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Go/Golang parser for user agent strings
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# Go/Golang package for parsing user agent strings [](https://godoc.org/github.com/mileusna/useragent)
Use `useragent.Parse(userAgent string)` function to parse browser's and bot's user agents strings and get:
+ 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
Stable. I use it on high traffic websites on every single request, as well on my [Lite Analytics](https://liteanalytics.com/) service.
I constantly improve user agents detection and performance. Fill free to report an issue for any User-Agent string not recognized or misinterpreted.
## Installation <a id="installation"></a>
```
go get github.com/mileusna/useragent
```
## Example<a id="example"></a>
```go
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 := useragent.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 `useragent.Parse()`, there is a bunch of shorthand functions for most popular browsers and operating systems, so this code:
```go
ua := useragent.Parse(userAgentString)
if ua.OS == "Android" && ua.Name == "Chrome" {
// do something
}
```
can be also written on this way:
```go
ua := useragent.Parse(userAgentString)
if ua.IsAndroid() && ua.IsChrome() {
// do something
}
```
## Version parsing
Since **v1.3.4**, the package also parses the version strings of the **Browser** and **OS** into the `VersionNo` struct. The raw version string from the user agent might look something like `100.0.4896.127`. Although this is the full version string, it may not be suitable for various checks you might need to perform in your web services.
To address this, the version strings are parsed into their individual components. After parsing, you can easily check each segment of the Excerpt of 5,263 characters
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