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What's Covered

This tutorial illustrates how to return a match for a Device Id. It shows how to first get the Device Id from a match, then get a match for that Device Id and return the value of the IsMobile property. This can be useful to look at devices that have already been matched at a previous date.

Code and Explanation

Match with device id example of using 51Degrees device detection. The example shows how to:

  1. Instantiate the 51Degrees device detection provider.

    provider = FiftyOneDegreesPatternV3.NewProvider(dataFile)
  2. Produce a match for a single device id

    match = provider.GetMatchForDeviceId(deviceId)
  3. Extract the value of the IsMobile property

This example assumes you have the 51Degrees Go API installed correctly.
Full Source File
package main

import (

// Location of data file.
var dataFile = "../data/51Degrees-LiteV3.2.dat"

// Which properties to retrieve
var properties = []string{"IsMobile", "PlatformName", "PlatformVersion"}

// Provides access to device detection functions.
var provider =

// User-Agent string of an iPhone mobile device.
var mobileUserAgent = "Mozilla/5.0 (iPhone; CPU iPhone OS 7_1 like Mac OS X) " +
    "AppleWebKit/537.51.2 (KHTML, like Gecko) 'Version/7.0 Mobile/11D167 " +

// User-Agent string of Firefox Web browser version 41 on desktop.
var desktopUserAgent = "Mozilla/5.0 (Windows NT 6.3; WOW64; rv:41.0) " +
    "Gecko/20100101 Firefox/41.0"

// User-Agent string of a MediaHub device.
var mediaHubUserAgent = "Mozilla/5.0 (Linux; Android 4.4.2; X7 Quad Core " +
    "Build/KOT49H) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 " +
    "Chrome/ Safari/537.36"

func main() {
    fmt.Println("Starting Match With Device Id Example.")

    // Fetches the device id for a mobile User-Agent.
    var match = provider.GetMatch(mobileUserAgent)
    var mobileDeviceId = match.GetDeviceId()

    // Fetches the device id for a desktop User-Agent.
    match = provider.GetMatch(desktopUserAgent)
    var desktopDeviceId = match.GetDeviceId()

    // Fetches the device id for a MediaHub User-Agent.
    match = provider.GetMatch(mediaHubUserAgent)
    var mediaHubDeviceId = match.GetDeviceId()

    // Carries out a match with a mobile device id.
    fmt.Println("\nMobile Device Id: ", mobileDeviceId)
    match = provider.GetMatchForDeviceId(mobileDeviceId)
    fmt.Println("   IsMobile: ", match.GetValue("IsMobile"))

    // Carries out a match with a desktop device id.
    fmt.Println("\nDesktop Device Id: ", desktopDeviceId)
    match = provider.GetMatchForDeviceId(desktopDeviceId)
    fmt.Println("   IsMobile: ", match.GetValue("IsMobile"))

    // Carries out a match with a MediaHub device id.
    fmt.Println("\nMediaHub Device Id: ", mediaHubDeviceId)
    match = provider.GetMatchForDeviceId(mediaHubDeviceId)
    fmt.Println("   IsMobile: ", match.GetValue("IsMobile"))

Full Source File


In this tutorial you have seen how to use the detector to retrieve the IsMobile property for a pre-defined Device ID string. The example can easily be modified to retrieve the value of any other property. Premium and Enterprise data files provide considerably more properties such as IsCrawler , PriceBand , HardwareVendor and ScreenInchesWidth . For a full list of properties and the data files they exist in please see the Property Dictionary .