利用express中间件http-proxy-middleware代理前端跨域请求————————————————。

[JavaScript]

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复制代码

var express = require('express');

var path = require('path');

var favicon = require('serve-favicon');

var logger = require('morgan');

var cookieParser = require('cookie-parser');

var bodyParser = require('body-parser');

// 代理插件

var proxy = require('http-proxy-middleware');

// 跨域插件

var cors = require('cors');

var app = express();

app.use(cors());

app.set('views', path.join(__dirname, 'views'));

app.set('view engine', 'jade');

app.use(logger('dev'));

app.use(bodyParser.urlencoded({

extended: true

}));

app.use(cookieParser());

app.use(express.static(path.join(__dirname, 'static')));

// 设置代理

app.use('/jygoods-api', proxy({

target: 'https://m.jyall.com',

changeOrigin: true

}));

app.use(function(req, res, next) {

var err = new Error('Not Found');

err.status = 404;

next(err);

});

// error handler

app.use(function(err, req, res, next) {

res.locals.message = err.message;

res.locals.error = req

.app

.get('env') === 'development' ?

err : {};

// render the error page

res.status(err.status || 500);

res.render('error');

});

app.listen(4000, function() {

console.log('http://localhost:4000')

});

2,和app.js创建static静态资源存放目录

3,cnpm 安装相关依赖

4,node启动app.js

http://localhost:4000/jygoods-api*** 请求被代理到 https://m.jyall.com/jygoods-api***

补充一个package.json的内容,npm install 直接就可以使用

{

"dependencies": {

"atob": "^2.1.1",

"body-parser": "^1.18.3",

"cookie-parser": "^1.4.3",

"cors": "^2.8.4",

"decode-uri-component": "^0.2.0",

"express": "^4.16.3",

"http-proxy-middleware": "^0.18.0",

"morgan": "^1.9.0",

"path": "^0.12.7",

"serve-favicon": "^2.5.0",

"source-map-resolve": "^0.5.2",

"source-map-url": "^0.4.0",

"urix": "^0.1.0"

}

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原文链接：https://blog.csdn.net/song_de/article/details/79652818