routeros-api
Version:
Mikrotik Routerboard RouterOS API for NodeJS
278 lines • 16.9 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.RStream = void 0;
const events_1 = require("events");
const Channel_1 = require("./Channel");
const RosException_1 = require("./RosException");
const timers_1 = require("timers");
const utils_1 = require("./utils");
/**
* Stream class is responsible for handling
* continuous data from some parts of the
* routeros, like /ip/address/listen or
* /tool/torch which keeps sending data endlessly.
* It is also possible to pause/resume/stop generated
* streams.
*/
class RStream extends events_1.EventEmitter {
/**
* Constructor, it also starts the streaming after construction
*
* @param {Channel} channel
* @param {Array} params
* @param {function} callback
*/
constructor(channel, params, callback) {
super();
/** Flag for turning on empty data debouncing */
this.shouldDebounceEmptyData = false;
/**
* If is streaming flag
*/
this.streaming = true;
/**
* If is pausing flag
*/
this.pausing = false;
/**
* If is paused flag
*/
this.paused = false;
/**
* If is stopping flag
*/
this.stopping = false;
/**
* If is stopped flag
*/
this.stopped = false;
/**
* If got a trap error
*/
this.trapped = false;
/**
* Save the current section of the packet, if has any
*/
this.currentSection = null;
this.forcelyStop = false;
/**
* Store the current section in a single
* array before sending when another section comes
*/
this.currentSectionPacket = [];
this.channel = channel;
this.params = params;
this.callback = callback;
}
/**
* Function to receive the callback which
* will receive data, if not provided over the
* constructor or changed later after the streaming
* have started.
*
* @param {function} callback
*/
data(callback) {
this.callback = callback;
}
/**
* Resume the paused stream, using the same channel
*
* @returns {Promise}
*/
resume() {
if (this.stopped || this.stopping)
return Promise.reject(new RosException_1.RosException('STREAMCLOSD'));
if (!this.streaming) {
this.pausing = false;
this.start();
this.streaming = true;
}
return Promise.resolve();
}
/**
* Pause the stream, but don't destroy the channel
*
* @returns {Promise}
*/
pause() {
if (this.stopped || this.stopping)
return Promise.reject(new RosException_1.RosException('STREAMCLOSD'));
if (this.pausing || this.paused)
return Promise.resolve();
if (this.streaming) {
this.pausing = true;
return this.stop(true)
.then(() => {
this.pausing = false;
this.paused = true;
return Promise.resolve();
})
.catch((err) => {
return Promise.reject(err);
});
}
return Promise.resolve();
}
/**
* Stop the stream entirely, can't re-stream after
* this if called directly.
*
* @returns {Promise}
*/
stop(pausing = false) {
if (this.stopped || this.stopping)
return Promise.resolve();
if (!pausing)
this.forcelyStop = true;
if (this.paused) {
this.streaming = false;
this.stopping = false;
this.stopped = true;
if (this.channel)
this.channel.close(true);
return Promise.resolve();
}
if (!this.pausing)
this.stopping = true;
let chann = new Channel_1.Channel(this.channel.Connector);
chann.on('close', () => {
chann = null;
});
if (this.debounceSendingEmptyData)
this.debounceSendingEmptyData.cancel();
return chann
.write(['/cancel', '=tag=' + this.channel.Id])
.then(() => {
this.streaming = false;
if (!this.pausing) {
this.stopping = false;
this.stopped = true;
}
this.emit('stopped');
return Promise.resolve();
})
.catch((err) => {
return Promise.reject(err);
});
}
/**
* Alias for stop()
*/
close() {
return this.stop();
}
/**
* Write over the connection and start the stream
*/
start() {
if (!this.stopped && !this.stopping) {
this.channel.on('close', () => {
if (this.forcelyStop || (!this.pausing && !this.paused)) {
if (!this.trapped)
this.emit('done');
this.emit('close');
}
this.stopped = false;
});
this.channel.on('stream', (packet) => {
if (this.debounceSendingEmptyData)
this.debounceSendingEmptyData.run();
this.onStream(packet);
});
this.channel.once('trap', this.onTrap.bind(this));
this.channel.once('done', this.onDone.bind(this));
this.channel.write(this.params.slice(), true, false);
this.emit('started');
if (this.shouldDebounceEmptyData)
this.prepareDebounceEmptyData();
}
}
prepareDebounceEmptyData() {
this.shouldDebounceEmptyData = true;
const intervalParam = this.params.find((param) => {
return /=interval=/.test(param);
});
let interval = 2000;
if (intervalParam) {
const val = intervalParam.split('=')[2];
interval = parseInt(val, null) * 1000;
}
this.debounceSendingEmptyData = utils_1.debounce(() => {
if (!this.stopped ||
!this.stopping ||
!this.paused ||
!this.pausing) {
this.onStream([]);
this.debounceSendingEmptyData.run();
}
}, interval + 300);
}
/**
* When receiving the stream packet, give it to
* the callback
*
* @returns {function}
*/
onStream(packet) {
this.emit('data', packet);
if (this.callback) {
if (packet['.section']) {
timers_1.clearTimeout(this.sectionPacketSendingTimeout);
const sendData = () => {
this.callback(null, this.currentSectionPacket.slice(), this);
this.currentSectionPacket = [];
};
this.sectionPacketSendingTimeout = timers_1.setTimeout(sendData.bind(this), 300);
if (this.currentSectionPacket.length > 0 &&
packet['.section'] !== this.currentSection) {
timers_1.clearTimeout(this.sectionPacketSendingTimeout);
sendData();
}
this.currentSection = packet['.section'];
this.currentSectionPacket.push(packet);
}
else {
this.callback(null, packet, this);
}
}
}
/**
* When receiving a trap over the connection,
* when pausing, will receive a 'interrupted' message,
* this will not be considered as an error but a flag
* for the pause and resume function
*
* @returns {function}
*/
onTrap(data) {
if (data.message === 'interrupted') {
this.streaming = false;
}
else {
this.stopped = true;
this.trapped = true;
if (this.callback) {
this.callback(new Error(data.message), null, this);
}
else {
this.emit('error', data);
}
this.emit('trap', data);
}
}
/**
* When the channel stops sending data.
* It will close the channel if the
* intention was stopping it.
*
* @returns {function}
*/
onDone() {
if (this.stopped && this.channel) {
this.channel.close(true);
}
}
}
exports.RStream = RStream;
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