文件API，网络工作者和Chrome / Chromium

Question

The following minimal HTML file results in an error in the browser's console. 以下最小HTML文件导致浏览器控制台出错。 File is undefined when accessed from a web worker in Chrome. 从Chrome中的Web工作人员访问时， File未定义。

I am somewhat puzzled by this: it is working perfectly well with Firefox and I'd expect Chrome to have this already ironed out, at in a development version (the problem seems present in Chrome 22, 23, and 24). 我对此感到有些困惑：它与Firefox完美配合，我希望Chrome能够在开发版本中解决这个问题（Chrome 22,23和24中出现问题）。

Am I missing something, or is there a workaround to get it to work with Chrome (or may be even other browsers) ? 我是否遗漏了某些内容，或者是否有解决方法可以将其与Chrome（或者甚至是其他浏览器）配合使用？

<html>
<body>
<script type="text/javascript">
// File seems to be defined
var slice = File.prototype.webkitSlice;

window.URL = window.URL || window.webkitURL;
// File is not defined when creating the worker below
var blob = new Blob(["var slice = File.prototype.webkitSlice;"]);
var blobURL = window.URL.createObjectURL(blob);

// Getting:
// Uncaught TypeError: Cannot read property 'prototype' of undefined 
var worker = new Worker(blobURL);
</script>
</body>
</html>

Answer 1

If you change File to Blob , your script works. 如果将File更改为Blob ，则脚本可以正常工作。 File inherits from Blob . File继承自Blob 。

var blob = new Blob(["var slice = Blob.prototype.webkitSlice;"]);

For anyone following: crbug.com/147503 对于以下任何人： crbug.com/147503

Answer 2

WebkitSlice is deprecated in chrome latest version so use slice instead of it. WebkitSlice在chrome最新版本中已弃用，因此请使用slice而不是它。 and use it 并使用它

as ebidel stated 正如ebidel所说

var blob = new Blob(["var slice = Blob.prototype.slice;"]);

文件API，网络工作者和Chrome / Chromium

问题描述

2 个解决方案

解决方案1
2 已采纳 2012-12-04 06:13:02

解决方案2
0 2013-01-23 07:50:22

文件API，网络工作者和Chrome / Chromium

问题描述

2 个解决方案

解决方案1 2 已采纳 2012-12-04 06:13:02

解决方案2 0 2013-01-23 07:50:22

解决方案1
2 已采纳 2012-12-04 06:13:02

解决方案2
0 2013-01-23 07:50:22