msg->get_properties() not working in message_arrived

[greg887]

Is there a bug in msg->get_properties() ? Am I doing anything wrong? I looked at the properties samples and I'm using it in the same way. I tried different brokers thinking something in the broker could be wrong and I get the same results. I also installed the latest mosquitto broker in my laptop and used localhost as broker and it didn't work.

properties in paho cpp are not working when I use msg->get_properties() in message_arrived, but properties in message_arrive work in python. I run both subscribers the python version and the cpp version at the same time subscribing to the same topic (the publisher is in c++)

Subscriber python version output: Received message: Hello, MQTT! on topic ggg/test/topic Message Properties: [UserProperty : [('key1', 'value1'), ('key2', 'value2')]]

Subscriber c++ output: Message arrived: ggg/test/topic -> Hello, MQTT! No hay user property, porqueeee?? (This means "There is no user property, whyyyy?" ) Is props empty? '1' props size: '0'

Below is my c++ subscriber message_arrived code ` void message_arrived(mqtt::const_message_ptr msg) override { std::cout << "Message arrived: " << msg->get_topic() << " -> " << msg->to_string() << std::endl;

    const mqtt::properties& props = msg->get_properties();

    if (props.contains(mqtt::property::USER_PROPERTY)){
        std::cout << "Lo logrè, mamà\n" << std::endl;
    }
    else {
        std::cout << "No hay user property, porqueeee??" << std::endl;
    }

    std::cout << "Is props empty? '" << props.empty() << "'" << std::endl;
    std::cout << "props size: '" << props.size() << "'" << std::endl;

}`

Please kindly help!

[fpagliughi]

I was working on properties recently. Hopefully I didn’t add a bug.

What version of the library are you using?

[greg887]

const uint32_t VERSION = 0x01030001;
/** The version string for the client library  */
const string VERSION_STR("Paho MQTT C++ (mqttpp) v. 1.3.1");

thanks for all the amazing work!

[fpagliughi]

It seems to be working fine in the latest 'develop' branch, which I'm working on at the moment (for the next v1.5 release). I'll double check v1.3.1 to see what I can can find, but I don't see any modifications in the message class that would explain it; nor anything in the changelog mentioning a fix.

But just FYI, I've recently dropped a bunch of stuff in the code to make it easier to deal with properties on incoming messages and server responses. Like an iterator for properties and a few more methods to get it to act like an STL collection, like begin(), end(), etc. Plus a stream inserter for property for printing them out.

[greg887]

I just installed v1.4.0 and I'm still getting the same error, I removed paho 1.3.1 and re-install paho.

Do you have any estimate of when v1.5 could be released?

Those are going to be great features.

Thanks!