Apche配置：

<IfModule log_config_module>

LogFormat "%{X-Forwarded-For}i %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined

LogFormat "%{X-Forwarded-For}i %l %u %t \"%r\" %>s %b" common

<IfModule logio_module>

LogFormat "%{X-Forwarded-For}i %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\" %I %O" combinedio

</IfModule>

CustomLog "logs/access_log" common

</IfModule>