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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
'''
featherweight – A lightweight terminal news feed reader
Copyright © 2013 Mattias Andrée (maandree@member.fsf.org)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
'''
import xml.parsers.expat
def parse_feed(feed):
'''
Parse a feed file
@param feed:str The raw content of the feed file
@return :list<dict> The feed parsed, one dictionary per channel
'''
parser = xml.parsers.expat.ParserCreate()
global is_rss, feeds, root, item, text, is_atom, attrs
is_rss = False
is_atom = False
feeds = []
root = None
item = None
text = None
def rss_date(value):
value = value.replace('\t', ' ').replace('\n', ' ').replace('\r', ' ')
while value.startswith(' '):
value = value[1:]
while value.endswith(' '):
value = value[:-1]
while ' ' in value:
value = value.replace(' ', ' ')
value = value.replace(':', ' ').split(' ')
(_, day, month, year, hour, minute, second, offset) = value
offsign, offhour, offmin = offset[0] == '+', offset[1 : 3], offset[3 : 5]
year, month, day = int(year), month.lower(), int(day)
hour, minute, second = int(hour), int(minute), int(second)
offhour, offmin = int(offhour), int(offmin)
months = ['', 'jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug', 'sep', 'oct', 'nov', 'dec']
for m in range(len(months)):
if month == months[m]:
month = m
break
if offsign:
hour += offhour
minute += offmin
else:
hour -= offhour
minute -= offmin
while minute < 0:
hour -= 1
minute += 60
if minute >= 60:
hour += minute // 60
minute %= 60
while hour < 0:
day -= 1
hour += 24
if hour >= 24:
day += hour // 24
hour %= 24
mds = [0, 31, 30, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
while day <= 0:
month -= 1
if month <= 0:
month += 12
year -= 1
day += mds[month]
while day > mds[month]:
day -= mds[month]
month += 1
if month > 12:
month -= 12
year += 1
return [year, month, day, hour, minute, day]
def atom_date(value):
value = value.replace(' ', '').replace('\t', '').replace('\n', '').replace('\r', '')
value = value.replace('+', 'T+').replace('-', 'T-').replace('Z', 'T+0000')
(year, month, day) = value.split('T')[0].split('-')
(hour, minute, second) = value.split('T')[1].split(':')
offset = value.split('T')[2]
offsign, offhour, offmin = offset[0] == '+', offset[1 : 3], offset[3 : 5]
year, month, day = int(year), int(month), int(day)
hour, minute, second = int(hour), int(minute), int(second)
offhour, offmin = int(offhour), int(offmin)
if offsign:
hour += offhour
minute += offmin
else:
hour -= offhour
minute -= offmin
while minute < 0:
hour -= 1
minute += 60
if minute >= 60:
hour += minute // 60
minute %= 60
while hour < 0:
day -= 1
hour += 24
if hour >= 24:
day += hour // 24
hour %= 24
mds = [0, 31, 30, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
while day <= 0:
month -= 1
if month <= 0:
month += 12
year -= 1
day += mds[month]
while day > mds[month]:
day -= mds[month]
month += 1
if month > 12:
month -= 12
year += 1
return [year, month, day, hour, minute, day]
def start_element(name, attributes):
global is_rss, feeds, root, item, text, is_atom, attrs
attrs = attributes
name = name.lower()
if is_rss:
if root is None:
if name == 'channel':
root = {'items' : []}
else:
if item is None:
if name == 'item':
item = {}
elif is_atom:
if item is None:
if name == 'entry':
item = {}
elif name == 'rss':
is_rss = True
elif name == 'feed':
is_atom = True
root = {'items' : []}
text = ''
def end_element(name):
global is_rss, feeds, root, item, text, is_atom, attrs
name = name.lower()
if (root is not None) and is_rss:
if item is not None:
if name == 'item':
root['items'].append(item)
item = None
elif name in ('title', 'description', 'link', 'guid'):
item[name] = text
elif name == 'pubdate':
item['pubdate'] = rss_date(text)
else:
if name in ('title', 'description', 'link'):
root[name] = text
elif name == 'channel':
feeds.append(root)
root = None
elif name == 'rss':
is_rss = False
elif (root is not None) and is_atom:
if item is not None:
if name == 'entry':
root['items'].append(item)
item = None
elif name == 'title':
item['title'] = text
elif name == 'id':
item['guid'] = text
elif name == 'summary':
if 'description' not in item:
item['description'] = text
elif name == 'content':
item['description'] = text
elif name == 'link':
if 'rel' not in attrs:
item['link'] = text
elif name == 'updated':
item['pubdate'] = atom_date(text)
else:
if name == 'title':
root['title'] = text
elif name == 'subtitle':
root['description'] = text
elif name == 'link':
if 'rel' not in attrs:
root['link'] = text
elif name == 'feed':
feeds.append(root)
root = None
is_atom = False
text = None
def char_data(data):
global text
if text is not None:
text += data
parser.StartElementHandler = start_element
parser.EndElementHandler = end_element
parser.CharacterDataHandler = char_data
parser.Parse(feed, True)
return feeds
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