chao
/
mini_cocopi


			
				
					
						
						
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							<!DOCTYPE html>
<html>
<!--
Copyright 2011 The Closure Library Authors. All Rights Reserved.

Use of this source code is governed by the Apache License, Version 2.0.
See the COPYING file for details.

-->
<head>
<title>goog.crypt.BlobHasher</title>
<script src="../base.js"></script>
<script>
  goog.require('goog.crypt');
  goog.require('goog.crypt.BlobHasher');
  goog.require('goog.crypt.Md5');
</script>
<link rel="stylesheet" href="css/demo.css">
</head>
<body>
<h1>goog.crypt.BlobHasher</h1>
<table>
<tr><td>File:</td><td>
  <input type="file" onchange="computeMD5(this.files[0]);">
  <input type="button" value="Abort" onclick="abort();">
</td></tr>
<tr><td>MD5:</td><td><div id="output" style="font-family:courier new,fixed" /></td></tr>
</table>
<script>

var hashFn = new goog.crypt.Md5();
var blobHasher = new goog.crypt.BlobHasher(hashFn);
var startTime = 0;

function computeMD5(file) {
  goog.events.listen(blobHasher, goog.crypt.BlobHasher.EventType.COMPLETE,
                     function() {
    var hash = goog.crypt.byteArrayToHex(blobHasher.getHash());
    var time = goog.now() - startTime;
    display(hash + ' (' + time/1000 + 's)');
  });
  goog.events.listen(blobHasher, goog.crypt.BlobHasher.EventType.ABORT,
                     function() {
    display('Aborted');
  });
  display('Computing...');
  startTime = goog.now();
  blobHasher.hash(file);
}

function abort() {
  blobHasher.abort();
}

function display(message) {
  document.getElementById('output').innerHTML = message;
}

</script>
</body>
</html>