Is `google/protobuf/struct.proto` the Best Way to Send Dynamic JSON Data via gRPC?

Is "google/protobuf/struct.proto" the Optimal Method for Transmitting Dynamic JSON via GRPC?

Using google/protobuf/struct.proto can be an effective method for transmitting dynamic JSON objects through GRPC.

Using google/protobuf/struct

The google/protobuf/struct.proto provides a general-purpose data structure for representing JSON objects in Protobuf messages. It includes two key message types:

• Value - Represents individual JSON values (e.g., string, number, list)
• Struct - Represents a collection of field-value pairs

Dynamic JSON

Dynamic JSON refers to unstructured or flexible data stored as a string. If your data follows a predefined schema, defining a custom Protobuf message type may be more efficient.

Proto File

Your proto file (User.proto) uses google/protobuf/struct.proto to declare a SendJsonRequest message. The Details field is of type Struct, allowing for dynamic JSON data to be passed in.

Client Code

Your client code creates an instance of structpb.Struct using structpb.NewStruct(), which converts a map[string]interface{} to a Struct object.

Alternative Solutions

Anuj's Solution

This solution is more complex and involves manually converting each map entry to a structpb.Value, requiring more code than necessary.

Luke's Solution

While more concise, this solution still involves converting from map to bytes and then to structpb.Struct.

Solution from a Different Approach

The suggested solution uses structpb.NewStruct() directly to create a Struct object from a map, eliminating the need for intermediate conversion.

Conclusion

Using google/protobuf/struct.proto can be a suitable option for transmitting dynamic JSON over GRPC when working with unstructured or flexible data. However, if your data follows a specific schema, defining a custom Protobuf message may offer increased efficiency and type safety.

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