http://blog.sina.com.cn/s/articlelist_1834459124_1_1.html nginx内置变量杂谈
http://nginx.org/en/docs/http/ngx_http_core_module.html#variables nginx的http_core_module模块中的内置变量
http://blog.sina.com.cn/s/articlelist_1834459124_1_1.html nginx内置变量杂谈
http://nginx.org/en/docs/http/ngx_http_core_module.html#variables nginx的http_core_module模块中的内置变量