我在局域网中用 ArchLinux+hplip+cups+avahi 设置了一个 IPP+DNSSD 打印服务器。架构图如下：
我正在尝试使用此打印服务器制作我的 Linux 桌面。我安装并启用了 cups、hplip 和 avahi-daemon。但是，它仍然没有使用我的服务器。IPP 和 DNSSD 打印均失败并显示相同的错误消息：
processing since
Thu 05 Dec 2019 05:23:09 PM CST
"Filter failed"
/var/log/cups/error_log:
...
E [05/Dec/2019:17:47:02 +0800] [CGI] Saw EOF, expected \'}\'!
E [05/Dec/2019:17:47:13 +0800] [CGI] Saw EOF, expected \':\'!
E [05/Dec/2019:17:47:13 +0800] [CGI] Saw EOF, expected \'}\'!
E [05/Dec/2019:17:47:13 +0800] [CGI] Saw EOF, expected \'}\'!
E [05/Dec/2019:17:47:13 +0800] [CGI] Saw EOF, expected \'}\'!
E [05/Dec/2019:17:47:24 +0800] [CGI] Saw EOF, expected \':\'!
E [05/Dec/2019:17:47:24 +0800] [CGI] Saw EOF, expected \'}\'!
E [05/Dec/2019:17:47:24 +0800] [CGI] Saw EOF, expected \'}\'!
E [05/Dec/2019:17:47:24 +0800] [CGI] Saw EOF, expected \'}\'!
E [05/Dec/2019:17:47:35 +0800] [CGI] Saw EOF, expected \':\'!
E [05/Dec/2019:17:47:35 +0800] [CGI] Saw EOF, expected \'}\'!
E [05/Dec/2019:17:47:35 +0800] [CGI] Saw EOF, expected \'}\'!
E [05/Dec/2019:17:47:35 +0800] [CGI] Saw EOF, expected \'}\'!
E [05/Dec/2019:17:47:46 +0800] [CGI] Saw EOF, expected \':\'!
E [05/Dec/2019:17:47:46 +0800] [CGI] Saw EOF, expected \'}\'!
E [05/Dec/2019:17:47:46 +0800] [CGI] Saw EOF, expected \'}\'!
E [05/Dec/2019:17:47:46 +0800] [CGI] Saw EOF, expected \'}\'!
E [05/Dec/2019:17:47:57 +0800] [CGI] Saw EOF, expected \':\'!
E [05/Dec/2019:17:47:57 +0800] [CGI] Saw EOF, expected \'}\'!
...
我尝试重新安装 hplip，卸载 hplip，重新安装 cups。尝试通过 DNSSD、IPP+PPD_file、IPP+hplip 添加打印机。但都不起作用……
您能提供一些建议吗？