vue project packaging and use of axios

A, axios of features

In the browser transmits a request XMLHttpRequests

Http request transmitted in node.js

Support Promise API

Intercept request and response

Conversion request and response data

Support a variety of ways request:

axios(config)

axios.request(config)

axios.get(url[, config])

axios.delete(url[, config])

axios.head(url[, config])

axios.post(url[, data[, config]])

axios.put(url[, data[, config]])

axios.patch(url[, data[, config]])

Second, common configuration options

Request address

url: '/user',

Request type

method: 'get',

Please root path

baseURL: 'http://www.mt.com/api'

The data processing requests before

transformRequest:[function(data){}],

After the data processing request

transformResponse: [function(data){}],

Custom request header

headers:{'x-Requested-With':'XMLHttpRequest'},

URL query object corresponds to a get request, pass parameters

params:{ id: 12 },

 

Query object serialization function

paramsSerializer: function(params){ }

request body: corresponds to post requests, a data transfer request

data: { key: 'aa'},

S timeout settings

timeout: 1000,

With or without cross-domain Token

withCredentials: false,

Custom request processing

adapter: function(resolve, reject, config){},

Authentication information

auth: { uname: '', pwd: '12'},

响应的数据格式 json / blob /document /arraybuffer / text / stream

responseType: 'json',

三、axios封装

第一步：安装axios

npm install axios --save

第二步：在main.js中引入

import axios from 'axios'

 

第三步：在request.js里面封装

方式一：必须传三个参数 回调函数的方法

 import axios from 'axios'

export function request(config, success, failure) {
    //创建axios实例
    const instance = axios.creat({
        baseURL: 'http://192.168.14.146:8088',
        timeout: 50000
    })
    //发送真正的网络请求
    instance(config.baseconfig)
    .then(res => {
        // console.log(res) //要回调出去
        success(res) //回调
    })
    .catch(err => {
        // console.log(err) //要回调出去
        failure(err) //回调
    })
}

调用：

import {request} from "./network/request"
//方式一：
request({ //config
  url: '',
}, res => { //success
  console.log(res)
}, err => { //failure
  console.log(err)
})

方式二：只传一个config 回调函数的方法

export function request(config) {
    //创建axios实例
    const instance = axios.creat({
        baseURL: 'http://192.168.14.146:8088',
        timeout: 50000
    })
    //发送真正的网络请求
    instance(config.baseconfig)
        .then(res => {
            // console.log(res) //不能直接在这里处理数据要回调出去
            config.success(res) //回调
        })
        .catch(err => {
            // console.log(err) //不能直接在这里处理数据要回调出去
            config.failure(err) //回调
        })
}

调用：

request({
  baseconfig: {

  },
  success: function(res) {

  },
  failure: function(err) {

  }
})

方式三： Promise方法

export function request(config) {
    return new Promise((resolve, reject) => {
        //创建axios实例
        const instance = axios.creat({
            baseURL: 'http://192.168.14.146:8088',
            timeout: 50000
        })
        //发送真正的网络请求
        instance(config)
            .then(res => {
                // console.log(res) //要回调出去
                resolve(res) //回调
            })
            .catch(err => {
                // console.log(err) //要回调出去
                reject(err) //回调
            })
    })
}

这样写其实是有点多余，因为axios本身返回的是一个promise(下图源码)，所以可以直接return，不用自己包装promise

 

export function request(config) {
    //创建axios实例
    const instance = axios.creat({
        baseURL: 'http://192.168.14.146:8088',
        timeout: 50000
    })
    //发送真正的网络请求
   return instance(config) 
   //create 的axios返回值本身是一个promise,所以直接return就可以了，不用自己包装promise
}

调用：

//方式三
request({
  url: '',
}).then(res => {
  console.log(res)
}).catch(err => {
  console.log(err)
})