检测从用户代理或JavaScript 64位或32位Windows？ [英] Detect 64-bit or 32-bit Windows from User Agent or Javascript?

问题描述

我要提供正确的版本下载。我的版本是：

I want to offer the right version of a download. The versions I have are:

• 在32位Windows
• 在64位Windows
• 的Linux

使用检测的Linux用户代理领域是容易的;但它能够可靠地计算出，如果Windows是32位还是64位？

Detecting Linux using the User Agent field is easy; but is it possible to reliably figure out if Windows is 32-bit or 64-bit?

用户可能会使用奇怪的浏览器 - IE和Firefox是常见的，我们可能有一个歌剧用户某处;也许Chrome浏览器的用户了。我知道，64位Windows 7附带了32位和64位版本的IE浏览器，我想送他们两个64位的版本我下载。

Users might be using weird browsers - IE and Firefox are common, and we probably have an Opera user somewhere; maybe a Chrome user too. I know that 64-bit Windows 7 ships with 32-bit and 64-bit versions of IE, and I'd like to send them both the 64-bit version of my download.

（编辑补充：我知道，我应该提供所有的选项，我会，但人不。 T上读。所以我想提供正确的下载默认情况下，以提高可用性的选项。当然，虽然这是有益的，如果我得到它的权利，这是非常无益的，如果我做错了，而且从答案到目前为止，它看起来并不像有这样做）的一个可靠的方法。

(Edited to add: I know that I should provide all the options, and I will. But people don't read the options. So I wanted to provide the right download by default, to improve usability. Of course, while this is helpful if I get it right, it's extremely unhelpful if I get it wrong. And from the answers so far, it doesn't look like there's a reliable way of doing this).

推荐答案

试试这个，在用户代理字符串查找WOW64（32位64位）或Win64中（原生64位）。

Try this, looks for WOW64 (32-bit on 64-bit) or Win64 (native 64-bit) in the user-agent string.

if (navigator.userAgent.indexOf("WOW64") != -1 || 
    navigator.userAgent.indexOf("Win64") != -1 ){
   alert("This is a 64 bit OS");
} else {
   alert("Not a 64 bit OS");
}

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