@zkp2p/reclaim-witness-sdk
Version:
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42 lines • 2.64 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.addKeepAlive = addKeepAlive;
const config_1 = require("../../config");
/**
* Adds a keep-alive mechanism to the WebSocket
* client
*/
function addKeepAlive(ws, logger) {
let sendTimeout;
let killTimeout;
ws.on('message', () => {
logger.trace('data recv, resetting timer');
resetTimer();
});
ws.on('pong', () => {
logger.trace('pong received, resetting timer');
resetTimer();
});
ws.on('error', cleanup);
ws.on('close', cleanup);
function resetTimer() {
cleanup();
resetSendTimeout();
killTimeout = setTimeout(() => {
logger.warn('no data received in a while, closing connection');
ws.close();
}, config_1.MAX_NO_DATA_INTERVAL_MS);
}
function resetSendTimeout() {
// reset ping
sendTimeout = setTimeout(() => {
ws.ping();
resetSendTimeout();
}, config_1.PING_INTERVAL_MS);
}
function cleanup() {
clearTimeout(killTimeout);
clearTimeout(sendTimeout);
}
}
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