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目录
Axios封装
Axios跨域配置
创建服务器提供数据
Axios封装
封装 axios 之后,在使用上会更优雅,我们知道面向对象编程 (OOP)遵循,低耦合高内聚。我们把网络请求放在一起更利于后期维护
import axios from "axios"import qs from "querystring"/** * 处理错误信息 * status:状态吗 * info:具体信息 */const errorHandle = (status,info) =>{ switch(status){ case 400: console.log("语义错误"); break; case 401: console.log("服务器认证失败"); break; case 403: console.log("服务器请求拒绝执行"); break; case 404: console.log("请检查网路请求地址"); break; case 500: console.log("服务器发生意外"); break; case 502: console.log("服务器无响应"); break; default: console.log(info); break; }}/** * 创建Axios对象 */const instance = axios.create({ baseURL:"http://iwenwiki.com", timeout:5000})/** * 拦截器 */instance.interceptors.request.use( config =>{ if(config.method === 'post'){ config.data = qs.stringify(config.data) } return config }, error => Promise.reject(error))instance.interceptors.response.use( response => response.status === 200 ? Promise.resolve(response) : Promise.reject(response), error =>{ const { response } = error; if(response){ errorHandle(response.status,response.info) }else{ console.log("网络请求被中断了"); } })export default instance
import axios from "../utils/request"const baseUrl = { banner:"/api/blueberrypai/getIndexBanner.php"}const api = { getBanner(){ return axios.get(baseUrl.banner) }}export default api
<template> <h3>网络请求</h3> <ul> <li v-for="item in fingerUnion.data" :key="item"> <h3>{{ item.title }}</h3> <p>{{ item.content }}</p> </li> </ul></template><script setup> import { onMounted,reactive } from "vue" import api from "../../api" const fingerUnion = reactive({ data:{}})onMounted(() =>{ api.getBanner().then(res =>{ fingerUnion.data = res.data.banner })})</script>
实时效果反馈
1.下列代码,画横线处应该填写的代码是:
import axios from "axios"import qs from "querystring"/** * 处理错误信息 * status:状态吗 * info:具体信息 */const errorHandle = (status,info) =>{ switch(status){ case 400: console.log("语义错误"); break; case 401: console.log("服务器认证失败"); break; case 403: console.log("服务器请求拒绝执行"); break; case 404: console.log("请检查网路请求地址"); break; case 500: console.log("服务器发生意外"); break; case 502: console.log("服务器无响应"); break; default: console.log(info); break; }}/** * 创建Axios对象 */const instance = axios.create({ baseURL:"http://iwenwiki.com", timeout:5000})/*** 拦截器 */instance.___.request.use( config =>{ if(config.method === 'post'){ config.data = qs.stringify(config.data) } return config }, error => Promise.reject(error))instance.___.response.use( response => response.status === 200 ? Promise.resolve(response) : Promise.reject(response), error =>{ const { response } = error; if(response){ errorHandle(response.status,response.info) }else{ console.log("网络请求被中断了"); } })export default instance
A axios
B response
C instance
D interceptors
Axios跨域配置
在工作的真实场景中,跨域是常见问题,所以我们需要解决跨域问题
import { fileURLToPath, URL } from 'node:url'import { defineConfig } from 'vite'import vue from '@vitejs/plugin-vue'// https://vitejs.dev/config/export default defineConfig({ plugins: [vue()], resolve: { alias: { '@': fileURLToPath(new URL('./src', import.meta.url)) } }, server: { proxy: { '^/api': { target: 'http://iwenwiki.com', // 后端服务实际地址 changeOrigin: true, //开启代理 rewrite: (path) => path.replace(/^\/api/, '') } } }})
<template> <h3>网络请求</h3> <ul> <li v-for="item in list.info" :key="item.id"> <p>{{ item.title }}</p> </li> </ul></template><script setup> import { onMounted,reactive } from "vue" import axios from "axios" const list = reactive({ info:[]})onMounted(() =>{ axios.get("/api/api/FingerUnion/list.php") .then(res =>{ list.info = res.data.data }) .catch(error =>{ console.log(error); })})</script>
实时效果反馈
1.下列代码,画横线处应该填写的代码是:
import { fileURLToPath, URL } from 'node:url'import { defineConfig } from 'vite'import vue from '@vitejs/plugin-vue'// https://vitejs.dev/config/export default defineConfig({ plugins: [vue()], resolve: { alias: { '@': fileURLToPath(new URL('./src', import.meta.url)) } }, server: { proxy: { '^/api': { ___: 'http://iwenwiki.com', // 后端服务实际地址 changeOrigin: true, //开启代理 rewrite: (path) => path.replace(/^\/api/, '') } } }})
A axios
B target
C instance
D interceptors
创建服务器提供数据
在真实开发场景中,很多项目是前后端同时开发,那么前端就不会第一时间拿到接口数据,但是为了前端开发期间的测试,我们还是 需要自己创建服务器的
const express = require("express");const app = express();const router = require("./router");const bodyParser = require("body-parser");app.use(bodyParser.urlencoded({ extended:true}))app.use("/api",router);app.listen(3000,() =>{ console.log("server running at port 3000");})
const express = require("express");const router = express.Router();const url = require("url");const list = require("./data/list")router.get("/list",(req,res) =>{ const page = url.parse(req.url,true).query.page; res.send({ status:200, result:list, page })})router.post("/login",(req,res) =>{ const username = req.body.username; const password = req.body.password; res.send({ status:200, username, password })})module.exports = router;
module.exports = [ { id:1001, name:"衣服" }, { id:1002, name:"鞋子" }, { id:1003, name:"电脑" }]