Initial commit

10 files changed, 1804 insertions, 0 deletions

diff --git a/feedgenerator/__init__.py b/feedgenerator/__init__.py
new file mode 100644
index 0000000..2e40b8c
--- /dev/null
+++ b/feedgenerator/__init__.py
@@ -0,0 +1,24 @@
+"""
+Syndication feed generation library -- used for generating RSS, etc.
+
+Sample usage:
+
+>>> import feedgenerator
+>>> feed = feedgenerator.Rss201rev2Feed(
+...     title="Poynter E-Media Tidbits",
+...     link="http://www.poynter.org/column.asp?id=31",
+...     description="A group Weblog by the sharpest minds in online media/journalism/publishing.",
+...     language="en",
+... )
+>>> feed.add_item(
+...     title="Hello",
+...     link="http://www.holovaty.com/test/",
+...     description="Testing."
+... )
+>>> with open('test.rss', 'w') as fp:
+...     feed.write(fp, 'utf-8')
+
+For definitions of the different versions of RSS, see:
+http://web.archive.org/web/20110718035220/http://diveintomark.org/archives/2004/02/04/incompatible-rss
+"""
+from .django.utils.feedgenerator import *
diff --git a/feedgenerator/django/__init__.py b/feedgenerator/django/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/feedgenerator/django/__init__.py
diff --git a/feedgenerator/django/utils/__init__.py b/feedgenerator/django/utils/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/feedgenerator/django/utils/__init__.py
diff --git a/feedgenerator/django/utils/datetime_safe.py b/feedgenerator/django/utils/datetime_safe.py
new file mode 100644
index 0000000..b634888
--- /dev/null
+++ b/feedgenerator/django/utils/datetime_safe.py
@@ -0,0 +1,89 @@
+# Python's datetime strftime doesn't handle dates before 1900.
+# These classes override date and datetime to support the formatting of a date
+# through its full "proleptic Gregorian" date range.
+#
+# Based on code submitted to comp.lang.python by Andrew Dalke
+#
+# >>> datetime_safe.date(1850, 8, 2).strftime("%Y/%m/%d was a %A")
+# '1850/08/02 was a Friday'
+
+from datetime import date as real_date, datetime as real_datetime
+import re
+import time
+
+class date(real_date):
+    def strftime(self, fmt):
+        return strftime(self, fmt)
+
+class datetime(real_datetime):
+    def strftime(self, fmt):
+        return strftime(self, fmt)
+
+    def combine(self, date, time):
+        return datetime(date.year, date.month, date.day, time.hour, time.minute, time.microsecond, time.tzinfo)
+
+    def date(self):
+        return date(self.year, self.month, self.day)
+
+def new_date(d):
+    "Generate a safe date from a datetime.date object."
+    return date(d.year, d.month, d.day)
+
+def new_datetime(d):
+    """
+    Generate a safe datetime from a datetime.date or datetime.datetime object.
+    """
+    kw = [d.year, d.month, d.day]
+    if isinstance(d, real_datetime):
+        kw.extend([d.hour, d.minute, d.second, d.microsecond, d.tzinfo])
+    return datetime(*kw)
+
+# This library does not support strftime's "%s" or "%y" format strings.
+# Allowed if there's an even number of "%"s because they are escaped.
+_illegal_formatting = re.compile(r"((^|[^%])(%%)*%[sy])")
+
+def _findall(text, substr):
+    # Also finds overlaps
+    sites = []
+    i = 0
+    while 1:
+        j = text.find(substr, i)
+        if j == -1:
+            break
+        sites.append(j)
+        i=j+1
+    return sites
+
+def strftime(dt, fmt):
+    if dt.year >= 1900:
+        return super(type(dt), dt).strftime(fmt)
+    illegal_formatting = _illegal_formatting.search(fmt)
+    if illegal_formatting:
+        raise TypeError("strftime of dates before 1900 does not handle" + illegal_formatting.group(0))
+
+    year = dt.year
+    # For every non-leap year century, advance by
+    # 6 years to get into the 28-year repeat cycle
+    delta = 2000 - year
+    off = 6 * (delta // 100 + delta // 400)
+    year = year + off
+
+    # Move to around the year 2000
+    year = year + ((2000 - year) // 28) * 28
+    timetuple = dt.timetuple()
+    s1 = time.strftime(fmt, (year,) + timetuple[1:])
+    sites1 = _findall(s1, str(year))
+
+    s2 = time.strftime(fmt, (year+28,) + timetuple[1:])
+    sites2 = _findall(s2, str(year+28))
+
+    sites = []
+    for site in sites1:
+        if site in sites2:
+            sites.append(site)
+
+    s = s1
+    syear = "%04d" % (dt.year,)
+    for site in sites:
+        s = s[:site] + syear + s[site+4:]
+    return s
diff --git a/feedgenerator/django/utils/encoding.py b/feedgenerator/django/utils/encoding.py
new file mode 100644
index 0000000..f13412d
--- /dev/null
+++ b/feedgenerator/django/utils/encoding.py
@@ -0,0 +1,256 @@
+from __future__ import unicode_literals
+
+import codecs
+import datetime
+from decimal import Decimal
+import locale
+try:
+    from urllib.parse import quote
+except ImportError:     # Python 2
+    from urllib import quote
+import warnings
+
+from .functional import Promise
+from . import six
+
+class DjangoUnicodeDecodeError(UnicodeDecodeError):
+    def __init__(self, obj, *args):
+        self.obj = obj
+        UnicodeDecodeError.__init__(self, *args)
+
+    def __str__(self):
+        original = UnicodeDecodeError.__str__(self)
+        return '%s. You passed in %r (%s)' % (original, self.obj,
+                type(self.obj))
+
+class StrAndUnicode(object):
+    """
+    A class that derives __str__ from __unicode__.
+
+    On Python 2, __str__ returns the output of __unicode__ encoded as a UTF-8
+    bytestring. On Python 3, __str__ returns the output of __unicode__.
+
+    Useful as a mix-in. If you support Python 2 and 3 with a single code base,
+    you can inherit this mix-in and just define __unicode__.
+    """
+    def __init__(self, *args, **kwargs):
+        warnings.warn("StrAndUnicode is deprecated. Define a __str__ method "
+                      "and apply the @python_2_unicode_compatible decorator "
+                      "instead.", PendingDeprecationWarning, stacklevel=2)
+        super(StrAndUnicode, self).__init__(*args, **kwargs)
+
+    if six.PY3:
+        def __str__(self):
+            return self.__unicode__()
+    else:
+        def __str__(self):
+            return self.__unicode__().encode('utf-8')
+
+def python_2_unicode_compatible(klass):
+    """
+    A decorator that defines __unicode__ and __str__ methods under Python 2.
+    Under Python 3 it does nothing.
+
+    To support Python 2 and 3 with a single code base, define a __str__ method
+    returning text and apply this decorator to the class.
+    """
+    if not six.PY3:
+        klass.__unicode__ = klass.__str__
+        klass.__str__ = lambda self: self.__unicode__().encode('utf-8')
+    return klass
+
+def smart_text(s, encoding='utf-8', strings_only=False, errors='strict'):
+    """
+    Returns a text object representing 's' -- unicode on Python 2 and str on
+    Python 3. Treats bytestrings using the 'encoding' codec.
+
+    If strings_only is True, don't convert (some) non-string-like objects.
+    """
+    if isinstance(s, Promise):
+        # The input is the result of a gettext_lazy() call.
+        return s
+    return force_text(s, encoding, strings_only, errors)
+
+def is_protected_type(obj):
+    """Determine if the object instance is of a protected type.
+
+    Objects of protected types are preserved as-is when passed to
+    force_text(strings_only=True).
+    """
+    return isinstance(obj, six.integer_types + (type(None), float, Decimal,
+        datetime.datetime, datetime.date, datetime.time))
+
+def force_text(s, encoding='utf-8', strings_only=False, errors='strict'):
+    """
+    Similar to smart_text, except that lazy instances are resolved to
+    strings, rather than kept as lazy objects.
+
+    If strings_only is True, don't convert (some) non-string-like objects.
+    """
+    # Handle the common case first, saves 30-40% when s is an instance of
+    # six.text_type. This function gets called often in that setting.
+    if isinstance(s, six.text_type):
+        return s
+    if strings_only and is_protected_type(s):
+        return s
+    try:
+        if not isinstance(s, six.string_types):
+            if hasattr(s, '__unicode__'):
+                s = s.__unicode__()
+            else:
+                try:
+                    if six.PY3:
+                        if isinstance(s, bytes):
+                            s = six.text_type(s, encoding, errors)
+                        else:
+                            s = six.text_type(s)
+                    else:
+                        s = six.text_type(bytes(s), encoding, errors)
+                except UnicodeEncodeError:
+                    if not isinstance(s, Exception):
+                        raise
+                    # If we get to here, the caller has passed in an Exception
+                    # subclass populated with non-ASCII data without special
+                    # handling to display as a string. We need to handle this
+                    # without raising a further exception. We do an
+                    # approximation to what the Exception's standard str()
+                    # output should be.
+                    s = ' '.join([force_text(arg, encoding, strings_only,
+                            errors) for arg in s])
+        else:
+            # Note: We use .decode() here, instead of six.text_type(s, encoding,
+            # errors), so that if s is a SafeBytes, it ends up being a
+            # SafeText at the end.
+            s = s.decode(encoding, errors)
+    except UnicodeDecodeError as e:
+        if not isinstance(s, Exception):
+            raise DjangoUnicodeDecodeError(s, *e.args)
+        else:
+            # If we get to here, the caller has passed in an Exception
+            # subclass populated with non-ASCII bytestring data without a
+            # working unicode method. Try to handle this without raising a
+            # further exception by individually forcing the exception args
+            # to unicode.
+            s = ' '.join([force_text(arg, encoding, strings_only,
+                    errors) for arg in s])
+    return s
+
+def smart_bytes(s, encoding='utf-8', strings_only=False, errors='strict'):
+    """
+    Returns a bytestring version of 's', encoded as specified in 'encoding'.
+
+    If strings_only is True, don't convert (some) non-string-like objects.
+    """
+    if isinstance(s, Promise):
+        # The input is the result of a gettext_lazy() call.
+        return s
+    return force_bytes(s, encoding, strings_only, errors)
+
+
+def force_bytes(s, encoding='utf-8', strings_only=False, errors='strict'):
+    """
+    Similar to smart_bytes, except that lazy instances are resolved to
+    strings, rather than kept as lazy objects.
+
+    If strings_only is True, don't convert (some) non-string-like objects.
+    """
+    if isinstance(s, bytes):
+        if encoding == 'utf-8':
+            return s
+        else:
+            return s.decode('utf-8', errors).encode(encoding, errors)
+    if strings_only and (s is None or isinstance(s, int)):
+        return s
+    if isinstance(s, Promise):
+        return six.text_type(s).encode(encoding, errors)
+    if not isinstance(s, six.string_types):
+        try:
+            if six.PY3:
+                return six.text_type(s).encode(encoding)
+            else:
+                return bytes(s)
+        except UnicodeEncodeError:
+            if isinstance(s, Exception):
+                # An Exception subclass containing non-ASCII data that doesn't
+                # know how to print itself properly. We shouldn't raise a
+                # further exception.
+                return ' '.join([smart_bytes(arg, encoding, strings_only,
+                        errors) for arg in s])
+            return six.text_type(s).encode(encoding, errors)
+    else:
+        return s.encode(encoding, errors)
+
+if six.PY3:
+    smart_str = smart_text
+    force_str = force_text
+else:
+    smart_str = smart_bytes
+    force_str = force_bytes
+    # backwards compatibility for Python 2
+    smart_unicode = smart_text
+    force_unicode = force_text
+
+smart_str.__doc__ = """\
+Apply smart_text in Python 3 and smart_bytes in Python 2.
+
+This is suitable for writing to sys.stdout (for instance).
+"""
+
+force_str.__doc__ = """\
+Apply force_text in Python 3 and force_bytes in Python 2.
+"""
+
+def iri_to_uri(iri):
+    """
+    Convert an Internationalized Resource Identifier (IRI) portion to a URI
+    portion that is suitable for inclusion in a URL.
+
+    This is the algorithm from section 3.1 of RFC 3987.  However, since we are
+    assuming input is either UTF-8 or unicode already, we can simplify things a
+    little from the full method.
+
+    Returns an ASCII string containing the encoded result.
+    """
+    # The list of safe characters here is constructed from the "reserved" and
+    # "unreserved" characters specified in sections 2.2 and 2.3 of RFC 3986:
+    #     reserved    = gen-delims / sub-delims
+    #     gen-delims  = ":" / "/" / "?" / "#" / "[" / "]" / "@"
+    #     sub-delims  = "!" / "$" / "&" / "'" / "(" / ")"
+    #                   / "*" / "+" / "," / ";" / "="
+    #     unreserved  = ALPHA / DIGIT / "-" / "." / "_" / "~"
+    # Of the unreserved characters, urllib.quote already considers all but
+    # the ~ safe.
+    # The % character is also added to the list of safe characters here, as the
+    # end of section 3.1 of RFC 3987 specifically mentions that % must not be
+    # converted.
+    if iri is None:
+        return iri
+    return quote(smart_bytes(iri), safe=b"/#%[]=:;$&()+,!?*@'~")
+
+def filepath_to_uri(path):
+    """Convert an file system path to a URI portion that is suitable for
+    inclusion in a URL.
+
+    We are assuming input is either UTF-8 or unicode already.
+
+    This method will encode certain chars that would normally be recognized as
+    special chars for URIs.  Note that this method does not encode the '
+    character, as it is a valid character within URIs.  See
+    encodeURIComponent() JavaScript function for more details.
+
+    Returns an ASCII string containing the encoded result.
+    """
+    if path is None:
+        return path
+    # I know about `os.sep` and `os.altsep` but I want to leave
+    # some flexibility for hardcoding separators.
+    return quote(smart_bytes(path.replace("\\", "/")), safe=b"/~!*()'")
+
+# The encoding of the default system locale but falls back to the
+# given fallback encoding if the encoding is unsupported by python or could
+# not be determined.  See tickets #10335 and #5846
+try:
+    DEFAULT_LOCALE_ENCODING = locale.getdefaultlocale()[1] or 'ascii'
+    codecs.lookup(DEFAULT_LOCALE_ENCODING)
+except:
+    DEFAULT_LOCALE_ENCODING = 'ascii'
diff --git a/feedgenerator/django/utils/feedgenerator.py b/feedgenerator/django/utils/feedgenerator.py
new file mode 100644
index 0000000..54bc7ed
--- /dev/null
+++ b/feedgenerator/django/utils/feedgenerator.py
@@ -0,0 +1,389 @@
+"""
+Syndication feed generation library -- used for generating RSS, etc.
+
+Sample usage:
+
+>>> from django.utils import feedgenerator
+>>> feed = feedgenerator.Rss201rev2Feed(
+...     title="Poynter E-Media Tidbits",
+...     link="http://www.poynter.org/column.asp?id=31",
+...     description="A group Weblog by the sharpest minds in online media/journalism/publishing.",
+...     language="en",
+... )
+>>> feed.add_item(
+...     title="Hello",
+...     link="http://www.holovaty.com/test/",
+...     description="Testing."
+... )
+>>> with open('test.rss', 'w') as fp:
+...     feed.write(fp, 'utf-8')
+
+For definitions of the different versions of RSS, see:
+http://web.archive.org/web/20110718035220/http://diveintomark.org/archives/2004/02/04/incompatible-rss
+"""
+from __future__ import unicode_literals
+
+import datetime
+try:
+    from urllib.parse import urlparse
+except ImportError:     # Python 2
+    from urlparse import urlparse
+from .xmlutils import SimplerXMLGenerator
+from .encoding import force_text, iri_to_uri
+from . import datetime_safe
+from . import six
+from .six import StringIO
+from .timezone import is_aware
+
+def rfc2822_date(date):
+    # We can't use strftime() because it produces locale-dependant results, so
+    # we have to map english month and day names manually
+    months = ('Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec',)
+    days = ('Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun')
+    # Support datetime objects older than 1900
+    date = datetime_safe.new_datetime(date)
+    # We do this ourselves to be timezone aware, email.Utils is not tz aware.
+    dow = days[date.weekday()]
+    month = months[date.month - 1]
+    time_str = date.strftime('%s, %%d %s %%Y %%H:%%M:%%S ' % (dow, month))
+    if not six.PY3:             # strftime returns a byte string in Python 2
+        time_str = time_str.decode('utf-8')
+    if is_aware(date):
+        offset = date.tzinfo.utcoffset(date)
+        timezone = (offset.days * 24 * 60) + (offset.seconds // 60)
+        hour, minute = divmod(timezone, 60)
+        return time_str + '%+03d%02d' % (hour, minute)
+    else:
+        return time_str + '-0000'
+
+def rfc3339_date(date):
+    # Support datetime objects older than 1900
+    date = datetime_safe.new_datetime(date)
+    time_str = date.strftime('%Y-%m-%dT%H:%M:%S')
+    if not six.PY3:             # strftime returns a byte string in Python 2
+        time_str = time_str.decode('utf-8')
+    if is_aware(date):
+        offset = date.tzinfo.utcoffset(date)
+        timezone = (offset.days * 24 * 60) + (offset.seconds // 60)
+        hour, minute = divmod(timezone, 60)
+        return time_str + '%+03d:%02d' % (hour, minute)
+    else:
+        return time_str + 'Z'
+
+def get_tag_uri(url, date):
+    """
+    Creates a TagURI.
+
+    See http://web.archive.org/web/20110514113830/http://diveintomark.org/archives/2004/05/28/howto-atom-id
+    """
+    bits = urlparse(url)
+    d = ''
+    if date is not None:
+        d = ',%s' % datetime_safe.new_datetime(date).strftime('%Y-%m-%d')
+    return 'tag:%s%s:%s/%s' % (bits.hostname, d, bits.path, bits.fragment)
+
+class SyndicationFeed(object):
+    "Base class for all syndication feeds. Subclasses should provide write()"
+    def __init__(self, title, link, description, language=None, author_email=None,
+            author_name=None, author_link=None, subtitle=None, categories=None,
+            feed_url=None, feed_copyright=None, feed_guid=None, ttl=None, **kwargs):
+        to_unicode = lambda s: force_text(s, strings_only=True)
+        if categories:
+            categories = [force_text(c) for c in categories]
+        if ttl is not None:
+            # Force ints to unicode
+            ttl = force_text(ttl)
+        self.feed = {
+            'title': to_unicode(title),
+            'link': iri_to_uri(link),
+            'description': to_unicode(description),
+            'language': to_unicode(language),
+            'author_email': to_unicode(author_email),
+            'author_name': to_unicode(author_name),
+            'author_link': iri_to_uri(author_link),
+            'subtitle': to_unicode(subtitle),
+            'categories': categories or (),
+            'feed_url': iri_to_uri(feed_url),
+            'feed_copyright': to_unicode(feed_copyright),
+            'id': feed_guid or link,
+            'ttl': ttl,
+        }
+        self.feed.update(kwargs)
+        self.items = []
+
+    def add_item(self, title, link, description, author_email=None,
+        author_name=None, author_link=None, pubdate=None, comments=None,
+        unique_id=None, enclosure=None, categories=(), item_copyright=None,
+        ttl=None, **kwargs):
+        """
+        Adds an item to the feed. All args are expected to be Python Unicode
+        objects except pubdate, which is a datetime.datetime object, and
+        enclosure, which is an instance of the Enclosure class.
+        """
+        to_unicode = lambda s: force_text(s, strings_only=True)
+        if categories:
+            categories = [to_unicode(c) for c in categories]
+        if ttl is not None:
+            # Force ints to unicode
+            ttl = force_text(ttl)
+        item = {
+            'title': to_unicode(title),
+            'link': iri_to_uri(link),
+            'description': to_unicode(description),
+            'author_email': to_unicode(author_email),
+            'author_name': to_unicode(author_name),
+            'author_link': iri_to_uri(author_link),
+            'pubdate': pubdate,
+            'comments': to_unicode(comments),
+            'unique_id': to_unicode(unique_id),
+            'enclosure': enclosure,
+            'categories': categories or (),
+            'item_copyright': to_unicode(item_copyright),
+            'ttl': ttl,
+        }
+        item.update(kwargs)
+        self.items.append(item)
+
+    def num_items(self):
+        return len(self.items)
+
+    def root_attributes(self):
+        """
+        Return extra attributes to place on the root (i.e. feed/channel) element.
+        Called from write().
+        """
+        return {}
+
+    def add_root_elements(self, handler):
+        """
+        Add elements in the root (i.e. feed/channel) element. Called
+        from write().
+        """
+        pass
+
+    def item_attributes(self, item):
+        """
+        Return extra attributes to place on each item (i.e. item/entry) element.
+        """
+        return {}
+
+    def add_item_elements(self, handler, item):
+        """
+        Add elements on each item (i.e. item/entry) element.
+        """
+        pass
+
+    def write(self, outfile, encoding):
+        """
+        Outputs the feed in the given encoding to outfile, which is a file-like
+        object. Subclasses should override this.
+        """
+        raise NotImplementedError
+
+    def writeString(self, encoding):
+        """
+        Returns the feed in the given encoding as a string.
+        """
+        s = StringIO()
+        self.write(s, encoding)
+        return s.getvalue()
+
+    def latest_post_date(self):
+        """
+        Returns the latest item's pubdate. If none of them have a pubdate,
+        this returns the current date/time.
+        """
+        updates = [i['pubdate'] for i in self.items if i['pubdate'] is not None]
+        if len(updates) > 0:
+            updates.sort()
+            return updates[-1]
+        else:
+            return datetime.datetime.now()
+
+class Enclosure(object):
+    "Represents an RSS enclosure"
+    def __init__(self, url, length, mime_type):
+        "All args are expected to be Python Unicode objects"
+        self.length, self.mime_type = length, mime_type
+        self.url = iri_to_uri(url)
+
+class RssFeed(SyndicationFeed):
+    mime_type = 'application/rss+xml; charset=utf-8'
+    def write(self, outfile, encoding):
+        handler = SimplerXMLGenerator(outfile, encoding)
+        handler.startDocument()
+        handler.startElement("rss", self.rss_attributes())
+        handler.startElement("channel", self.root_attributes())
+        self.add_root_elements(handler)
+        self.write_items(handler)
+        self.endChannelElement(handler)
+        handler.endElement("rss")
+
+    def rss_attributes(self):
+        return {"version": self._version,
+                "xmlns:atom": "http://www.w3.org/2005/Atom"}
+
+    def write_items(self, handler):
+        for item in self.items:
+            handler.startElement('item', self.item_attributes(item))
+            self.add_item_elements(handler, item)
+            handler.endElement("item")
+
+    def add_root_elements(self, handler):
+        handler.addQuickElement("title", self.feed['title'])
+        handler.addQuickElement("link", self.feed['link'])
+        handler.addQuickElement("description", self.feed['description'])
+        if self.feed['feed_url'] is not None:
+            handler.addQuickElement("atom:link", None,
+                    {"rel": "self", "href": self.feed['feed_url']})
+        if self.feed['language'] is not None:
+            handler.addQuickElement("language", self.feed['language'])
+        for cat in self.feed['categories']:
+            handler.addQuickElement("category", cat)
+        if self.feed['feed_copyright'] is not None:
+            handler.addQuickElement("copyright", self.feed['feed_copyright'])
+        handler.addQuickElement("lastBuildDate", rfc2822_date(self.latest_post_date()))
+        if self.feed['ttl'] is not None:
+            handler.addQuickElement("ttl", self.feed['ttl'])
+
+    def endChannelElement(self, handler):
+        handler.endElement("channel")
+
+class RssUserland091Feed(RssFeed):
+    _version = "0.91"
+    def add_item_elements(self, handler, item):
+        handler.addQuickElement("title", item['title'])
+        handler.addQuickElement("link", item['link'])
+        if item['description'] is not None:
+            handler.addQuickElement("description", item['description'])
+
+class Rss201rev2Feed(RssFeed):
+    # Spec: http://blogs.law.harvard.edu/tech/rss
+    _version = "2.0"
+    def add_item_elements(self, handler, item):
+        handler.addQuickElement("title", item['title'])
+        handler.addQuickElement("link", item['link'])
+        if item['description'] is not None:
+            handler.addQuickElement("description", item['description'])
+
+        # Author information.
+        if item["author_name"] and item["author_email"]:
+            handler.addQuickElement("author", "%s (%s)" % \
+                (item['author_email'], item['author_name']))
+        elif item["author_email"]:
+            handler.addQuickElement("author", item["author_email"])
+        elif item["author_name"]:
+            handler.addQuickElement("dc:creator", item["author_name"], {"xmlns:dc": "http://purl.org/dc/elements/1.1/"})
+
+        if item['pubdate'] is not None:
+            handler.addQuickElement("pubDate", rfc2822_date(item['pubdate']))
+        if item['comments'] is not None:
+            handler.addQuickElement("comments", item['comments'])
+        if item['unique_id'] is not None:
+            handler.addQuickElement("guid", item['unique_id'])
+        if item['ttl'] is not None:
+            handler.addQuickElement("ttl", item['ttl'])
+
+        # Enclosure.
+        if item['enclosure'] is not None:
+            handler.addQuickElement("enclosure", '',
+                {"url": item['enclosure'].url, "length": item['enclosure'].length,
+                    "type": item['enclosure'].mime_type})
+
+        # Categories.
+        for cat in item['categories']:
+            handler.addQuickElement("category", cat)
+
+class Atom1Feed(SyndicationFeed):
+    # Spec: http://atompub.org/2005/07/11/draft-ietf-atompub-format-10.html
+    mime_type = 'application/atom+xml; charset=utf-8'
+    ns = "http://www.w3.org/2005/Atom"
+
+    def write(self, outfile, encoding):
+        handler = SimplerXMLGenerator(outfile, encoding)
+        handler.startDocument()
+        handler.startElement('feed', self.root_attributes())
+        self.add_root_elements(handler)
+        self.write_items(handler)
+        handler.endElement("feed")
+
+    def root_attributes(self):
+        if self.feed['language'] is not None:
+            return {"xmlns": self.ns, "xml:lang": self.feed['language']}
+        else:
+            return {"xmlns": self.ns}
+
+    def add_root_elements(self, handler):
+        handler.addQuickElement("title", self.feed['title'])
+        handler.addQuickElement("link", "", {"rel": "alternate", "href": self.feed['link']})
+        if self.feed['feed_url'] is not None:
+            handler.addQuickElement("link", "", {"rel": "self", "href": self.feed['feed_url']})
+        handler.addQuickElement("id", self.feed['id'])
+        handler.addQuickElement("updated", rfc3339_date(self.latest_post_date()))
+        if self.feed['author_name'] is not None:
+            handler.startElement("author", {})
+            handler.addQuickElement("name", self.feed['author_name'])
+            if self.feed['author_email'] is not None:
+                handler.addQuickElement("email", self.feed['author_email'])
+            if self.feed['author_link'] is not None:
+                handler.addQuickElement("uri", self.feed['author_link'])
+            handler.endElement("author")
+        if self.feed['subtitle'] is not None:
+            handler.addQuickElement("subtitle", self.feed['subtitle'])
+        for cat in self.feed['categories']:
+            handler.addQuickElement("category", "", {"term": cat})
+        if self.feed['feed_copyright'] is not None:
+            handler.addQuickElement("rights", self.feed['feed_copyright'])
+
+    def write_items(self, handler):
+        for item in self.items:
+            handler.startElement("entry", self.item_attributes(item))
+            self.add_item_elements(handler, item)
+            handler.endElement("entry")
+
+    def add_item_elements(self, handler, item):
+        handler.addQuickElement("title", item['title'])
+        handler.addQuickElement("link", "", {"href": item['link'], "rel": "alternate"})
+        if item['pubdate'] is not None:
+            handler.addQuickElement("updated", rfc3339_date(item['pubdate']))
+
+        # Author information.
+        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"})
+
+        # Enclosure.
+        if item['enclosure'] is not None:
+            handler.addQuickElement("link", '',
+                {"rel": "enclosure",
+                 "href": item['enclosure'].url,
+                 "length": item['enclosure'].length,
+                 "type": item['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
diff --git a/feedgenerator/django/utils/functional.py b/feedgenerator/django/utils/functional.py
new file mode 100644
index 0000000..8d8f759
--- /dev/null
+++ b/feedgenerator/django/utils/functional.py
@@ -0,0 +1,370 @@
+import copy
+import operator
+from functools import wraps, update_wrapper
+import sys
+
+from . import six
+
+# You can't trivially replace this `functools.partial` because this binds to
+# classes and returns bound instances, whereas functools.partial (on CPython)
+# is a type and its instances don't bind.
+def curry(_curried_func, *args, **kwargs):
+    def _curried(*moreargs, **morekwargs):
+        return _curried_func(*(args+moreargs), **dict(kwargs, **morekwargs))
+    return _curried
+
+def memoize(func, cache, num_args):
+    """
+    Wrap a function so that results for any argument tuple are stored in
+    'cache'. Note that the args to the function must be usable as dictionary
+    keys.
+
+    Only the first num_args are considered when creating the key.
+    """
+    @wraps(func)
+    def wrapper(*args):
+        mem_args = args[:num_args]
+        if mem_args in cache:
+            return cache[mem_args]
+        result = func(*args)
+        cache[mem_args] = result
+        return result
+    return wrapper
+
+class cached_property(object):
+    """
+    Decorator that creates converts a method with a single
+    self argument into a property cached on the instance.
+    """
+    def __init__(self, func):
+        self.func = func
+
+    def __get__(self, instance, type):
+        res = instance.__dict__[self.func.__name__] = self.func(instance)
+        return res
+
+class Promise(object):
+    """
+    This is just a base class for the proxy class created in
+    the closure of the lazy function. It can be used to recognize
+    promises in code.
+    """
+    pass
+
+def lazy(func, *resultclasses):
+    """
+    Turns any callable into a lazy evaluated callable. You need to give result
+    classes or types -- at least one is needed so that the automatic forcing of
+    the lazy evaluation code is triggered. Results are not memoized; the
+    function is evaluated on every access.
+    """
+
+    @total_ordering
+    class __proxy__(Promise):
+        """
+        Encapsulate a function call and act as a proxy for methods that are
+        called on the result of that function. The function is not evaluated
+        until one of the methods on the result is called.
+        """
+        __dispatch = None
+
+        def __init__(self, args, kw):
+            self.__args = args
+            self.__kw = kw
+            if self.__dispatch is None:
+                self.__prepare_class__()
+
+        def __reduce__(self):
+            return (
+                _lazy_proxy_unpickle,
+                (func, self.__args, self.__kw) + resultclasses
+            )
+
+        def __prepare_class__(cls):
+            cls.__dispatch = {}
+            for resultclass in resultclasses:
+                cls.__dispatch[resultclass] = {}
+                for type_ in reversed(resultclass.mro()):
+                    for (k, v) in type_.__dict__.items():
+                        # All __promise__ return the same wrapper method, but they
+                        # also do setup, inserting the method into the dispatch
+                        # dict.
+                        meth = cls.__promise__(resultclass, k, v)
+                        if hasattr(cls, k):
+                            continue
+                        setattr(cls, k, meth)
+            cls._delegate_bytes = bytes in resultclasses
+            cls._delegate_text = six.text_type in resultclasses
+            assert not (cls._delegate_bytes and cls._delegate_text), "Cannot call lazy() with both bytes and text return types."
+            if cls._delegate_text:
+                if six.PY3:
+                    cls.__str__ = cls.__text_cast
+                else:
+                    cls.__unicode__ = cls.__text_cast
+            elif cls._delegate_bytes:
+                if six.PY3:
+                    cls.__bytes__ = cls.__bytes_cast
+                else:
+                    cls.__str__ = cls.__bytes_cast
+        __prepare_class__ = classmethod(__prepare_class__)
+
+        def __promise__(cls, klass, funcname, method):
+            # Builds a wrapper around some magic method and registers that magic
+            # method for the given type and method name.
+            def __wrapper__(self, *args, **kw):
+                # Automatically triggers the evaluation of a lazy value and
+                # applies the given magic method of the result type.
+                res = func(*self.__args, **self.__kw)
+                for t in type(res).mro():
+                    if t in self.__dispatch:
+                        return self.__dispatch[t][funcname](res, *args, **kw)
+                raise TypeError("Lazy object returned unexpected type.")
+
+            if klass not in cls.__dispatch:
+                cls.__dispatch[klass] = {}
+            cls.__dispatch[klass][funcname] = method
+            return __wrapper__
+        __promise__ = classmethod(__promise__)
+
+        def __text_cast(self):
+            return func(*self.__args, **self.__kw)
+
+        def __bytes_cast(self):
+            return bytes(func(*self.__args, **self.__kw))
+
+        def __cast(self):
+            if self._delegate_bytes:
+                return self.__bytes_cast()
+            elif self._delegate_text:
+                return self.__text_cast()
+            else:
+                return func(*self.__args, **self.__kw)
+
+        def __eq__(self, other):
+            if isinstance(other, Promise):
+                other = other.__cast()
+            return self.__cast() == other
+
+        def __lt__(self, other):
+            if isinstance(other, Promise):
+                other = other.__cast()
+            return self.__cast() < other
+
+        __hash__ = object.__hash__
+
+        def __mod__(self, rhs):
+            if self._delegate_bytes and not six.PY3:
+                return bytes(self) % rhs
+            elif self._delegate_text:
+                return six.text_type(self) % rhs
+            else:
+                raise AssertionError('__mod__ not supported for non-string types')
+
+        def __deepcopy__(self, memo):
+            # Instances of this class are effectively immutable. It's just a
+            # collection of functions. So we don't need to do anything
+            # complicated for copying.
+            memo[id(self)] = self
+            return self
+
+    @wraps(func)
+    def __wrapper__(*args, **kw):
+        # Creates the proxy object, instead of the actual value.
+        return __proxy__(args, kw)
+
+    return __wrapper__
+
+def _lazy_proxy_unpickle(func, args, kwargs, *resultclasses):
+    return lazy(func, *resultclasses)(*args, **kwargs)
+
+def allow_lazy(func, *resultclasses):
+    """
+    A decorator that allows a function to be called with one or more lazy
+    arguments. If none of the args are lazy, the function is evaluated
+    immediately, otherwise a __proxy__ is returned that will evaluate the
+    function when needed.
+    """
+    @wraps(func)
+    def wrapper(*args, **kwargs):
+        for arg in list(args) + list(six.itervalues(kwargs)):
+            if isinstance(arg, Promise):
+                break
+        else:
+            return func(*args, **kwargs)
+        return lazy(func, *resultclasses)(*args, **kwargs)
+    return wrapper
+
+empty = object()
+def new_method_proxy(func):
+    def inner(self, *args):
+        if self._wrapped is empty:
+            self._setup()
+        return func(self._wrapped, *args)
+    return inner
+
+class LazyObject(object):
+    """
+    A wrapper for another class that can be used to delay instantiation of the
+    wrapped class.
+
+    By subclassing, you have the opportunity to intercept and alter the
+    instantiation. If you don't need to do that, use SimpleLazyObject.
+    """
+    def __init__(self):
+        self._wrapped = empty
+
+    __getattr__ = new_method_proxy(getattr)
+
+    def __setattr__(self, name, value):
+        if name == "_wrapped":
+            # Assign to __dict__ to avoid infinite __setattr__ loops.
+            self.__dict__["_wrapped"] = value
+        else:
+            if self._wrapped is empty:
+                self._setup()
+            setattr(self._wrapped, name, value)
+
+    def __delattr__(self, name):
+        if name == "_wrapped":
+            raise TypeError("can't delete _wrapped.")
+        if self._wrapped is empty:
+            self._setup()
+        delattr(self._wrapped, name)
+
+    def _setup(self):
+        """
+        Must be implemented by subclasses to initialise the wrapped object.
+        """
+        raise NotImplementedError
+
+    # introspection support:
+    __dir__ = new_method_proxy(dir)
+
+
+# Workaround for http://bugs.python.org/issue12370
+_super = super
+
+class SimpleLazyObject(LazyObject):
+    """
+    A lazy object initialised from any function.
+
+    Designed for compound objects of unknown type. For builtins or objects of
+    known type, use django.utils.functional.lazy.
+    """
+    def __init__(self, func):
+        """
+        Pass in a callable that returns the object to be wrapped.
+
+        If copies are made of the resulting SimpleLazyObject, which can happen
+        in various circumstances within Django, then you must ensure that the
+        callable can be safely run more than once and will return the same
+        value.
+        """
+        self.__dict__['_setupfunc'] = func
+        _super(SimpleLazyObject, self).__init__()
+
+    def _setup(self):
+        self._wrapped = self._setupfunc()
+
+    if six.PY3:
+        __bytes__ = new_method_proxy(bytes)
+        __str__ = new_method_proxy(str)
+    else:
+        __str__ = new_method_proxy(str)
+        __unicode__ = new_method_proxy(unicode)
+
+    def __deepcopy__(self, memo):
+        if self._wrapped is empty:
+            # We have to use SimpleLazyObject, not self.__class__, because the
+            # latter is proxied.
+            result = SimpleLazyObject(self._setupfunc)
+            memo[id(self)] = result
+            return result
+        else:
+            return copy.deepcopy(self._wrapped, memo)
+
+    # Because we have messed with __class__ below, we confuse pickle as to what
+    # class we are pickling. It also appears to stop __reduce__ from being
+    # called. So, we define __getstate__ in a way that cooperates with the way
+    # that pickle interprets this class.  This fails when the wrapped class is a
+    # builtin, but it is better than nothing.
+    def __getstate__(self):
+        if self._wrapped is empty:
+            self._setup()
+        return self._wrapped.__dict__
+
+    # Need to pretend to be the wrapped class, for the sake of objects that care
+    # about this (especially in equality tests)
+    __class__ = property(new_method_proxy(operator.attrgetter("__class__")))
+    __eq__ = new_method_proxy(operator.eq)
+    __hash__ = new_method_proxy(hash)
+    __bool__ = new_method_proxy(bool)       # Python 3
+    __nonzero__ = __bool__                  # Python 2
+
+
+class lazy_property(property):
+    """
+    A property that works with subclasses by wrapping the decorated
+    functions of the base class.
+    """
+    def __new__(cls, fget=None, fset=None, fdel=None, doc=None):
+        if fget is not None:
+            @wraps(fget)
+            def fget(instance, instance_type=None, name=fget.__name__):
+                return getattr(instance, name)()
+        if fset is not None:
+            @wraps(fset)
+            def fset(instance, value, name=fset.__name__):
+                return getattr(instance, name)(value)
+        if fdel is not None:
+            @wraps(fdel)
+            def fdel(instance, name=fdel.__name__):
+                return getattr(instance, name)()
+        return property(fget, fset, fdel, doc)
+
+def partition(predicate, values):
+    """
+    Splits the values into two sets, based on the return value of the function
+    (True/False). e.g.:
+
+        >>> partition(lambda x: x > 3, range(5))
+        [0, 1, 2, 3], [4]
+    """
+    results = ([], [])
+    for item in values:
+        results[predicate(item)].append(item)
+    return results
+
+if sys.version_info >= (2,7,2):
+    from functools import total_ordering
+else:
+    # For Python < 2.7.2. Python 2.6 does not have total_ordering, and
+    # total_ordering in 2.7 versions prior to 2.7.2 is buggy. See
+    # http://bugs.python.org/issue10042 for details. For these versions use
+    # code borrowed from Python 2.7.3.
+    def total_ordering(cls):
+        """Class decorator that fills in missing ordering methods"""
+        convert = {
+            '__lt__': [('__gt__', lambda self, other: not (self < other or self == other)),
+                       ('__le__', lambda self, other: self < other or self == other),
+                       ('__ge__', lambda self, other: not self < other)],
+            '__le__': [('__ge__', lambda self, other: not self <= other or self == other),
+                       ('__lt__', lambda self, other: self <= other and not self == other),
+                       ('__gt__', lambda self, other: not self <= other)],
+            '__gt__': [('__lt__', lambda self, other: not (self > other or self == other)),
+                       ('__ge__', lambda self, other: self > other or self == other),
+                       ('__le__', lambda self, other: not self > other)],
+            '__ge__': [('__le__', lambda self, other: (not self >= other) or self == other),
+                       ('__gt__', lambda self, other: self >= other and not self == other),
+                       ('__lt__', lambda self, other: not self >= other)]
+        }
+        roots = set(dir(cls)) & set(convert)
+        if not roots:
+            raise ValueError('must define at least one ordering operation: < > <= >=')
+        root = max(roots)       # prefer __lt__ to __le__ to __gt__ to __ge__
+        for opname, opfunc in convert[root]:
+            if opname not in roots:
+                opfunc.__name__ = opname
+                opfunc.__doc__ = getattr(int, opname).__doc__
+                setattr(cls, opname, opfunc)
+        return cls
diff --git a/feedgenerator/django/utils/six.py b/feedgenerator/django/utils/six.py
new file mode 100644
index 0000000..767fe0b
--- /dev/null
+++ b/feedgenerator/django/utils/six.py
@@ -0,0 +1,370 @@
+"""Utilities for writing code that runs on Python 2 and 3"""
+
+import operator
+import sys
+import types
+
+__author__ = "Benjamin Peterson <benjamin@python.org>"
+__version__ = "1.1.0"
+
+
+# True if we are running on Python 3.
+PY3 = sys.version_info[0] == 3
+
+if PY3:
+    string_types = str,
+    integer_types = int,
+    class_types = type,
+    text_type = str
+    binary_type = bytes
+
+    MAXSIZE = sys.maxsize
+else:
+    string_types = basestring,
+    integer_types = (int, long)
+    class_types = (type, types.ClassType)
+    text_type = unicode
+    binary_type = str
+
+    # It's possible to have sizeof(long) != sizeof(Py_ssize_t).
+    class X(object):
+        def __len__(self):
+            return 1 << 31
+    try:
+        len(X())
+    except OverflowError:
+        # 32-bit
+        MAXSIZE = int((1 << 31) - 1)
+    else:
+        # 64-bit
+        MAXSIZE = int((1 << 63) - 1)
+    del X
+
+
+def _add_doc(func, doc):
+    """Add documentation to a function."""
+    func.__doc__ = doc
+
+
+def _import_module(name):
+    """Import module, returning the module after the last dot."""
+    __import__(name)
+    return sys.modules[name]
+
+
+class _LazyDescr(object):
+
+    def __init__(self, name):
+        self.name = name
+
+    def __get__(self, obj, tp):
+        result = self._resolve()
+        setattr(obj, self.name, result)
+        # This is a bit ugly, but it avoids running this again.
+        delattr(tp, self.name)
+        return result
+
+
+class MovedModule(_LazyDescr):
+
+    def __init__(self, name, old, new=None):
+        super(MovedModule, self).__init__(name)
+        if PY3:
+            if new is None:
+                new = name
+            self.mod = new
+        else:
+            self.mod = old
+
+    def _resolve(self):
+        return _import_module(self.mod)
+
+
+class MovedAttribute(_LazyDescr):
+
+    def __init__(self, name, old_mod, new_mod, old_attr=None, new_attr=None):
+        super(MovedAttribute, self).__init__(name)
+        if PY3:
+            if new_mod is None:
+                new_mod = name
+            self.mod = new_mod
+            if new_attr is None:
+                if old_attr is None:
+                    new_attr = name
+                else:
+                    new_attr = old_attr
+            self.attr = new_attr
+        else:
+            self.mod = old_mod
+            if old_attr is None:
+                old_attr = name
+            self.attr = old_attr
+
+    def _resolve(self):
+        module = _import_module(self.mod)
+        return getattr(module, self.attr)
+
+
+
+class _MovedItems(types.ModuleType):
+    """Lazy loading of moved objects"""
+
+
+_moved_attributes = [
+    MovedAttribute("cStringIO", "cStringIO", "io", "StringIO"),
+    MovedAttribute("filter", "itertools", "builtins", "ifilter", "filter"),
+    MovedAttribute("input", "__builtin__", "builtins", "raw_input", "input"),
+    MovedAttribute("map", "itertools", "builtins", "imap", "map"),
+    MovedAttribute("reload_module", "__builtin__", "imp", "reload"),
+    MovedAttribute("reduce", "__builtin__", "functools"),
+    MovedAttribute("StringIO", "StringIO", "io"),
+    MovedAttribute("xrange", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute("zip", "itertools", "builtins", "izip", "zip"),
+
+    MovedModule("builtins", "__builtin__"),
+    MovedModule("configparser", "ConfigParser"),
+    MovedModule("copyreg", "copy_reg"),
+    MovedModule("http_cookiejar", "cookielib", "http.cookiejar"),
+    MovedModule("http_cookies", "Cookie", "http.cookies"),
+    MovedModule("html_entities", "htmlentitydefs", "html.entities"),
+    MovedModule("html_parser", "HTMLParser", "html.parser"),
+    MovedModule("http_client", "httplib", "http.client"),
+    MovedModule("BaseHTTPServer", "BaseHTTPServer", "http.server"),
+    MovedModule("CGIHTTPServer", "CGIHTTPServer", "http.server"),
+    MovedModule("SimpleHTTPServer", "SimpleHTTPServer", "http.server"),
+    MovedModule("cPickle", "cPickle", "pickle"),
+    MovedModule("queue", "Queue"),
+    MovedModule("reprlib", "repr"),
+    MovedModule("socketserver", "SocketServer"),
+    MovedModule("tkinter", "Tkinter"),
+    MovedModule("tkinter_dialog", "Dialog", "tkinter.dialog"),
+    MovedModule("tkinter_filedialog", "FileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_scrolledtext", "ScrolledText", "tkinter.scrolledtext"),
+    MovedModule("tkinter_simpledialog", "SimpleDialog", "tkinter.simpledialog"),
+    MovedModule("tkinter_tix", "Tix", "tkinter.tix"),
+    MovedModule("tkinter_constants", "Tkconstants", "tkinter.constants"),
+    MovedModule("tkinter_dnd", "Tkdnd", "tkinter.dnd"),
+    MovedModule("tkinter_colorchooser", "tkColorChooser",
+                "tkinter.colorchooser"),
+    MovedModule("tkinter_commondialog", "tkCommonDialog",
+                "tkinter.commondialog"),
+    MovedModule("tkinter_tkfiledialog", "tkFileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_font", "tkFont", "tkinter.font"),
+    MovedModule("tkinter_messagebox", "tkMessageBox", "tkinter.messagebox"),
+    MovedModule("tkinter_tksimpledialog", "tkSimpleDialog",
+                "tkinter.simpledialog"),
+    MovedModule("urllib_robotparser", "robotparser", "urllib.robotparser"),
+    MovedModule("winreg", "_winreg"),
+]
+for attr in _moved_attributes:
+    setattr(_MovedItems, attr.name, attr)
+del attr
+
+moves = sys.modules["django.utils.six.moves"] = _MovedItems("moves")
+
+
+def add_move(move):
+    """Add an item to six.moves."""
+    setattr(_MovedItems, move.name, move)
+
+
+def remove_move(name):
+    """Remove item from six.moves."""
+    try:
+        delattr(_MovedItems, name)
+    except AttributeError:
+        try:
+            del moves.__dict__[name]
+        except KeyError:
+            raise AttributeError("no such move, %r" % (name,))
+
+
+if PY3:
+    _meth_func = "__func__"
+    _meth_self = "__self__"
+
+    _func_code = "__code__"
+    _func_defaults = "__defaults__"
+
+    _iterkeys = "keys"
+    _itervalues = "values"
+    _iteritems = "items"
+else:
+    _meth_func = "im_func"
+    _meth_self = "im_self"
+
+    _func_code = "func_code"
+    _func_defaults = "func_defaults"
+
+    _iterkeys = "iterkeys"
+    _itervalues = "itervalues"
+    _iteritems = "iteritems"
+
+
+if PY3:
+    def get_unbound_function(unbound):
+        return unbound
+
+
+    advance_iterator = next
+
+    def callable(obj):
+        return any("__call__" in klass.__dict__ for klass in type(obj).__mro__)
+else:
+    def get_unbound_function(unbound):
+        return unbound.im_func
+
+
+    def advance_iterator(it):
+        return it.next()
+
+    callable = callable
+_add_doc(get_unbound_function,
+         """Get the function out of a possibly unbound function""")
+
+
+get_method_function = operator.attrgetter(_meth_func)
+get_method_self = operator.attrgetter(_meth_self)
+get_function_code = operator.attrgetter(_func_code)
+get_function_defaults = operator.attrgetter(_func_defaults)
+
+
+def iterkeys(d):
+    """Return an iterator over the keys of a dictionary."""
+    return getattr(d, _iterkeys)()
+
+def itervalues(d):
+    """Return an iterator over the values of a dictionary."""
+    return getattr(d, _itervalues)()
+
+def iteritems(d):
+    """Return an iterator over the (key, value) pairs of a dictionary."""
+    return getattr(d, _iteritems)()
+
+
+if PY3:
+    def b(s):
+        return s.encode("latin-1")
+    def u(s):
+        return s
+    if sys.version_info[1] <= 1:
+        def int2byte(i):
+            return bytes((i,))
+    else:
+        # This is about 2x faster than the implementation above on 3.2+
+        int2byte = operator.methodcaller("to_bytes", 1, "big")
+    import io
+    StringIO = io.StringIO
+    BytesIO = io.BytesIO
+else:
+    def b(s):
+        return s
+    def u(s):
+        return unicode(s, "unicode_escape")
+    int2byte = chr
+    import StringIO
+    StringIO = BytesIO = StringIO.StringIO
+_add_doc(b, """Byte literal""")
+_add_doc(u, """Text literal""")
+
+
+if PY3:
+    import builtins
+    exec_ = getattr(builtins, "exec")
+
+
+    def reraise(tp, value, tb=None):
+        if value.__traceback__ is not tb:
+            raise value.with_traceback(tb)
+        raise value
+
+
+    print_ = getattr(builtins, "print")
+    del builtins
+
+else:
+    def exec_(code, globs=None, locs=None):
+        """Execute code in a namespace."""
+        if globs is None:
+            frame = sys._getframe(1)
+            globs = frame.f_globals
+            if locs is None:
+                locs = frame.f_locals
+            del frame
+        elif locs is None:
+            locs = globs
+        exec("""exec code in globs, locs""")
+
+
+    exec_("""def reraise(tp, value, tb=None):
+    raise tp, value, tb
+""")
+
+
+    def print_(*args, **kwargs):
+        """The new-style print function."""
+        fp = kwargs.pop("file", sys.stdout)
+        if fp is None:
+            return
+        def write(data):
+            if not isinstance(data, basestring):
+                data = str(data)
+            fp.write(data)
+        want_unicode = False
+        sep = kwargs.pop("sep", None)
+        if sep is not None:
+            if isinstance(sep, unicode):
+                want_unicode = True
+            elif not isinstance(sep, str):
+                raise TypeError("sep must be None or a string")
+        end = kwargs.pop("end", None)
+        if end is not None:
+            if isinstance(end, unicode):
+                want_unicode = True
+            elif not isinstance(end, str):
+                raise TypeError("end must be None or a string")
+        if kwargs:
+            raise TypeError("invalid keyword arguments to print()")
+        if not want_unicode:
+            for arg in args:
+                if isinstance(arg, unicode):
+                    want_unicode = True
+                    break
+        if want_unicode:
+            newline = unicode("\n")
+            space = unicode(" ")
+        else:
+            newline = "\n"
+            space = " "
+        if sep is None:
+            sep = space
+        if end is None:
+            end = newline
+        for i, arg in enumerate(args):
+            if i:
+                write(sep)
+            write(arg)
+        write(end)
+
+_add_doc(reraise, """Reraise an exception.""")
+
+
+def with_metaclass(meta, base=object):
+    """Create a base class with a metaclass."""
+    return meta("NewBase", (base,), {})
+
+
+### Additional customizations for Django ###
+
+if PY3:
+    _iterlists = "lists"
+else:
+    _iterlists = "iterlists"
+
+def iterlists(d):
+    """Return an iterator over the values of a MultiValueDict."""
+    return getattr(d, _iterlists)()
+
+
+add_move(MovedModule("_dummy_thread", "dummy_thread"))
+add_move(MovedModule("_thread", "thread"))
diff --git a/feedgenerator/django/utils/timezone.py b/feedgenerator/django/utils/timezone.py
new file mode 100644
index 0000000..c125487
--- /dev/null
+++ b/feedgenerator/django/utils/timezone.py
@@ -0,0 +1,292 @@
+"""Timezone helper functions.
+
+This module uses pytz when it's available and fallbacks when it isn't.
+"""
+
+from datetime import datetime, timedelta, tzinfo
+from threading import local
+import time as _time
+
+try:
+    import pytz
+except ImportError:
+    pytz = None
+
+# ### from django.conf import settings
+from . import six
+
+__all__ = [
+    'utc', 'get_default_timezone', 'get_current_timezone',
+    'activate', 'deactivate', 'override',
+    'is_naive', 'is_aware', 'make_aware', 'make_naive',
+]
+
+
+# UTC and local time zones
+
+ZERO = timedelta(0)
+
+class UTC(tzinfo):
+    """
+    UTC implementation taken from Python's docs.
+
+    Used only when pytz isn't available.
+    """
+
+    def __repr__(self):
+        return "<UTC>"
+
+    def utcoffset(self, dt):
+        return ZERO
+
+    def tzname(self, dt):
+        return "UTC"
+
+    def dst(self, dt):
+        return ZERO
+
+class LocalTimezone(tzinfo):
+    """
+    Local time implementation taken from Python's docs.
+
+    Used only when pytz isn't available, and most likely inaccurate. If you're
+    having trouble with this class, don't waste your time, just install pytz.
+    """
+
+    def __init__(self):
+        # This code is moved in __init__ to execute it as late as possible
+        # See get_default_timezone().
+        self.STDOFFSET = timedelta(seconds=-_time.timezone)
+        if _time.daylight:
+            self.DSTOFFSET = timedelta(seconds=-_time.altzone)
+        else:
+            self.DSTOFFSET = self.STDOFFSET
+        self.DSTDIFF = self.DSTOFFSET - self.STDOFFSET
+        tzinfo.__init__(self)
+
+    def __repr__(self):
+        return "<LocalTimezone>"
+
+    def utcoffset(self, dt):
+        if self._isdst(dt):
+            return self.DSTOFFSET
+        else:
+            return self.STDOFFSET
+
+    def dst(self, dt):
+        if self._isdst(dt):
+            return self.DSTDIFF
+        else:
+            return ZERO
+
+    def tzname(self, dt):
+        return _time.tzname[self._isdst(dt)]
+
+    def _isdst(self, dt):
+        tt = (dt.year, dt.month, dt.day,
+              dt.hour, dt.minute, dt.second,
+              dt.weekday(), 0, 0)
+        stamp = _time.mktime(tt)
+        tt = _time.localtime(stamp)
+        return tt.tm_isdst > 0
+
+
+utc = pytz.utc if pytz else UTC()
+"""UTC time zone as a tzinfo instance."""
+
+# ### # In order to avoid accessing the settings at compile time,
+# ### # wrap the expression in a function and cache the result.
+# ### _localtime = None
+# ### 
+# ### def get_default_timezone():
+# ###     """
+# ###     Returns the default time zone as a tzinfo instance.
+# ### 
+# ###     This is the time zone defined by settings.TIME_ZONE.
+# ### 
+# ###     See also :func:`get_current_timezone`.
+# ###     """
+# ###     global _localtime
+# ###     if _localtime is None:
+# ###         if isinstance(settings.TIME_ZONE, six.string_types) and pytz is not None:
+# ###             _localtime = pytz.timezone(settings.TIME_ZONE)
+# ###         else:
+# ###             _localtime = LocalTimezone()
+# ###     return _localtime
+
+# This function exists for consistency with get_current_timezone_name
+def get_default_timezone_name():
+    """
+    Returns the name of the default time zone.
+    """
+    return _get_timezone_name(get_default_timezone())
+
+_active = local()
+
+def get_current_timezone():
+    """
+    Returns the currently active time zone as a tzinfo instance.
+    """
+    return getattr(_active, "value", get_default_timezone())
+
+def get_current_timezone_name():
+    """
+    Returns the name of the currently active time zone.
+    """
+    return _get_timezone_name(get_current_timezone())
+
+def _get_timezone_name(timezone):
+    """
+    Returns the name of ``timezone``.
+    """
+    try:
+        # for pytz timezones
+        return timezone.zone
+    except AttributeError:
+        # for regular tzinfo objects
+        local_now = datetime.now(timezone)
+        return timezone.tzname(local_now)
+
+# Timezone selection functions.
+
+# These functions don't change os.environ['TZ'] and call time.tzset()
+# because it isn't thread safe.
+
+def activate(timezone):
+    """
+    Sets the time zone for the current thread.
+
+    The ``timezone`` argument must be an instance of a tzinfo subclass or a
+    time zone name. If it is a time zone name, pytz is required.
+    """
+    if isinstance(timezone, tzinfo):
+        _active.value = timezone
+    elif isinstance(timezone, six.string_types) and pytz is not None:
+        _active.value = pytz.timezone(timezone)
+    else:
+        raise ValueError("Invalid timezone: %r" % timezone)
+
+def deactivate():
+    """
+    Unsets the time zone for the current thread.
+
+    Django will then use the time zone defined by settings.TIME_ZONE.
+    """
+    if hasattr(_active, "value"):
+        del _active.value
+
+class override(object):
+    """
+    Temporarily set the time zone for the current thread.
+
+    This is a context manager that uses ``~django.utils.timezone.activate()``
+    to set the timezone on entry, and restores the previously active timezone
+    on exit.
+
+    The ``timezone`` argument must be an instance of a ``tzinfo`` subclass, a
+    time zone name, or ``None``. If is it a time zone name, pytz is required.
+    If it is ``None``, Django enables the default time zone.
+    """
+    def __init__(self, timezone):
+        self.timezone = timezone
+        self.old_timezone = getattr(_active, 'value', None)
+
+    def __enter__(self):
+        if self.timezone is None:
+            deactivate()
+        else:
+            activate(self.timezone)
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        if self.old_timezone is not None:
+            _active.value = self.old_timezone
+        else:
+            del _active.value
+
+
+# ### # Templates
+# ### 
+# ### def template_localtime(value, use_tz=None):
+# ###     """
+# ###     Checks if value is a datetime and converts it to local time if necessary.
+# ### 
+# ###     If use_tz is provided and is not None, that will force the value to
+# ###     be converted (or not), overriding the value of settings.USE_TZ.
+# ### 
+# ###     This function is designed for use by the template engine.
+# ###     """
+# ###     should_convert = (isinstance(value, datetime)
+# ###         and (settings.USE_TZ if use_tz is None else use_tz)
+# ###         and not is_naive(value)
+# ###         and getattr(value, 'convert_to_local_time', True))
+# ###     return localtime(value) if should_convert else value
+
+
+# Utilities
+
+def localtime(value, timezone=None):
+    """
+    Converts an aware datetime.datetime to local time.
+
+    Local time is defined by the current time zone, unless another time zone
+    is specified.
+    """
+    if timezone is None:
+        timezone = get_current_timezone()
+    value = value.astimezone(timezone)
+    if hasattr(timezone, 'normalize'):
+        # available for pytz time zones
+        value = timezone.normalize(value)
+    return value
+
+# ### def now():
+# ###     """
+# ###     Returns an aware or naive datetime.datetime, depending on settings.USE_TZ.
+# ###     """
+# ###     if settings.USE_TZ:
+# ###         # timeit shows that datetime.now(tz=utc) is 24% slower
+# ###         return datetime.utcnow().replace(tzinfo=utc)
+# ###     else:
+# ###         return datetime.now()
+
+# By design, these four functions don't perform any checks on their arguments.
+# The caller should ensure that they don't receive an invalid value like None.
+
+def is_aware(value):
+    """
+    Determines if a given datetime.datetime is aware.
+
+    The logic is described in Python's docs:
+    http://docs.python.org/library/datetime.html#datetime.tzinfo
+    """
+    return value.tzinfo is not None and value.tzinfo.utcoffset(value) is not None
+
+def is_naive(value):
+    """
+    Determines if a given datetime.datetime is naive.
+
+    The logic is described in Python's docs:
+    http://docs.python.org/library/datetime.html#datetime.tzinfo
+    """
+    return value.tzinfo is None or value.tzinfo.utcoffset(value) is None
+
+def make_aware(value, timezone):
+    """
+    Makes a naive datetime.datetime in a given time zone aware.
+    """
+    if hasattr(timezone, 'localize'):
+        # available for pytz time zones
+        return timezone.localize(value, is_dst=None)
+    else:
+        # may be wrong around DST changes
+        return value.replace(tzinfo=timezone)
+
+def make_naive(value, timezone):
+    """
+    Makes an aware datetime.datetime naive in a given time zone.
+    """
+    value = value.astimezone(timezone)
+    if hasattr(timezone, 'normalize'):
+        # available for pytz time zones
+        value = timezone.normalize(value)
+    return value.replace(tzinfo=None)
diff --git a/feedgenerator/django/utils/xmlutils.py b/feedgenerator/django/utils/xmlutils.py
new file mode 100644
index 0000000..a1eb5fb
--- /dev/null
+++ b/feedgenerator/django/utils/xmlutils.py
@@ -0,0 +1,14 @@
+"""
+Utilities for XML generation/parsing.
+"""
+
+from xml.sax.saxutils import XMLGenerator
+
+class SimplerXMLGenerator(XMLGenerator):
+    def addQuickElement(self, name, contents=None, attrs=None):
+        "Convenience method for adding an element with no children"
+        if attrs is None: attrs = {}
+        self.startElement(name, attrs)
+        if contents is not None:
+            self.characters(contents)
+        self.endElement(name)