charlie at begeistert
Feb 9, 2009, 2:12 AM
Views: 640
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Hi,
I've written a very simple view for concactenating resources such as
CSS or Javascript files to reduce the number of http browser requests:
from Products.CMFCore.utils import getToolByName
from Products.CMFDefault.browser.utils import memoize, ViewBase
class Javascript(ViewBase):
"""Return all Javascript from the skin as a single string"""
folder_name = 'js'
content_type = 'application/x-javascript'
@memoize
def contents(self):
skin_tool = getToolByName(self.context, 'portal_skins')
layer = skin_tool.getDefaultSkin()
skin = skin_tool.getSkinByName(layer)
folder = getattr(skin, self.folder_name)
obs = [str(ob) for ob in folder.objectValues()
if ob.meta_type == "Filesystem File"]
return "\n".join(obs)
def __call__(self):
data = self.contents()
self.request.response.setHeader("Content-Type",
self.content_type)
self.request.response.setHeader("Content-Length", len(data))
self.request.response.write(data)
While this works fine, it seems to run considerably slower (about half
the speed) than a PythonScript that calls the relevant objects
explicitly via getattr(context, id). I'm a bit surprised at this but
suspect it may down to whether the file system is actually accessed or
whether a persistent object is being called. In my browser view it is
impossible to avoid reading in the file again as this happens the
__str__ method of the FSFile object.
In the hope of enlightenment.
Charlie
--
Charlie Clark
Helmholtzstr. 20
Düsseldorf
D- 40215
Tel: +49-211-938-5360
GSM: +49-178-782-6226
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Accessing skins objects
