73 lines
1.8 KiB
TypeScript
73 lines
1.8 KiB
TypeScript
import type {Request, Response} from 'express';
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import type IRoute from '../net/http/IRoutes';
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import IHealthCheck from './IHealthCheck';
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export default class HealthCheckRoute implements IRoute {
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private readonly _healthCheck: IHealthCheck;
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constructor(healthCheck: IHealthCheck) {
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this._healthCheck = healthCheck;
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}
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public getGETRoutes() {
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console.log('[HealthCheckRoute] getGETRoutes called');
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const routes = {
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'/ok.html': (req, res) => this.externalReadiness.call(this, req, res),
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'/ping': (req, res) => this.ping.call(this, req, res)
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};
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console.log('[HealthCheckRoute] returning routes:', Object.keys(routes));
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return routes;
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}
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public getPOSTRoutes() {
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return {};
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}
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public getPUTRoutes() {
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return {};
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}
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public getPATCHRoutes() {
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return {};
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}
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public getDELETERoutes() {
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return {};
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}
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private externalReadiness(_req: Request, res: Response) {
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console.log('[HealthCheckRoute] External readiness');
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res.setHeader('Cache-Control', 'public, max-age=0, no-cache, no-store');
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try {
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const result = this._healthCheck.checkHealth();
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if (!result || !result.status) {
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return res.status(500).end();
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}
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switch (result.status) {
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case 'ok':
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case 'draining':
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case 'draining2':
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case 'disabled':
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return res.status(200).json(result);
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case 'starting':
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case 'drained':
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case 'stopped':
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return res.status(503).json(result);
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default:
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return res.status(500).json(result);
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}
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} catch {
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return res.status(500).end();
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}
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}
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private ping(_req: Request, res: Response) {
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console.log('[HealthCheckRoute] Ping handler called from [%s]', _req.ip);
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res.status(200).send({status: 'pong'}).end();
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}
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}
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