node.js - 如何在 gRPC nodejs 客户端中解压 google.protobuf.Any 类型？

Question

我的protobuf文件是这样的:

syntax = "proto3"; import "google/protobuf/any.proto";

service RoomService {
    getTestAny (Hotelid) returns (google.protobuf.Any); }

message Hotelid {
    string hotelid = 1; 
} 

message HtlInDate {
    Hotelid hotelid = 1;
    string date = 2; 
}

我的 java-gRPC-server 代码是这样的:

@Override
public void getTestAny(Roomservice.Hotelid request, StreamObserver<Any> responseObserver) {

    Roomservice.Hotelid hotelid = Roomservice.Hotelid.newBuilder()
                                             .setHotelid("This is Hotelid")
                                             .build();

    Roomservice.HtlInDate htlDate = Roomservice.HtlInDate.newBuilder()
                                               .setHotelid(hotelid)
                                               .setDate("This is Data")
                                               .build();

    responseObserver.onNext(Any.pack(htlDate));
    responseObserver.onCompleted();
}

然后我从 nodejs-gRPC-client 发出请求，代码如下:

function () {
    var client = new services.RoomServiceClient('localhost:6565',
        grpc.credentials.createInsecure());

    var request = new messages.Hotelid();
    var hotelid = "ignore";

    request.setHotelid(hotelid);

    var call = client.getTestAny(request, function (err, response) {

        var obj = response.toObject();

        console.log(obj);
    });
}

nodejs-gRPC-client中的response是Any类型。它包含一个数据数组:

array:["type.googleapis.com/HtlInDate", Uint8Array[10,17,10...]]

我尝试使用 response.toObject() 来获取 HtlInDate 实例，但我只是这样:

obj:{
   typeUrl:"type.googleapis.com/HtlInDate",
   value:"ChEKD1RoaXMgaXMgSG90ZWxpZBIMVGhpcyBpcyBEYXRh"
}

So how can I unpack the Any type response and get the HtlInDate instance exactly? Thanks a lot if you have any idea about this!

Answer 1

目前Node.js不支持google.protobuf.Any类型，无论是gRPC默认使用的Protobuf.js还是官方首发的google-protobuf派对 protobuf 实现。