mirror of
https://github.com/louislam/uptime-kuma.git
synced 2024-12-20 21:24:44 -05:00
412 lines
13 KiB
JavaScript
412 lines
13 KiB
JavaScript
const https = require("https");
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const dayjs = require("dayjs");
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const utc = require("dayjs/plugin/utc")
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let timezone = require("dayjs/plugin/timezone")
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dayjs.extend(utc)
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dayjs.extend(timezone)
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const axios = require("axios");
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const { Prometheus } = require("../prometheus");
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const { debug, UP, DOWN, PENDING, flipStatus } = require("../../src/util");
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const { tcping, ping, checkCertificate, checkStatusCode } = require("../util-server");
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const { R } = require("redbean-node");
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const { BeanModel } = require("redbean-node/dist/bean-model");
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const { Notification } = require("../notification")
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const version = require("../../package.json").version;
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/**
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* status:
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* 0 = DOWN
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* 1 = UP
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* 2 = PENDING
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*/
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class Monitor extends BeanModel {
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async toJSON() {
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let notificationIDList = {};
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let list = await R.find("monitor_notification", " monitor_id = ? ", [
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this.id,
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])
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for (let bean of list) {
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notificationIDList[bean.notification_id] = true;
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}
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return {
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id: this.id,
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name: this.name,
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url: this.url,
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hostname: this.hostname,
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port: this.port,
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maxretries: this.maxretries,
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weight: this.weight,
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active: this.active,
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type: this.type,
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interval: this.interval,
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keyword: this.keyword,
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ignoreTls: this.getIgnoreTls(),
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upsideDown: this.isUpsideDown(),
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maxredirects: this.maxredirects,
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accepted_statuscodes: this.getAcceptedStatuscodes(),
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notificationIDList,
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};
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}
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/**
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* Parse to boolean
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* @returns {boolean}
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*/
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getIgnoreTls() {
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return Boolean(this.ignoreTls)
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}
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/**
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* Parse to boolean
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* @returns {boolean}
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*/
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isUpsideDown() {
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return Boolean(this.upsideDown);
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}
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getAcceptedStatuscodes() {
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return JSON.parse(this.accepted_statuscodes_json);
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}
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start(io) {
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let previousBeat = null;
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let retries = 0;
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let prometheus = new Prometheus(this);
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const beat = async () => {
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// Expose here for prometheus update
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// undefined if not https
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let tlsInfo = undefined;
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if (! previousBeat) {
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previousBeat = await R.findOne("heartbeat", " monitor_id = ? ORDER BY time DESC", [
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this.id,
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])
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}
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const isFirstBeat = !previousBeat;
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let bean = R.dispense("heartbeat")
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bean.monitor_id = this.id;
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bean.time = R.isoDateTime(dayjs.utc());
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bean.status = DOWN;
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if (this.isUpsideDown()) {
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bean.status = flipStatus(bean.status);
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}
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// Duration
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if (! isFirstBeat) {
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bean.duration = dayjs(bean.time).diff(dayjs(previousBeat.time), "second");
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} else {
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bean.duration = 0;
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}
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try {
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if (this.type === "http" || this.type === "keyword") {
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let startTime = dayjs().valueOf();
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// Use Custom agent to disable session reuse
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// https://github.com/nodejs/node/issues/3940
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let res = await axios.get(this.url, {
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timeout: this.interval * 1000 * 0.8,
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headers: {
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"Accept": "*/*",
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"User-Agent": "Uptime-Kuma/" + version,
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},
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httpsAgent: new https.Agent({
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maxCachedSessions: 0,
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rejectUnauthorized: ! this.getIgnoreTls(),
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}),
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maxRedirects: this.maxredirects,
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validateStatus: (status) => {
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return checkStatusCode(status, this.getAcceptedStatuscodes());
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},
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});
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bean.msg = `${res.status} - ${res.statusText}`
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bean.ping = dayjs().valueOf() - startTime;
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// Check certificate if https is used
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let certInfoStartTime = dayjs().valueOf();
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if (this.getUrl()?.protocol === "https:") {
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try {
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tlsInfo = await this.updateTlsInfo(checkCertificate(res));
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} catch (e) {
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if (e.message !== "No TLS certificate in response") {
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console.error(e.message)
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}
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}
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}
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debug("Cert Info Query Time: " + (dayjs().valueOf() - certInfoStartTime) + "ms")
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if (this.type === "http") {
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bean.status = UP;
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} else {
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let data = res.data;
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// Convert to string for object/array
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if (typeof data !== "string") {
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data = JSON.stringify(data)
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}
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if (data.includes(this.keyword)) {
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bean.msg += ", keyword is found"
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bean.status = UP;
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} else {
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throw new Error(bean.msg + ", but keyword is not found")
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}
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}
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} else if (this.type === "port") {
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bean.ping = await tcping(this.hostname, this.port);
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bean.msg = ""
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bean.status = UP;
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} else if (this.type === "ping") {
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bean.ping = await ping(this.hostname);
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bean.msg = ""
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bean.status = UP;
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}
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if (this.isUpsideDown()) {
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bean.status = flipStatus(bean.status);
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if (bean.status === DOWN) {
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throw new Error("Flip UP to DOWN");
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}
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}
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retries = 0;
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} catch (error) {
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bean.msg = error.message;
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// If UP come in here, it must be upside down mode
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// Just reset the retries
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if (this.isUpsideDown() && bean.status === UP) {
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retries = 0;
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} else if ((this.maxretries > 0) && (retries < this.maxretries)) {
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retries++;
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bean.status = PENDING;
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}
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}
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// * ? -> ANY STATUS = important [isFirstBeat]
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// UP -> PENDING = not important
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// * UP -> DOWN = important
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// UP -> UP = not important
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// PENDING -> PENDING = not important
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// * PENDING -> DOWN = important
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// PENDING -> UP = not important
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// DOWN -> PENDING = this case not exists
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// DOWN -> DOWN = not important
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// * DOWN -> UP = important
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let isImportant = isFirstBeat ||
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(previousBeat.status === UP && bean.status === DOWN) ||
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(previousBeat.status === DOWN && bean.status === UP) ||
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(previousBeat.status === PENDING && bean.status === DOWN);
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// Mark as important if status changed, ignore pending pings,
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// Don't notify if disrupted changes to up
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if (isImportant) {
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bean.important = true;
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// Send only if the first beat is DOWN
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if (!isFirstBeat || bean.status === DOWN) {
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let notificationList = await R.getAll("SELECT notification.* FROM notification, monitor_notification WHERE monitor_id = ? AND monitor_notification.notification_id = notification.id ", [
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this.id,
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])
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let text;
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if (bean.status === UP) {
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text = "✅ Up"
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} else {
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text = "🔴 Down"
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}
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let msg = `[${this.name}] [${text}] ${bean.msg}`;
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for (let notification of notificationList) {
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try {
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await Notification.send(JSON.parse(notification.config), msg, await this.toJSON(), bean.toJSON())
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} catch (e) {
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console.error("Cannot send notification to " + notification.name)
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}
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}
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}
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} else {
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bean.important = false;
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}
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if (bean.status === UP) {
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console.info(`Monitor #${this.id} '${this.name}': Successful Response: ${bean.ping} ms | Interval: ${this.interval} seconds | Type: ${this.type}`)
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} else if (bean.status === PENDING) {
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console.warn(`Monitor #${this.id} '${this.name}': Pending: ${bean.msg} | Max retries: ${this.maxretries} | Type: ${this.type}`)
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} else {
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console.warn(`Monitor #${this.id} '${this.name}': Failing: ${bean.msg} | Type: ${this.type}`)
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}
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prometheus.update(bean, tlsInfo)
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io.to(this.user_id).emit("heartbeat", bean.toJSON());
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await R.store(bean)
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Monitor.sendStats(io, this.id, this.user_id)
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previousBeat = bean;
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}
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beat();
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this.heartbeatInterval = setInterval(beat, this.interval * 1000);
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}
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stop() {
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clearInterval(this.heartbeatInterval)
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}
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/**
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* Helper Method:
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* returns URL object for further usage
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* returns null if url is invalid
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* @returns {null|URL}
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*/
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getUrl() {
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try {
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return new URL(this.url);
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} catch (_) {
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return null;
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}
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}
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/**
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* Store TLS info to database
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* @param checkCertificateResult
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* @returns {Promise<object>}
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*/
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async updateTlsInfo(checkCertificateResult) {
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let tls_info_bean = await R.findOne("monitor_tls_info", "monitor_id = ?", [
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this.id,
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]);
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if (tls_info_bean == null) {
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tls_info_bean = R.dispense("monitor_tls_info");
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tls_info_bean.monitor_id = this.id;
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}
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tls_info_bean.info_json = JSON.stringify(checkCertificateResult);
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await R.store(tls_info_bean);
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return checkCertificateResult;
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}
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static async sendStats(io, monitorID, userID) {
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Monitor.sendAvgPing(24, io, monitorID, userID);
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Monitor.sendUptime(24, io, monitorID, userID);
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Monitor.sendUptime(24 * 30, io, monitorID, userID);
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Monitor.sendCertInfo(io, monitorID, userID);
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}
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/**
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*
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* @param duration : int Hours
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*/
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static async sendAvgPing(duration, io, monitorID, userID) {
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let avgPing = parseInt(await R.getCell(`
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SELECT AVG(ping)
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FROM heartbeat
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WHERE time > DATETIME('now', ? || ' hours')
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AND ping IS NOT NULL
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AND monitor_id = ? `, [
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-duration,
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monitorID,
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]));
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io.to(userID).emit("avgPing", monitorID, avgPing);
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}
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static async sendCertInfo(io, monitorID, userID) {
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let tls_info = await R.findOne("monitor_tls_info", "monitor_id = ?", [
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monitorID,
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]);
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if (tls_info != null) {
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io.to(userID).emit("certInfo", monitorID, tls_info.info_json);
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}
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}
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/**
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* Uptime with calculation
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* Calculation based on:
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* https://www.uptrends.com/support/kb/reporting/calculation-of-uptime-and-downtime
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* @param duration : int Hours
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*/
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static async sendUptime(duration, io, monitorID, userID) {
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let sec = duration * 3600;
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let heartbeatList = await R.getAll(`
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SELECT duration, time, status
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FROM heartbeat
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WHERE time > DATETIME('now', ? || ' hours')
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AND monitor_id = ? `, [
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-duration,
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monitorID,
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]);
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let downtime = 0;
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let total = 0;
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let uptime;
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// Special handle for the first heartbeat only
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if (heartbeatList.length === 1) {
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if (heartbeatList[0].status === 1) {
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uptime = 1;
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} else {
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uptime = 0;
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}
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} else {
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for (let row of heartbeatList) {
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let value = parseInt(row.duration)
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let time = row.time
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// Handle if heartbeat duration longer than the target duration
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// e.g. Heartbeat duration = 28hrs, but target duration = 24hrs
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if (value > sec) {
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let trim = dayjs.utc().diff(dayjs(time), "second");
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value = sec - trim;
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if (value < 0) {
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value = 0;
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}
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}
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total += value;
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if (row.status === 0 || row.status === 2) {
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downtime += value;
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}
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}
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uptime = (total - downtime) / total;
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if (uptime < 0) {
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uptime = 0;
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}
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}
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io.to(userID).emit("uptime", monitorID, duration, uptime);
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}
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}
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module.exports = Monitor;
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