A brief discussion on the usage of http request module in Angular

This article will introduce to you the use of http request module in Angular. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to everyone.

Related recommendations: "angular tutorial"

First module introduction

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';

import {FormsModule} from '@angular/forms';
import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import {HttpClientModule,HttpClientJsonpModule} from '@angular/common/http'

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    AppRoutingModule,
    FormsModule,
    HttpClientModule,
    HttpClientJsonpModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

Used in components

import { Component, OnInit } from '@angular/core';
import { HttpClient, HttpHeaders, HttpParams } from '@angular/common/http';
import Qs from 'qs';
@Component({
  selector: 'app-http',
  templateUrl: './http.component.html',
  styleUrls: ['./http.component.less']
})
export class HttpComponent implements OnInit {

  constructor(public http: HttpClient) { }

  ngOnInit(): void {

    this.getPostData(); //post
    this.getTestData();  //get
    this.getJsonpData()  //jsonp
  }

  getPostData() {
    this.http.post('http://localhost:3000/api/info', {
      name: 'laney'
    }, {
      headers: new HttpHeaders({
        'Content-Type': 'application/json'
      })
    }).subscribe((res) => {
      console.log(res);
    })
  }

  getTestData() {
    var obj1 = {
      name: 'alice',
      age: '20'
    }
    var params = Qs.stringify(obj1);
    console.log(params)
    //第一种方式：字符串拼接
    this.http.get('http://localhost:3000/api/school?' + params).subscribe((res) => {
      console.log(res);
    })

    //第二种方式：HttpParams
    var oarma = new HttpParams({ fromString: params });
    this.http.get('http://localhost:3000/api/school?', {
      params: oarma
    }).subscribe((res) => {
      console.log(res);
    })

  }

  getJsonpData() {
    this.http.jsonp('http://localhost:3000/getscript', 'callback').subscribe((res) => {
      console.log(res);
    })
  }

http encapsulation

import { Injectable } from '@angular/core';
import {HttpClient,HttpHeaders,HttpParams} from '@angular/common/http';
import Qs from 'qs';
import { environment } from '../../environments/environment';
console.log(environment.baseURL);

@Injectable({
  providedIn: 'root'
})
export class RxjsService {

  constructor(public http:HttpClient) { }

  postFun(url,data){
      return this.http.post(environment.baseURL+url,data,{
        headers:new HttpHeaders({
          'Content-Type':'application/json'
        })
      })
  }

  getFun(url,data){
      var params = Qs.stringify(data);
      return this.http.get(environment.baseURL+url+'?'+params)
  }
}

Used

import { Component, OnInit } from '@angular/core';
import {RxjsService} from '../../services/rxjs.service';
@Component({
  selector: 'app-rxjs',
  templateUrl: './rxjs.component.html',
  styleUrls: ['./rxjs.component.less']
})
export class RxjsComponent implements OnInit {

  constructor(public rxjs:RxjsService) { }

  ngOnInit(): void {
  }

  getRXJS(){
    this.rxjs.getFun('/api/school',{
      name:'alice'
    }).subscribe((res)=>{
      console.log(res);
    })
  }

  postRXJS(){
    this.rxjs.postFun('/api/info',{
      name:'alice'
    }).subscribe((res)=>{
      console.log(res);
    })
  }

}

More programming related knowledge , please visit: programming video! !

The above is the detailed content of A brief discussion on the usage of http request module in Angular. For more information, please follow other related articles on the PHP Chinese website!