### HttpSubstitution This module can search and replace text in the nginx response. It is only available if the ~~~ --with-http_sub_module option ~~~ was specified for ./configure. 本模块可以在nginx的回应中查找和替换文本.在编译nginx时必需加上--with-http_sub_module option 例如: ~~~ location / { sub_filter </head> '</head><script language="javascript" src="$script"></script>'; sub_filter_once on; } ~~~ ### 指令 ### sub_filter **syntax:***sub_filter text substitution* **default:***none* **context:***http, server, location* *sub_filter* allows replacing some text in the nginx response with some other text, independently of the source of the data. The matching is case-insensitive. Substitution text may contain variables. Only one substitution rule per location is supported. *sub_filter* 允许替换源文件里的多个文本（多次替换）匹配是非常快速的。替换必须包含变量，一个location只能一个替换规则. ### sub_filter_once **syntax:***sub_filter_once on|off* **default:***sub_filter_once on* **context:***http, server, location* *sub_filter_once off* allows to search and replace all matching lines, the default is replacing only the first one. *sub_filter_once off* 允许查找替换所有匹配行，默认只替换第一个. ### sub_filter_types **syntax:***sub_filter_types mime-type [mime-type ...]* **default:***sub_filter_types text/html* **context:***http, server, location* *sub_filter_types* is used to specify which content types should be checked for *sub_filter*. The default is only *text/html*. *sub_filter_types*用于指定替换*sub_filter*的类型，默认为*text/html*. ### References [Original Documentation](http://sysoev.ru/nginx/docs/http/ngx_http_sub_module.html "http://sysoev.ru/nginx/docs/http/ngx_http_sub_module.html")