Can not use customized struct type

[Tengfei Jiang]

Hi, I define a customized struct type, and use it as return type of a function in services class.
struct my_info { QString name; };
I used Q_DECLARE_METATYPE and qRegisterMetaType to register the type.
However, I found that the function JsonRpcServer::createResponse failed because
return_value.type() == QVariant::UserType is not well handled.

Could you fix this?

[Jonas Collberg]

Hi,

I think what you suggest is on a higher level of abstraction than what the library aims for. Adding support for general (user) data types as return values and parameters would require some sort of serialization, and I don't think it's the responsibility of a JSON RPC library to provide this.

As a way to work around this, I suggest that you first convert your my_info struct to a QVariantMap:

auto m = QVariantMap{
    {"name", "John Doe"},
    {"age", 1337}
};

Then you can pass that QVariantMap to one of the call methods. For instance: auto result = rpc_client->call("person", m);

Of course, on the receiving end you would have to deserialize this and create a my_info struct if needed.

If you need more advanced forms of serialization, you could use Base64-encoded strings.

Was this helpful?