fp='/opt/wecom-it-desk/nginx/nginx.conf'
c=open(fp).read()
p='\n    # 真实 IP 还原(2026-06-15 v0.5.1)\n    set_real_ip_from 10.0.0.0/8;\n    set_real_ip_from 172.16.0.0/12;\n    set_real_ip_from 192.168.0.0/16;\n    set_real_ip_from 10.212.0.0/16;\n    real_ip_header    X-Forwarded-For;\n    real_ip_recursive on;\n'
o='error_log  /var/log/nginx/error.log warn;'
n=c.replace(o,o+p,1)
open(fp,'w').write(n)
print('patched, +%d bytes'%(len(n)-len(c)))