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.NET Forum / .NET Framework / Scripting / September 2004

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Validating a valid URL

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Shabam - 29 Sep 2004 12:38 GMT
Is there a function that validates if a URL is valid or not?  Basically I'm
trying to filter out bogus input, and things like cross site scripting
attacks.

Example:
<img src="javascript:alert(document.cookie)">

Doing it by regex seems way too complicated and there could be holes in the
logic if something is missed.
Cor Ligthert - 29 Sep 2004 15:38 GMT
Shabam,

Your question is not new in dotnet Newsgroups, I did a search on Google
here are some, sorry using regex.

http://tinyurl.com/69yyr

When that does not fit, I would ask it as well crossposted as you already
did in the newsgroups.
Microsoft.public.dotnet.languages.vb (or csharp) according what you use
and
Microsoft.public.dotnet.framework.aspnet

I hope this helps?

Cor

"Shabam" <blislecp@hotmail.com> > Is there a function that validates if a
URL is valid or not?  Basically I'm
> trying to filter out bogus input, and things like cross site scripting
> attacks.
[quoted text clipped - 5 lines]
> the
> logic if something is missed.

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