cdn.conf

## /etc/nginx/conf.d/cdn.conf;
server {
    listen 8080 default_server;
    server_name _;

    resolver local=on;
    set_by_lua $backend_url 'return os.getenv("BACKEND_URL") or "hello"';

    location / {

        slice 1m;   #缓存分片大小
        proxy_cache my_cache;  # 使用的缓存
        proxy_cache_key $uri$is_args$slice_range; #缓存的key,命中规则依赖这个 
        proxy_set_header Range $slice_range;
        proxy_cache_valid 200 206 1h;
        proxy_cache_valid 301 302 10m;
        proxy_cache_valid any 1m;
        #proxy_cache_valid 404 1m;

        add_header X-Cache-Status $upstream_cache_status;

        # 支持 Range 请求
        proxy_set_header Range $http_range;
        #proxy_set_header If-Range $http_if_range;

        proxy_pass $backend_url;
        #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;

        # 缓存分片响应，避免缓存整个大文件
        #proxy_force_ranges on;
    }
    client_max_body_size 10240m;
}