WebSockets?

[klapligehesten]

Hi,

I am currently playing around with WebSockets in the newest build of the libesphttpd server.

I seems to run fine except from sending continuous frames frames. I have tried out a lot of different ways to get it working and have given up for now, but i will be happy if someone can tell me if there is something wrong with my code.

The following code is sending the frames ok but chrome i keeps saying: Error: WebSocket connection failed: Received start of new message but previous message is unfinished.

......
void ws_send_frames( WebSocket *m,  P_NODE p) {
    P_BME_LOG_REC b;
    char message[100];

    sprintf( message, "{\"bme280_log\":");

    cgiWebsocketSend( &httpdFreertosInstance.httpdInstance, ws, message, strlen( message), WEBSOCK_FLAG_MORE);

    P_NODE t = p;
    while(t != NULL) {
        b = (P_BME_LOG_REC)t->data;

        sprintf( buffer, "{\"bme280\":{\"ts\":\"%llu\",\"t\":\"%0.1f\",\"p\":\"%0.3f\",\"h\":\"%0.2f\"}}",
                b->timestamp, b->humidity, b->pressure, b->temperature);

        cgiWebsocketSend( &httpdFreertosInstance.httpdInstance, ws, message, strlen( message), WEBSOCK_FLAG_NONE);

        t = t->next;
    }

    cgiWebsocketSend( &httpdFreertosInstance.httpdInstance, ws, message, strlen( message), WEBSOCK_FLAG_NONE);

}
......

Cheers - HPSchultz

[chmorgan]

HI @klapligehesten.

I'm not sure if the web socket implementation in libesphttpd is working correctly. Have you looked at the echo example? I think it may be in the demo repository.

If you do end up figuring out what is going on I'd appreciate info here or a pull request.

Chris

[klapligehesten]

Hi Chris, Thank you for the answer. Yes, i have looked at he examples i could find. Including the echo example written by Spritetm. Judged by your answer, it seems no one has fully tested out the 'continuation frame' scenario. I really like the libesphttpd server implementation and the current release is running very stable :-) I think its worth the work, so I will take a look at the RFC 6455 WebSocket Protocol document and the libesphttpd implementation.

I'll get back as soon i have something worked out Cheers - HPSchultz

[PaulFreund]

Maybe we can run the autobahn suite against this implementation to find out where it has shortcomings https://github.com/crossbario/autobahn-testsuite