Possible to stream with ArduinoJSON? about arduinowebsockets

[gilmaimon]

Best of luck! Let me know if you need help with it (my email is in my profile)

[gilmaimon]

Hi.

What kind of interface are you thinking about? You mean being able to do client.send(jsonObj)?

If you can add some code examples, it might help me understand exactly what you mean 😃

Gil.

[AlexanderWingard]

No, I think I mean being able to do serializeJson(obj, client); and deserializeJson(doc, client); like he is able to do with the regular WiFiClient

Why I started to look into this in the first place was that I caused a stack overflow by using that middle storage char[].

[gilmaimon]

You don't have to use a middle storage char[], you could use std::string which is returned by msg.rawData() which will not leak and is much safer.

I don't think it is correct to make WebsocketsClient a Stream, because a client is much more than just stream of data. For example, calling serializeJson(obj, client), do you expect the message to be sent as binary message or text? Maybe as the content of a ping?

You could try and extend the library by making WebsocketsClient inherit from the Arduino Stream class, which will give you your desired behavior. Personally, I much prefer the explicit sendJson you implemented.

Gil.

[AlexanderWingard]

Ok, cool! I will use rawData.

Fair, I understand your points on not modifying this library. But maybe I will give it an attempt to do a subclass as you suggest or try as suggested in arduinojson implementing a CustomWriter and a CustomReader. Not very skilled in C++ but I will share my results if I succeed.

Thanks!