[Zope3-Users] Virtual hosting problem

[Martijn Pieters]

On 8/30/06, Lorenzo Gil Sanchez <lgs at sicem.biz> wrote:
> I guess I need to slightly change Zope publishing mechanism and I saw
> IVirtualHostRoot in zope.publisher.interfaces.http. Probably calling
> setVirtualHostRoot when the traversal is at 'site_folder' is what I need
> but I have no clue about where should I do that.

You could register an event listener for
zope.app.publication.interfaces.IBeforeTraverseEvent, and manipulate
the request if event.object implements
zope.app.folder.interfaces.IRootFolder. You'll need a hack to find the
request though; you can get it from the security interaction:

from zope.publisher.interfaces.http import IHTTPRequest
from zope.security.management import getInteraction

def _getHTTPRequest():
    """Attempt to get the current request, if it exists"""
    interaction = getInteraction()
    if not interaction.participations:
        return
    for participant in interaction.participations:
        if IHTTPRequest.providedBy(participant):
            return participant

That way you can detect the start of a request (before traverse event
on the root folder), grab the request, and manipulate it to suit your
virtual host needs.

-- 
Martijn Pieters