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Golang API

What's Covered

51Degrees device detector returns all detection results as a string. This tutorial demonstrates how to return results for the IsMobile property value as a boolean.

Code and Explanation

Getting started example of using 51Degrees Hash Trie device detection. The example shows how to:

  1. Instantiate the 51Degrees device detection provider.

    var provider = FiftyOneDegreesTrieV3.NewProvider(dataFile)

  2. Produce a match for a single HTTP User-Agent header

    var match = provider.GetMatch(userAgent)

  3. Extract the value of the IsMobile property as a boolean

    if match.GetValue("IsMobile") == "True"{
    	return true
    return false

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-LiteV3.4.trie"

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

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

// 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"

// isMobile function. Takes a User-Agent as an argument, carries out a
// match and returns a boolean value for the IsMobile property of the
// matched device.
func isMobile(userAgent string) bool{
    var match = provider.GetMatch(userAgent)
    if match.GetValue("IsMobile") == "True"{
        return true
    return false

func main() {
    fmt.Println("Mobile User-Agent: ", mobileUserAgent)

    // Determines whether the mobile User-Agent is a mobile device.
    if isMobile(mobileUserAgent){
    fmt.Println("   Mobile")
    fmt.Println("   Non-Mobile")}

    // Determines whether the desktop User-Agent is a mobile device.
    fmt.Println("Desktop User-Agent: ", desktopUserAgent)
    if isMobile(desktopUserAgent) {
        fmt.Println("   Mobile")
    }else {
        fmt.Println("   Non-Mobile")

    // Determines whether the MediaHub User-Agent is a mobile device.
    fmt.Println("Media Hub User-Agent: ", mediaHubUserAgent)
    if isMobile(mediaHubUserAgent) {
        fmt.Println("   Mobile")
    }else {
        fmt.Println("   Non-Mobile")

Full Source File


In this tutorial you have seen how to use the detector to retrieve the IsMobile property for a pre-defined User-Agent string. It sets a boolean value to true or false from the original string value of "True" or "False", making if statements simpler to test.