使用angular2调用REST服务和全局错误捕获的最佳实践

到目前为止,我发现的最佳实践是首先创建全局服务并创建与http相关的方法
那里.即Get,Put,Post,Delete请求等,而不是通过使用这些方法调用您的API服务请求和
使用catch块和显示消息捕获错误,例如： –

Global_Service.ts

import {Injectable} from '@angular/core';
import {Http,Response,RequestOptions,Headers,Request,RequestMethod} from '@angular/http';
import {Observable} from 'rxjs/Rx';
import 'rxjs/Rx';

@Injecable()
export class GlobalService {
    public headers: Headers;
    public requestoptions: RequestOptions;
    public res: Response;

    constructor(public http: Http) { }

    public PostRequest(url: string,data: any): any {

        this.headers = new Headers();
        this.headers.append("Content-type","application/json");
        this.headers.append("Authorization",'Bearer ' + key );

        this.requestoptions = new RequestOptions({
            method: RequestMethod.Post,url: url,headers: this.headers,body: JSON.stringify(data)
        })

        return this.http.request(new Request(this.requestoptions))
            .map((res: Response) => {
                    return [{ status: res.status,json: res }]
            })
            .catch((error: any) => {     //catch Errors here using catch block
                if (error.status === 500) {
                    // Display your message error here
                }
                else if (error.status === 400) {
                    // Display your message error here
                }
            });
    }

    public GetRequest(url: string,data: any): any { ... }

    public PutRequest(url: string,data: any): any { ... }

    public DeleteRequest(url: string,data: any): any { ... }
 }

最好在引导您的应用程序时提供此服务作为依赖项,如下所示： –

bootstrap (APP,[GlobalService,.....])

比你想要调用请求的那个使用这些globalservice方法调用请求,如：

demo.ts

export class Demo {
     ...
    constructor(public GlobalService: GlobalService) { }

    getMethodFunction(){
       this.GlobalService.PostRequest(url,data)
        .subscribe(res => {console.log(res),err => {console.log(err)}
             });
    }

也可以看看

> catch is not working for http.get Angular2.

希望这可以帮到你.