问题描述
我有express.js服务器:
I have express.js server:
import express from 'express';
import cors from 'cors';
import bodyParser from 'body-parser';
import mongoose from 'mongoose';
import helmet from 'helmet';
import config from './config/config.js';
import authRoutes from './routes/auth.js';
import userRoutes from './routes/user.js';
mongoose.connect(config.mongoUri, { useNewUrlParser: true });
mongoose.connection.on('error', () => {
throw new Error(`unable to connect to database: ${config.mongoUri}`);
});
const port = 9000;
const app = express();
app.use(helmet());
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
app.use(cors());
app.use((req, res, next) => {
res.header('Access-Control-Allow-Origin', '*');
res.header('Access-Control-Allow-Methods', 'POST,GET,LINK');
});
app.use('/', authRoutes);
app.use('/', userRoutes);
app.listen(port, () => console.log(`Example app listening on port ${port}!`));
Cors软件包完全安装在package.json中.这是我的路线
Cors package install corectly in package.json.Here is my routes
import express from 'express';
import authCtrl from '../controllers/auth.controller.js';
const router = express.Router();
router.route('/auth/signin').post(authCtrl.signin);
router.route('/auth/signout').get(authCtrl.signout);
export default router;
当我尝试向邮递员发出请求时-一切正常,但是,当尝试从另一台服务器进行登录时:
When i trying to make request from Postman - all is working,but when try to do in from another server :
const signin = user => {
console.log('user', user);
return fetch('http://localhost:9000/auth/signin/', {
method: 'POST',
headers: {
'Access-Control-Allow-Origin': '*',
Accept: 'application/json',
},
credentials: 'include',
body: JSON.stringify(user),
})
.then(response => {
return response.json();
})
.catch(err => console.log(err));
};
在控制台中发生错误
在网络中,我可以看到可选请求:访问控制允许标题:访问控制允许起源允许访问控制的方法:GET,HEAD,PUT,PATCH,POST,DELETE访问控制允许来源:*
In network i can see OPTIONAL request :Access-Control-Allow-Headers: access-control-allow-originAccess-Control-Allow-Methods: GET,HEAD,PUT,PATCH,POST,DELETEAccess-Control-Allow-Origin: *
那我该如何解决这个问题?
So how can I fix this problem?
推荐答案
使用cors npm时:
as you are using cors npm :
在您的应用js中,只需在下面添加并删除不必要的代码
in your app js just add below and remove unnecessary code
import cors from 'cors';
app.use(cors());
以及 package.json
文件中的react project文件夹中:
and in your react project folder in package.json
file :
"proxy": "http://localhost:9000",
因此您的api调用将是:
so your api call will be :
const signin = user => {
console.log('user', user);
return fetch('/auth/signin', {
method: 'POST',
credentials: 'include',
body: JSON.stringify(user),
})
.then(response => {
return response.json();
})
.catch(err => console.log(err));
};
这篇关于如何解决CORS错误:请求未通过访问控制检查?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!