How to Get Client Information Such as Os and Browser

identify client machine Operating System by using request object in java web applications

Example using the user-agent-utils library:

public class SomeServlet extends HttpServlet {
  public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
      String userAgentString = request.getHeader("User-Agent");
      UserAgent userAgent = UserAgent.parseUserAgentString(userAgentString);
      OperatingSystem os = userAgent.getOperatingSystem();

      // Do stuff with os...
  }
}

You can read more about the OperatingSystem class here.

You can find the jar here.

How to get browser information of client?

You can install Wangkanai.Detection package. The full documentation could be found here: https://github.com/wangkanai/Detection

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

PM> install-package Wangkanai.Detection -pre

While it is still possible to install the individual package if you just need that specific resolver.

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  

Installation of Responsive library will bring in all dependency packages (This will include Wangkanai.Detection.Device).

PM> install-package Wangkanai.Responsive -pre

I think the following should be enough for you:

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

Then you need to configure the Startup.cs by adding the detection service in the ConfigureServices method:

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

And finally in your Controller, do something like this:

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;
        //...
    }
} 

How to detect my browser version and operating system using JavaScript?

Detecting browser's details:

var nVer = navigator.appVersion;
var nAgt = navigator.userAgent;
var browserName  = navigator.appName;
var fullVersion  = ''+parseFloat(navigator.appVersion); 
var majorVersion = parseInt(navigator.appVersion,10);
var nameOffset,verOffset,ix;

// In Opera, the true version is after "OPR" or after "Version"
if ((verOffset=nAgt.indexOf("OPR"))!=-1) {
 browserName = "Opera";
 fullVersion = nAgt.substring(verOffset+4);
 if ((verOffset=nAgt.indexOf("Version"))!=-1) 
   fullVersion = nAgt.substring(verOffset+8);
}
// In MS Edge, the true version is after "Edg" in userAgent
else if ((verOffset=nAgt.indexOf("Edg"))!=-1) {
 browserName = "Microsoft Edge";
 fullVersion = nAgt.substring(verOffset+4);
}
// In MSIE, the true version is after "MSIE" in userAgent
else if ((verOffset=nAgt.indexOf("MSIE"))!=-1) {
 browserName = "Microsoft Internet Explorer";
 fullVersion = nAgt.substring(verOffset+5);
}
// In Chrome, the true version is after "Chrome" 
else if ((verOffset=nAgt.indexOf("Chrome"))!=-1) {
 browserName = "Chrome";
 fullVersion = nAgt.substring(verOffset+7);
}
// In Safari, the true version is after "Safari" or after "Version" 
else if ((verOffset=nAgt.indexOf("Safari"))!=-1) {
 browserName = "Safari";
 fullVersion = nAgt.substring(verOffset+7);
 if ((verOffset=nAgt.indexOf("Version"))!=-1) 
   fullVersion = nAgt.substring(verOffset+8);
}
// In Firefox, the true version is after "Firefox" 
else if ((verOffset=nAgt.indexOf("Firefox"))!=-1) {
 browserName = "Firefox";
 fullVersion = nAgt.substring(verOffset+8);
}
// In most other browsers, "name/version" is at the end of userAgent 
else if ( (nameOffset=nAgt.lastIndexOf(' ')+1) < 
          (verOffset=nAgt.lastIndexOf('/')) ) 
{
 browserName = nAgt.substring(nameOffset,verOffset);
 fullVersion = nAgt.substring(verOffset+1);
 if (browserName.toLowerCase()==browserName.toUpperCase()) {
  browserName = navigator.appName;
 }
}
// trim the fullVersion string at semicolon/space if present
if ((ix=fullVersion.indexOf(";"))!=-1)
   fullVersion=fullVersion.substring(0,ix);
if ((ix=fullVersion.indexOf(" "))!=-1)
   fullVersion=fullVersion.substring(0,ix);

majorVersion = parseInt(''+fullVersion,10);
if (isNaN(majorVersion)) {
 fullVersion  = ''+parseFloat(navigator.appVersion); 
 majorVersion = parseInt(navigator.appVersion,10);
}

document.write(''
 +'Browser name  = '+browserName+'<br>'
 +'Full version  = '+fullVersion+'<br>'
 +'Major version = '+majorVersion+'<br>'
 +'navigator.appName = '+navigator.appName+'<br>'
 +'navigator.userAgent = '+navigator.userAgent+'<br>'
)

How to find the operating system details using JavaScript?

If you list all of window.navigator's properties using

console.log(navigator);

PHP Laravel : How to get client browser/ Device?

First add the package to your composer:

{
    "require": {
        "hisorange/browser-detect": "2.*" // For laravel 5.* versions
        "hisorange/browser-detect": "1.*" // For laravel 4.* versions
    }
}

After the composer update/install add the service provider to your app.php:

'providers' => array(
    // ...
    'hisorange\BrowserDetect\Provider\BrowserDetectService',
    // ...
)

Add the alias to the aliases in your app.php:

'aliases' => array(
    // ...
    'BrowserDetect' => 'hisorange\BrowserDetect\Facade\Parser',
)

You must use personal configurations, just publish the package's configuration files, (plugins.php also published with this)

php artisan vendor:publish

You can get result informations by simply call on the facade.

// You can always get the result object from the facade if you wish to operate with it.
BrowserDetect::detect(); // Will resolve and return with the 'browser.result' container.

// Calls are mirrored to the result object for easier use.
BrowserDetect::browserVersion(); // return '3.6' string.

// Supporting human readable formats.
BrowserDetect::browserName(); // return 'Firefox 3.6' string.

// Or can be objective.
BrowserDetect::browserFamily(); // return 'Firefox' string.

For details: https://github.com/hisorange/browser-detect

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