node.js - 从 Angular 5 迁移到 Angular 7

Question

昨天我已经将我的应用程序从 Angular 5 迁移到 Angular 7。在那个过程中，我在运行应用程序时按照建议将 EventSource 更改为 EventSourcePolyfill。但从那以后我面临一个奇怪的问题。这就是我在控制台中遇到的问题，如下所示:

ERROR TypeError: Cannot read property 'heartbeatTimeout' of undefined
    at new EventSourcePolyfill (eventsource.js:155)
    at AppFooterComponent.push../src/app/layout/footer/footer.component.ts.AppFooterComponent.connect (footer.component.ts:133)
    at SafeSubscriber._next (footer.component.ts:52)
    at SafeSubscriber.push../node_modules/rxjs/_esm5/internal/Subscriber.js.SafeSubscriber.__tryOrUnsub (Subscriber.js:196)
    at SafeSubscriber.push../node_modules/rxjs/_esm5/internal/Subscriber.js.SafeSubscriber.next (Subscriber.js:134)
    at Subscriber.push../node_modules/rxjs/_esm5/internal/Subscriber.js.Subscriber._next (Subscriber.js:77)
    at Subscriber.push../node_modules/rxjs/_esm5/internal/Subscriber.js.Subscriber.next (Subscriber.js:54)
    at AsyncAction.dispatch (timer.js:31)
    at AsyncAction.push../node_modules/rxjs/_esm5/internal/scheduler/AsyncAction.js.AsyncAction._execute (AsyncAction.js:63)
    at AsyncAction.push../node_modules/rxjs/_esm5/internal/scheduler/AsyncAction.js.AsyncAction.execute (AsyncAction.js:51)

这是我在代码中所做的:

import { EventSourcePolyfill } from 'ng-event-source';

let source = new EventSourcePolyfill('/api/v1/events/register');

谁能建议我如何解决这个问题。

谢谢。

Answer 1

你必须传递额外的参数，如

eventSource = new EventSourcePolyfill(url,
    { heartbeatTimeout: 5000, connectionTimeout: 5000, headers: { 'Authorization': 'Basic foo' }});