server {
    listen 9010;
    server_name localhost 127.0.0.1 14.103.170.252;

    # 火山引擎API代理
    location /api/volcengine/ {
        proxy_pass https://openspeech.bytedance.com/api/v1/auc/;
        proxy_set_header Host openspeech.bytedance.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;

        # 处理CORS
        add_header Access-Control-Allow-Origin *;
        add_header Access-Control-Allow-Methods 'GET, POST, OPTIONS';
        add_header Access-Control-Allow-Headers 'DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Authorization';

        # 处理OPTIONS预检请求
        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,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Authorization';
            add_header Access-Control-Max-Age 1728000;
            add_header Content-Type 'text/plain; charset=utf-8';
            add_header Content-Length 0;
            return 204;
        }

        # 超时设置
        proxy_connect_timeout 30s;
        proxy_send_timeout 30s;
        proxy_read_timeout 30s;

        # 日志记录
        access_log /var/log/nginx/volcengine_access.log;
        error_log /var/log/nginx/volcengine_error.log;
    }

    location / {
        alias /yantoo/frontend/study-online/;
        index index.html index.htm;
        try_files $uri $uri/ /index.html;
    }
}