User-Agent parsing using c#

Question

I have a large list of User-agent strings. For the analytic panel I need to parse them and split to:

1. Browser name, version.
2. Platform name, version

Is there is a ready solution or code to do this? Like there: http://useragentstring.com/

Answer 1

I know this is awfull but I could not find anything better,

public static class UserAgentParser
{
    /// <summary>
    /// Extracts human readible Operating system name.
    /// </summary>
    /// <param name="userAgent">User Agent string from Request.</param>
    /// <returns>Human readible Operating system name.</returns>
    public static string GetOperatingSystem(string userAgent)
    {
        var clientOsName = string.Empty;
        if (userAgent.Contains("Windows 98"))
            clientOsName = "Windows 98";
        else if (userAgent.Contains("Windows NT 5.0"))
            clientOsName = "Windows 2000";
        else if (userAgent.Contains("Windows NT 5.1"))
            clientOsName = "Windows XP";
        else if (userAgent.Contains("Windows NT 6.0"))
            clientOsName = "Windows Vista";
        else if (userAgent.Contains("Windows NT 6.1"))
            clientOsName = "Windows 7";
        else if (userAgent.Contains("Windows NT 6.2"))
            clientOsName = "Windows 8";
        else if (userAgent.Contains("Windows"))
        {
            clientOsName = GetOsVersion(userAgent, "Windows");
        }
        else if (userAgent.Contains("Android"))
        {
            clientOsName = GetOsVersion(userAgent, "Android");
        }
        else if (userAgent.Contains("Linux"))
        {
            clientOsName = GetOsVersion(userAgent, "Linux");
        }
        else if (userAgent.Contains("iPhone"))
        {
            clientOsName = GetOsVersion(userAgent, "iPhone");
        }
        else if (userAgent.Contains("iPad"))
        {
            clientOsName = GetOsVersion(userAgent, "iPad");
        }
        else if (userAgent.Contains("Macintosh"))
        {
            clientOsName = GetOsVersion(userAgent, "Macintosh");
        }
        else
        {
            clientOsName = "Unknown OS";
        }

        return clientOsName;
    }

    private static string GetOsVersion(string userAgent, string osName)
    {
        if (userAgent.Split(new[] {osName}, StringSplitOptions.None)[1].Split(new[]{';',')'}).Length != 0)
            {
                return string.Format("{0}{1}", osName,userAgent.Split(new[] { osName }, StringSplitOptions.None)[1].Split(new[] { ';', ')' })[0]);
            }

        return osName;
    }
}

[TestFixture]
public class UserAgentParserTest
{

    public IEnumerable<TestCaseData> UserAgentStringTestData()
    {
        yield return new TestCaseData("Mozilla/5.0 (iPhone; CPU iPhone OS 5_0 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A334 Safari/7534.48.3", "iPhone");
        yield return new TestCaseData("Mozilla/5.0 (iPad; CPU OS 5_0 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A334 Safari/7534.48.3", "iPad");
        yield return new TestCaseData("Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.11 (KHTML, like Gecko) Ubuntu/11.04 Chromium/17.0.963.56 Chrome/17.0.963.56 Safari/535.11", "Linux x86_64");
        yield return new TestCaseData("Mozilla/5.0 (X11; Linux i686) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.56 Safari/535.11", "Linux i686");
        yield return new TestCaseData("Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.56 Safari/535.11", "Windows 7");
        yield return new TestCaseData("Mozilla/5.0 (Windows NT 6.0; WOW64) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.56 Safari/535.11", "Windows Vista");
        yield return
            new TestCaseData(
                "Mozilla/5.0 (Windows NT 6.2) AppleWebKit/537.4 (KHTML, like Gecko) Chrome/22.0.1229.94 Safari/537.4", "Windows 8");
        yield return
            new TestCaseData(
                "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1063.0 Safari/536.3", "Windows XP");
        yield return
            new TestCaseData(
                "Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US) AppleWebKit/532.0 (KHTML, like Gecko) Chrome/3.0.198 Safari/532.0",
                "Windows 2000");
        yield return
            new TestCaseData(
                "Mozilla/5.0 (compatible; MSIE 7.0; Windows 98; SpamBlockerUtility 6.3.91; SpamBlockerUtility 6.2.91; .NET CLR 4.1.89;GB)", "Windows 98");
        yield return
            new TestCaseData(
                "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_4) AppleWebKit/537.13 (KHTML, like Gecko) Chrome/24.0.1290.1 Safari/537.13",
                "Macintosh");
        yield return
            new TestCaseData(
                "Mozilla/5.0 (X11; CrOS i686 2268.111.0) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.57 Safari/536.11",
                "Unknown OS");
        yield return
            new TestCaseData(
                "Mozilla/5.0 (Linux; U; Android 4.0.3; ko-kr; LG-L160L Build/IML74K) AppleWebkit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30",
                "Android 4.0.3");
        yield return
            new TestCaseData("Mozilla/1.22 (compatible; MSIE 10.0; Windows 3.1)", "Windows 3.1");
    }

    [Test]
    [TestCaseSource("UserAgentStringTestData")]
    public void UserAgentParsesOs(string userAgent, string expectedOs)
    {
        Assert.AreEqual(expectedOs, UserAgentParser.GetOperatingSystem(userAgent));
    }
}

Answer 2

I recommend installing DannyBoyNg's UserAgentParser to anyone struggling with this issue, as it can easily be downloaded and installed through NuGet. Note that this software is now considered legacy.

So for the information you're trying to get, here is what you would do:

using UserAgentParser;
...
var ua = UserAgent.Parse(Request.UserAgent.ToString());
string b = ua.Browser.ToString() + ", " + ua.BrowserVersion.ToString();
string p = ua.Platform.ToString();

Sorry, there isn't any support for exact versions here, so if you want to differentiate between Windows 10 version 1607 and version 1903, you're out of luck.

Another thing you'll need to do is add an extra line to the assemblies tag in Web.config

<add assembly="netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51"/>

I wish you didn't have to, but I can't see any workaround for this at the moment.