Socket.IO support on Azure

Copper Contributor

Feb 11, 2024

Hello to all, I'm trying to switch from a self hosted Socket.IO server (on Node app on Azure ACA) to Azure Web PubSub for Socket.IO.

I'm facing problems to connect my Arduino devices to the server: I always get an HTTP error 400 (the log message is RX:HTTP/1.1 400 Bad Request).

The connection worked fine on the hosted server.

As always, I'm using the code:

socketIO.begin("xxx.webpubsub.azure.com", 443, "/clients/socketio/hubs/hhh");

socketIO.onEvent(eventHandler);

and I tried also the follow code, but no way:

        String path = "/clients/socketio/hubs/hhh/?EIO=4";
        wsClient->setExtraHeaders("Connection:Upgrade");
        wsClient->setExtraHeaders("Upgrade:websocket");
        wsClient->setExtraHeaders("Sec-WebSocket-Extensions:permessage-deflate; client_max_window_bits");
        wsClient->setExtraHeaders(("hear-auth:" + accessToken).c_str());

        // try ever 1000 again if connection has failed
        wsClient->setReconnectInterval(500);

        //    event handler
        wsClient->onEvent(this->webSocketEvent);
        Serial.println("Socket.io host is: '" + socketServerUrl + "', path is: " + path);
        wsClient->begin(socketServerUrl.c_str(), 443, path.c_str());

Do you have some suggestions? Thanks !!

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Socket.IO support on Azure