nginx_substitutions_filter
 *Note: this module is not distributed with the Nginx source.
 Installation instructions can be found below.*
 Description
 nginx_substitutions_filter is a filter module which can do both regular
 expression and fixed string substitutions on response bodies. This
 module is quite different from the Nginx's native Substitution Module.
 It scans the output chains buffer and matches string line by line, just
 like Apache's mod_substitute
 (<http://httpd.apache.org/docs/trunk/mod/mod_substitute.html>).
 Example
 location / {
 subs_filter_types text/html text/css text/xml;
 subs_filter st(\d*).example.com 1ドル.example.com ir;
 subs_filter a.example.com s.example.com;
 }
 Directives
 * subs_filter_types
 * subs_filter
 subs_filter_types
 syntax: *subs_filter_types mime-type [mime-types] *
 default: *subs_filter_types text/html*
 context: *http, server, location*
 *subs_filter_types* is used to specify which content types should be
 checked for *subs_filter*. The default is only *text/html*.
 This module just works with plain text. If the response is compressed,
 it can't uncompress the response and will ignore this response. This
 module can be compatible with gzip filter module. But it will not work
 with proxy compressed response. You can disable the compressed response
 like this:
 proxy_set_header Accept-Encoding "";
 subs_filter
 syntax: *subs_filter source_str destination_str [gior] *
 default: *none*
 context: *http, server, location*
 *subs_filter* allows replacing source string(regular expression or
 fixed) in the nginx response with destination string. Substitution text
 may contain variables. More than one substitution rules per location is
 supported. The meaning of the third flags are:
 * *g*(default): Replace all the match strings.
 * *i*: Perform a case-insensitive match.
 * *o*: Just replace the first one.
 * *r*: The pattern is treated as a regular expression, default is
 fixed string.
 Installation
 To install, get the source with subversion:
 git clone
 git://github.com/yaoweibin/ngx_http_substitutions_filter_module.git
 and then compile nginx with the following option:
 ./configure --add-module=/path/to/module
 Known issue
 *
 CHANGES
 Changes with nginx_substitutions_filter 0.6.0 2012年06月30日
 * refactor this module
 Changes with nginx_substitutions_filter 0.5.2 2010年08月11日
 * do many optimizing for this module
 * fix a bug of buffer overlap
 * fix a segment fault bug when output chain return NGX_AGAIN.
 * fix a bug about last buffer with no linefeed. This may cause segment
 fault. Thanks for Josef Fröhle
 Changes with nginx_substitutions_filter 0.5 2010年04月15日
 * refactor the source structure, create branches of dev
 * fix a bug of small chunk of buffers causing lose content
 * fix the bug of last_buf and the nginx's compatibility above 0.8.25
 * fix a bug with unwanted capture config error in fix string
 substitution
 * add feature of regex captures
 Changes with nginx_substitutions_filter 0.4 2009年12月23日
 * fix many bugs
 Changes with nginx_substitutions_filter 0.3 2009年02月04日
 * Initial public release
 Reporting a bug
 Questions/patches may be directed to Weibin Yao, yaoweibin@gmail.com.