rapport/lib/websocket/on.close.js

Request/response wrapper for websockets

'use strict';

/**
 * adds an onClose handler to the socket.
 *
 * @param {object} standardSocket the standardized socket.
 * @param {object} requestCache The request cache to use.
 * @param {object} options Websocket options.
 * @param {function} handler function to execute on close.
 */
module.exports = (standardSocket, requestCache, options, handler) => {
    standardSocket.onClose((code, msg) => {
        let message;

        try {
            message = options.decodeCloseMessage(msg);
        } catch (err) {
            message = msg;
        }

        // Resolve the close if there is one pending
        requestCache.resolve(requestCache.closeKey)

        // Reject all pending requests
        requestCache.rejectAll('Websocket was closed remotely', code, message);

        // Call the close handler
        handler(message, code);
    });
};