broid

A browser fingerprinting library that only runs on the server.

Installing

go get github.com/sevings/broid

Usage

Import the package into your project. Then create a new BrowserIDBuilder. The default BrowserIDBuilder contains functions for computing a BrowserID based on the "User-Agent", "Accept", "Accept-Encoding" and "Accept-Language" headers. This allows you to distinguish between hundreds of browser versions. You can improve accuracy by adding more browser characteristics for computing using AddField(). Call Build() to obtain the BrowserID of the browser that made the request.

package main

import (
	"fmt"
	"github.com/sevings/broid"
	"io"
	"log"
	"net/http"
)

func main() {
	builder := broid.NewDefaultBrowserIDBuilder()

	idHandler := func(w http.ResponseWriter, req *http.Request) {
		id := builder.Build(req).String()
		io.WriteString(w, fmt.Sprintf("The ID of your browser is %s.", id))
	}

	http.HandleFunc("/id", idHandler)
	log.Fatal(http.ListenAndServe(":8080", nil))
}