# 此文件应放在 Nginx http {} 上下文中，例如 /etc/nginx/conf.d/chui_zhi_api.conf。
# 部署前替换 YOUR_API_DOMAIN 和证书路径。

limit_req_zone $binary_remote_addr zone=chui_zhi_api_rate:10m rate=100r/s;
limit_conn_zone $binary_remote_addr zone=chui_zhi_api_conn:10m;

upstream chui_zhi_api_backend {
    server 127.0.0.1:8888;
    keepalive 64;
}

server {
    listen 80;
    listen [::]:80;
    server_name YOUR_API_DOMAIN;

    return 301 https://$host$request_uri;
}

server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name YOUR_API_DOMAIN;

    ssl_certificate /etc/letsencrypt/live/YOUR_API_DOMAIN/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/YOUR_API_DOMAIN/privkey.pem;
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 1d;

    client_max_body_size 1m;
    gzip on;
    gzip_min_length 1k;
    gzip_types application/json;
    limit_req zone=chui_zhi_api_rate burst=200 nodelay;
    limit_conn chui_zhi_api_conn 50;

    add_header X-Content-Type-Options nosniff always;
    add_header Referrer-Policy no-referrer always;

    # 如果新加坡服务器有固定出口 IP，建议取消下面两行注释并替换 IP。
    # allow 203.0.113.10;
    # deny all;

    location = /api/v1/crawler/videos/query {
        limit_except POST {
            deny all;
        }

        proxy_pass http://chui_zhi_api_backend;
        proxy_http_version 1.1;
        proxy_set_header Connection "";
        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;
        proxy_set_header X-Request-ID $http_x_request_id;

        proxy_connect_timeout 5s;
        proxy_send_timeout 30s;
        proxy_read_timeout 40s;
        proxy_buffering on;
    }

    # 运维探针只允许本机访问，不作为公网业务接口暴露。
    location ~ ^/(health|ready)$ {
        allow 127.0.0.1;
        allow ::1;
        deny all;
        proxy_pass http://chui_zhi_api_backend;
        proxy_set_header Host $host;
    }

    location / {
        return 404;
    }
}