"""base xml and rss views
:organization: Logilab
:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
"""
__docformat__ = "restructuredtext en"
_ = unicode
from time import timezone
from logilab.mtconverter import xml_escape
from cubicweb.selectors import non_final_entity, one_line_rset, appobject_selectable
from cubicweb.view import EntityView, AnyRsetView, Component
from cubicweb.common.uilib import simple_sgml_tag
from cubicweb.web import httpcache, box
# base xml views ##############################################################
class XMLView(EntityView):
"""xml view for entities"""
id = 'xml'
title = _('xml')
templatable = False
content_type = 'text/xml'
xml_root = 'rset'
item_vid = 'xmlitem'
def cell_call(self, row, col):
self.wview(self.item_vid, self.rset, row=row, col=col)
def call(self):
"""display a list of entities by calling their <item_vid> view"""
self.w(u'<?xml version="1.0" encoding="%s"?>\n' % self.req.encoding)
self.w(u'<%s size="%s">\n' % (self.xml_root, len(self.rset)))
for i in xrange(self.rset.rowcount):
self.cell_call(i, 0)
self.w(u'</%s>\n' % self.xml_root)
class XMLItemView(EntityView):
id = 'xmlitem'
def cell_call(self, row, col):
""" element as an item for an xml feed """
entity = self.complete_entity(row, col)
self.w(u'<%s>\n' % (entity.e_schema))
for rschema, attrschema in entity.e_schema.attribute_definitions():
attr = rschema.type
try:
value = entity[attr]
except KeyError:
# Bytes
continue
if value is not None:
if attrschema == 'Bytes':
from base64 import b64encode
value = '<![CDATA[%s]]>' % b64encode(value.getvalue())
elif isinstance(value, basestring):
value = xml_escape(value)
self.w(u' <%s>%s</%s>\n' % (attr, value, attr))
self.w(u'</%s>\n' % (entity.e_schema))
class XMLRsetView(AnyRsetView):
"""dumps raw rset as xml"""
id = 'rsetxml'
title = _('xml export')
templatable = False
content_type = 'text/xml'
xml_root = 'rset'
def call(self):
w = self.w
rset, descr = self.rset, self.rset.description
eschema = self.schema.eschema
labels = self.columns_labels(tr=False)
w(u'<?xml version="1.0" encoding="%s"?>\n' % self.req.encoding)
w(u'<%s query="%s">\n' % (self.xml_root, xml_escape(rset.printable_rql())))
for rowindex, row in enumerate(self.rset):
w(u' <row>\n')
for colindex, val in enumerate(row):
etype = descr[rowindex][colindex]
tag = labels[colindex]
attrs = {}
if '(' in tag:
attrs['expr'] = tag
tag = 'funccall'
if val is not None and not eschema(etype).is_final():
attrs['eid'] = val
# csvrow.append(val) # val is eid in that case
val = self.view('textincontext', rset,
row=rowindex, col=colindex)
else:
val = self.view('final', rset, displaytime=True,
row=rowindex, col=colindex, format='text/plain')
w(simple_sgml_tag(tag, val, **attrs))
w(u' </row>\n')
w(u'</%s>\n' % self.xml_root)
# RSS stuff ###################################################################
class RSSFeedURL(Component):
id = 'rss_feed_url'
__select__ = non_final_entity()
def feed_url(self):
return self.build_url(rql=self.limited_rql(), vid='rss')
class RSSEntityFeedURL(Component):
id = 'rss_feed_url'
__select__ = non_final_entity() & one_line_rset()
def feed_url(self):
return self.rset.get_entity(0, 0).rss_feed_url()
class RSSIconBox(box.BoxTemplate):
"""just display the RSS icon on uniform result set"""
id = 'rss'
__select__ = (box.BoxTemplate.__select__
& appobject_selectable('components', 'rss_feed_url'))
visible = False
order = 999
def call(self, **kwargs):
try:
rss = self.req.external_resource('RSS_LOGO')
except KeyError:
self.error('missing RSS_LOGO external resource')
return
urlgetter = self.vreg['components'].select('rss_feed_url', self.req,
rset=self.rset)
url = urlgetter.feed_url()
self.w(u'<a href="%s"><img src="%s" alt="rss"/></a>\n' % (xml_escape(url), rss))
class RSSView(XMLView):
id = 'rss'
title = _('rss')
templatable = False
content_type = 'text/xml'
http_cache_manager = httpcache.MaxAgeHTTPCacheManager
cache_max_age = 60*60*2 # stay in http cache for 2 hours by default
def _open(self):
req = self.req
self.w(u'<?xml version="1.0" encoding="%s"?>\n' % req.encoding)
self.w(u'<rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/">\n')
self.w(u' <channel>\n')
self.w(u' <title>%s RSS Feed</title>\n'
% xml_escape(self.page_title()))
self.w(u' <description>%s</description>\n'
% xml_escape(req.form.get('vtitle', '')))
params = req.form.copy()
params.pop('vid', None)
self.w(u' <link>%s</link>\n' % xml_escape(self.build_url(**params)))
def _close(self):
self.w(u' </channel>\n')
self.w(u'</rss>')
def call(self):
"""display a list of entities by calling their <item_vid> view"""
self._open()
for i in xrange(self.rset.rowcount):
self.cell_call(i, 0)
self._close()
def cell_call(self, row, col):
self.wview('rssitem', self.rset, row=row, col=col)
class RSSItemView(EntityView):
id = 'rssitem'
date_format = '%%Y-%%m-%%dT%%H:%%M%+03i:00' % (timezone / 3600)
add_div_section = False
def cell_call(self, row, col):
entity = self.complete_entity(row, col)
self.w(u'<item>\n')
self.w(u'<guid isPermaLink="true">%s</guid>\n'
% xml_escape(entity.absolute_url()))
self.render_title_link(entity)
self._marker('description', entity.dc_description(format='text/html'))
self._marker('dc:date', entity.dc_date(self.date_format))
self.render_entity_creator(entity)
self.w(u'</item>\n')
def render_title_link(self, entity):
self._marker('title', entity.dc_long_title())
self._marker('link', entity.absolute_url())
def render_entity_creator(self, entity):
if entity.creator:
self._marker('dc:creator', entity.dc_creator())
def _marker(self, marker, value):
if value:
self.w(u' <%s>%s</%s>\n' % (marker, xml_escape(value), marker))