view src/pages/blog_new/page_meta.py @ 985:64826e69f365

pages: cache mechanism, first draft: a cache mechanism has been implemented to retrieve pages with a complexe rendering and/or calling expensive methods (e.g. network calls). For now it's is done only for Pubsub and with service profile (i.e. profile used when user is not logged in). When a LiberviaPage use cache, node is subscribed, and as long as no event is received (even can be item update, item retraction, or node deletion), the cached page is returned. This is a first draft, it is planed to handle in the future logged users (which can be tricky as we must not let (un)subscribed node if user is not willing to), multi-nodes pages (e.g.: item + comments) and cache for page not depending on pubsub (e.g. chat).
author Goffi <goffi@goffi.org>
date Sun, 19 Nov 2017 17:18:14 +0100
parents 96a56856d357
children d042f194624a
line wrap: on
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#!/usr/bin/env python2.7
# -*- coding: utf-8 -*-

from libervia.server.constants import Const as C
from twisted.internet import defer
from twisted.words.protocols.jabber import jid
from sat.tools.common import data_objects

access = C.PAGES_ACCESS_PUBLIC  # can be a callable
template = u"blog/articles.html"

@defer.inlineCallbacks
def parse_url(self, request):
    try:
        prof_requested = self.nextPath(request)
    except IndexError:
        self.pageError(request)

    template_data = request.template_data

    target_profile = yield self.host.bridge.profileNameGet(prof_requested)
    template_data[u'target_profile'] = target_profile
    target_jid = yield self.host.bridge.asyncGetParamA('JabberID', 'Connection', 'value', profile_key=target_profile)
    target_jid = jid.JID(target_jid).userhost()
    template_data[u'target_jid'] = target_jid


@defer.inlineCallbacks
def prepare_render(self, request):
    target_jid = request.template_data[u'target_jid']
    blog_data = yield self.host.bridge.mbGet(
                          target_jid,
                          "",
                          10,
                          [],
                          {},
                          C.SERVICE_PROFILE)
    request.template_data[u'items'] = data_objects.BlogItems(blog_data)