Nginx缓存不适用于.gz扩展文件

Question

Followwing是nginx的一部分，nginx不适用于.gz扩展名，只有nginx不会保存缓存的数据，而是每个从后端服务器（upstreadm）填满的请求，在img文件和其他扩展名中也是如此。 我想要的是nginx首先将文件缓存到服务器，如果不在缓存中，则转到上游服务器从那里拉取文件。

location ~ \.(?:okl)$ {
    proxy_temp_file_write_size 800k;                
    proxy_temp_path   /usr/local/nginx/proxy_temp;   
    gzip_static on;
    expires 30d;
    add_header 'Access-Control-Allow_Credentials' 'true';
                    add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
                    proxy_buffers 16 4k;
                    proxy_buffer_size 2k;
                    proxy_set_header Host $host;
                    proxy_set_header X-Real-IP $remote_addr;
                    proxy_set_header Accept-Encoding "";

                    rewrite ^/(.*)$ /$1.gz break;
                     proxy_cache_bypass $http_cachepurge; # mand
    #               proxy_cache_bypass $admin_user;
                    #proxy_set_header Accept */*;
                    #proxy_set_header Accept-Encoding "gzip, deflate, br";
                    proxy_pass https://localhost;#
                     proxy_cache_bypass $http_cachepurge;  # mand
                    proxy_cache cache;
                    #configure header for retrieving .gz and
                    #proxy_hide_header Content-Type;
                    add_header Content-Type text/plain always;
                    add_header Content-Type application/javascript always;
                    add_header Content-Encoding gzip;
                    add_header Transfer-Encoding gzip;
                    add_header X-Frame-Options: deny;
    # You might want to hide the following headers:
                    proxy_hide_header x-bz-file-name;
                    proxy_hide_header x-bz-file-id;
                    proxy_hide_header x-bz-content-sha1;
                    proxy_hide_header x-Bz-Upload-Timestamp;
                    proxy_hide_header x-bz-info-src_last_modified_millis;
            }

    ##### GZIP FILED SERVERED

     location ~ \.(?:gz)$ {
       proxy_temp_file_write_size 800k;                
       proxy_temp_path   /usr/local/nginx/proxy_temp;   

       gzip_static on;
       expires 30d;
       add_header 'Access-Control-Allow_Credentials' 'true';
                    add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
                    proxy_buffers 16 4k;
                    proxy_buffer_size 2k;
                    proxy_set_header Host $host;
                    proxy_set_header X-Real-IP $remote_addr;
                   proxy_set_header Accept-Encoding "";

    #                rewrite ^/(.*)$ /$1.gz break;
    #                 proxy_cache_bypass $http_cachepurge; # mand
    #               proxy_cache_bypass $admin_user;
                    #proxy_set_header Accept */*;
                    #proxy_set_header Accept-Encoding "gzip, deflate, br";
                    proxy_pass http://backend;
                    proxy_cache_bypass $http_cachepurge;  # mand
                    proxy_cache cache;
                    #configure header for retrieving .gz and
                    proxy_hide_header Content-Type;
                    #add_header Content-Type text/plain always;
                    add_header Content-Type application/javascript always;
                    add_header Content-Encoding gzip;
                    add_header Transfer-Encoding gzip;
                    add_header X-Frame-Options: deny;

                    # You might want to hide the following headers:
                    proxy_hide_header x-bz-file-name;
                    proxy_hide_header x-bz-file-id;
                    proxy_hide_header x-bz-content-sha1;
                    proxy_hide_header x-Bz-Upload-Timestamp;
                    proxy_hide_header x-bz-info-src_last_modified_millis;
            }