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Website URL validation

a quick one. i have a form where users can enter a web address. a link to their own website to be exact. users tend to enter all sorts of wrong things. so i need it to format it into the correct format.

ie:  somepeople might enter these:

1. <a href="www.mysite.com">mysite.com</a>
2. http://www.mysite.com

i need it to format that input, and insert into the database the correct info in this format:

www.mysite.com

whats the easiest or best way to do this?


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M_Corkish
Asked:
M_Corkish
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1 Solution
 
meverestCommented:
Somthing like:

<cfset fixedurl=ReReplace("#form.url#", "[^""/]*/*([^"" ])", "/1")>
<cfoutput>#fixedurl#</cfoutput>

?

if it doesn't work (likely!), i'll need to do some more work on my regex and try again!  :-}

cheers.
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M_CorkishAuthor Commented:
Hmm, it doesn't quite work properly.. it spits out "/1" quite often. if you enter:

<a href="www.mysite.com">mysite.com</a>

it brings back:

/1"www.mysite.com">mysite.com

================
here is the full page i tested it on:

<cfif isdefined("form.url")>

<cfset fixedurl=ReReplace("#form.url#", "[^""/]*/*([^"" ])", "/1")>
<cfoutput>#fixedurl#</cfoutput>

</cfif>

<form action="test.cfm" method="post">
URL:
<input type="text" name="url">
<input type="submit" value="submit">

</form
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slingleCommented:
This isn't some long logical solution, but...  What I always do is put http:// as a label in front of the input field.  99.9% of the time, this keeps the user from entering the http (or html) in the field.  That way you get only the url and you control how it goes in your db.  

example:

<p>http://<input type="text" name="url"><br>
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slingleCommented:
well i forgot experts exchange autmatically links urls so let me try my example again:

&lt;p&gt;http://<input type="text" name="url"&gt;&lt;br&gt;
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M_CorkishAuthor Commented:
yeah, i have that.. but in the first day of running the site, people got it wrong.. even after saying "http://"

some people also try to enter <A href="www.mysite.com">mysite.com</a> on other comments and messages they post? is their a good way to deal with this?

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jimmy282Commented:
This works :-)

<cfset OriginalString = "http://the-whizkids.com">

Or

<Cfset OriginalString = "<a href=""http://the-whizkids.com""></a>">

Or

<cfset OriginalString = "the-whizkids.com">

<CFSCRIPT>
       OriginalString = ReReplaceNocase(OriginalString,"<a[^h]*href=""?([^"" ]*)""?[^>]*>([^<]*)</A>",
"\2","ALL");

OriginalString = ReRePlaceNoCase(OriginalString,"^(http|ftp|https)://","");

  </CFSCRIPT>

  <cfoutput>
  #OriginalString#  
  </cfoutput>
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jimmy282Commented:
THIS
<Cfset OriginalString = "<a href=""http://the-whizkids.com""></a>">
should have been
<Cfset OriginalString = "<a  href=""http://the-whizkids.com"">the-whizkids.com</a>">

Jimmy
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M_CorkishAuthor Commented:
Jimmy, it looks good, I changed the second example from:

<Cfset OriginalString = "<a href=""http://the-whizkids.com""></a>">

to:

<Cfset OriginalString = '<a href=""http://the-whizkids.com""></a>'>


substituting the double quotes for the single one. as it didn't work, due to the fact do body would actually enter in href=""www.blah.com"". using the single one works however in that case.

Thanks for the good stuff.  So what exact are the ReReplaceNoCase functions all about?  and the \2  for? and such?

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jimmy282Commented:
These are Regualr Expressions.
Perl is the langauge which handles them best and CF really handles hem very differently. They are available in all languages though. ASP,PHP,CF, Java etc.

\2 means that the second match from the pattern found by the regular expression ","<a[^h]*href=""?([^"" ]*)""?[^>]*>([^<]*)</A>" which actually is the content between the starting and closing A tags.

HTH
Jimmy
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M_CorkishAuthor Commented:
Cool, thanks for everything... ;-) i'm gonna have a look into that function now that i know where to start.

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jimmy282Commented:
Thanks for the points.
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M_CorkishAuthor Commented:
no worries! hey, i just checked out your site.. 8) must really enjoy helping others out. it's good to see. ;-)

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meverestCommented:
sorry - got my '\' and '/' mixed up! i knew i would ... ;-)

cheers.
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