filter html-tags, but not all...

[Lasse Edsvik]

Hello

I was wondering if you guys could help me. im building a small messageboard
and i want to filter all html-tags except these ones:

<b> <i> <img.........> <font....>

how to build such a reg exp pattern?

TIA
/Lasse

[Ray at]

I ~guess~ this non-regular expression may work:


sPost = Request.Form("TheTextArea")
sPost = Replace(sPost, "<", "&lt;")
sPost = Replace(sPost, "&lt;b>", "<b>")
sPost = Replace(sPost, "&lt;/b>", "</b>")
sPost = Replace(sPost, "&lt;i>", "<i>")
sPost = Replace(sPost, "&lt;/i>", "</i>")
sPost = Replace(sPost, "&lt;img", "<img")
sPost = Replace(sPost, "&lt;font", "<font")
sPost = Replace(sPost, "&lt;/font>", "</font>")


If I got that right, it'll replace all the <'s with &lt;'s, and then go back
and re-replace the <b, <i, <img, <font and they're closing equivalents.
This will still leave > everywhere, but that shouldn't matter. I'm sure
there is a more robust solution out there, anyway.

Ray at work

"Lasse Edsvik" <lasse@nospam.com> wrote in message
news:OKaELmInDHA.2216@TK2MSFTNGP12.phx.gbl...

> Hello
>
> I was wondering if you guys could help me. im building a small

messageboard

> and i want to filter all html-tags except these ones:
>
> <b> <i> <img.........> <font....>
>
> how to build such a reg exp pattern?
>
> TIA
> /Lasse
>
>

[Lasse Edsvik]

hmm, i was hoping for a reg.exp solution

/Lasse


"Ray at <%=sLocation%>" <myfirstname at lane34 dot com> wrote in message
news:uz42k8JnDHA.3700@TK2MSFTNGP11.phx.gbl...

> I ~guess~ this non-regular expression may work:
>
>
> sPost = Request.Form("TheTextArea")
> sPost = Replace(sPost, "<", "&lt;")
> sPost = Replace(sPost, "&lt;b>", "<b>")
> sPost = Replace(sPost, "&lt;/b>", "</b>")
> sPost = Replace(sPost, "&lt;i>", "<i>")
> sPost = Replace(sPost, "&lt;/i>", "</i>")
> sPost = Replace(sPost, "&lt;img", "<img")
> sPost = Replace(sPost, "&lt;font", "<font")
> sPost = Replace(sPost, "&lt;/font>", "</font>")
>
>
> If I got that right, it'll replace all the <'s with &lt;'s, and then go

back

> and re-replace the <b, <i, <img, <font and they're closing equivalents.
> This will still leave > everywhere, but that shouldn't matter. I'm sure
> there is a more robust solution out there, anyway.
>
> Ray at work
>
> "Lasse Edsvik" <lasse@nospam.com> wrote in message
> news:OKaELmInDHA.2216@TK2MSFTNGP12.phx.gbl...

> > Hello
> >
> > I was wondering if you guys could help me. im building a small

> messageboard

> > and i want to filter all html-tags except these ones:
> >
> > <b> <i> <img.........> <font....>
> >
> > how to build such a reg exp pattern?
> >
> > TIA
> > /Lasse
> >
> >

>
>

[Bob Barrows]

Lasse Edsvik wrote:

> hmm, i was hoping for a reg.exp solution
>

Patience. Chris (Hohmann) usually doesn't start posting this early in the
day. ;-)

If you're really impatient, you may want to Google this group for some of
Chris' RegExp posts that may help you figure it out for yourself...

Bob Barrows

--
Microsoft MVP -- ASP/ASP.NET
Please reply to the newsgroup. The email account listed in my From
header is my spam trap, so I don't check it very often. You will get a
quicker response by posting to the newsgroup.

[Evertjan.]

Lasse Edsvik wrote on 27 okt 2003 in
microsoft.public.inetserver.asp.general:

> I was wondering if you guys could help me. im building a small
> messageboard and i want to filter all html-tags except these ones:
>
> <b> <i> <img.........> <font....>
>
> how to build such a reg exp pattern?

This answer is in [serverside-asp ;-)] Jscript
and supposes you also want to keep </b>, </i>, etc.


// replace the < of those 8 with ##&##
t = t.replace(/<{1}?(?=\/?(b|i|img|font)( |>))/g,"##&##")

// replace all other tags with a space
t = t.replace(/<[^>]+>/g," ")

// replace all ##&## back to <
t = t.replace(/##&##/g,"<")

=========================

// all in one single line:
t = t.replace(/<{1}?(?=\/?(b|i|img|font)( |>))/g,"##&##").replace(/<[^>]
+>/g," ").replace(/##&##/g,"<")





--
Evertjan.
The Netherlands.
(Please change the x'es to dots in my emailaddress)