228 lines
6.9 KiB
Python
228 lines
6.9 KiB
Python
#!/usr/bin/env python
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import os.path
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import re
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import json
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from fnmatch import fnmatch
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import lxml.html
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from . import feeds
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from . import crawler
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try:
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from ConfigParser import ConfigParser
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from urlparse import urljoin
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from httplib import HTTPException
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except ImportError:
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from configparser import ConfigParser
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from urllib.parse import urljoin
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from http.client import HTTPException
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try:
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basestring
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except NameError:
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basestring = str
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def to_class(query):
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pattern = r'\[class=([^\]]+)\]'
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repl = r'[@class and contains(concat(" ", normalize-space(@class), " "), " \1 ")]'
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return re.sub(pattern, repl, query)
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def get_rule(link):
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config = ConfigParser()
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config.read(os.path.join(os.path.dirname(__file__), 'feedify.ini'))
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for section in config.sections():
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values = dict(config.items(section))
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values['path'] = values['path'].split('\n')[1:]
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for path in values['path']:
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if fnmatch(link, path):
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return values
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return False
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def supported(link):
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return get_rule(link) is not False
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def format_string(string, getter, error=False):
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out = ""
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char = string[0]
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follow = string[1:]
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if char == '"':
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match = follow.partition('"')
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out = match[0]
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if len(match) >= 2:
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next_match = match[2]
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else:
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next_match = None
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elif char == '{':
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match = follow.partition('}')
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try:
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test = format_string(match[0], getter, True)
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except (ValueError, KeyError):
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pass
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else:
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out = test
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next_match = match[2]
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elif char == ' ':
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next_match = follow
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elif re.search(r'^([^{}<>" ]+)(?:<"([^>]+)">)?(.*)$', string):
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match = re.search(r'^([^{}<>" ]+)(?:<"([^>]+)">)?(.*)$', string).groups()
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raw_value = getter(match[0])
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if not isinstance(raw_value, basestring):
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if match[1] is not None:
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out = match[1].join(raw_value)
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else:
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out = ''.join(raw_value)
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if not out and error:
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raise ValueError
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next_match = match[2]
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else:
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raise ValueError('bogus string')
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if next_match is not None and len(next_match):
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return out + format_string(next_match, getter, error)
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else:
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return out
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def pre_worker(url):
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if url.startswith('http://itunes.apple.com/') or url.startswith('https://itunes.apple.com/'):
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match = re.search('/id([0-9]+)(\?.*)?$', url)
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if match:
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iid = match.groups()[0]
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redirect = 'https://itunes.apple.com/lookup?id=%s' % iid
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try:
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con = crawler.custom_handler(basic=True).open(redirect, timeout=4)
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data = con.read()
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except (IOError, HTTPException):
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raise
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return json.loads(data.decode('utf-8', 'replace'))['results'][0]['feedUrl']
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return None
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class Builder(object):
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def __init__(self, link, data, rule=None):
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# data must be a unicode string
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self.link = link
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self.data = data
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self.rule = rule
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self.encoding = crawler.detect_encoding(self.data)
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if isinstance(self.data, bytes):
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self.data = self.data.decode(crawler.detect_encoding(self.data), 'replace')
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if self.rule is None:
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self.rule = get_rule(link)
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if self.rule['mode'] == 'xpath':
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self.doc = lxml.html.fromstring(self.data)
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elif self.rule['mode'] == 'json':
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self.doc = json.loads(self.data)
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self.feed = feeds.FeedParserAtom()
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def raw(self, html, expr):
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" Returns selected items, thru a stupid query "
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if self.rule['mode'] == 'xpath':
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return html.xpath(to_class(expr))
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elif self.rule['mode'] == 'json':
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a = [html]
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b = []
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for x in expr.strip(".").split("."):
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match = re.search('^([^\[]+)(?:\[([0-9]+)\])?$', x).groups()
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for elem in a:
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if isinstance(elem, dict):
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kids = elem.get(match[0])
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if kids is None:
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pass
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elif isinstance(kids, list):
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b += kids
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elif isinstance(kids, basestring):
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b.append(kids.replace('\n', '<br/>'))
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else:
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b.append(kids)
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if match[1] is None:
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a = b
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else:
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if len(b) - 1 >= int(match[1]):
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a = [b[int(match[1])]]
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else:
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a = []
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b = []
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return a
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def strings(self, html, expr):
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" Turns the results of raw() into a nice array of strings (ie. sth useful) "
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if self.rule['mode'] == 'xpath':
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out = []
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for match in self.raw(html, expr):
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if isinstance(match, basestring):
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out.append(match)
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elif isinstance(match, lxml.html.HtmlElement):
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out.append(lxml.html.tostring(match))
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elif self.rule['mode'] == 'json':
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out = self.raw(html, expr)
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out = [x.decode(self.encoding) if isinstance(x, bytes) else x for x in out]
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return out
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def string(self, html, expr):
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" Makes a formatted string, using our custom template format, out of the getter and rule "
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getter = lambda x: self.strings(html, x)
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return format_string(self.rule[expr], getter)
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def build(self):
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" Builds the actual rss feed "
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if 'title' in self.rule:
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self.feed.title = self.string(self.doc, 'title')
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if 'items' in self.rule:
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matches = self.raw(self.doc, self.rule['items'])
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if matches and len(matches):
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for item in matches:
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feed_item = {}
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if 'item_title' in self.rule:
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feed_item['title'] = self.string(item, 'item_title')
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if 'item_link' in self.rule:
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url = self.string(item, 'item_link')
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if url:
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url = urljoin(self.link, url)
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feed_item['link'] = url
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if 'item_desc' in self.rule:
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feed_item['desc'] = self.string(item, 'item_desc')
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if 'item_content' in self.rule:
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feed_item['content'] = self.string(item, 'item_content')
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if 'item_time' in self.rule:
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feed_item['updated'] = self.string(item, 'item_time')
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if 'item_id' in self.rule:
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feed_item['id'] = self.string(item, 'item_id')
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feed_item['is_permalink'] = False
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self.feed.items.append(feed_item)
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