package handler import ( "bytes" "fmt" "git.frostfs.info/TrueCloudLab/frostfs-http-gw/internal/logs" "git.frostfs.info/TrueCloudLab/frostfs-http-gw/utils" "github.com/valyala/fasthttp" "go.uber.org/zap" ) func filterHeaders(l *zap.Logger, header *fasthttp.RequestHeader) (map[string]string, error) { var err error result := make(map[string]string) prefix := []byte(utils.UserAttributeHeaderPrefix) header.VisitAll(func(key, val []byte) { // checks that the key and the val not empty if len(key) == 0 || len(val) == 0 { return } // checks that the key has attribute prefix if !bytes.HasPrefix(key, prefix) { return } // removing attribute prefix clearKey := bytes.TrimPrefix(key, prefix) clearKey = utils.TransformIfSystem(clearKey) // checks that the attribute key is not empty if len(clearKey) == 0 { return } // check if key gets duplicated // return error containing full key name (with prefix) if _, ok := result[string(clearKey)]; ok { err = fmt.Errorf("key duplication error: %s", string(key)) return } // make string representation of key / val k, v := string(clearKey), string(val) result[k] = v l.Debug(logs.AddAttributeToResultObject, zap.String("key", k), zap.String("val", v)) }) return result, err }