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# Copyright (c) Django Software Foundation and individual contributors.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without modification,
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# are permitted provided that the following conditions are met:
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#
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# 1. Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the following disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# 3. Neither the name of Django nor the names of its contributors may be used
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# to endorse or promote products derived from this software without
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# specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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# ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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"""
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For definitions of the different versions of RSS, see:
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http://web.archive.org/web/20110718035220/http://diveintomark.org/archives/2004/02/04/incompatible-rss
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"""
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import datetime
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import io
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import pytz
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from six.moves.urllib import parse as urlparse
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from rhodecode.lib.feedgenerator import datetime_safe
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from rhodecode.lib.feedgenerator.utils import SimplerXMLGenerator, iri_to_uri, force_text
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#### The following code comes from ``django.utils.feedgenerator`` ####
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def rfc2822_date(date):
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# We can't use strftime() because it produces locale-dependent results, so
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# we have to map english month and day names manually
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months = ('Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec',)
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days = ('Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun')
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# Support datetime objects older than 1900
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date = datetime_safe.new_datetime(date)
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# We do this ourselves to be timezone aware, email.Utils is not tz aware.
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dow = days[date.weekday()]
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month = months[date.month - 1]
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time_str = date.strftime('%s, %%d %s %%Y %%H:%%M:%%S ' % (dow, month))
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offset = date.utcoffset()
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# Historically, this function assumes that naive datetimes are in UTC.
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if offset is None:
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return time_str + '-0000'
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else:
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timezone = (offset.days * 24 * 60) + (offset.seconds // 60)
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hour, minute = divmod(timezone, 60)
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return time_str + '%+03d%02d' % (hour, minute)
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def rfc3339_date(date):
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# Support datetime objects older than 1900
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date = datetime_safe.new_datetime(date)
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time_str = date.strftime('%Y-%m-%dT%H:%M:%S')
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offset = date.utcoffset()
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# Historically, this function assumes that naive datetimes are in UTC.
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if offset is None:
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return time_str + 'Z'
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else:
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timezone = (offset.days * 24 * 60) + (offset.seconds // 60)
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hour, minute = divmod(timezone, 60)
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return time_str + '%+03d:%02d' % (hour, minute)
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def get_tag_uri(url, date):
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"""
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Creates a TagURI.
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See http://web.archive.org/web/20110514113830/http://diveintomark.org/archives/2004/05/28/howto-atom-id
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"""
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bits = urlparse(url)
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d = ''
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if date is not None:
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d = ',%s' % datetime_safe.new_datetime(date).strftime('%Y-%m-%d')
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return 'tag:%s%s:%s/%s' % (bits.hostname, d, bits.path, bits.fragment)
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class SyndicationFeed(object):
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"""Base class for all syndication feeds. Subclasses should provide write()"""
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def __init__(self, title, link, description, language=None, author_email=None,
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author_name=None, author_link=None, subtitle=None, categories=None,
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feed_url=None, feed_copyright=None, feed_guid=None, ttl=None, **kwargs):
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def to_unicode(s):
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return force_text(s, strings_only=True)
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if categories:
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categories = [force_text(c) for c in categories]
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if ttl is not None:
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# Force ints to unicode
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ttl = force_text(ttl)
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self.feed = {
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'title': to_unicode(title),
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'link': iri_to_uri(link),
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'description': to_unicode(description),
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'language': to_unicode(language),
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'author_email': to_unicode(author_email),
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'author_name': to_unicode(author_name),
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'author_link': iri_to_uri(author_link),
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'subtitle': to_unicode(subtitle),
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'categories': categories or (),
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'feed_url': iri_to_uri(feed_url),
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'feed_copyright': to_unicode(feed_copyright),
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'id': feed_guid or link,
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'ttl': ttl,
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}
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self.feed.update(kwargs)
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self.items = []
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def add_item(self, title, link, description, author_email=None,
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author_name=None, author_link=None, pubdate=None, comments=None,
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unique_id=None, unique_id_is_permalink=None, enclosure=None,
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categories=(), item_copyright=None, ttl=None, updateddate=None,
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enclosures=None, **kwargs):
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"""
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Adds an item to the feed. All args are expected to be Python Unicode
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objects except pubdate and updateddate, which are datetime.datetime
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objects, and enclosures, which is an iterable of instances of the
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Enclosure class.
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"""
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def to_unicode(s):
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return force_text(s, strings_only=True)
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if categories:
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categories = [to_unicode(c) for c in categories]
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if ttl is not None:
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# Force ints to unicode
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ttl = force_text(ttl)
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if enclosure is None:
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enclosures = [] if enclosures is None else enclosures
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item = {
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'title': to_unicode(title),
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'link': iri_to_uri(link),
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'description': to_unicode(description),
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'author_email': to_unicode(author_email),
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'author_name': to_unicode(author_name),
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'author_link': iri_to_uri(author_link),
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'pubdate': pubdate,
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'updateddate': updateddate,
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'comments': to_unicode(comments),
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'unique_id': to_unicode(unique_id),
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'unique_id_is_permalink': unique_id_is_permalink,
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'enclosures': enclosures,
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'categories': categories or (),
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'item_copyright': to_unicode(item_copyright),
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'ttl': ttl,
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}
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item.update(kwargs)
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self.items.append(item)
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def num_items(self):
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return len(self.items)
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def root_attributes(self):
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"""
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Return extra attributes to place on the root (i.e. feed/channel) element.
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Called from write().
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"""
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return {}
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def add_root_elements(self, handler):
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"""
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Add elements in the root (i.e. feed/channel) element. Called
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from write().
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"""
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pass
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def item_attributes(self, item):
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"""
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Return extra attributes to place on each item (i.e. item/entry) element.
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"""
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return {}
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def add_item_elements(self, handler, item):
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"""
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Add elements on each item (i.e. item/entry) element.
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"""
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pass
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def write(self, outfile, encoding):
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"""
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Outputs the feed in the given encoding to outfile, which is a file-like
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object. Subclasses should override this.
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"""
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raise NotImplementedError('subclasses of SyndicationFeed must provide a write() method')
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def writeString(self, encoding):
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"""
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Returns the feed in the given encoding as a string.
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"""
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s = io.StringIO()
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self.write(s, encoding)
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return s.getvalue()
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def latest_post_date(self):
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"""
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Returns the latest item's pubdate or updateddate. If no items
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have either of these attributes this returns the current UTC date/time.
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"""
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latest_date = None
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date_keys = ('updateddate', 'pubdate')
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for item in self.items:
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for date_key in date_keys:
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item_date = item.get(date_key)
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if item_date:
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if latest_date is None or item_date > latest_date:
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latest_date = item_date
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# datetime.now(tz=utc) is slower, as documented in django.utils.timezone.now
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return latest_date or datetime.datetime.utcnow().replace(tzinfo=pytz.utc)
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class Enclosure(object):
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"""Represents an RSS enclosure"""
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def __init__(self, url, length, mime_type):
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"""All args are expected to be Python Unicode objects"""
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self.length, self.mime_type = length, mime_type
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self.url = iri_to_uri(url)
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class RssFeed(SyndicationFeed):
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content_type = 'application/rss+xml; charset=utf-8'
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def write(self, outfile, encoding):
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handler = SimplerXMLGenerator(outfile, encoding)
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handler.startDocument()
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handler.startElement("rss", self.rss_attributes())
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handler.startElement("channel", self.root_attributes())
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self.add_root_elements(handler)
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self.write_items(handler)
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self.endChannelElement(handler)
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handler.endElement("rss")
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def rss_attributes(self):
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return {"version": self._version,
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"xmlns:atom": "http://www.w3.org/2005/Atom"}
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def write_items(self, handler):
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for item in self.items:
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handler.startElement('item', self.item_attributes(item))
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self.add_item_elements(handler, item)
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handler.endElement("item")
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def add_root_elements(self, handler):
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handler.addQuickElement("title", self.feed['title'])
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handler.addQuickElement("link", self.feed['link'])
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handler.addQuickElement("description", self.feed['description'])
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if self.feed['feed_url'] is not None:
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handler.addQuickElement("atom:link", None, {"rel": "self", "href": self.feed['feed_url']})
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if self.feed['language'] is not None:
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handler.addQuickElement("language", self.feed['language'])
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for cat in self.feed['categories']:
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handler.addQuickElement("category", cat)
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if self.feed['feed_copyright'] is not None:
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handler.addQuickElement("copyright", self.feed['feed_copyright'])
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handler.addQuickElement("lastBuildDate", rfc2822_date(self.latest_post_date()))
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if self.feed['ttl'] is not None:
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handler.addQuickElement("ttl", self.feed['ttl'])
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def endChannelElement(self, handler):
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handler.endElement("channel")
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class RssUserland091Feed(RssFeed):
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_version = "0.91"
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def add_item_elements(self, handler, item):
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handler.addQuickElement("title", item['title'])
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handler.addQuickElement("link", item['link'])
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if item['description'] is not None:
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handler.addQuickElement("description", item['description'])
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class Rss201rev2Feed(RssFeed):
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# Spec: http://blogs.law.harvard.edu/tech/rss
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_version = "2.0"
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def add_item_elements(self, handler, item):
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handler.addQuickElement("title", item['title'])
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handler.addQuickElement("link", item['link'])
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if item['description'] is not None:
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handler.addQuickElement("description", item['description'])
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# Author information.
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if item["author_name"] and item["author_email"]:
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handler.addQuickElement("author", "%s (%s)" % (item['author_email'], item['author_name']))
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elif item["author_email"]:
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handler.addQuickElement("author", item["author_email"])
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elif item["author_name"]:
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handler.addQuickElement(
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"dc:creator", item["author_name"], {"xmlns:dc": "http://purl.org/dc/elements/1.1/"}
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)
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if item['pubdate'] is not None:
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handler.addQuickElement("pubDate", rfc2822_date(item['pubdate']))
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if item['comments'] is not None:
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handler.addQuickElement("comments", item['comments'])
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if item['unique_id'] is not None:
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guid_attrs = {}
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if isinstance(item.get('unique_id_is_permalink'), bool):
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guid_attrs['isPermaLink'] = str(item['unique_id_is_permalink']).lower()
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handler.addQuickElement("guid", item['unique_id'], guid_attrs)
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if item['ttl'] is not None:
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handler.addQuickElement("ttl", item['ttl'])
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# Enclosure.
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if item['enclosures']:
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enclosures = list(item['enclosures'])
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if len(enclosures) > 1:
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raise ValueError(
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"RSS feed items may only have one enclosure, see "
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"http://www.rssboard.org/rss-profile#element-channel-item-enclosure"
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)
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enclosure = enclosures[0]
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handler.addQuickElement('enclosure', '', {
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'url': enclosure.url,
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'length': enclosure.length,
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'type': enclosure.mime_type,
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})
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# Categories.
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for cat in item['categories']:
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handler.addQuickElement("category", cat)
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class Atom1Feed(SyndicationFeed):
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# Spec: https://tools.ietf.org/html/rfc4287
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content_type = 'application/atom+xml; charset=utf-8'
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ns = "http://www.w3.org/2005/Atom"
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def write(self, outfile, encoding):
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handler = SimplerXMLGenerator(outfile, encoding)
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handler.startDocument()
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handler.startElement('feed', self.root_attributes())
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self.add_root_elements(handler)
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self.write_items(handler)
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handler.endElement("feed")
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def root_attributes(self):
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if self.feed['language'] is not None:
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return {"xmlns": self.ns, "xml:lang": self.feed['language']}
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else:
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return {"xmlns": self.ns}
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def add_root_elements(self, handler):
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handler.addQuickElement("title", self.feed['title'])
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handler.addQuickElement("link", "", {"rel": "alternate", "href": self.feed['link']})
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if self.feed['feed_url'] is not None:
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handler.addQuickElement("link", "", {"rel": "self", "href": self.feed['feed_url']})
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handler.addQuickElement("id", self.feed['id'])
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handler.addQuickElement("updated", rfc3339_date(self.latest_post_date()))
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if self.feed['author_name'] is not None:
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handler.startElement("author", {})
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handler.addQuickElement("name", self.feed['author_name'])
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if self.feed['author_email'] is not None:
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handler.addQuickElement("email", self.feed['author_email'])
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if self.feed['author_link'] is not None:
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handler.addQuickElement("uri", self.feed['author_link'])
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handler.endElement("author")
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if self.feed['subtitle'] is not None:
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handler.addQuickElement("subtitle", self.feed['subtitle'])
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for cat in self.feed['categories']:
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handler.addQuickElement("category", "", {"term": cat})
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if self.feed['feed_copyright'] is not None:
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handler.addQuickElement("rights", self.feed['feed_copyright'])
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def write_items(self, handler):
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for item in self.items:
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handler.startElement("entry", self.item_attributes(item))
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self.add_item_elements(handler, item)
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handler.endElement("entry")
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def add_item_elements(self, handler, item):
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handler.addQuickElement("title", item['title'])
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handler.addQuickElement("link", "", {"href": item['link'], "rel": "alternate"})
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if item['pubdate'] is not None:
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handler.addQuickElement('published', rfc3339_date(item['pubdate']))
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if item['updateddate'] is not None:
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handler.addQuickElement('updated', rfc3339_date(item['updateddate']))
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# Author information.
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if item['author_name'] is not None:
|
|
|
handler.startElement("author", {})
|
|
|
handler.addQuickElement("name", item['author_name'])
|
|
|
if item['author_email'] is not None:
|
|
|
handler.addQuickElement("email", item['author_email'])
|
|
|
if item['author_link'] is not None:
|
|
|
handler.addQuickElement("uri", item['author_link'])
|
|
|
handler.endElement("author")
|
|
|
|
|
|
# Unique ID.
|
|
|
if item['unique_id'] is not None:
|
|
|
unique_id = item['unique_id']
|
|
|
else:
|
|
|
unique_id = get_tag_uri(item['link'], item['pubdate'])
|
|
|
handler.addQuickElement("id", unique_id)
|
|
|
|
|
|
# Summary.
|
|
|
if item['description'] is not None:
|
|
|
handler.addQuickElement("summary", item['description'], {"type": "html"})
|
|
|
|
|
|
# Enclosures.
|
|
|
for enclosure in item['enclosures']:
|
|
|
handler.addQuickElement('link', '', {
|
|
|
'rel': 'enclosure',
|
|
|
'href': enclosure.url,
|
|
|
'length': enclosure.length,
|
|
|
'type': enclosure.mime_type,
|
|
|
})
|
|
|
|
|
|
# Categories.
|
|
|
for cat in item['categories']:
|
|
|
handler.addQuickElement("category", "", {"term": cat})
|
|
|
|
|
|
# Rights.
|
|
|
if item['item_copyright'] is not None:
|
|
|
handler.addQuickElement("rights", item['item_copyright'])
|
|
|
|
|
|
|
|
|
# This isolates the decision of what the system default is, so calling code can
|
|
|
# do "feedgenerator.DefaultFeed" instead of "feedgenerator.Rss201rev2Feed".
|
|
|
DefaultFeed = Rss201rev2Feed
|
