Angular :如何拦截服务器发送的事件请求？

import { Injectable } from '@angular/core';
import { HttpInterceptor, HttpRequest, HttpHandler, HttpEvent } from '@angular/common/http';
import { Observable } from 'rxjs';

@Injectable()
export class EventInterceptor implements HttpInterceptor {
  intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    // 在请求头中添加自定义信息
    const modifiedRequest = request.clone({
      setHeaders: {
        'X-Custom-Header': 'Intercepted'
      }
    });

    // 继续处理修改后的请求
    return next.handle(modifiedRequest);
  }
}

import { HTTP_INTERCEPTORS } from '@angular/common/http';
import { EventInterceptor } from './event.interceptor';

@NgModule({
  // ...
  providers: [
    // ...
    {
      provide: HTTP_INTERCEPTORS,
      useClass: EventInterceptor,
      multi: true
    }
  ],
  // ...
})
export class AppModule { }