Go/Golang package for parsing user agent strings

Package ua.Parse(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 Andorid device names.

Installation

go get github.com/mileusna/useragent

Example

package main

import (
    "fmt"
    "strings"

    "github.com/mileusna/useragent"
)

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.Parse(s)
        fmt.Println()
        fmt.Println(ua.String)
        fmt.Println(strings.Repeat("=", len(ua.String)))
        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)
        }
    }
}

Shorthand functions

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

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

can be also written on this way:

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

Notice