[python-uk] Favourite ways of scrubbing HTML/whitelisting specific HTML tags?

Michael Foord fuzzyman at voidspace.org.uk
Thu Feb 7 18:43:36 CET 2008

Jon Ribbens wrote:
> On Thu, Feb 07, 2008 at 02:35:29PM +0000, Michael Sparks wrote:
>> Just a quick Q for people: what's your favourite way (preferably a library :) 
>> of allowing a subset of HTML tags through? I can think of 1/2 dozen different 
>> ways of doing this, but I'm sure there's a preferred approach for some...
> Be aware that if you are doing this for security reasons (e.g. to
> prevent cross-site scripting), it is very hard to get right.
> The code at
> http://www.voidspace.org.uk/python/weblog/arch_d7_2005_04_23.shtml#e35
> is wrong, for example.

I take no responsibility for anything I did two years ago. ;-)

That aside, what *is* wrong with it. (I know nothing about XSS nor was 
that my concern - but I am interested).


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