How uniapp implements network request encapsulation

Uniapp implements network request encapsulation method: first implement the initial request; then create a new [request.js] file, the code is [return new Promise((resolved, rejected) => {uni.request..] ;Finally just optimize.

The operating environment of this tutorial: windows7 system, uni-app2.5.1 version, this method is suitable for all brands of computers.

Recommended (free): uni-app development tutorial

uniapp’s method of implementing network request encapsulation:

1. The initial request for uniapp is used as follows:

uni.request({
    url: 'https://www.example.com/request', //仅为示例，并非真实接口地址。
    data: {
        text: 'uni.request'
    },
    header: {
        'custom-header': 'hello' //自定义请求头信息
    },
    success: (res) => {
        console.log(res.data);
     }.fail = (err) => {
     console.log(err);
  }
});

2. We first perform a simple encapsulation through Promise and create a new request.js file:

//options参数我们后面会说
function service(options = {}) {
return new Promise((resolved, rejected) => {
uni.request({
   url: options.url, //仅为示例，并非真实接口地址。
   data: options.data,
   header: {
       'content-type': 'application/x-www-form-urlencoded',
       'accessToken': `${token}` //权限token 
   },
   success: (res) => {
      rejected(res.data);
   }.fail = (err) => {
   rejected(err)
 }
});
}
}
export default service;

3. Finally, we optimize again based on the previous step.

//把配置项单独处理
import store from '/store/index.js'; //vuex  
let server_url=' ';//请求地址
let token = ' ';  凭证
process.env.NODE_ENV === 'development' ? '192.168.0.1' : 'http://***/api' ; //环境配置
function service(options = {}) {
       store.state.token && (token = store.state.token); //从vuex中获取登录凭证
       options.url = `${server_url}${options.url}`;
          //配置请求头
        options.header = {
        'content-type': 'application/x-www-form-urlencoded',
        'accessToken': `${token}` //Bearer 
    };
    return new Promise((resolved, rejected) => {
                //成功
        options.success = (res) => {
              
            if (Number(res.data.code) == 0) {  //请求成功
                resolved(res.data.data);
            } else {
                uni.showToast({
                    icon: 'none',   
                    duration: 3000,
                    title: `${res.data.msg}`
                });
                rejected(res.data.msg);//错误
            }
        }
              //错误
        options.fail = (err) => {
            rejected(err); //错误
        }
        uni.request(options);
    });
}
export default service;

4. Now we use it in the page.

1. Create a new pages page.

The directory is as follows

┌─common

│ ├─request.js //Request

┌─ pages

│ ├─index

│ │ └─api.js //api list

│ │ └─index.vue //Page file

├─static

├─store

│ ├─index.js //vuex

├─main.js

├─App.vue

├─manifest.json

└─pages.json

2. Configure api list. api.js //api list

import request from '/common/request.js'
export function login(data) {
  return request({
    url: '/user/login',
    method: 'POST',
    data
  })
}

3. Use

import { login} from './api.js';  //引入需要的api
//发起请求
onLoad() {
login('parameter').then(data => {
   console.log(data);
});
}...

on the page

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