[Zope] Re: Simple way to obfuscate email addresses to foil spambots?

[Erik Myllymaki]

----- Original Message ----- 
From: "Josef Albert Meile" <jmeile at hotmail.com>
To: <zope at zope.org>
Sent: Friday, September 12, 2003 9:35 AM
Subject: [Zope] Re: Simple way to obfuscate email addresses to foil
spambots?


> >Does anyone have any suggestions as the best way to, within Zope,
> >obfuscate email addresses such that, when passed an email, a script
> >obfuscates it from being picked up by email-address
> >collecting robots?
> >
> >Or any other creative anti-spam tricks.. I work at an educational
> >nonprofit and our spam load seems to be increasing exponentially..
>
> In the past, I was using a Javascript that I translated to
> python:
> http://www.zope.org/Members/jmeile/email%20encoder
>
> But for some reason it shows the real address on the html source on
> netscape 4.x under zope. Without zope, the javascript works perfect
> also in netscape 4.x.
>
> Anyway, now I'm using this on the body of my pages:
>
> <script language="JavaScript">jemail("username","domain","");</script>
>
> or
>
> <script
> language="JavaScript">jemail("username","domain","linkText");</script>
>
> If you use the first call, then the text of the email link will be the
> e-mail
> address. The second one allows you to specify a text, ie: 'Contact us'.
>
> And the javascript code is:
>
> function jemail(user, domain, text){
>   if (text=='')
>     document.write('<a href="'+'mailto:'+user+'@'+domain+'">'+user+'@'
> +domain+'</a>')
>   else
>     document.write('<a href="'+'mailto:'+user+'@'+domain+'">'+text+'</a>')
> }
>
> You can combine it with dtml like this:
>
> def splitMail(myEmail):
>   return myEmail.split('@')
>
> Then:
>
> <dtml-let splitedMail="splitMail(myEmail)" username="myEmail[0]"
> domain="myEmail[1]">
> <script
>
language="JavaScript">jemail("&dtml-username;","&dtml-domain;","linkText");<
/script>
> </dtml/let>
>
> And if you are using Zclasses or python Classes, then you can store
> the encoded email as an attribute and you won't have to write the
> ugly and long code again.
>
> I'd like to use zpt, but I haven't had time to think about it.
>
> Regards,
> Josef

Make a Python Script called antispam(stolen from HTMLgen.py):

parameters: address
---------------------------------------------------
import string
from whrandom import choice

buffer = map(None, address)
for i in range(0, len(address), choice((2,3,4))):
    buffer[i] = '&#%d;' % ord(buffer[i])

return string.join(buffer,'')
---------------------------------------------------

on your pages, use mailtos like this:

<a href=mailto:<dtml-var expr="antispam('myname at mydomain.com')"> >My
Name</a>