import { HttpEvent, HttpRequest, HttpHandler, HttpInterceptor, HttpErrorResponse } from "@angular/common/http"; import { Observable, throwError } from "rxjs"; import { retry, catchError } from "rxjs/operators"; @Injectable() export class HttpsInterceptor implements HttpInterceptor { intercept(req...
根据不同的HTTP状态码,我们可以判断是客户端问题(如404 NotFound或400 BadRequest),还是服务器端问题(如500 InternalServerError),这有助于我们进行针对性的错误处理。 二、错误处理: 错误处理是处理HTTP请求错误的核心环节,Angular提供了多种机制来捕获和处理这些错误。 使用HttpInterceptor拦截错误: 创建HttpInterceptor...
Being able to intercept HTTP requests is crucial in a real world application. Whether it is for error handling and logging or for injecting authentication tokens. While in Angular version 2 it intercepting HTTP requests was totally possible, implementing it wasn't that trivial and intuitive. Starti...
delay: (error, retryCount)=>{ console.log('failed', retryCount);//条件:只可以 retry 3 次,只有 status 503 才 retryif(retryCount <= 3 && errorinstanceofHttpErrorResponse && error.status === 503) {returntimer(1000);//延迟 1 秒后才发出 retry request}else{returnerror;//其它情况不 retry...
HttpErrorResponse, } from '@angular/common/http'; import { Observable } from 'rxjs/Observable'; import 'rxjs/add/operator/do'; @Injectable() export class RequestInterceptor implements HttpInterceptor { constructor() {} intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent...
interceptor. Angular 允许你 customize $http 的error handling。 最后,读者朋友如何跑到我博客首页看一看,你还能看到去年我对 Angular 的吐槽Angular 一个值得当心的bug。是的,我喷的就是 $http ,虽然没有什么卵用。 四:Best Practice 还有一类问题,来自有理想有追求的朋友。他们想知道如何 think in Angular,如何...
Implement custom logic, such as adding headers, logging, or error handling, within the intercept method. Register the interceptor in your app's providers or in a specific HTTP request configuration. Interceptors are powerful for handling cross-cutting concerns like authentication, caching, or error...
这就是如何正确使用异步管道。当您使用异步管道时，您不必订阅，因为它们为您完成了可观察对象的生命周期...
HttpInterceptor提供了一种拦截HTTP请求/响应的方法,就可以在传递它们之前处理。例如,可以在抛出错误之前重试几次HTTP请求。这样,就可以优雅地处理超时,而不必抛出错误。 还可以在抛出错误之前检查错误的状态,使用拦截器,可以检查401状态错误码,将用户重定向到登录页面。
文章遗漏的是如何自动捕获错误。您可以使用HttpInterceptor执行此操作。这是我正在处理的应用程序的示例: http-request-interceptor.ts import { Injectable } from '@angular/core'; import { HttpEvent, HttpHandler, HttpRequest, HttpErrorResponse, HttpInterceptor } from '@angular/common/http'; ...