A simple, universal public Statuspage. https://status.sp-codes.de
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import {json, Router} from 'express';
import {CurrentStatus, State, UptimeStatus} from './app/_data/data';
import {existsSync, readFileSync, writeFileSync} from 'fs';
import {join} from 'path';
import {JSONPath} from 'jsonpath-plus';
import * as dayjs from 'dayjs';
import {Dayjs} from 'dayjs';
import * as utc from 'dayjs/plugin/utc';
import * as isBetween from 'dayjs/plugin/isBetween';
import {CronJob} from 'cron';
dayjs.extend(utc);
dayjs.extend(isBetween);
interface Cache {
[id: string]: State;
}
interface Config {
authToken: string;
title: string;
description: string;
translations?: {
[lang: string]: {
title: string;
description: string;
}
},
servicesPath?: string;
idPath?: string;
statePath?: string;
stateValues: {
operational: string[];
maintenance: string[];
};
groups: {
id: string;
name: string;
url?: string;
services: {
id: string;
name: string;
url?: string;
statePath?: string;
}[];
}[];
}
const api = Router();
api.use(json());
const serviceStates = existsSync(join(process.cwd(), 'cache.json')) ? JSON.parse(readFileSync(join(process.cwd(), 'cache.json'), {encoding: 'utf-8'})) : {} as Cache;
const config = JSON.parse(readFileSync(join(process.cwd(), 'config.json'), {encoding: 'utf-8'})) as Config;
const serviceStatePaths: { [service: string]: string } = config.groups
.map(g => g.services).reduce((x, y) => x.concat(y), [])
.filter(s => s.statePath)
.reduce((services, service) => {
services[service.id] = service.statePath;
return services;
}, {});
let cache: CurrentStatus;
let uptimeStates = existsSync(join(process.cwd(), 'uptime.json')) ? JSON.parse(readFileSync(join(process.cwd(), 'uptime.json'), {encoding: 'utf-8'})) : {} as { [id: string]: UptimeStatus; };
// init serviceStates and uptimeStates
config.groups
.map(g => g.services).reduce((x, y) => x.concat(y), [])
.map(s => s.id).filter(id => !serviceStates[id])
.forEach(id => serviceStates[id] = 'operational');
for (let id in serviceStates) {
if (serviceStates.hasOwnProperty(id)) {
updateServiceState(id, serviceStates[id]);
}
}
updateCache();
api.post('/update/health', (req, res) => {
const token = req.query.token;
if (token !== config.authToken) {
return res.status(401).send('invalid token');
}
const serviceId = req.query.service as string;
let services: { id: string, state: string }[] = [];
if (serviceId) {
services = [{id: serviceId, state: JSONPath({path: serviceStatePaths[serviceId], json: req.body, wrap: false})}];
} else if (config.servicesPath && config.idPath && config.statePath) {
services = JSONPath({path: config.servicesPath, json: req.body})
.map(s => ({
id: JSONPath({path: config.idPath, json: s, wrap: false}),
state: JSONPath({path: config.statePath, json: s, wrap: false})
}));
}
services.forEach(s => {
if (config.stateValues.operational.includes(s.state)) {
updateServiceState(s.id, 'operational');
} else if (config.stateValues.maintenance.includes(s.state)) {
updateServiceState(s.id, 'maintenance');
} else {
updateServiceState(s.id, 'outage');
}
});
updateCache();
persistCache();
return res.send('OK');
});
api.get('/status', (req, res) => {
return res.json(cache);
});
api.get('/uptime', (req, res) => {
const serviceId = req.query.service as string;
const uptime = uptimeStates[serviceId];
if (uptime) {
return res.json(uptime);
}
return res.sendStatus(404);
});
api.get('/badge', (req, res) => {
const serviceId = req.query.service as string;
if (!serviceId) {
return res.json({
'schemaVersion': 1,
'label': 'sp-status',
'message': 'service not provided',
'isError': true
});
}
const service = cache.groups
.map(g => g.services).reduce((x, y) => x.concat(y), [])
.find(s => s.id === serviceId);
if (!service) {
return res.json({
'schemaVersion': 1,
'label': 'sp-status',
'message': 'service not found',
'isError': true
});
}
const label = req.query.label || service.name;
let message;
let color;
switch (service.state) {
case 'operational':
message = req.query.operational || service.state;
color = '#7ed321';
break;
case 'outage':
message = req.query.outage || service.state;
color = '#ff6f6f';
break;
case 'maintenance':
message = req.query.maintenance || service.state;
color = '#f7ca18';
break;
}
return res.json({
'schemaVersion': 1,
'label': label,
'message': message,
'color': color
});
});
api.get('/info', (req, res) => {
return res.json({
title: config.title,
description: config.description,
translations: config.translations
});
});
function updateServiceState(id: string, state: string) {
if (!uptimeStates[id]) {
uptimeStates[id] = {days: [], events: []};
}
if (serviceStates[id] === state) {
return;
}
serviceStates[id] = state;
if (uptimeStates[id].events.length === 0 && state !== 'operational' ||
uptimeStates[id].events.length > 0 && uptimeStates[id].events[0].state !== state) {
uptimeStates[id].events.unshift({state: state, date: new Date()});
console.log(`${id} changed to ${state}`);
}
}
function updateCache(): void {
updateUptime();
const groups = config.groups.map(group => {
const services = group.services.map(service => {
const uptime = uptimeStates[service.id];
return {
id: service.id,
name: service.name,
url: service.url,
state: serviceStates[service.id] || 'operational',
uptime: uptime ? uptime.days30 : 100
};
});
return {
id: group.id,
name: group.name,
url: group.url,
state: calculateOverallState(services.map(s => s.state)),
services: services
};
});
cache = {
state: calculateOverallState(groups.map(g => g.state)),
groups: groups
};
}
function updateUptime() {
const now = dayjs.utc();
const today = now.startOf('d');
const eventLimit = now.subtract(7, 'd');
for (const id in uptimeStates) {
if (uptimeStates.hasOwnProperty(id)) {
const uptime = uptimeStates[id] as UptimeStatus;
if (uptime.days.length < 90) {
for (let i = 0; i < 90; i++) {
uptime.days.push({date: today.subtract(90 - i, 'd').toDate(), uptime: 100});
}
}
if (today.diff(dayjs.utc(uptime.days[uptime.days.length - 1].date), 'd') >= 1) {
uptime.days.push({date: today.toDate(), uptime: 0});
}
if (uptime.days.length > 90) {
uptime.days.splice(0, uptime.days.length - 90);
}
for (let i = uptime.days.length - 3; i < uptime.days.length; i++) {
const start = dayjs.utc(uptime.days[i].date);
let end = start.add(1, 'd');
if (end.isAfter(now)) {
end = now;
}
uptime.days[i].uptime = calculateUptime(start, end, uptime.events);
}
uptime.hours24 = calculateUptime(now.subtract(24, 'h'), now, uptime.events);
uptime.days7 = uptime.days.slice(uptime.days.length - 7, uptime.days.length).map(e => e.uptime).reduce((a, b) => a + b) / 7;
uptime.days30 = uptime.days.slice(uptime.days.length - 30, uptime.days.length).map(e => e.uptime).reduce((a, b) => a + b) / 30;
uptime.days90 = uptime.days.slice(uptime.days.length - 90, uptime.days.length).map(e => e.uptime).reduce((a, b) => a + b) / 90;
uptime.events = uptime.events.filter(e => dayjs.utc(e.date).isAfter(eventLimit));
if (uptime.events.length > 0 && uptime.events[uptime.events.length - 1].state === 'operational') {
uptime.events.pop();
}
}
}
}
function calculateUptime(start: Dayjs, end: Dayjs, events: { state: State; date: Date; }[]): number {
if (events.filter(event => dayjs.utc(event.date).isBetween(start, end)).length == 0) {
const lastEvent = events.filter(event => dayjs.utc(event.date).isBefore(start))[0];
if (lastEvent && lastEvent.state !== 'operational') {
return 0;
}
return 100;
}
let uptimeMillis = 0;
let newestEventDate;
for (let i = events.length - 1; i >= 0; i--) {
const event = events[i];
const eventDate = dayjs.utc(event.date);
const lastEvent = events[i + 1];
let lastEventDate = lastEvent ? dayjs.utc(lastEvent.date) : start;
if (lastEventDate.isBefore(start)) {
lastEventDate = start;
}
if (eventDate.isBetween(start, end)) {
if (event.state === 'operational') {
newestEventDate = eventDate;
} else if (!lastEvent || lastEvent.state === 'operational') {
newestEventDate = null;
uptimeMillis += eventDate.diff(lastEventDate, 'ms');
}
}
}
if (newestEventDate) {
uptimeMillis += end.diff(newestEventDate, 'ms');
}
return uptimeMillis / end.diff(start, 'ms') * 100;
}
function calculateOverallState(states: State[]): State {
return states.includes('outage') ? 'outage' : states.includes('maintenance') ? 'maintenance' : 'operational';
}
function persistCache() {
writeFileSync('cache.json', JSON.stringify(serviceStates), {encoding: 'utf-8'});
writeFileSync('uptime.json', JSON.stringify(uptimeStates), {encoding: 'utf-8'});
}
new CronJob('0 * * * * *', () => updateCache(), null, true, 'UTC').start();
new CronJob('0 0 * * * *', () => persistCache(), null, true, 'UTC').start();
export {api};