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Apache Module mod_substitute

Description:	Perform search and replace operations on response bodies
Status:	Extension
Module Identifier:	substitute_module
Source File:	mod_substitute.c
Compatibility:	Available in Apache 2.2.7 and later

Summary

mod_substitute provides a mechanism to perform both regular expression and fixed string substitutions on response bodies.

Directives

Substitute Directive

Description:	Pattern to filter the response content
Syntax:	`Substitute s/pattern/substitution/[infq]`
Context:	directory, .htaccess
Override:	FileInfo
Status:	Extension
Module:	mod_substitute

The Substitute directive specifies a search and replace pattern to apply to the response body.

The meaning of the pattern can be modified by using any combination of these flags:

i: Perform a case-insensitive match.
n: By default the pattern is treated as a regular expression. Using the n flag forces the pattern to be treated as a fixed string.
f: The f flag causes mod_substitute to flatten the result of a substitution allowing for later substitutions to take place on the boundary of this one. This is the default.
q: The q flag causes mod_substitute to not flatten the buckets after each substitution. This can result in much faster response and a decrease in memory utilization, but should only be used if there is no possibility that the result of one substitution will ever match a pattern or regex of a subsequent one.

Example

<Location /> AddOutputFilterByType SUBSTITUTE text/html Substitute s/foo/bar/ni </Location>

If either the pattern or the substitution contain a slash character then an alternative delimiter should be used:

Example of using an alternate delimiter

<Location /> AddOutputFilterByType SUBSTITUTE text/html Substitute "s|<BR */?>|<br />|i" </Location>

SubstituteInheritBefore Directive

Description:	Change the merge order of inherited patterns
Syntax:	`SubstituteInheritBefore on\|off`
Default:	`SubstituteInheritBefore off`
Context:	directory, .htaccess
Override:	FileInfo
Status:	Extension
Module:	mod_substitute
Compatibility:	Available in httpd 2.2.32 and later

Whether to apply the inherited Substitute patterns first (on), or after the ones of the current context (off). SubstituteInheritBefore is itself inherited, hence contexts that inherit it (those that don't specify their own SubstituteInheritBefore value) will apply the closest defined merge order.