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Go package for fast and reliable abstraction of browser user agent strings.
| Date | Stars |
|---|---|
| 2026-07-31 | 357 |
| 2026-08-06 | 357 |
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Momentum
0.0
growth rate 0.00%/day
[](https://travis-ci.org/LumenResearch/uasurfer) [](https://godoc.org/github.com/LumenResearch/uasurfer) [](https://goreportcard.com/report/github.com/LumenResearch/uasurfer)
# uasurfer
**User Agent Surfer** (uasurfer) is a lightweight Golang package that parses and abstracts [HTTP User-Agent strings](https://en.wikipedia.org/wiki/User_agent) with particular attention to device type.
The following information is returned by uasurfer from a raw HTTP User-Agent string:
| Name | Example | Coverage in 192,792 parses |
|----------------|---------|--------------------------------|
| Browser name | `chrome` | 99.85% |
| Browser version | `53` | 99.17% |
| Platform | `ipad` | 99.97% |
| OS name | `ios` | 99.96% |
| OS version | `10` | 98.81% |
| Device type | `tablet` | 99.98% |
Layout engine, browser language, and other esoteric attributes are not parsed.
Coverage is estimated from a random sample of real UA strings collected across thousands of sources in US and EU mid-2016.
## Usage
### Parse(ua string) Function
The `Parse()` function accepts a user agent `string` and returns UserAgent struct with named constants and integers for versions (minor, major and patch separately), and the full UA string that was parsed (lowercase). A string can be retrieved by adding `.String()` to a variable, such as `uasurfer.BrowserName.String()`.
```
// Define a user agent string
myUA := "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.85 Safari/537.36"
// Parse() returns all attributes, including returning the full UA string last
ua, uaString := uasurfer.Parse(myUA)
```
where example UserAgent is:
```
{
Browser {
BrowserName: BrowserChrome,
Version: {
Major: 45,
Minor: 0,
Patch: 2454,
},
},
OS {
Platform: PlatformMac,
Name: OSMacOSX,
Version: {
Major: 10,
Minor: 10,
Patch: 5,
},
},
DeviceType: DeviceComputer,
}
```
**Usage note:** There are some OSes that do not return a version, see docs below. Linux is typically not reported with a specific Linux distro name or version.
#### Browser Name
* `BrowserChrome` - Google [Chrome](https://en.wikipedia.org/wiki/Google_Chrome), [Chromium](https://en.wikipedia.org/wiki/Chromium_(web_browser))
* `BrowserSafari` - Apple [Safari](https://en.wikipedia.org/wiki/Safari_(web_browser)), Google Search ([GSA](https://itunes.apple.com/us/app/google/id284815942))
* `BrowserIE` - Microsoft [Internet Explorer](https://en.wikipedia.org/wiki/Internet_Explorer), [Edge](https://en.wikipedia.org/wiki/Microsoft_Edge)
* `BrowserFirefox` - Mozilla [Firefox](https://en.wikipedia.org/wiki/Firefox), GNU [IceCat](https://en.wikipedia.org/wiki/GNU_IceCat), [Iceweasel](https://en.wikipedia.org/wiki/Mozilla_Corporation_software_rebranded_by_the_Debian_project#Iceweasel), [Seamonkey](https://en.wikipedia.org/wiki/SeaMonkey)
* `BrowserAndroid` - Android [WebView](https://developer.chrome.com/multidevice/webview/overview) (Android OS <4.4 only)
* `BrowserOpera` - [Opera](https://en.wikipedia.org/wiki/Opera_(web_browser))
* `BrowserUCBrowser` - [UC Browser](https://en.wikipedia.org/wiki/UC_Browser)
* `BrowserSilk` - Amazon [Silk](https://en.wikipedia.org/wiki/Amazon_Silk)
* `BrowserQQ` - Tencent [QQ](https://en.wikipedia.org/wiki/Tencent_QQ)
* `BrowserSpotify` - [Spotify](https://en.wikipedia.org/Excerpt of 8,825 characters
Read on GitHubWould you bet a product on this? Bounded 0–100 and slow moving.
Not classified yet. Classification runs as part of npm run ingest.