Question

`您好，

我试图在我的servlet过滤器中获取用户的浏览器信息。我使用了一个简单的代码，见下文。

String userAgent = request.getHeader("User-Agent");

用户正在使用Google Chrome，上面的代码打印在下面。

Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.135 Safari/537.36

它打印了所有主要浏览器的名称，而不是在应用程序运行后获取。这有什么不对？

Answer 1

这里没有错。

例如，让我们考虑返回的字符串是

Mozilla / 5.0（Windows NT 6.1）AppleWebKit / 537.36（KHTML，与Gecko一样）Chrome / 41.0.2228.0 Safari / 537.36

然后说明是

ChromeChrome 41.0.2228.0

Mozilla ==> 

MozillaProductSlice. Claims to be a Mozilla based user agent, which is only true for Gecko browsers like Firefox and Netscape. For all other user agents it means 'Mozilla-compatible'. In modern browsers, this is only used for historical reasons. It has no real meaning anymore

5.0 ==> Mozilla version

Windows NT 6.1  ==> Operating System Windows 7 

AppleWebKit  ==> The Web Kit provides a set of core classes to display web content in windows

537.36       ==> Web Kit build
KHTML        ==> Open Source HTML layout engine developed by the KDE project
like Gecko   ==> like Gecko...
Chrome  Name ==> Chrome
41.0.2228.0  ==> Chrome version
Safari       ==> Based on Safari
537.36       ==> Safari build

Description:    Free open-source web browser developed by Google. 
Chromium is the name of the open source project behind Google Chrome, released under the BSD license.

您可以在以下链接中找到更多信息

http://www.useragentstring.com/pages/Chrome/

点击页面上的每个链接以获取更多信息

无法从标题中正确获取“User-Agent”

1 个答案: