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Compute sha1 checksum of a file. Inspired by http://stackoverflow.com/questions/18586839/read-file-stream-using-javascript-in-web-browser?answertab=votes#tab-top
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| <html> | |
| <!-- You may need to download them from https://github.com/brix/crypto-js/tree/release-3.1.2/build --> | |
| <script src="rollups/sha1.js"></script> | |
| <script src='components/lib-typedarrays-min.js'></script> | |
| <body> | |
| <script> | |
| function sha1sum() { | |
| var oFile = document.getElementById('uploadFile').files[0]; | |
| var sha1 = CryptoJS.algo.SHA1.create(); | |
| var read = 0; | |
| var unit = 1024 * 1024; | |
| var blob; | |
| var reader = new FileReader(); | |
| reader.readAsArrayBuffer(oFile.slice(read, read + unit)); | |
| reader.onload = function(e) { | |
| var bytes = CryptoJS.lib.WordArray.create(e.target.result); | |
| sha1.update(bytes); | |
| read += unit; | |
| if (read < oFile.size) { | |
| blob = oFile.slice(read, read + unit); | |
| reader.readAsArrayBuffer(blob); | |
| } else { | |
| var hash = sha1.finalize(); | |
| console.log(hash.toString(CryptoJS.enc.Hex)); // print the result | |
| } | |
| } | |
| } | |
| </script> | |
| <form name="uploadForm"> | |
| <input id="uploadFile" type="file" onchange="sha1sum();" /> | |
| <input type="submit" value="Send" /> | |
| </form> | |
| </body> | |
| </html> |
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Sorry, in my version I didn't properly load http://crypto-js.googlecode.com/svn/tags/3.1.2/build/components/lib-typedarrays-min.js