如何在全局HttpInterceptor中使用Prime NG messageService?

问题描述 投票:0回答:3

我目前正在尝试使用 PrimeNG 9 messageService 和 Angular 8 HttpInterceptor 在我的应用程序中实现全局错误处理程序。我的代码如下:

app.component.html

//....

<p-toast key="notification" position="top-right"></p-toast>

app.module.ts

providers: [ ...
      {
        provide: HTTP_INTERCEPTORS,
        useClass: ErrorInterceptor,
        multi: true,
      },
 ...

错误拦截器.interceptor.ts

import { Injectable, ɵConsole } from '@angular/core';
import { HttpEvent, HttpInterceptor, HttpHandler, HttpRequest, HttpErrorResponse } from '@angular/common/http';
import { Observable, throwError } from 'rxjs';
import { catchError } from 'rxjs/operators';
import { MessageService } from 'primeng/api';
import { Router } from '@angular/router';

@Injectable({
  providedIn: 'root'
})
export class ErrorInterceptor implements HttpInterceptor {

  constructor(
    private messageService: MessageService,
    private router: Router
  ) {}

  public intercept(httpRequest: HttpRequest<any>, next: HttpHandler) : Observable<HttpEvent<any>> {
    if (httpRequest.method !== 'GET')
      return next.handle(httpRequest);
    else {
      return next.handle(httpRequest).pipe(
        catchError( (err: HttpErrorResponse) => {
          console.log(err)
          this.messageService.add({
            key: 'notification',
            severity: 'error',
            summary: 'Woops! There was an error!',
          });
          return throwError(err);
        })
      );
    }

  }

拦截器成功捕获错误并将其打印在控制台中。但是,吐司永远不会显示。我还指出,我在其他组件中使用了 messageService 并且 toast 正确显示,它只是在拦截器中不起作用。

angular primeng angular-http-interceptors
3个回答
0
投票

您已声明并要求在所需位置领取烤面包机吗? 例如。在 x-page.module 中,您需要声明烤面包机/函数/无论在哪里,并在 x-page.ts 中调用它


0
投票

添加到app.module中的“deps”数组

   {
      provide: HTTP_INTERCEPTORS,
      useClass: ErrorInterceptor,
      multi: true,
      deps: [AuthService, MessageService],
    }

0
投票

如果有人仍在 Angular 17 中寻找此功能,只需在 ApplicationConfig 中添加 MessageService

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