Algorithm for finding and replacing URLs with hyperlinks

[Morten W. Petersen]

Peter Hansen wrote:
> "Morten W. Petersen" wrote:
> 
>>Does anyone have a snippet of code that'll replace for example
>>http://www.python.org with <a href="http://www.python.org"
>> >http://www.python.org</a>?
> 
> 
> How perfect do you want it?  Various packages include regular
> expression patterns which match URLs, although some are better
> than others.  The one in an older version of ZWiki which I 
> checked, for example, looks like this:
> 
>  urlchars         = r'[A-Za-z0-9/:@_%~#=&\.\-\?]+'
>  url              = r'["=]?((http|ftp|mailto|file):%s)' % (urlchars)
> 
> ...but unfortunately that means it will be confused if you try
> to put the URL at the end of a sentence like this http://www.python.org.

OK, I managed to make a function for replacing URLs with hyperlinks,
see attached code.  Thanks!  :)

-Morten


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