storj/private/useragent/info.go

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// Copyright (C) 2019 Storj Labs, Inc.
// See LICENSE for copying information.
// Package useragent implements parts of https://tools.ietf.org/html/rfc7231#section-5.5.3 and
// https://tools.ietf.org/html/rfc2616#section-14.43
package useragent
import (
"strings"
"github.com/zeebo/errs"
)
// Error is the default error class.
var Error = errs.Class("useragent")
// Info contains parsed user agent.
type Info struct {
Product Product
Full string
}
// Product is an user agent product.
type Product struct {
Name string
Version string
}
// Parse parses user agent string to information.
func Parse(s string) (Info, error) {
if s == "" {
return Info{}, nil
}
s = strings.TrimSpace(s)
info := Info{}
info.Full = s
parts := strings.SplitN(s, " ", 2)
productTokens := strings.SplitN(parts[0], "/", 2)
if len(productTokens) >= 1 {
info.Product.Name = productTokens[0]
}
if len(productTokens) >= 2 {
info.Product.Version = productTokens[1]
}
return info, nil
}