[Zope] Name error cookie check

[Dieter Maurer]

Nico de Boer writes:
 > Hai all,
 > 
 > I'm having a problem with a site. I want to check for user agent, and
 > if the visitor uses MSIE, Netscape or Mozilla set a cookie
 > 'showflash'. This is for the flash site. The other user agents have to
 > go to the html-site. This is my code:
 > 
 > <dtml-call "REQUEST.set('ua',HTTP_USER_AGENT)">
 > <dtml-if "(_.string.find(ua,'Mozilla')<0 and _.string.find(ua,'Netscape')<0 and  _.string.find(ua,'MSIE')<0) or showflash">
 > <dtml-var standard_html_header><dtml-var main><dtml-var standard_html_footer>
 > <dtml-else>
 > <dtml-call "RESPONSE.setCookie('showflash','true',path='/')">
 > <dtml-call "RESPONSE.redirect('/flash/')">
 > </dtml-if>
 > 
 > But the first time someone visits the site, there is no cookie set. So
 > I get a name error. Can anyone solve my problem?
Several alternatives:

  *  <dtml-unless showflash><dtml-call "REQUEST.set('showflash',0)"></dtml-unless>

  *  "(_.has_key('showflash') and showflash)" rather than "showflash" alone

  *  ...


Dieter