nxkit/ws/_conv.js

This is a collection of tools, independent of any other libraries

"use strict";
/* ***** BEGIN LICENSE BLOCK *****
 * Distributed under the BSD license:
 *
 * Copyright (c) 2015, xuewen.chu
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of xuewen.chu nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL xuewen.chu BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * ***** END LICENSE BLOCK ***** */
Object.defineProperty(exports, "__esModule", { value: true });
const util_1 = require("../util");
const data_1 = require("./data");
const buffer_1 = require("../buffer");
const event_1 = require("../event");
exports.KEEP_ALIVE_TIME = 5e4; // 50s
class ConversationBasic {
    constructor() {
        this.m_overflow = false;
        this.m_last_packet_time = Date.now();
        this.m_KEEP_ALIVE_TIME = exports.KEEP_ALIVE_TIME;
        this.m_isGzip = false;
        this.m_replyPong = true;
        this.m_handles = {};
        this.m_services_count = 0;
        this.m_token = '';
        this.m_isOpen = false;
        this.m_default_service = '';
        this.onClose = new event_1.EventNoticer('Close', this);
        this.onOpen = new event_1.EventNoticer('Open', this);
        this.onPing = new event_1.EventNoticer('Ping', this);
        this.onPong = new event_1.EventNoticer('Pong', this);
        this.onDrain = new event_1.EventNoticer('Drain', this);
        this.onOverflow = new event_1.EventNoticer('Overflow', this);
    }
    get overflow() {
        return this.m_overflow;
    }
    get lastPacketTime() {
        return this.m_last_packet_time;
    }
    get keepAliveTime() {
        return this.m_KEEP_ALIVE_TIME;
    }
    set keepAliveTime(value) {
        this.m_KEEP_ALIVE_TIME = Math.max(5e3, Number(value) || exports.KEEP_ALIVE_TIME);
    }
    get isGzip() {
        return this.m_isGzip;
    }
    get replyPong() {
        return this.m_replyPong;
    }
    get token() {
        return this.m_token;
    }
    get isOpen() {
        return this.m_isOpen;
    }
    _service(service) {
        return this.m_services_count == 1 ? undefined : service;
    }
    get handles() {
        return { ...this.m_handles };
    }
    /**
     * @fun parse # parser message
     * @arg packet {String|Buffer}
     * @arg {Boolean} isText
     */
    async handlePacket(packet, isText) {
        this.m_last_packet_time = Date.now();
        var data = await data_1.DataBuilder.parse(packet, isText, this.isGzip);
        if (!data)
            return;
        if (!this.isOpen)
            return console.warn('ConversationBasic.handlePacket, connection close status');
        switch (data.type) {
            case data_1.Types.T_BIND:
                this.bindServices([data.service]).catch(console.warn);
                break;
            case data_1.Types.T_PING: // ping Extension protocol 
                this.handlePing(buffer_1.Zero);
                break;
            case data_1.Types.T_PONG: // pong Extension protocol 
                this.handlePong(buffer_1.Zero);
                break;
            default:
                var handle = this.m_handles[data.service || this.m_default_service];
                if (handle) {
                    handle.receiveMessage(data).catch((e) => console.error(e));
                }
                else {
                    console.error('Could not find the message handler, ' +
                        'discarding the message, ' + data.service);
                }
        }
    }
    handlePing(data) {
        this.m_last_packet_time = Date.now();
        if (this.replyPong)
            this.pong().catch(console.error);
        this.onPing.trigger(data);
    }
    handlePong(data) {
        this.m_last_packet_time = Date.now();
        this.onPong.trigger(data);
    }
    async sendFormatData(data) {
        var df = new data_1.DataBuilder(data);
        var bf = await df.builder(this.isGzip);
        await this.send(buffer_1.default.from(bf));
    }
    static write(self, api, args) {
        return util_1.default.promise(function (resolve, reject) {
            var ok = api(...args, function (err) {
                if (err) {
                    reject(Error.new(err));
                }
                else {
                    resolve();
                }
            });
            if (!ok) {
                if (!self.m_overflow) {
                    self.m_overflow = true;
                    self.onOverflow.trigger({});
                }
            }
        });
    }
}
exports.ConversationBasic = ConversationBasic;