处理Angular2中的错误的最佳实践

Question

嗨我正在尝试接收来自catch块(服务)发送的错误.在多个组件中,我需要显示弹出窗口并显示错误消息.请让我知道如何创建一个通用方法并在服务块内调用它.就像我现在用"showErrorPage()"做的那样.

import { Injectable } from '@angular/core';
import { Http, Headers, Response, RequestOptions } from '@angular/http';
import { Observable } from 'rxjs';
import 'rxjs/add/operator/map'

@Injectable()
export class DataService {
    private reqData = {};
    private url: string;
    constructor(private http: Http) {
    }

    getResult(searchObject: {}): Observable<Response> {
        // some logic
        return this.http.post(<my url>, <data to be sent>)

        .map((response: Response) => {
            return response;
        })
        .catch((error: any) => {
            if (error.status === 302 || error.status === "302" ) {
                // do some thing
            }
            else {
              return Observable.throw(new Error(error.status));
            }
        });
    }
}

在我的组件中,我称之为

import { Component,EventEmitter, Output, OnInit, OnDestroy } from '@angular/core';
import { ActivatedRoute, Router } from '@angular/router';
// importing DataService ';

@Component({
  selector: 'o-result',
  templateUrl: './o-result.component.html',
})

export class AComp implements OnInit {
    constructor(
        private dataService: DataService
    ){

    }

    ngOnInit() {
      this.dataService.getResult(<url>, <params>)
      .subscribe(
         response => {
             // doing logic with responce
         }
          ,
          error => {
            this.showErrorPage();
         }
      )

    }

    showErrorPage(): void {
      // displaying error in popup
    }
}

Answer 1

根据角度风格指南

数据管理的细节(例如标头,HTTP方法,缓存,错误处理和重试逻辑)与组件和其他数据使用者无关.

您的实施似乎是正确的.

此外,http客户端文档提供了相同的实现.