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[英]How to correctly configure server and browser to avoid cors errors? Fetch API + Node.js
[英]How to correctly configure Nginx for Node.js REST API?
我有一個節點應用程序在Apache和Nginx作為反向代理的服務上運行。
在同一台服務器上,還運行了一個Node REST API。
JavaScript代碼如下所示:
api.js
// Express
const express = require('express');
const bodyParser = require('body-parser');
const cors = require('cors');
// Express App
const app = express();
// Env
const PORT = process.env.PORT || 3000;
const NODE_ENV = process.env.NODE_ENV || 'development';
// Config
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
app.use(cors());
// Routes
const users = require('./routes/users');
// Angular Http content type for POST etc defaults to text/plain at
app.use(bodyParser.text(), function ngHttpFix(req, res, next) {
try {
req.body = JSON.parse(req.body);
next();
} catch(e) {
next();
}
});
app.use('/api', users);
app.listen(PORT, function() {
console.log('Listen on http://localhost:' + PORT + ' in ' + NODE_ENV);
});
/routes/users.js
var models = require('../models');
var express = require('express');
var router = express.Router();
// get all users
router.get('/users', function(req, res) {
models.Beekeeper.findAll({}).then(function(users) {
res.json(users);
});
});
module.exports = router;
Nginx配置如下所示:
index index.html index.htm;
upstream api {
server 127.0.0.1:3000;
}
server {
listen 80;
server_name example.com;
return 301 https://$server_name$request_uri;
}
server {
listen 443;
root /var/www;
ssl on;
ssl_prefer_server_ciphers On;
ssl_protocols TLSv1.2;
ssl_session_cache shared:SSL:10m;
ssl_session_timeout 10m;
ssl_ciphers AES256+EECDH:AES256+EDH:!aNULL;
add_header Strict-Transport-Security "max-age=63072000; includeSubdomains; preload";
add_header X-Frame-Options DENY;
add_header X-Content-Type-Options nosniff;
ssl_dhparam /etc/nginx/ssl/dhparam.pem;
ssl_certificate /etc/letsencrypt/live/example.com/cert.pem;
ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem;
server_name example.com;
location / {
proxy_pass http://127.0.0.1:8000;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header Host $host;
proxy_set_header X-Real-Ip $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
}
location /api {
proxy_pass http://api;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header Host $host;
proxy_set_header X-Real-Ip $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
rewrite ^/api/?(.*) /$1 break;
proxy_redirect off;
}
}
問題是如果我在我的開發服務器上進行API調用,例如localhost:3000 / api / users,它會按預期工作。
但是,如果我在生產服務器上進行API調用,例如, https://example.com/api/users ,我分別得到Can not GET / users和404 NOT FOUND 。
我想我的Nginx配置有問題,但是,雖然我已經在Stackoverflow上閱讀了很多關於類似問題的帖子,但我無法解決問題。
請注意,您要求:
https://example.com/api/users
但錯誤說明了這一點:
無法獲得/用戶
因此,在傳遞給您的節點服務器之前, /api
前綴將從請求路徑中刪除。
這是由這一行完成的:
rewrite ^/api/?(.*) /$1 break;
解決方案:刪除該行。
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