+
−"""base xml and rss views
+
−
+
−
+
−:organization: Logilab
+
−:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+
−:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
+
−"""
+
−__docformat__ = "restructuredtext en"
+
−
+
−from time import timezone
+
−
+
−from logilab.mtconverter import xml_escape
+
−
+
−from cubicweb.view import EntityView, AnyRsetView
+
−from cubicweb.web.httpcache import MaxAgeHTTPCacheManager
+
−from cubicweb.common.uilib import simple_sgml_tag
+
−
+
−
+
−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(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)
+
−    
+
−
+
−class RssView(XmlView):
+
−    id = 'rss'
+
−    title = _('rss')
+
−    templatable = False
+
−    content_type = 'text/xml'
+
−    http_cache_manager = MaxAgeHTTPCacheManager
+
−    cache_max_age = 60*60*2 # stay in http cache for 2 hours by default 
+
−    
+
−    def cell_call(self, row, col):
+
−        self.wview('rssitem', self.rset, row=row, col=col)
+
−        
+
−    def call(self):
+
−        """display a list of entities by calling their <item_vid> view"""
+
−        req = self.req
+
−        self.w(u'<?xml version="1.0" encoding="%s"?>\n' % req.encoding)
+
−        self.w(u'''<rdf:RDF
+
− xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+
− xmlns:dc="http://purl.org/dc/elements/1.1/"
+
− xmlns="http://purl.org/rss/1.0/"
+
−>''')
+
−        self.w(u'  <channel rdf:about="%s">\n' % xml_escape(req.url()))
+
−        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)))
+
−        self.w(u'    <items>\n')
+
−        self.w(u'      <rdf:Seq>\n')
+
−        for entity in self.rset.entities():
+
−            self.w(u'      <rdf:li resource="%s" />\n' % xml_escape(entity.absolute_url()))
+
−        self.w(u'      </rdf:Seq>\n')
+
−        self.w(u'    </items>\n')
+
−        self.w(u'  </channel>\n')
+
−        for i in xrange(self.rset.rowcount):
+
−            self.cell_call(i, 0)
+
−        self.w(u'</rdf:RDF>')
+
−
+
−
+
−class RssItemView(EntityView):
+
−    id = 'rssitem'
+
−    date_format = '%%Y-%%m-%%dT%%H:%%M%+03i:00' % (timezone / 3600)
+
−
+
−    def cell_call(self, row, col):
+
−        entity = self.complete_entity(row, col)
+
−        self.w(u'<item rdf:about="%s">\n' % xml_escape(entity.absolute_url()))
+
−        self._marker('title', entity.dc_long_title())
+
−        self._marker('link', entity.absolute_url())
+
−        self._marker('description', entity.dc_description())
+
−        self._marker('dc:date', entity.dc_date(self.date_format))
+
−        if entity.creator:
+
−            self.w(u'<author>')
+
−            self._marker('name', entity.creator.name())
+
−            email = entity.creator.get_email()
+
−            if email:
+
−                self._marker('email', email)
+
−            self.w(u'</author>')
+
−        self.w(u'</item>\n')
+
−        
+
−    def _marker(self, marker, value):
+
−        if value:
+
−            self.w(u'  <%s>%s</%s>\n' % (marker, xml_escape(value), marker))