/**
* (c) Copyright Ascensio System SIA 2025
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* @license
*/
/**
* @module
* @mergeModuleWith util/express
*/
import type express from "express"
declare module "express-serve-static-core" {
interface Request {
signal?: AbortSignal
}
}
export function signal(): express.Handler {
return (req, res, next) => {
let ac = new AbortController()
if (req.signal) {
req.signal.addEventListener(
"abort",
() => {
ac.abort()
},
{
once: true,
},
)
}
req.signal = ac.signal
res.once("close", () => {
ac.abort()
})
next()
}
}
