[Zope-CMF] How to make your CMF portal "Members Only"

[Ben Gustafson]

After finding some sketchy documentation on cmf.zope.org about how to make a
"members-only" CMF portal, I decided to roll my own method with a little
DTML, ZPT and an External Method. The methodology I followed is: Redirect
anonymous visitors to the Login form (unless they're already on that page);
disable the Join link and action; and do not display the Actions box for
anonymous visitors. Below is the code if you'd like to do this yourself.

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1) Add this DTML to the top of
CMFDefault/skins/generic/standard_html_header.dtml:

<dtml-if "portal_membership.isAnonymousUser()">
 <dtml-let strURLBASE3="REQUEST.BASE3">
  <dtml-if "not strURLBASE3.endswith('login_form')">
   <dtml-let strURL="_.string.join([REQUEST.BASE2, 'login_form'], '/')">
    <dtml-call expr="RESPONSE.redirect(strURL)">
   </dtml-let>
  </dtml-if>
 </dtml-let>
</dtml-if>

2) Surround the <dtml-var actions_box> tag with this dtml-if statement:

<dtml-if "not portal_membership.isAnonymousUser()">
  <dtml-var actions_box>
</dtml-if>

3) Add this span tag to CMFDefault/skins/zpt_generic/main_template.pt:

<span tal:condition="isAnon"
	tal:define="strURL request/URL;
	loginForm string:${portal_url}/login_form"
	tal:replace="python:here.doRedirect(loginForm, strURL)">Log in</span>

4) Add this condition to the actions box table tag (marked with <!-- actions
box --> above it):

	tal:condition="not:python:isAnon"

5) Create an External Method with the following function:

	def doRedirect(newURL, presentURL):
		"""Redirect to newURL if it is not the same as presentURL"""
		if (newURL != presentURL):
			raise 'Redirect', newURL

6) In portal_registration, under the Actions tab, uncheck the Join action's
Visible? checkbox.
------------

Simple? Simple.

--Ben