OpenIntegrations/docs/en/examples/GRPC/InitializeClientStream.txt

    Address = "https://grpcb.in:9001";

    Proto1 = "https://hut.openintegrations.dev/test_data/grpcbin_with_import.proto"; // String, path to file or URL
    Proto2 = "https://hut.openintegrations.dev/test_data/mt.proto"; // String, path to file or URL

    Scheme = New Map;
    Scheme.Insert("main.proto"    , Proto1); // Primary
    Scheme.Insert("my_types.proto", Proto2); // For import in primary

    Parameters = OPI_GRPC.GetConnectionParameters(Address, Scheme);
    Tls        = OPI_GRPC.GetTlsSettings(True);

    Service = "grpcbin.GRPCBin";
    Method  = "DummyClientStream";

    Connection = OPI_GRPC.CreateConnection(Parameters, Tls);

    If Not OPI_GRPC.IsConnector(Connection) Then
        Raise Connection["error"];
    EndIf;

    StingsArray = New Array;
    StingsArray.Add("one");
    StingsArray.Add("two");
    StingsArray.Add("three");

    Data = New Map;
    Data.Insert("f_string" , "Test message");
    Data.Insert("f_int32"  , 123);
    Data.Insert("f_bool"   , True);
    Data.Insert("f_strings", StingsArray);
    Data.Insert("f_sub"    , New Structure("f_string", "Nested value"));

    Result = OPI_GRPC.InitializeClientStream(Connection, Service, Method); // <---

    If Not Result["result"] Then
        Raise Result["error"];
    Else
        StreamID = Result["streamId"];
    EndIf;

    FinalMessage = Undefined;

    Counter = 0;
    While True Do

        CurrentSend = OPI_GRPC.SendMessage(Connection, StreamID, Data);
        Counter     = Counter + 1;

        If Not CurrentSend["result"] Then

            Error = CurrentSend["error"];

            If Error         = "Timeout" Then
                Continue;
            ElsIf Error      = "Closed" Then
                FinalMessage = OPI_GRPC.GetMessage(Connection, StreamID);
                Break;
            Else
                Raise StrTemplate("%1 (sent messages %2)", Error, Counter);
            EndIf;

        Else

            If Counter       = 10 Then
                Completion   = OPI_GRPC.CompleteSend(Connection, StreamID);
                FinalMessage = OPI_GRPC.GetMessage(Connection, StreamID);
                Break;
            EndIf;

        EndIf;

    EndDo;