@fibercom/routeros-api
Version:
Robust MikroTik RouterOS API client for Node.js and TypeScript
303 lines • 24.9 kB
JavaScript
"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.RStream = void 0;
const events_1 = require("events");
const timers_1 = require("timers");
const Channel_1 = require("./Channel");
const RosException_1 = require("./RosException");
const utils_1 = require("./utils");
/**
* Handles continuous RouterOS commands such as `/tool/torch` and listeners.
* A paused stream remains logically open, but receives a fresh tagged channel
* when it is resumed.
*/
class RStream extends events_1.EventEmitter {
constructor(channel, params, callback) {
super();
this.state = "idle";
this.trapped = false;
this.shouldDebounceEmptyData = false;
this.currentSection = null;
this.currentSectionPacket = [];
this.channel = channel;
this.connector = channel.Connector;
this.params = params;
this.callback = callback;
}
data(callback) {
if (this.state === "running") {
console.warn("Replacing callback mid-stream. Use with caution.");
}
this.callback = callback;
}
resume() {
var _a;
if (this.state === "stopped" || this.state === "stopping") {
return Promise.reject(new RosException_1.RosException("STREAMCLOSD"));
}
if (this.state === "pausing") {
return ((_a = this.transition) !== null && _a !== void 0 ? _a : Promise.resolve()).then(() => this.resume());
}
if (this.state !== "paused")
return Promise.resolve();
this.channel = new Channel_1.Channel(this.connector);
this.start();
return Promise.resolve();
}
pause() {
if (this.state === "stopped" || this.state === "stopping") {
return Promise.reject(new RosException_1.RosException("STREAMCLOSD"));
}
if (this.state === "paused" || this.state === "pausing") {
return Promise.resolve();
}
if (this.state !== "running")
return Promise.resolve();
return this.trackTransition(this.cancelActiveChannel(true));
}
stop(pausing = false) {
var _a, _b;
if (pausing)
return this.pause();
if (this.state === "stopped") {
return Promise.resolve();
}
if (this.state === "stopping") {
return (_a = this.transition) !== null && _a !== void 0 ? _a : Promise.resolve();
}
if (this.state === "paused" || this.state === "idle") {
this.finish(false);
return Promise.resolve();
}
if (this.state === "pausing") {
return ((_b = this.transition) !== null && _b !== void 0 ? _b : Promise.resolve()).then(() => this.stop());
}
return this.trackTransition(this.cancelActiveChannel(false));
}
close() {
return this.stop();
}
start() {
if (this.state !== "idle" && this.state !== "paused")
return;
if (!this.channel)
this.channel = new Channel_1.Channel(this.connector);
const activeChannel = this.channel;
this.state = "running";
this.trapped = false;
activeChannel.on("stream", (packet) => {
var _a;
if (this.channel !== activeChannel || this.state !== "running")
return;
(_a = this.debounceSendingEmptyData) === null || _a === void 0 ? void 0 : _a.run();
this.onStream(packet);
});
activeChannel.once("trap", (data) => {
if (this.channel !== activeChannel)
return;
this.onTrap(data);
});
activeChannel.once("done", () => {
if (this.channel !== activeChannel || this.state !== "running")
return;
this.finish(false);
});
activeChannel.once("close", () => {
if (this.channel !== activeChannel)
return;
if (this.state === "running")
this.finish(false, false);
else if (this.state === "stopping") {
this.finish(this.trapped, !this.trapped);
}
});
try {
activeChannel.write(this.params.slice(), true, false);
}
catch (err) {
this.state = "stopped";
this.channel = null;
this.emitError(new Error(`Failed to start stream: ${this.errorMessage(err)}`));
this.emit("stopped");
return;
}
if (this.shouldDebounceEmptyData)
this.prepareDebounceEmptyData();
this.emit("started");
}
prepareDebounceEmptyData() {
var _a;
this.shouldDebounceEmptyData = true;
(_a = this.debounceSendingEmptyData) === null || _a === void 0 ? void 0 : _a.cancel();
const intervalParam = this.params.find((param) => /=interval=/.test(param));
let interval = 2000;
if (intervalParam) {
const parsed = parseInt(intervalParam.split("=")[2], 10);
if (!isNaN(parsed))
interval = parsed * 1000;
}
this.debounceSendingEmptyData = (0, utils_1.debounce)(() => {
var _a;
if (this.state !== "running")
return;
this.onStream([]);
(_a = this.debounceSendingEmptyData) === null || _a === void 0 ? void 0 : _a.run();
}, interval + 300);
if (this.state === "running")
this.debounceSendingEmptyData.run();
}
cancelActiveChannel(pausing) {
const activeChannel = this.channel;
if (!activeChannel) {
if (pausing) {
this.state = "paused";
this.emit("paused");
}
else {
this.finish(false);
}
return Promise.resolve();
}
this.state = pausing ? "pausing" : "stopping";
this.cancelTimers();
const activeChannelClosed = activeChannel.Closed
? Promise.resolve()
: new Promise((resolve) => activeChannel.once("close", resolve));
const cancelChannel = new Channel_1.Channel(this.connector);
return cancelChannel
.write(["/cancel", "=tag=" + activeChannel.Id])
.then(() => __awaiter(this, void 0, void 0, function* () {
// RouterOS can acknowledge /cancel before the cancelled command sends
// its final !trap/!done. Keep its tag registered until that happens so
// in-flight stream packets can be safely consumed and ignored.
yield this.waitForChannelClose(activeChannel, activeChannelClosed);
activeChannel.close(true);
if (this.channel === activeChannel)
this.channel = null;
if (pausing) {
this.state = "paused";
this.emit("paused");
}
else {
this.finish(false);
}
}))
.catch((err) => {
this.state = "running";
this.emitError(new Error(`Cancel failed: ${err.message}`));
return Promise.reject(err);
});
}
waitForChannelClose(channel, channelClosed) {
if (channel.Closed)
return Promise.resolve();
return new Promise((resolve) => {
const timeout = (0, timers_1.setTimeout)(resolve, Math.max(1000, this.connector.timeout * 1000));
channelClosed.then(() => {
(0, timers_1.clearTimeout)(timeout);
resolve();
});
});
}
finish(trapped, emitDone = true) {
if (this.state === "stopped")
return;
const activeChannel = this.channel;
this.state = "stopped";
this.trapped = trapped;
this.channel = null;
this.cancelTimers();
activeChannel === null || activeChannel === void 0 ? void 0 : activeChannel.close(true);
if (emitDone && !trapped)
this.emit("done");
this.emit("close");
this.emit("stopped");
}
cancelTimers() {
var _a;
(_a = this.debounceSendingEmptyData) === null || _a === void 0 ? void 0 : _a.cancel();
if (this.sectionPacketSendingTimeout) {
(0, timers_1.clearTimeout)(this.sectionPacketSendingTimeout);
this.sectionPacketSendingTimeout = undefined;
}
this.currentSection = null;
this.currentSectionPacket = [];
}
onStream(packet) {
this.emit("data", packet);
if (!this.callback)
return;
try {
if (packet[".section"]) {
if (this.sectionPacketSendingTimeout) {
(0, timers_1.clearTimeout)(this.sectionPacketSendingTimeout);
}
const sendData = () => {
var _a;
(_a = this.callback) === null || _a === void 0 ? void 0 : _a.call(this, null, this.currentSectionPacket.slice(), this);
this.currentSectionPacket = [];
};
this.sectionPacketSendingTimeout = (0, timers_1.setTimeout)(sendData, 300);
if (this.currentSectionPacket.length > 0 &&
packet[".section"] !== this.currentSection) {
(0, timers_1.clearTimeout)(this.sectionPacketSendingTimeout);
sendData();
}
this.currentSection = packet[".section"];
this.currentSectionPacket.push(packet);
}
else {
this.callback(null, packet, this);
}
}
catch (err) {
this.emitError(new Error(`Callback processing failed: ${this.errorMessage(err)}`));
}
}
onTrap(data) {
const message = (data === null || data === void 0 ? void 0 : data.message) || "Unknown trap error";
if (message === "interrupted" &&
(this.state === "pausing" || this.state === "stopping")) {
return;
}
if (message === "interrupted") {
this.state = "stopping";
this.cancelTimers();
return;
}
this.trapped = true;
this.state = "stopping";
this.cancelTimers();
if (this.callback)
this.callback(new Error(message), undefined, this);
else
this.emitError(new RosException_1.RosException("TRAP", { message }));
this.emit("trap", data);
}
trackTransition(transition) {
const tracked = transition.finally(() => {
if (this.transition === tracked)
this.transition = undefined;
});
this.transition = tracked;
return tracked;
}
emitError(error) {
if (this.listenerCount("error") > 0)
this.emit("error", error);
}
errorMessage(error) {
return error instanceof Error ? error.message : String(error);
}
}
exports.RStream = RStream;
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