hanayo/modules/locale/parse_header.go
2019-02-23 13:29:15 +00:00

39 lines
670 B
Go

package locale
import (
"sort"
"strconv"
"strings"
)
// ParseHeader parses an Accept-Language header, and sorts the values.
func ParseHeader(header string) []string {
if header == "" {
return nil
}
parts := strings.Split(header, ",")
sort.Slice(parts, func(i, j int) bool {
return getQuality(parts[i]) > getQuality(parts[j])
})
for idx, val := range parts {
parts[idx] = strings.Replace(strings.SplitN(val, ";q=", 2)[0], "-", "_", 1)
}
return parts
}
func getQuality(s string) float32 {
idx := strings.Index(s, ";q=")
if idx == -1 {
return 1
}
f, err := strconv.ParseFloat(s[idx+3:], 32)
if err != nil {
return 1
}
return float32(f)
}