Go/Golang package for parsing user agent strings

Package ua.New(userAgent string) function parses browser’s and bot’s user agents strings and determins:

• User agent name and version (Chrome, Firefox, Googlebot, etc.)
• Operating system name and version (Windows, Android, iOS etc.)
• Device type (mobile, desktop, tablet, bot)
• Device name if available (iPhone, iPad, Huawei VNS-L21)
• URL provided by the bot (http://www.google.com/bot.html etc.)

Status

Still need some work on detecting Android device names.

Fill free to report an issue for any User-Agent string not recognized or misinterpreted.

Installation

go get -u -v github.com/houseme/mobiledetect/ua

Example

package main

import (
    "fmt"
    "strings"

    "github.com/houseme/mobiledetect/ua"
)

func main() {
    userAgents := []string{
        "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/603.3.8 (KHTML, like Gecko) Version/10.1.2 Safari/603.3.8",
        "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36",
        "Mozilla/5.0 (iPhone; CPU iPhone OS 10_3_2 like Mac OS X) AppleWebKit/603.2.4 (KHTML, like Gecko) Version/10.0 Mobile/14F89 Safari/602.1",	
        "Mozilla/5.0 (iPhone; CPU iPhone OS 10_3_2 like Mac OS X) AppleWebKit/603.2.4 (KHTML, like Gecko) FxiOS/8.1.1b4948 Mobile/14F89 Safari/603.2.4",
        "Mozilla/5.0 (iPad; CPU OS 10_3_2 like Mac OS X) AppleWebKit/603.2.4 (KHTML, like Gecko) Version/10.0 Mobile/14F89 Safari/602.1",
        "Mozilla/5.0 (Linux; Android 4.3; GT-I9300 Build/JSS15J) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.125 Mobile Safari/537.36",
        "Mozilla/5.0 (Android 4.3; Mobile; rv:54.0) Gecko/54.0 Firefox/54.0",
        "Mozilla/5.0 (Linux; Android 4.3; GT-I9300 Build/JSS15J) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.91 Mobile Safari/537.36 OPR/42.9.2246.119956",
        "Opera/9.80 (Android; Opera Mini/28.0.2254/66.318; U; en) Presto/2.12.423 Version/12.16",
    }

    for _, s := range userAgents {
        ua := ua.New(s)
        fmt.Println()
        fmt.Println(ua.UA())
        fmt.Println(strings.Repeat("=", len(ua.UA())))
        fmt.Println("Name:", ua.Name(), "v", ua.Version())
        fmt.Println("OS:", ua.OS(), "v", ua.OSVersion())
        fmt.Println("Device:", ua.Device())
        if ua.Mobile() {
            fmt.Println("(Mobile)")
        }
        if ua.Tablet() {
            fmt.Println("(Tablet)")
        }
        if ua.Desktop() {
            fmt.Println("(Desktop)")
        }
        if ua.Bot() {
            fmt.Println("(Bot)")
        }
        if ua.URL() != "" {
            fmt.Println(ua.URL())
        }
        fmt.Printf("%v\n", ua.Mobile())   // => true
        fmt.Printf("%v\n", ua.Bot())      // => false
        fmt.Printf("%v\n", ua.Mozilla())  // => "5.0"
        fmt.Printf("%v\n", ua.Model())    // => "Nexus One"
    
        fmt.Printf("%v\n", ua.Platform()) // => "Linux"
        fmt.Printf("%v\n", ua.OS())       // => "Android 2.3.7"
    
        name, version := ua.Engine()
        fmt.Printf("%v\n", name)          // => "AppleWebKit"
        fmt.Printf("%v\n", version)       // => "533.1"
    
        name, version = ua.Browser()
        fmt.Printf("%v\n", name)          // => "Android"
        fmt.Printf("%v\n", version)       // => "4.0"
    
        // Let's see an example with a bot.
    
        ua.Parse("Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)")
    
        fmt.Printf("%v\n", ua.Bot())      // => true
    
        name, version = ua.Browser()
        fmt.Printf("%v\n", name)          // => Googlebot
        fmt.Printf("%v\n", version)       // => 2.1
    }
}

Shorthand functions

Beside UserAgent{} struct and its properties returned by ua.New(), there is a bunch of shorthand functions for the most popular browsers and operating systems, so this code:

    ua := ua.New(userAgentString)
    if ua.OS == "Android" && ua.Name == "Chrome" {
        // do something
    }

can be written in this way:

    ua := ua.New(userAgentString)
    if ua.IsAndroid() && ua.IsChrome() {
        // do something
    }

Notice

• Opera and Opera Mini are two browsers, since they operate on very different ways.
• If Googlebot (or any other bot) is detected, and it is using its mobile crawler, both bot and mobile flags will be set to true.

License

Go Mobile Detect is an open-source script released under MIT License. thanks for mileusna and mssola.