HTTP发布并在Angular 6中获取请求

问题描述

在angular 5.2.x中，对于http get和post我有以下代码:

In angular 5.2.x for http get and post I had this code:

post(url: string, model: any): Observable<boolean> {

return this.http.post(url, model)
  .map(response => response)
  .do(data => console.log(url + ': ' + JSON.stringify(data)))
  .catch(err => this.handleError(err));
 }
 get(url: string): Observable<any> {

return this.http.get(url)
  .map(response => response)
  .do(data =>
    console.log(url + ': ' + JSON.stringify(data))
  )
  .catch((error: any) => Observable.throw(this.handleError(error)));
 }

在角度6中，它不起作用.

In angular 6 it doesn't work.

我们如何发出HTTP帖子或获取请求?

How can we make an HTTP post or get request?

推荐答案

更新:在角度7中，它们与6相同.

Update :In angular 7, they are the same as 6

在角度6中

在实时示例

  /** POST: add a new hero to the database */
  addHero (hero: Hero): Observable<Hero> {
 return this.http.post<Hero>(this.heroesUrl, hero, httpOptions)
  .pipe(
    catchError(this.handleError('addHero', hero))
  );
}
  /** GET heroes from the server */
 getHeroes (): Observable<Hero[]> {
return this.http.get<Hero[]>(this.heroesUrl)
  .pipe(
    catchError(this.handleError('getHeroes', []))
  );
}

这是因为pipeable/lettable operators的缘故，现在角度用户可以使用tree-shakable并删除未使用的导入内容并优化应用程序

it's because of pipeable/lettable operators which now angular is able to use tree-shakable and remove unused imports and optimize the app

某些rxjs函数已更改

some rxjs functions are changed

do -> tap
catch -> catchError
switch -> switchAll
finally -> finalize

更多信息，请参见 MIGRATION

和导入路径

对于JavaScript开发人员，一般规则如下:

For JavaScript developers, the general rule is as follows:

rxjs:创建方法，类型，调度程序和实用程序

rxjs: Creation methods, types, schedulers and utilities

import { Observable, Subject, asapScheduler, pipe, of, from, interval, merge, fromEvent } from 'rxjs';

rxjs/operators:所有可管道运算符:

rxjs/operators: All pipeable operators:

import { map, filter, scan } from 'rxjs/operators';

rxjs/webSocket:Web套接字主题实现

rxjs/webSocket: The web socket subject implementation

import { webSocket } from 'rxjs/webSocket';

rxjs/ajax:Rx ajax实现

rxjs/ajax: The Rx ajax implementation

import { ajax } from 'rxjs/ajax';

rxjs/testing:测试实用程序

rxjs/testing: The testing utilities

import { TestScheduler } from 'rxjs/testing';

为了获得向后兼容性，您可以使用rxjs-compat

and for backward compatability you can use rxjs-compat

这篇关于HTTP发布并在Angular 6中获取请求的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！