[QtWebsockets] How to respond to pings sent by the server

razaqq

The websocket standard allows either the client or server to send pings (opcode 0x9) to the other side to which they have to respond with a pong (opcode 0xA).
Qt's websocket client implementation (https://doc.qt.io/qt-5/qwebsocket.html) has a ping() function to send a ping to the server and a pong signal that is emmited when a pong response is received.
However its lacking any sort of way to respond to a ping sent by the server. Without a proper way to repond to server pings its missing one of the fundamental features of websockets.

Am I missing something or is this basic feature really missing?

Christian Ehrlicher

A ping from a server is automatically answered - see https://code.woboq.org/qt5/qtwebsockets/src/websockets/qwebsocket_p.cpp.html#_ZN17QWebSocketPrivate11processPingERK10QByteArray

razaqq

that should be documented somewhere in my opinion

Christian Ehrlicher

Fell free to open a bug report or even better write a patch for it.

aha_1980

Patch pending: https://codereview.qt-project.org/c/qt/qtwebsockets/+/326931

Trigve

@razaqq I'm curious about the problem you're solving that is hard without "proper" ping support in QWebSocket?