server {
    listen 80;
    server_name openai.xxx.com;

    # 自动重定向到 HTTPS
    return 301 https://$host$request_uri;
}

server {
    listen 443 ssl http2;
    server_name openai.xxx.com;

    # SSL 证书配置
    ssl_certificate     /root/cert/openai.xxx.com.pem;
    ssl_certificate_key /root/cert/openai.xxx.com.key;

    # 推荐的安全配置
    ssl_protocols       TLSv1.2 TLSv1.3;
    ssl_ciphers         HIGH:!aNULL:!MD5;

    # 反向代理设置
    location / {
        proxy_pass https://api.openai.com/;
        proxy_http_version 1.1;
        proxy_set_header Host api.openai.com;
        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;

    proxy_ssl_server_name on;
    proxy_ssl_name api.openai.com;

        # 防止 WebSocket 断连（如有需要）
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }

    # 可选：限制上传大小
    client_max_body_size 20M;

    # 可选：开启压缩
    gzip on;
    gzip_types application/json text/plain text/css application/javascript;
    gzip_min_length 1000;

    # 可选：访问日志
    access_log /var/log/nginx/api.access.log;
    error_log  /var/log/nginx/api.error.log;
}