current position:Home>Cross domain problem handling of react
Cross domain problem handling of react
2021-08-27 02:06:54 【He Xiaoshi】
This is my participation 8 The fourth of the yuegengwen challenge 20 God , Check out the activity details :8 Yuegengwen challenge
Suitable for react17+ Version of
First step : stay package.json Inside plus proxy
This proxy Must if String type , And it is a local path that needs to cross domain
"proxy": "http://localhost:3000"
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The second step : Set up setupProxy.js, Set cross domain path settings
stay src below , newly build setupProxy.js, The code is as follows
const {createProxyMiddleware} = require("http-proxy-middleware");
module.exports = function (app) {
// app.use(
// createProxyMiddleware("/apis", {
// target: "https://xxx.xxx.cn", // Cross domain web address required
// changeOrigin: true, // Cross domain
// })
// )
app.use(
createProxyMiddleware("/api", { // This /api, Is the identified request path splicing , Tell request , When what request , You need to cross domain here
target: "https://c.m.163.com/ug",
changeOrigin: true, // Cross domain
})
)
}
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And then ok La ~
Cross domain requests can be made
import React from 'react'
import ReactDom from 'react-dom'
import axios from 'axios'
(async function() {
const url = '/api/wuhan/app/data/list-total?t=' + new Date().getTime()
const res = await axios.get(url)
console.log(res)
}())
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\
The second step is to have a deep pit (React Agent exception in Proxy is not a function)
problem : Official proxy The configuration document (www.html.cn/create-reac…)
as follows
const proxy = require('http-proxy-middleware');
module.exports = function(app) {
app.use(proxy('/api', { target: 'http://xxx.xxx.com' }));
};
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The startup error is as follows
proxy is not a function
error Command failed with exit code 1.
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Solution : Inquire about npm Of http-proxy-middleware, Find out 1.x Major changes have been made .
file (www.npmjs.com/package/htt…)
Write it correctly :
const {createProxyMiddleware} = require('http-proxy-middleware');
module.exports = function(app) {
app.use(createProxyMiddleware('/api', { target: 'http://localhost:5000/' }));
};
// perhaps
const proxy = require('http-proxy-middleware');
module.exports = function(app) {
app.use(proxy.createProxyMiddleware('/api', { target: 'http://localhost:5000/' }));
};
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Slice tail : http.js To configure
import axios from 'axios'
import qs from 'qs'
axios.defaults.baseURL = 'https://c.m.163.com/ug/'
axios.defaults.withCredentials = true
axios.defaults.timeout = 100000
let http = { post: '', get: '' }
http.post = (api, data) => {
const params = qs.stringify(data)
return new Promise((resolve, reject) => {
axios.post(api, params).then(r => {
resolve(r)
}).catch(e => {
reject(e)
})
})
}
http.get = (api, data) => {
const params = qs.stringify(data)
return new Promise((resolve, reject) =>{
axios.get(api, params).then(r => {
resolve(r)
}).catch(e => {
reject(e)
})
})
}
export default http
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Last
official account : Xiao he grows up , Buddhist Geng Wen , They are all the pits they have stepped on or learned
Interested friends are welcome to pay attention to me , I am a :
He Xiaoshi
. Let's make progress togetherA little busy recently , The article may have some water , If you have problems, you can pay attention to my official account. , Communicate together
The comments are written in the code , See forgiveness
copyright notice
author[He Xiaoshi],Please bring the original link to reprint, thank you.
https://en.qdmana.com/2021/08/20210827020643619Q.html
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