即使我安装了 cors 并且设置了标头，也会出现 CORS 错误

Question

在我的入口文件中，我使用了 cors() 并且还设置了标头来与 cors 错误进行协商。但是当我尝试在另一个文件 payment.js 上为发布请求设置标题时，我收到了 cors 错误。

我还在入口点 server.js 中导入了 payment.js。

我不明白出了什么问题。

提前谢谢你

Error I am getting 


Access to XMLHttpRequest at 'http://192.168.43.147:4000/payment-check' from origin 'http://localhost:8100' has been blocked by CORS policy: The 'Access-Control-Allow-Origin' header has a value 'http://localhost:4200' that is not equal to the supplied origin

这是我的入口点 server.js

const path = require('path');
const bodyParser = require('body-parser')
const app = express();

// parse requests of content-type - application/json
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());

var cors = require('cors');
app.use(cors());

const routes = require('./payment/ordersapi');
app.use(routes);

const payments = require('./payment/payment');
app.use(payments);


app.use(function (req, res, next) {
  res.setHeader('Access-Control-Allow-Origin', 'http://localhost:4200', 'http://localhost:8100');
  res.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS, PUT, PATCH, DELETE');
  res.setHeader('Access-Control-Allow-Headers', 'X-Requested-With,content-type');
  res.setHeader('Access-Control-Allow-Credentials', true);
  next();
});

payment.js // 另一个文件

const express = require('express');
const app = express();

const router = express.Router();
app.use('/', router);   

router.post('/payment-check', function(req,res ) {

    var options = req.body
    console.log(options)

    var payment_id = options.razorpay_payment_id
    res.setHeader('payment_id' ,payment_id)
    res.redirect('http://localhost:8100/order-success')


})

module.exports = router;

Answer 1

你的兄弟！你正在使用路由器，甚至导出它，但你 neva 声明了它。