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middleware.ts
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middleware.ts
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/*
* SonarQube JavaScript Plugin
* Copyright (C) 2011-2024 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
import express from 'express';
import Timeout from './timeout';
/**
* Express.js middleware that timeouts after a lapse of time and triggers a function.
* @param f the timeout function
* @param delay the timeout delay
* @returns the timeout middleware with capability to stop the internal timeout
*/
export function timeoutMiddleware(f: () => void, delay: number) {
const timeout = new Timeout(f, delay);
timeout.start();
let cancelled = false;
return {
middleware(_request: express.Request, response: express.Response, next: express.NextFunction) {
if (!cancelled) {
timeout.stop();
response.on('finish', function () {
timeout.start();
});
}
next();
},
cancel() {
cancelled = true;
timeout.stop();
},
};
}