解码 IE9 用户代理
我在 Windows 7 虚拟机中安装了 IE9，并惊讶地看到了这个用户代理：
Mozilla/5.0 (兼容; MSIE 9.0; Windows NT 6.1; Trident/5.0; BOIE9;ENUSMSNIP)
特别是，最后两个键 BOIE9 和 ENUSMSNIP 看起来非常垃圾。我习惯于看到工具栏和加载项像这样在用户代理的末尾注册自己，但这是在 Windows 7 的原始安装上，没有其他软件。
它们在注册表中定义：
HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\User Agent\PostPlatform
该键的值为 IEAK，这显然是 Internet Explorer 管理员工具包，其中 根据 Microsoft 发送自定义用户代理字符串。
但为什么？
我猜测 BOIE9 代表“Bing on IE9”。这是唯一活跃的附加组件：
至于 ENUSMSNIP，我不知所措。我的猜测是：
- ENUS = Locale，对我来说是 EN-US（“美国英语”）
- MS = Microsoft
- NIP = ???
我尝试将区域设置更改为 EN-GB，但用户代理没有更新，注册表也没有更新。所以看来只有在安装时才重要（如果我对 ENUS 的看法是正确的话）。
有谁知道这两个用户代理密钥代表什么？
或者，愿意分享您的 IE9 用户代理是什么，也许我们可以自己将其拼凑起来？
I installed IE9 in a Windows 7 virtual machine, and was surprised to see this user agent:
Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0; BOIE9;ENUSMSNIP)
In particular, the last two keys BOIE9 and ENUSMSNIP look very spammy. I'm used to seeing toolbars and add-ins register themselves at the end of the user agent like that, but this is on a virgin install of Windows 7 with no other software.
They're defined in the registry here:
HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\User Agent\PostPlatform
That key has a value of IEAK, which is apparently the Internet Explorer Administrators Kit which according to Microsoft sends a custom user agent string.
But why?
I'm guessing that BOIE9 is stands for "Bing on IE9". It's the only active Add-On:
As for ENUSMSNIP, I'm at a loss. My guesses are:
- ENUS = Locale, which for me is EN-US ("US English")
- MS = Microsoft
- NIP = ???
I tried changing my locale to EN-GB, but the user agent didn't update nor did the registry. So it appears it's only at the time of install that it matters (if I'm even right about ENUS).
Does anyone know what these two user agent keys represent?
Or, care to share what your IE9 user agent is, and maybe we can piece it together ourselves?
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大多数情况下，你有权利这样做。我认为这是模仿 Firefox/Chrome 较新的反网络钓鱼功能的结果。
You have the right of it, mostly. I think this is a result of emulating Firefox/Chrome's newer anti-phishing features.