795 lines
20 KiB
Python
795 lines
20 KiB
Python
import sys
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import os
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import os.path
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import time
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import threading
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from fnmatch import fnmatch
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import re
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import lxml.etree
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import lxml.html
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from bs4 import BeautifulSoup
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from . import feeds
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from . import crawler
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from . import readabilite
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import wsgiref.simple_server
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import wsgiref.handlers
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import cgitb
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try:
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# python 2
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from Queue import Queue
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from httplib import HTTPException
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from urllib import unquote
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from urlparse import urlparse, urljoin, parse_qs
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except ImportError:
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# python 3
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from queue import Queue
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from http.client import HTTPException
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from urllib.parse import unquote
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from urllib.parse import urlparse, urljoin, parse_qs
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LIM_ITEM = 100 # deletes what's beyond
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LIM_TIME = 7 # deletes what's after
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MAX_ITEM = 50 # cache-only beyond
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MAX_TIME = 7 # cache-only after (in sec)
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DELAY = 10 * 60 # xml cache & ETag cache (in sec)
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TIMEOUT = 4 # http timeout (in sec)
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THREADS = 10 # number of threads (1 for single-threaded)
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DEBUG = False
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PORT = 8080
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PROTOCOL = ['http', 'https']
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def filterOptions(options):
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return options
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# example of filtering code below
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#allowed = ['proxy', 'clip', 'cache', 'force', 'silent', 'pro', 'debug']
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#filtered = dict([(key,value) for (key,value) in options.items() if key in allowed])
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#return filtered
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class MorssException(Exception):
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pass
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def log(txt, force=False):
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if DEBUG or force:
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if 'REQUEST_URI' in os.environ:
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open('morss.log', 'a').write("%s\n" % repr(txt))
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else:
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print(repr(txt))
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def len_html(txt):
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if len(txt):
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return len(lxml.html.fromstring(txt).text_content())
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else:
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return 0
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def count_words(txt):
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if len(txt):
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return len(lxml.html.fromstring(txt).text_content().split())
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return 0
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class Options:
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def __init__(self, options=None, **args):
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if len(args):
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self.options = args
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self.options.update(options or {})
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else:
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self.options = options or {}
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def __getattr__(self, key):
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if key in self.options:
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return self.options[key]
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else:
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return False
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def __setitem__(self, key, value):
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self.options[key] = value
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def __contains__(self, key):
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return key in self.options
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def parseOptions(options):
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""" Turns ['md=True'] into {'md':True} """
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out = {}
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for option in options:
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split = option.split('=', 1)
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if len(split) > 1:
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if split[0].lower() == 'true':
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out[split[0]] = True
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elif split[0].lower() == 'false':
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out[split[0]] = False
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else:
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out[split[0]] = split[1]
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else:
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out[split[0]] = True
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return out
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def ItemFix(item, feedurl='/'):
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""" Improves feed items (absolute links, resolve feedburner links, etc) """
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# check unwanted uppercase title
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if len(item.title) > 20 and item.title.isupper():
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item.title = item.title.title()
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# check if it includes link
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if not item.link:
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log('no link')
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return item
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# wikipedia daily highlight
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if fnmatch(feedurl, 'http*://*.wikipedia.org/w/api.php?*&feedformat=atom'):
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match = lxml.html.fromstring(item.desc).xpath('//b/a/@href')
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if len(match):
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item.link = match[0]
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log(item.link)
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# check relative urls
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item.link = urljoin(feedurl, item.link)
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# google translate
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if fnmatch(item.link, 'http://translate.google.*/translate*u=*'):
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item.link = parse_qs(urlparse(item.link).query)['u'][0]
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log(item.link)
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# google
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if fnmatch(item.link, 'http://www.google.*/url?q=*'):
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item.link = parse_qs(urlparse(item.link).query)['q'][0]
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log(item.link)
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# google news
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if fnmatch(item.link, 'http://news.google.com/news/url*url=*'):
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item.link = parse_qs(urlparse(item.link).query)['url'][0]
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log(item.link)
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# pocket
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if fnmatch(item.link, 'https://getpocket.com/redirect?url=*'):
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item.link = parse_qs(urlparse(item.link).query)['url'][0]
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log(item.link)
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# facebook
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if fnmatch(item.link, 'https://www.facebook.com/l.php?u=*'):
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item.link = parse_qs(urlparse(item.link).query)['u'][0]
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log(item.link)
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# feedburner FIXME only works if RSS...
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item.NSMAP['feedburner'] = 'http://rssnamespace.org/feedburner/ext/1.0'
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match = item.rule_str('feedburner:origLink')
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if match:
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item.link = match
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# feedsportal
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match = re.search('/([0-9a-zA-Z]{20,})/story01.htm$', item.link)
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if match:
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url = match.groups()[0].split('0')
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t = {'A': '0', 'B': '.', 'C': '/', 'D': '?', 'E': '-', 'F': '=',
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'G': '&', 'H': ',', 'I': '_', 'J': '%', 'K': '+', 'L': 'http://',
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'M': 'https://', 'N': '.com', 'O': '.co.uk', 'P': ';', 'Q': '|',
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'R': ':', 'S': 'www.', 'T': '#', 'U': '$', 'V': '~', 'W': '!',
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'X': '(', 'Y': ')', 'Z': 'Z'}
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item.link = ''.join([(t[s[0]] if s[0] in t else s[0]) + s[1:] for s in url[1:]])
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log(item.link)
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# reddit
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if urlparse(feedurl).netloc == 'www.reddit.com':
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match = lxml.html.fromstring(item.desc).xpath('//a[text()="[link]"]/@href')
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if len(match):
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item.link = match[0]
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log(item.link)
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return item
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def ItemFill(item, options, feedurl='/', fast=False):
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""" Returns True when it has done its best """
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if not item.link:
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log('no link')
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return item
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log(item.link)
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link = item.link
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# twitter
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if urlparse(feedurl).netloc == 'twitter.com':
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match = lxml.html.fromstring(item.desc).xpath('//a/@data-expanded-url')
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if len(match):
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link = match[0]
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log(link)
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else:
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link = None
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# facebook
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if urlparse(feedurl).netloc == 'graph.facebook.com':
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match = lxml.html.fromstring(item.content).xpath('//a/@href')
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if len(match) and urlparse(match[0]).netloc != 'www.facebook.com':
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link = match[0]
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log(link)
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else:
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link = None
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if link is None:
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log('no used link')
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return True
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# download
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delay = -1
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if fast:
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# super-fast mode
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delay = -2
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try:
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con = crawler.custom_handler(delay=delay, encoding=options.encoding).open(link, timeout=TIMEOUT)
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data = con.read()
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except (IOError, HTTPException) as e:
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log('http error')
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return False # let's just delete errors stuff when in cache mode
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contenttype = con.info().get('Content-Type', '').split(';')[0]
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if contenttype not in crawler.MIMETYPE['html'] and contenttype != 'text/plain':
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log('non-text page')
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return True
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out = readabilite.get_article(data, link, options.encoding or crawler.detect_encoding(data, con))
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if out is not None:
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item.content = out
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return True
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def ItemBefore(item, options):
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# return None if item deleted
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if options.search:
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if options.search not in item.title:
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item.remove()
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return None
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return item
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def ItemAfter(item, options):
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if options.clip and item.desc and item.content:
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item.content = item.desc + "<br/><br/><center>* * *</center><br/><br/>" + item.content
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del item.desc
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if options.nolink and item.content:
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content = lxml.html.fromstring(item.content)
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for link in content.xpath('//a'):
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log(link.text_content())
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link.drop_tag()
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item.content = lxml.etree.tostring(content)
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if options.noref:
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item.link = ''
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return item
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def UrlFix(url):
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if url is None:
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raise MorssException('No url provided')
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if isinstance(url, bytes):
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url = url.decode()
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if urlparse(url).scheme not in PROTOCOL:
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url = 'http://' + url
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log(url)
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url = url.replace(' ', '%20')
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return url
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def FeedFetch(url, options):
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# fetch feed
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delay = DELAY
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if options.theforce:
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delay = 0
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try:
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con = crawler.custom_handler(follow='rss', delay=delay, encoding=options.encoding) \
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.open(url, timeout=TIMEOUT * 2)
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xml = con.read()
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except (IOError, HTTPException):
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raise MorssException('Error downloading feed')
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contenttype = con.info().get('Content-Type', '').split(';')[0]
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if options.items:
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# using custom rules
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rss = feeds.FeedHTML(xml)
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rss.rules['title'] = options.title if options.title else '//head/title'
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rss.rules['desc'] = options.desc if options.desc else '//head/meta[@name="description"]/@content'
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rss.rules['items'] = options.items
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rss.rules['item_title'] = options.item_title if options.item_title else './/a|.'
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rss.rules['item_link'] = options.item_link if options.item_link else './@href|.//a/@href'
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if options.item_content:
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rss.rules['item_content'] = options.item_content
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if options.item_time:
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rss.rules['item_time'] = options.item_time
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rss = rss.convert(feeds.FeedXML)
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else:
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try:
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rss = feeds.parse(xml, url, contenttype)
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rss = rss.convert(feeds.FeedXML)
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# contains all fields, otherwise much-needed data can be lost
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except TypeError:
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log('random page')
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log(contenttype)
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raise MorssException('Link provided is not a valid feed')
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return rss
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def FeedGather(rss, url, options):
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size = len(rss.items)
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start_time = time.time()
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# custom settings
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lim_item = LIM_ITEM
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lim_time = LIM_TIME
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max_item = MAX_ITEM
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max_time = MAX_TIME
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threads = THREADS
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if options.cache:
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max_time = 0
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if options.mono:
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threads = 1
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# set
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def runner(queue):
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while True:
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value = queue.get()
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try:
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worker(*value)
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except Exception as e:
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log('Thread Error: %s' % e.message)
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queue.task_done()
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def worker(i, item):
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if time.time() - start_time > lim_time >= 0 or i + 1 > lim_item >= 0:
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log('dropped')
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item.remove()
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return
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item = ItemBefore(item, options)
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if item is None:
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return
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item = ItemFix(item, url)
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if time.time() - start_time > max_time >= 0 or i + 1 > max_item >= 0:
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if not options.proxy:
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if ItemFill(item, options, url, True) is False:
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item.remove()
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return
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else:
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if not options.proxy:
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ItemFill(item, options, url)
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item = ItemAfter(item, options)
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queue = Queue()
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for i in range(threads):
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t = threading.Thread(target=runner, args=(queue,))
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t.daemon = True
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t.start()
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for i, item in enumerate(list(rss.items)):
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if threads == 1:
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worker(*[i, item])
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else:
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queue.put([i, item])
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if threads != 1:
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queue.join()
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if options.ad:
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new = rss.items.append()
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new.title = "Are you hungry?"
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new.desc = "Eat some Galler chocolate :)"
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new.link = "http://www.galler.com/"
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new.time = "5 Oct 2013 22:42"
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log(len(rss.items))
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log(time.time() - start_time)
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return rss
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def FeedFormat(rss, options, encoding='utf-8'):
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if options.callback:
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if re.match(r'^[a-zA-Z0-9\.]+$', options.callback) is not None:
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out = '%s(%s)' % (options.callback, rss.tojson(encoding='unicode'))
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return out if encoding == 'unicode' else out.encode(encoding)
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else:
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raise MorssException('Invalid callback var name')
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elif options.json:
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if options.indent:
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return rss.tojson(encoding=encoding, indent=4)
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else:
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return rss.tojson(encoding=encoding)
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elif options.csv:
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return rss.tocsv(encoding=encoding)
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elif options.reader:
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if options.indent:
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return rss.tohtml(encoding=encoding, pretty_print=True)
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else:
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return rss.tohtml(encoding=encoding)
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else:
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if options.indent:
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return rss.torss(xml_declaration=True, encoding=encoding, pretty_print=True)
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else:
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return rss.torss(xml_declaration=True, encoding=encoding)
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def process(url, cache=None, options=None):
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if not options:
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options = []
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options = Options(options)
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if cache:
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crawler.default_cache = crawler.SQLiteCache(cache)
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url = UrlFix(url)
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rss = FeedFetch(url, options)
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rss = FeedGather(rss, url, options)
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return FeedFormat(rss, options)
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def cgi_parse_environ(environ):
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# get options
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if 'REQUEST_URI' in environ:
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url = environ['REQUEST_URI'][1:]
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else:
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url = environ['PATH_INFO'][1:]
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if environ['QUERY_STRING']:
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url += '?' + environ['QUERY_STRING']
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url = re.sub(r'^/?(cgi/)?(morss.py|main.py)/', '', url)
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if url.startswith(':'):
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split = url.split('/', 1)
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raw_options = unquote(split[0]).replace('|', '/').replace('\\\'', '\'').split(':')[1:]
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if len(split) > 1:
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url = split[1]
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else:
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url = ''
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else:
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raw_options = []
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|
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# init
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options = Options(filterOptions(parseOptions(raw_options)))
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global DEBUG
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DEBUG = options.debug
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return (url, options)
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def cgi_app(environ, start_response):
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url, options = cgi_parse_environ(environ)
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headers = {}
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# headers
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headers['status'] = '200 OK'
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headers['cache-control'] = 'max-age=%s' % DELAY
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|
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if options.cors:
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headers['access-control-allow-origin'] = '*'
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if options.html or options.reader:
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headers['content-type'] = 'text/html'
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elif options.txt or options.silent:
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headers['content-type'] = 'text/plain'
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elif options.json:
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headers['content-type'] = 'application/json'
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elif options.callback:
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headers['content-type'] = 'application/javascript'
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elif options.csv:
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headers['content-type'] = 'text/csv'
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headers['content-disposition'] = 'attachment; filename="feed.csv"'
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else:
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headers['content-type'] = 'text/xml'
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crawler.default_cache = crawler.SQLiteCache(os.path.join(os.getcwd(), 'morss-cache.db'))
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# get the work done
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url = UrlFix(url)
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rss = FeedFetch(url, options)
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if headers['content-type'] == 'text/xml':
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headers['content-type'] = rss.mimetype[0]
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start_response(headers['status'], list(headers.items()))
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rss = FeedGather(rss, url, options)
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out = FeedFormat(rss, options)
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|
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if options.silent:
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return ['']
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else:
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return [out]
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|
|
def middleware(func):
|
|
" Decorator to turn a function into a wsgi middleware "
|
|
# This is called when parsing the code
|
|
|
|
def app_builder(app):
|
|
# This is called when doing app = cgi_wrapper(app)
|
|
|
|
def app_wrap(environ, start_response):
|
|
# This is called when a http request is being processed
|
|
|
|
return func(environ, start_response, app)
|
|
|
|
return app_wrap
|
|
|
|
return app_builder
|
|
|
|
|
|
@middleware
|
|
def cgi_file_handler(environ, start_response, app):
|
|
" Simple HTTP server to serve static files (.html, .css, etc.) "
|
|
|
|
files = {
|
|
'': 'text/html',
|
|
'index.html': 'text/html',
|
|
'sheet.xsl': 'text/xsl'}
|
|
|
|
if 'REQUEST_URI' in environ:
|
|
url = environ['REQUEST_URI'][1:]
|
|
|
|
else:
|
|
url = environ['PATH_INFO'][1:]
|
|
|
|
if url in files:
|
|
headers = {}
|
|
|
|
if url == '':
|
|
url = 'index.html'
|
|
|
|
if '--root' in sys.argv[1:]:
|
|
path = os.path.join(sys.argv[-1], url)
|
|
|
|
else:
|
|
path = url
|
|
|
|
try:
|
|
body = open(path, 'rb').read()
|
|
|
|
headers['status'] = '200 OK'
|
|
headers['content-type'] = files[url]
|
|
start_response(headers['status'], list(headers.items()))
|
|
return [body]
|
|
|
|
except IOError:
|
|
headers['status'] = '404 Not found'
|
|
start_response(headers['status'], list(headers.items()))
|
|
return ['Error %s' % headers['status']]
|
|
|
|
else:
|
|
return app(environ, start_response)
|
|
|
|
|
|
def cgi_page(environ, start_response):
|
|
url, options = cgi_parse_environ(environ)
|
|
|
|
# get page
|
|
PROTOCOL = ['http', 'https']
|
|
|
|
if urlparse(url).scheme not in ['http', 'https']:
|
|
url = 'http://' + url
|
|
|
|
con = crawler.custom_handler().open(url)
|
|
data = con.read()
|
|
|
|
contenttype = con.info().get('Content-Type', '').split(';')[0]
|
|
|
|
if contenttype in ['text/html', 'application/xhtml+xml', 'application/xml']:
|
|
html = lxml.html.fromstring(BeautifulSoup(data, 'lxml').prettify())
|
|
html.make_links_absolute(con.geturl())
|
|
|
|
kill_tags = ['script', 'iframe', 'noscript']
|
|
|
|
for tag in kill_tags:
|
|
for elem in html.xpath('//'+tag):
|
|
elem.getparent().remove(elem)
|
|
|
|
output = lxml.etree.tostring(html.getroottree(), encoding='utf-8')
|
|
|
|
else:
|
|
output = None
|
|
|
|
# return html page
|
|
headers = {'status': '200 OK', 'content-type': 'text/html'}
|
|
start_response(headers['status'], list(headers.items()))
|
|
return [output]
|
|
|
|
|
|
dispatch_table = {
|
|
'getpage': cgi_page
|
|
}
|
|
|
|
|
|
@middleware
|
|
def cgi_dispatcher(environ, start_response, app):
|
|
url, options = cgi_parse_environ(environ)
|
|
|
|
for key in dispatch_table.keys():
|
|
if key in options:
|
|
return dispatch_table[key](environ, start_response)
|
|
|
|
return app(environ, start_response)
|
|
|
|
|
|
@middleware
|
|
def cgi_error_handler(environ, start_response, app):
|
|
try:
|
|
return app(environ, start_response)
|
|
|
|
except (KeyboardInterrupt, SystemExit):
|
|
raise
|
|
|
|
except Exception as e:
|
|
headers = {'status': '500 Oops', 'content-type': 'text/html'}
|
|
start_response(headers['status'], list(headers.items()), sys.exc_info())
|
|
log('ERROR: %s' % repr(e), force=True)
|
|
return [cgitb.html(sys.exc_info())]
|
|
|
|
|
|
@middleware
|
|
def cgi_encode(environ, start_response, app):
|
|
out = app(environ, start_response)
|
|
return [x if isinstance(x, bytes) else str(x).encode('utf-8') for x in out]
|
|
|
|
|
|
def cli_app():
|
|
options = Options(filterOptions(parseOptions(sys.argv[1:-1])))
|
|
url = sys.argv[-1]
|
|
|
|
global DEBUG
|
|
DEBUG = options.debug
|
|
|
|
crawler.default_cache = crawler.SQLiteCache(os.path.expanduser('~/.cache/morss-cache.db'))
|
|
|
|
url = UrlFix(url)
|
|
rss = FeedFetch(url, options)
|
|
rss = FeedGather(rss, url, options)
|
|
out = FeedFormat(rss, options)
|
|
|
|
if not options.silent:
|
|
print(out.decode('utf-8', 'replace') if isinstance(out, bytes) else out)
|
|
|
|
log('done')
|
|
|
|
|
|
def isInt(string):
|
|
try:
|
|
int(string)
|
|
return True
|
|
|
|
except ValueError:
|
|
return False
|
|
|
|
|
|
def main():
|
|
if 'REQUEST_URI' in os.environ:
|
|
# mod_cgi
|
|
|
|
app = cgi_app
|
|
app = cgi_dispatcher(app)
|
|
app = cgi_error_handler(app)
|
|
app = cgi_encode(app)
|
|
|
|
wsgiref.handlers.CGIHandler().run(app)
|
|
|
|
elif len(sys.argv) <= 1 or isInt(sys.argv[1]) or '--root' in sys.argv[1:]:
|
|
# start internal (basic) http server
|
|
|
|
if len(sys.argv) > 1 and isInt(sys.argv[1]):
|
|
argPort = int(sys.argv[1])
|
|
if argPort > 0:
|
|
port = argPort
|
|
|
|
else:
|
|
raise MorssException('Port must be positive integer')
|
|
|
|
else:
|
|
port = PORT
|
|
|
|
app = cgi_app
|
|
app = cgi_file_handler(app)
|
|
app = cgi_dispatcher(app)
|
|
app = cgi_error_handler(app)
|
|
app = cgi_encode(app)
|
|
|
|
print('Serving http://localhost:%s/' % port)
|
|
httpd = wsgiref.simple_server.make_server('', port, app)
|
|
httpd.serve_forever()
|
|
|
|
else:
|
|
# as a CLI app
|
|
try:
|
|
cli_app()
|
|
|
|
except (KeyboardInterrupt, SystemExit):
|
|
raise
|
|
|
|
except Exception as e:
|
|
print('ERROR: %s' % e.message)
|
|
|
|
if __name__ == '__main__':
|
|
main()
|