Primer commit del proyecto RSS

venv/lib/python3.12/site-packages/feedparser/datetimes/w3dtf.py

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+# Copyright 2010-2023 Kurt McKee <contactme@kurtmckee.org>
+# Copyright 2002-2008 Mark Pilgrim
+# All rights reserved.
+#
+# This file is a part of feedparser.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# * Redistributions of source code must retain the above copyright notice,
+#   this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above copyright notice,
+#   this list of conditions and the following disclaimer in the documentation
+#   and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 'AS IS'
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+
+import datetime
+
+timezonenames = {
+    'ut': 0, 'gmt': 0, 'z': 0,
+    'adt': -3, 'ast': -4, 'at': -4,
+    'edt': -4, 'est': -5, 'et': -5,
+    'cdt': -5, 'cst': -6, 'ct': -6,
+    'mdt': -6, 'mst': -7, 'mt': -7,
+    'pdt': -7, 'pst': -8, 'pt': -8,
+    'a': -1, 'n': 1,
+    'm': -12, 'y': 12,
+}
+# W3 date and time format parser
+# http://www.w3.org/TR/NOTE-datetime
+# Also supports MSSQL-style datetimes as defined at:
+# http://msdn.microsoft.com/en-us/library/ms186724.aspx
+# (basically, allow a space as a date/time/timezone separator)
+
+
+def _parse_date_w3dtf(datestr):
+    if not datestr.strip():
+        return None
+    parts = datestr.lower().split('t')
+    if len(parts) == 1:
+        # This may be a date only, or may be an MSSQL-style date
+        parts = parts[0].split()
+        if len(parts) == 1:
+            # Treat this as a date only
+            parts.append('00:00:00z')
+    elif len(parts) > 2:
+        return None
+    date = parts[0].split('-', 2)
+    if not date or len(date[0]) != 4:
+        return None
+    # Ensure that `date` has 3 elements. Using '1' sets the default
+    # month to January and the default day to the 1st of the month.
+    date.extend(['1'] * (3 - len(date)))
+    try:
+        year, month, day = [int(i) for i in date]
+    except ValueError:
+        # `date` may have more than 3 elements or may contain
+        # non-integer strings.
+        return None
+    if parts[1].endswith('z'):
+        parts[1] = parts[1][:-1]
+        parts.append('z')
+    # Append the numeric timezone offset, if any, to parts.
+    # If this is an MSSQL-style date then parts[2] already contains
+    # the timezone information, so `append()` will not affect it.
+    # Add 1 to each value so that if `find()` returns -1 it will be
+    # treated as False.
+    loc = parts[1].find('-') + 1 or parts[1].find('+') + 1 or len(parts[1]) + 1
+    loc = loc - 1
+    parts.append(parts[1][loc:])
+    parts[1] = parts[1][:loc]
+    time = parts[1].split(':', 2)
+    # Ensure that time has 3 elements. Using '0' means that the
+    # minutes and seconds, if missing, will default to 0.
+    time.extend(['0'] * (3 - len(time)))
+    if parts[2][:1] in ('-', '+'):
+        try:
+            tzhour = int(parts[2][1:3])
+            tzmin = int(parts[2][4:])
+        except ValueError:
+            return None
+        if parts[2].startswith('-'):
+            tzhour = tzhour * -1
+            tzmin = tzmin * -1
+    else:
+        tzhour = timezonenames.get(parts[2], 0)
+        tzmin = 0
+    try:
+        hour, minute, second = [int(float(i)) for i in time]
+    except ValueError:
+        return None
+    # Create the datetime object and timezone delta objects
+    try:
+        stamp = datetime.datetime(year, month, day, hour, minute, second)
+    except ValueError:
+        return None
+    delta = datetime.timedelta(0, 0, 0, 0, tzmin, tzhour)
+    # Return the date and timestamp in a UTC 9-tuple
+    try:
+        return (stamp - delta).utctimetuple()
+    except (OverflowError, ValueError):
+        # IronPython throws ValueErrors instead of OverflowErrors
+        return None