I blogged about mod_sed a couple of months ago.  At the time, I think I explained in outline why it’s an advance on its predecessors, including mod_line_edit and mod_substitute.  But one key part was missing: any discussion of how to take advantage of sed’s capabilities, beyond the simple string or regexp search-and-replace of the earlier modules.  That matters because few of us are power-users of sed who know what we can do with it, and even those who are may not realise how original-sed translates to mod_sed.

Now Basant has filled that gap, with a blog entry describing advanced usage.  He shows a range of programmatic usage of sed within the filter, starting with branches and conditionals, and moving on to block-structuring and advanced buffer manipulation.  For those who want advanced text manipulation in an Apache filter, this is a great kick-start to learning what sed can do for you.


Posted on August 16, 2008, in apache. Bookmark the permalink. Leave a comment.

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