Topic: mod_sed 1.0.2 available :: input/output content filter

[Steffen]

Module mod_sed by Basant Kukreja (Sun Microsystems) is now available at the Apache Download page.

Basant has now also a blog, see http://blogs.sun.com/basant/entry/using_mod_sed_to_filter

Updated on 21 September 2008 to version 1.0.2.

Changes between 1.0.1 and 1.0.2

Fixed following 3 types of warnings :
* warning: array subscript has type 'char'
* warning: suggest parentheses around assignment used as truth value
* warning C4018: '<' : signed/unsigned mismatch


Enjoy,

Steffen


What is mod_sed
Mod_sed is a in-process content filter. It can be used with any content whether it is static or dynamic, it doesn't matter. So it will work with html,php, cgi, perl etc.

Unlike its predecessors, like line_edit, it can filter input as well as output, one can filter the POST data too with it. So php input content could also be filtered by mod_sed.

See also the blog from Nick at http://bahumbug.wordpress.com/2008/04/28/sed-in-apache/

Examples

Adding a output (response) filter
<Directory "/htdocs/tested">
AddOutputFilter Sed html
OutputSed "s/california/CA/g"
OutputSed "s/washington/WA/g"
</Directory>

The above example will replace the string "california" to "CA" and "washington" to "WA" in all html docs in testsed directory before sending to client.

Adding a input (request) filter
Following example adds a input filter to php cgi scripts. Sed scripts will be executed for any POST data to php files.
<Directory "/apache2/cgi-bin">
AddInputFilter Sed php
InputSed "s/california/CA/g"
</Directory>

In the above example, if POST (or even GET in HTTP/1.1) data (not the headers) contains the string "california" then it is replaced with string "CA" before the post data is made available to php script.

[admin]

Updated today to version 1.0.2

Steffen

[sebastian]

What does this mean:
httpd: Syntax error on line 29 of /etc/httpd/httpd.conf: Cannot load /usr/lib/apache2/mod_sed.so into server: /usr/lib/apache2/mod_sed.so: invalid ELF header
?

I guess linux and windows version of the same .so module is not compatible, so could someone compile the mod_sed.so for linux for me?

[James Blond]

Yepp, you are right windows modules are different. Can't you compile it yourself?

Source is http://src.opensolaris.org/source/xref/webstack/mod_sed/

To compile the mod_sed, use the apxs tool provided by apache :