8000 fix(common): prevent reading chunks if app is destroyed by arturovt · Pull Request #61354 · angular/angular · GitHub
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fix(common): prevent reading chunks if app is destroyed #61354

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fix(common): prevent reading chunks if app is destroyed #61354

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11 changes: 10 additions & 1 deletion packages/common/http/src/fetch.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,7 @@
* found in the LICENSE file at https://angular.dev/license
*/

import {inject, Injectable, InjectionToken, NgZone} from '@angular/core';
import {ApplicationRef, inject, Injectable, InjectionToken, NgZone} from '@angular/core';
import {Observable, Observer} from 'rxjs';

import {HttpBackend} from './backend';
Expand Down Expand Up @@ -70,6 +70,7 @@ export class FetchBackend implements HttpBackend {
private readonly fetchImpl =
inject(FetchFactory, {optional: true})?.fetch ?? ((...args) => globalThis.fetch(...args));
private readonly ngZone = inject(NgZone);
private readonly appRef = inject(ApplicationRef);

handle(request: HttpRequest<any>): Observable<HttpEvent<any>> {
return new Observable((observer) => {
Expand Down Expand Up @@ -148,6 +149,14 @@ export class FetchBackend implements HttpBackend {
// Here calling the async ReadableStreamDefaultReader.read() is responsible for triggering CD
await this.ngZone.runOutsideAngular(async () => {
while (true) {
// Prevent reading chunks if the app is destroyed. Otherwise, we risk doing
// unnecessary work or triggering side effects after teardown.
// This may happen if the app was explicitly destroyed before
// the response returned entirely.
if (this.appRef.destroyed) {
break;
}

const {done, value} = await reader.read();

if (done) {
Expand Down
0