Synopsis

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.

Example:

location / {
  sub_filter      </head>
  '</head><script language="javascript" src="$script"></script>';
  sub_filter_once on;
}

Directives

sub_filter

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_once

sub_filter_once off allows to search and replace all matching lines, the default is replacing only the first one.

sub_filter_types

sub_filter_types is used to specify which content types should be checked for sub_filter. The default is only text/html.

References

Original Documentation