> of the MD5 algorithm, older browsers are generally unable to read files from the local filesystem. I wrote that in 2009. So what about new browsers? With a browser that supports the <a href="http://www.w3.org/TR/FileAPI/" rel="noreferrer">FileAPI</a>, you *can * read the contents of a file - the user has to have selected it, either with an <code><input></code> element or drag-and-drop. As of Jan 2013, here's how the major browsers stack up: <ul> <li>FF 3.6 supports <a href="https://developer.mozilla.org/en/DOM/FileReader" rel="noreferrer">FileReader</a>, FF4 supports even more file based functionality</li> <li>Chrome has supported the FileAPI since <a href="http://googlechromereleases.blogspot.com/2010/10/stable-channel-update.html" rel="noreferrer">version 7.0.517.41</a></li> <li>Internet Explorer 10 has partial <a href="http://msdn.microsoft.com/en-us/ie/hh272905#_HTML5FileAPI" rel="noreferrer">FileAPI support</a></li> <li>Opera 11.10 has <a href="http://dev.opera.com/articles/view/the-w3c-file-api/" rel="noreferrer">partial support for FileAPI</a></li> <li>Safari - I couldn't find a good official source for this, but <a href="http://caniuse.com/fileapi" rel="noreferrer">this site suggests partial support from 5.1, full support for 6.0</a>. Another article reports <a href="http://www.thebuzzmedia.com/html5-drag-and-drop-and-file-api-tutorial/" rel="noreferrer">some inconsistencies with the older Safari versions</a> </li> </ul>
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1. POHow to calculate md5 hash of a file using javascript
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1. PTAnswer
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1. USPaul Dixon
UserOwnerUserId
1. USPaul Dixon
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1. POHow to calculate md5 hash of a file using javascript
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1. COApart from the impossibility to get file system access in JS, I would not put any trust at all in a client-generated checksum. So generating the checksum on the server is mandatory in any case.
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 USTomalak

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