提交打印任务后，无任务记录、无错误日志
1、可能是LPD协议太老，有兼容性问题
2、发现打印分辨率降到300dpi可以正常打印
3、可能是nginx丢弃了过大的数据
附可正常使用的nginx配置文件
server {
listen 1631;
server_name zero2w.local;
# 允许较大的 IPP / 打印任务体积
client_max_body_size 100m;
location / {
proxy_pass http://127.0.0.1:631;
# 保留 CUPS 所需的 Host 语义
proxy_set_header Host "localhost:631";
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Real-IP $remote_addr;
# IPP 打印必须关闭缓冲
proxy_buffering off;
proxy_request_buffering off;
# 防止大任务/慢打印导致超时
proxy_read_timeout 600s;
proxy_send_timeout 600s;
}
}
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