Nginx解决跨域资源共享漏洞

如何为Nginx配置安全的跨域资源共享（CORS）？

• if ($request_method = 'OPTIONS') 用于处理预检请求（OPTIONS请求）。
• add_header 'Access-Control-Allow-Origin' '*' 允许所有域访问资源。你可以将*替换为特定的域名以限制访问。
• add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS' 指定允许的HTTP方法。
• add_header 'Access-Control-Allow-Headers' 指定允许的请求头。
• add_header 'Access-Control-Expose-Headers' 指定哪些响应头可以暴露给前端。
• proxy_pass http://backend_server 将请求转发到后端服务器。

server {
    listen 80;
    server_name your_domain.com;

    location / {
        if ($request_method = 'OPTIONS') {
            add_header 'Access-Control-Allow-Origin' '*';
            add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
            add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range';
            add_header 'Access-Control-Max-Age' 1728000;
            add_header 'Content-Type' 'text/plain; charset=utf-8';
            add_header 'Content-Length' 0;
            return 204;
        }

        add_header 'Access-Control-Allow-Origin' '*';
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
        add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range';
        add_header 'Access-Control-Expose-Headers' 'Content-Length,Content-Range';

        proxy_pass http://backend_server;
        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;
    }
}