如何获取客户端的浏览器信息？

Question

How can I get browser information for client in asp.net core 3.0.1, I tried to use this code, but, it return me the full list of user's browsers, but, I need the browser that user using it.

我使用的代码：

var userAgent = Request.Headers["User-Agent"].ToString();

我也试过这段代码，但是，它给我错误：

UserAgent.UserAgent ua = new UserAgent.UserAgent(userAgent);

我搜索了很多 link，但是，我没有找到我需要的东西，而且，这是我搜索的一些 link：

Is there any way to get the browser name and version that client run the application from it using Asp.Net Core 3.0.1?

Answer 1

您可以安装 Wangkanai.Detection 包。完整的文档可以在这里找到：https://github.com/wangkanai/Detection

Installation of detection library is now done with a single package reference point.

PM> install-package Wangkanai.Detection -pre

虽然如果您只需要特定的解析器，仍然可以安装单独的软件包。

PM> install-package Wangkanai.Detection.Device -pre  
PM> install-package Wangkanai.Detection.Browser -pre  
PM> install-package Wangkanai.Detection.Engine -pre   //concept
PM> install-package Wangkanai.Detection.Platform -pre //concept
PM> install-package Wangkanai.Detection.Crawler -pre

安装 Responsive 库将引入所有依赖包（这将包括 Wangkanai.Detection.Device）。

PM> install-package Wangkanai.Responsive -pre

我认为以下内容对您来说应该足够了：

install-package Wangkanai.Detection -pre 
install-package Wangkanai.Detection.Browser -pre

然后需要在ConfigureServices方法中添加检测服务来配置Startup.cs：

public void ConfigureServices(IServiceCollection services)
{
   // Add detection services container and device resolver service.
    services.AddDetection();
    services.AddDetectionCore().AddBrowser();
    // Add framework services.
    services.AddMvc();
}

最后在您的 Controller 中，执行如下操作：

public class HomeController : Controller
{
    private readonly IDetection _detection;

    public HomeController(IDetection detection)
    {
        _detection = detection;
    }

    public IActionResult Index()
    {
        string browser_information = _detection.Browser.Type.ToString() +
                                     _detection.Browser.Version;
        //...
    }
}

Answer 2

您可以使用旨在提供可靠语义解析的this nuget package。

为了做一个简单的例子，我将使用单例而不是依赖注入：

public static class YauaaSingleton
{
    private static UserAgentAnalyzer.UserAgentAnalyzerBuilder Builder { get; }

    private static readonly Lazy<UserAgentAnalyzer> analyzer = new Lazy<UserAgentAnalyzer> (() => Builder.Build());

    public static UserAgentAnalyzer Analyzer
    {
        get
        {
            return analyzer.Value;
        }
    }

    static YauaaSingleton()
    {
        Builder = UserAgentAnalyzer.NewBuilder();
        Builder.DropTests();
        Builder.DelayInitialization();
        Builder.WithCache(100);
        Builder.HideMatcherLoadStats();
        Builder.WithAllFields();
    }
}

然后在你的控制器中：

var userAgentString  = this.HttpContext?.Request?.Headers?.FirstOrDefault(s => s.Key.ToLower() == "user-agent").Value;
var ua = YauaaSingleton.Analyzer.Parse(userAgentString);
var browserNameField = ua.Get(DefaultUserAgentFields.AGENT_NAME);
var browserVersionField = ua.Get(DefaultUserAgentFields.AGENT_VERSION);
Debug.WriteLine(browserNameField.GetValue());
Debug.WriteLine(browserVersionField.GetValue());

对于工作示例，您可以找到完整的 asp.net 核心项目 here

如何获取客户端的浏览器信息？

How to get browser information of client?

c#

browser

.net-core

asp.net-core-3.0