回答

购买一台服务器，安装好nginx，然后创建一个公共读的oss，这个私有的bucket地址不要公开，增加了中间缓存与ip流量限流，配置如下：

http {
    # 全局缓存设置
    proxy_cache_path /data/nginx/cache levels=1:2 keys_zone=my_cache:10m max_size=10g inactive=15d use_temp_path=off;

    # 限流配置
    limit_req_zone $binary_remote_addr zone=my_zone:10m rate=333k;

    # ... 其他http块的配置 ...

    server {
        server_name youdomian.com;

        listen 443 ssl;
        ssl_certificate /usr/local/nginx/ssl/domian.crt;
        ssl_certificate_key /usr/local/nginx/ssl/domian.key;
        ssl_session_timeout 10m;
        access_log /data/wwwlogs/oss_access_nginx.log combined;
        ssl_buffer_size 64k;
        ssl_session_cache shared:SSL:10m;
        ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;
        ssl_protocols TLSv1 TLSv1.1 TLSv1.2 SSLv3;
        ssl_prefer_server_ciphers on;

        location / {
            # 跨域配置
            # add_header 'Access-Control-Allow-Origin' $http_origin;
            # add_header 'Access-Control-Allow-Credentials' 'true';
            # add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
            # add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Content-Range,Range';
            add_header Cache-Control max-age=1296000;

            # 开启缓存
            proxy_cache my_cache;
            proxy_cache_valid 200 15d;  # 200状态码的响应缓存15天
            proxy_cache_methods GET HEAD POST;  # 缓存GET, HEAD, POST请求
            proxy_cache_use_stale error timeout updating http_500 http_502 http_503 http_504;

            # 限流配置
            limit_req zone=my_zone burst=40 nodelay;

            proxy_pass https://yourbackend.domain.com;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;
            proxy_max_temp_file_size 0;
            proxy_connect_timeout 300;
            proxy_send_timeout 300;
            proxy_read_timeout 300;
            proxy_buffer_size 64k;
            proxy_buffers 4 64k;
            proxy_busy_buffers_size 128k;
            expires 15d;
        }
    }

    # ... 其他可能的server块和配置 ...
}