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
'';
sub_filter_once on;
} 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.
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.
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.