@freemework/hosting
Version:
Hosting library of the Freemework Project.
58 lines • 2.31 kB
JavaScript
import { FException, FCancellationException, FExceptionAggregate } from "@freemework/common";
export class FHttpRequestCancellationToken {
_onClientDisconnectBound;
_cancelListeners = [];
_request;
_isCancellationRequested;
constructor(request) {
this._isCancellationRequested = false;
this._onClientDisconnectBound = this._onClientDisconnect.bind(this);
this._request = request;
// According to https://nodejs.org/api/http.html
// v16.0.0 The close event is now emitted when the request has been completed and not when the underlying socket is closed.
//
// So We switch to listen "close" event on underlying socket
this._request.socket.on("close", this._onClientDisconnectBound);
// this._request.on("end", this._onClientDisconnectBound);
}
get isCancellationRequested() { return this._isCancellationRequested; }
addCancelListener(cb) {
this._cancelListeners.push(cb);
}
removeCancelListener(cb) {
const cbIndex = this._cancelListeners.indexOf(cb);
if (cbIndex !== -1) {
this._cancelListeners.splice(cbIndex, 1);
}
}
throwIfCancellationRequested() {
if (this.isCancellationRequested) {
throw new FCancellationException();
}
}
_onClientDisconnect() {
this._request.socket.removeListener("close", this._onClientDisconnectBound);
// this._request.removeListener("end", this._onClientDisconnectBound);
this._isCancellationRequested = true;
let errors = null;
if (this._cancelListeners.length > 0) {
// Release callback. We do not need its anymore
const cancelListeners = this._cancelListeners.splice(0);
for (const cancelListener of cancelListeners) {
try {
cancelListener();
}
catch (e) {
if (errors === null) {
errors = [];
}
errors.push(FException.wrapIfNeeded(e));
}
}
}
if (errors !== null && errors.length > 0) {
throw new FExceptionAggregate(errors);
}
}
}
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