added heterogeneous configure file loader

infra/conf/v5cfg/common.go

@@ -0,0 +1,37 @@
+package v5cfg
+
+import (
+	"bytes"
+	"encoding/json"
+	"github.com/golang/protobuf/jsonpb"
+	"github.com/golang/protobuf/proto"
+	"github.com/v2fly/v2ray-core/v4/common/registry"
+	"github.com/v2fly/v2ray-core/v4/common/serial"
+	"strings"
+)
+
+func loadHeterogeneousConfigFromRawJson(interfaceType, name string, rawJson json.RawMessage) (proto.Message, error) {
+	var implementationFullName string
+	if strings.HasPrefix(name, "#") {
+		// skip resolution for full name
+		implementationFullName = name
+	} else {
+		registryResult, err := registry.FindImplementationByAlias(interfaceType, name)
+		if err != nil {
+			return nil, newError("unable to find implementation").Base(err)
+		}
+		implementationFullName = registryResult
+	}
+	implementationConfigInstance, err := serial.GetInstance(implementationFullName)
+	if err != nil {
+		return nil, newError("unable to create implementation config instance").Base(err)
+	}
+
+	unmarshaler := jsonpb.Unmarshaler{AllowUnknownFields: false}
+	err = unmarshaler.Unmarshal(bytes.NewReader([]byte(rawJson)), implementationConfigInstance.(proto.Message))
+	if err != nil {
+		return nil, newError("unable to parse json content").Base(err)
+	}
+
+	return implementationConfigInstance.(proto.Message), nil
+}