1985 lines
68 KiB
Python
Executable File
1985 lines
68 KiB
Python
Executable File
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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#
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# =============================================================================
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# Version: 2.22 (Apr 19, 2015)
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# Author: Giuseppe Attardi (attardi@di.unipi.it), University of Pisa
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# Antonio Fuschetto (fuschett@di.unipi.it), University of Pisa
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#
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# Contributors:
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# Leonardo Souza (lsouza@amtera.com.br)
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# Juan Manuel Caicedo (juan@cavorite.com)
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# Humberto Pereira (begini@gmail.com)
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# Siegfried-A. Gevatter (siegfried@gevatter.com)
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# Pedro Assis (pedroh2306@gmail.com)
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# Wim Muskee (wimmuskee@gmail.com)
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# Radics Geza (radicsge@gmail.com)
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#
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# =============================================================================
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# Copyright (c) 2009. Giuseppe Attardi (attardi@di.unipi.it).
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# =============================================================================
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# This file is part of Tanl.
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#
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# Tanl is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License, version 3,
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# as published by the Free Software Foundation.
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#
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# Tanl is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# =============================================================================
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"""Wikipedia Extractor:
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Extracts and cleans text from a Wikipedia database dump and stores output in a
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number of files of similar size in a given directory.
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Each file will contain several documents in the format:
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<doc id="" url="" title="">
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...
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</doc>
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This version performs template expansion by preprocesssng the whole dump and
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collecting template definitions.
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"""
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import sys, os.path
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import re, random
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import argparse
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from itertools import izip
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import logging, traceback
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import urllib
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import bz2
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import codecs
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from htmlentitydefs import name2codepoint
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import urllib
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import Queue, threading, multiprocessing
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#===========================================================================
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# Program version
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version = '2.22'
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### PARAMS ####################################################################
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##
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# Defined in <siteinfo>
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# We include as default Template, when loading external template file.
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knownNamespaces = set(['Template'])
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##
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# Whether to preserve links in output
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#
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keepLinks = False
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##
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# Whether to transform sections into HTML
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#
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keepSections = False
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##
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# The namespace used for template definitions
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templateNamespace = 'Template'
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##
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# Recognize only these namespaces
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# w: Internal links to the Wikipedia
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# wiktionary: Wiki dictionary
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# wikt: shortcut for Wiktionary
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#
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acceptedNamespaces = ['w', 'wiktionary', 'wikt']
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##
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# Drop these elements from article text
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#
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discardElements = [
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'gallery', 'timeline', 'noinclude', 'pre',
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'table', 'tr', 'td', 'th', 'caption', 'div',
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'form', 'input', 'select', 'option', 'textarea',
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'ul', 'li', 'ol', 'dl', 'dt', 'dd', 'menu', 'dir',
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'ref', 'references', 'img', 'imagemap', 'source', 'small'
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]
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# This is obtained from <siteinfo>
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urlbase = None
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def get_url(id):
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global urlbase
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return "%s?curid=%s" % (urlbase, id)
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#=========================================================================
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#
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# MediaWiki Markup Grammar
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# https://www.mediawiki.org/wiki/Preprocessor_ABNF
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# xml-char = %x9 / %xA / %xD / %x20-D7FF / %xE000-FFFD / %x10000-10FFFF
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# sptab = SP / HTAB
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# ; everything except ">" (%x3E)
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# attr-char = %x9 / %xA / %xD / %x20-3D / %x3F-D7FF / %xE000-FFFD / %x10000-10FFFF
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# literal = *xml-char
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# title = wikitext-L3
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# part-name = wikitext-L3
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# part-value = wikitext-L3
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# part = ( part-name "=" part-value ) / ( part-value )
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# parts = [ title *( "|" part ) ]
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# tplarg = "{{{" parts "}}}"
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# template = "{{" parts "}}"
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# link = "[[" wikitext-L3 "]]"
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# comment = "<!--" literal "-->"
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# unclosed-comment = "<!--" literal END
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# ; the + in the line-eating-comment rule was absent between MW 1.12 and MW 1.22
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# line-eating-comment = LF LINE-START *SP +( comment *SP ) LINE-END
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# attr = *attr-char
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# nowiki-element = "<nowiki" attr ( "/>" / ( ">" literal ( "</nowiki>" / END ) ) )
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# wikitext-L2 = heading / wikitext-L3 / *wikitext-L2
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# wikitext-L3 = literal / template / tplarg / link / comment /
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# line-eating-comment / unclosed-comment / xmlish-element /
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# *wikitext-L3
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#------------------------------------------------------------------------------
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selfClosingTags = [ 'br', 'hr', 'nobr', 'ref', 'references', 'nowiki' ]
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# These tags are dropped, keeping their content.
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# handle 'a' separately, depending on keepLinks
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ignoredTags = [
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'b', 'big', 'blockquote', 'center', 'cite', 'div', 'em',
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'font', 'h1', 'h2', 'h3', 'h4', 'hiero', 'i', 'kbd', 'nowiki',
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'p', 'plaintext', 's', 'span', 'strike', 'strong',
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'sub', 'sup', 'tt', 'u', 'var'
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]
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placeholder_tags = {'math':'formula', 'code':'codice'}
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def normalizeTitle(title):
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"""Normalize title"""
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# remove leading/trailing whitespace and underscores
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title = title.strip(' _')
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# replace sequences of whitespace and underscore chars with a single space
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title = re.sub(r'[\s_]+', ' ', title)
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m = re.match(r'([^:]*):(\s*)(\S(?:.*))', title)
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if m:
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prefix = m.group(1)
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if m.group(2):
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optionalWhitespace = ' '
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else:
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optionalWhitespace = ''
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rest = m.group(3)
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ns = normalizeNamespace(prefix)
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if ns in knownNamespaces:
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# If the prefix designates a known namespace, then it might be
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# followed by optional whitespace that should be removed to get
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# the canonical page name
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# (e.g., "Category: Births" should become "Category:Births").
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title = ns + ":" + ucfirst(rest)
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else:
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# No namespace, just capitalize first letter.
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# If the part before the colon is not a known namespace, then we
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# must not remove the space after the colon (if any), e.g.,
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# "3001: The_Final_Odyssey" != "3001:The_Final_Odyssey".
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# However, to get the canonical page name we must contract multiple
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# spaces into one, because
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# "3001: The_Final_Odyssey" != "3001: The_Final_Odyssey".
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title = ucfirst(prefix) + ":" + optionalWhitespace + ucfirst(rest)
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else:
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# no namespace, just capitalize first letter
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title = ucfirst(title)
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return title
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##
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# Removes HTML or XML character references and entities from a text string.
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#
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# @param text The HTML (or XML) source text.
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# @return The plain text, as a Unicode string, if necessary.
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def unescape(text):
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def fixup(m):
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text = m.group(0)
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code = m.group(1)
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try:
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if text[1] == "#": # character reference
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if text[2] == "x":
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return unichr(int(code[1:], 16))
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else:
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return unichr(int(code))
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else: # named entity
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return unichr(name2codepoint[code])
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except:
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return text # leave as is
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return re.sub("&#?(\w+);", fixup, text)
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# Match HTML comments
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# The buggy template {{Template:T}} has a comment terminating with just "->"
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comment = re.compile(r'<!--.*?-->', re.DOTALL)
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# Match ignored tags
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ignored_tag_patterns = []
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def ignoreTag(tag):
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left = re.compile(r'<%s\b[^>/]*>' % tag, re.IGNORECASE) # both <ref> and <reference>
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right = re.compile(r'</\s*%s>' % tag, re.IGNORECASE)
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ignored_tag_patterns.append((left, right))
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for tag in ignoredTags:
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ignoreTag(tag)
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# Match selfClosing HTML tags
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selfClosing_tag_patterns = [
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re.compile(r'<\s*%s\b[^>]*/\s*>' % tag, re.DOTALL | re.IGNORECASE) for tag in selfClosingTags
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]
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# Match HTML placeholder tags
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placeholder_tag_patterns = [
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(re.compile(r'<\s*%s(\s*| [^>]+?)>.*?<\s*/\s*%s\s*>' % (tag, tag), re.DOTALL | re.IGNORECASE),
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repl) for tag, repl in placeholder_tags.items()
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]
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# Match preformatted lines
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preformatted = re.compile(r'^ .*?$')
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# Match external links (space separates second optional parameter)
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externalLink = re.compile(r'\[\w+[^ ]*? (.*?)]')
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externalLinkNoAnchor = re.compile(r'\[\w+[&\]]*\]')
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# Matches bold/italic
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bold_italic = re.compile(r"'''''(.*?)'''''")
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bold = re.compile(r"'''(.*?)'''")
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italic_quote = re.compile(r"''\"([^\"]*?)\"''")
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italic = re.compile(r"''(.*?)''")
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quote_quote = re.compile(r'""([^"]*?)""')
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# Matches space
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spaces = re.compile(r' {2,}')
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# Matches dots
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dots = re.compile(r'\.{4,}')
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#======================================================================
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substWords = 'subst:|safesubst:'
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class Extractor(object):
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"""
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An extraction task on a article.
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"""
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def __init__(self, id, title, page):
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"""
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:param page: a list of lines.
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"""
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self.id = id
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self.title = title
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self.page = page
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self.magicWords = MagicWords()
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self.frame = []
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def extract(self, out=sys.stdout):
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logging.info("%s\t%s" % (self.id, self.title))
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text = ''.join(self.page)
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url = get_url(self.id)
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header = '<doc id="%s" url="%s" title="%s">\n' % (self.id, url, self.title)
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# Separate header from text with a newline.
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header += self.title + '\n\n'
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header = header.encode('utf-8')
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self.magicWords['pagename'] = self.title
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self.magicWords['fullpagename'] = self.title
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text = clean(self, text)
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footer = "\n</doc>\n"
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if out != sys.stdout:
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out.reserve(len(header) + len(text) + len(footer))
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out.write(header)
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for line in compact(text):
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out.write(line.encode('utf-8'))
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out.write('\n')
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out.write(footer)
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#----------------------------------------------------------------------
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# Expand templates
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maxTemplateRecursionLevels = 30
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maxParameterRecursionLevels = 10
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# check for template beginning
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reOpen = re.compile('(?<!{){{(?!{)', re.DOTALL)
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def expandTemplates(self, wikitext):
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"""
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:param wikitext: the text to be expanded.
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Templates are frequently nested. Occasionally, parsing mistakes may
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cause template insertion to enter an infinite loop, for instance when
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trying to instantiate Template:Country
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{{country_{{{1}}}|{{{2}}}|{{{2}}}|size={{{size|}}}|name={{{name|}}}}}
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which is repeatedly trying to insert template 'country_', which is
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again resolved to Template:Country. The straightforward solution of
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keeping track of templates that were already inserted for the current
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article would not work, because the same template may legally be used
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more than once, with different parameters in different parts of the
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article. Therefore, we limit the number of iterations of nested
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template inclusion.
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"""
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# Test template expansion at:
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# https://en.wikipedia.org/wiki/Special:ExpandTemplates
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res = ''
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if len(self.frame) >= self.maxTemplateRecursionLevels:
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logging.warn('Max template recursion exceeded!')
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return res
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#logging.debug('<expandTemplates ' + str(len(self.frame)))
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cur = 0
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# look for matching {{...}}
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for s,e in findMatchingBraces(wikitext, 2):
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res += wikitext[cur:s] + self.expandTemplate(wikitext[s+2:e-2])
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cur = e
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# leftover
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res += wikitext[cur:]
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logging.debug(' expandTemplates> %d %s' % (len(self.frame), res))
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return res
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def templateParams(self, parameters):
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"""
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Build a dictionary with positional or name key to expanded parameters.
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:param parameters: the parts[1:] of a template, i.e. all except the title.
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:param depth: recusion depth.
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"""
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templateParams = {}
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if not parameters:
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return templateParams
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logging.debug('<templateParams: ' + str(len(self.frame)) + ' ' + '|'.join(parameters))
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# Parameters can be either named or unnamed. In the latter case, their
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# name is defined by their ordinal position (1, 2, 3, ...).
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unnamedParameterCounter = 0
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# It's legal for unnamed parameters to be skipped, in which case they
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# will get default values (if available) during actual instantiation.
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# That is {{template_name|a||c}} means parameter 1 gets
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# the value 'a', parameter 2 value is not defined, and parameter 3 gets
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# the value 'c'. This case is correctly handled by function 'split',
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# and does not require any special handling.
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for param in parameters:
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# Spaces before or after a parameter value are normally ignored,
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# UNLESS the parameter contains a link (to prevent possible gluing
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# the link to the following text after template substitution)
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# Parameter values may contain "=" symbols, hence the parameter
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# name extends up to the first such symbol.
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# It is legal for a parameter to be specified several times, in
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# which case the last assignment takes precedence. Example:
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# "{{t|a|b|c|2=B}}" is equivalent to "{{t|a|B|c}}".
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# Therefore, we don't check if the parameter has been assigned a
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# value before, because anyway the last assignment should override
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# any previous ones.
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# FIXME: Don't use DOTALL here since parameters may be tags with
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# attributes, e.g. <div class="templatequotecite">
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# Parameters may span several lines, like:
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# {{Reflist|colwidth=30em|refs=
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# <ref name="Goode">Title</ref>
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# The '=' might occurr within an HTML attribute: "<ref name=value".
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m = re.match(' *([^= ]*?) *=(.*)', param, re.DOTALL)
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if m:
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# This is a named parameter. This case also handles parameter
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# assignments like "2=xxx", where the number of an unnamed
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# parameter ("2") is specified explicitly - this is handled
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# transparently.
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parameterName = m.group(1).strip()
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parameterValue = m.group(2)
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if ']]' not in parameterValue: # if the value does not contain a link, trim whitespace
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parameterValue = parameterValue.strip()
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templateParams[parameterName] = parameterValue
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else:
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# this is an unnamed parameter
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unnamedParameterCounter += 1
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if ']]' not in param: # if the value does not contain a link, trim whitespace
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param = param.strip()
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templateParams[str(unnamedParameterCounter)] = param
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logging.debug(' templateParams> ' + str(len(self.frame)) + ' ' + '|'.join(templateParams.values()))
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return templateParams
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def expandTemplate(self, body):
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"""Expands template invocation.
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:param body: the parts of a template.
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:see http://meta.wikimedia.org/wiki/Help:Expansion for an explanation
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of the process.
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See in particular: Expansion of names and values
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http://meta.wikimedia.org/wiki/Help:Expansion#Expansion_of_names_and_values
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For most parser functions all names and values are expanded,
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regardless of what is relevant for the result. The branching functions
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(#if, #ifeq, #iferror, #ifexist, #ifexpr, #switch) are exceptions.
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All names in a template call are expanded, and the titles of the
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tplargs in the template body, after which it is determined which
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values must be expanded, and for which tplargs in the template body
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the first part (default).
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In the case of a tplarg, any parts beyond the first are never
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expanded. The possible name and the value of the first part is
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expanded if the title does not match a name in the template call.
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:see code for braceSubstitution at
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https://doc.wikimedia.org/mediawiki-core/master/php/html/Parser_8php_source.html#3397:
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"""
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# template = "{{" parts "}}"
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# Templates and tplargs are decomposed in the same way, with pipes as
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# separator, even though eventually any parts in a tplarg after the first
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# (the parameter default) are ignored, and an equals sign in the first
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# part is treated as plain text.
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# Pipes inside inner templates and tplargs, or inside double rectangular
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# brackets within the template or tplargs are not taken into account in
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# this decomposition.
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# The first part is called title, the other parts are simply called parts.
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# If a part has one or more equals signs in it, the first equals sign
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# determines the division into name = value. Equals signs inside inner
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# templates and tplargs, or inside double rectangular brackets within the
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# part are not taken into account in this decomposition. Parts without
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# equals sign are indexed 1, 2, .., given as attribute in the <name> tag.
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if len(self.frame) >= self.maxTemplateRecursionLevels:
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logging.warn('Reached max template recursion: %d' %
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self.maxTemplateRecursionLevels)
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logging.debug(' INVOCATION> %d %s' % (len(self.frame), body))
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return ''
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logging.debug('INVOCATION %d %s' % (len(self.frame), body))
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parts = splitParameters(body)
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# title is the portion before the first |
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logging.debug('TITLE ' + parts[0].strip())
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title = self.expandTemplates(parts[0].strip())
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# SUBST
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# Apply the template tag to parameters without
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# substituting into them, e.g.
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# {{subst:t|a{{{p|q}}}b}} gives the wikitext start-a{{{p|q}}}b-end
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# @see https://www.mediawiki.org/wiki/Manual:Substitution#Partial_substitution
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subst = False
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if re.match(substWords, title, re.IGNORECASE):
|
||
title = re.sub(substWords, '', title, 1, re.IGNORECASE)
|
||
subst = True
|
||
|
||
if title.lower() in self.magicWords.values:
|
||
return self.magicWords[title.lower()]
|
||
|
||
# Parser functions
|
||
# The first argument is everything after the first colon.
|
||
# It has been evaluated above.
|
||
colon = title.find(':')
|
||
if colon > 1:
|
||
funct = title[:colon]
|
||
parts[0] = title[colon+1:].strip() # side-effect (parts[0] not used later)
|
||
# arguments after first are not evaluated
|
||
ret = callParserFunction(funct, parts, self.frame)
|
||
return self.expandTemplates(ret)
|
||
|
||
title = fullyQualifiedTemplateTitle(title)
|
||
|
||
redirected = redirects.get(title)
|
||
if redirected:
|
||
title = redirected
|
||
|
||
if title not in templates:
|
||
# The page being included could not be identified
|
||
return ''
|
||
|
||
# get the template
|
||
template = templates[title]
|
||
logging.debug('TEMPLATE %s: %s' % (title, template))
|
||
|
||
# tplarg = "{{{" parts "}}}"
|
||
# parts = [ title *( "|" part ) ]
|
||
# part = ( part-name "=" part-value ) / ( part-value )
|
||
# part-name = wikitext-L3
|
||
# part-value = wikitext-L3
|
||
# wikitext-L3 = literal / template / tplarg / link / comment /
|
||
# line-eating-comment / unclosed-comment /
|
||
# xmlish-element / *wikitext-L3
|
||
|
||
# A tplarg may contain other parameters as well as templates, e.g.:
|
||
# {{{text|{{{quote|{{{1|{{error|Error: No text given}}}}}}}}}}}
|
||
# hence no simple RE like this would work:
|
||
# '{{{((?:(?!{{{).)*?)}}}'
|
||
# We must use full CF parsing.
|
||
|
||
# the parameter name itself might be computed, e.g.:
|
||
# {{{appointe{{#if:{{{appointer14|}}}|r|d}}14|}}}
|
||
|
||
# Because of the multiple uses of double-brace and triple-brace
|
||
# syntax, expressions can sometimes be ambiguous.
|
||
# Precedence rules specifed here:
|
||
# http://www.mediawiki.org/wiki/Preprocessor_ABNF#Ideal_precedence
|
||
# resolve ambiguities like this:
|
||
# {{{{ }}}} -> { {{{ }}} }
|
||
# {{{{{ }}}}} -> {{ {{{ }}} }}
|
||
#
|
||
# :see: https://en.wikipedia.org/wiki/Help:Template#Handling_parameters
|
||
|
||
params = parts[1:]
|
||
|
||
if not subst:
|
||
# Evaluate parameters, since they may contain templates, including
|
||
# the symbol "=".
|
||
# {{#ifexpr: {{{1}}} = 1 }}
|
||
params = [self.expandTemplates(p) for p in params]
|
||
|
||
# build a dict of name-values for the parameter values
|
||
params = self.templateParams(params)
|
||
|
||
# Perform parameter substitution
|
||
instantiated = self.substParameters(template, params)
|
||
logging.debug('instantiated %d %s' % (len(self.frame), instantiated))
|
||
self.frame.append((title, params))
|
||
value = self.expandTemplates(instantiated)
|
||
self.frame.pop()
|
||
logging.debug(' INVOCATION> %s %d %s' % (title, len(self.frame), value))
|
||
return value
|
||
|
||
def substParameters(self, body, params, subst_depth=0):
|
||
"""
|
||
:param body: the body of a template.
|
||
:param params: dict of name-values template parameters.
|
||
:param subst_depth: depth of recursive parameter substitutions.
|
||
"""
|
||
# We perform parameter substitutions recursively.
|
||
# We also limit the maximum number of iterations to avoid too long or
|
||
# even endless loops (in case of malformed input).
|
||
|
||
# :see: http://meta.wikimedia.org/wiki/Help:Expansion#Distinction_between_variables.2C_parser_functions.2C_and_templates
|
||
#
|
||
# Parameter values are assigned to parameters in two (?) passes.
|
||
# Therefore a parameter name in a template can depend on the value of
|
||
# another parameter of the same template, regardless of the order in
|
||
# which they are specified in the template call, for example, using
|
||
# Template:ppp containing "{{{{{{p}}}}}}", {{ppp|p=q|q=r}} and even
|
||
# {{ppp|q=r|p=q}} gives r, but using Template:tvvv containing
|
||
# "{{{{{{{{{p}}}}}}}}}", {{tvvv|p=q|q=r|r=s}} gives s.
|
||
|
||
logging.debug('substParameters (%d, %d) %s' % (len(self.frame), subst_depth, body))
|
||
|
||
result = ''
|
||
if subst_depth > self.maxParameterRecursionLevels:
|
||
logging.warn('Reachead maximum parameter recursions: %d' %
|
||
self.maxParameterRecursionLevels)
|
||
return result
|
||
|
||
start = 0
|
||
# we must handle nesting, s.a.
|
||
# {{{1|{{PAGENAME}}}
|
||
# {{{italics|{{{italic|}}}
|
||
# {{#if:{{{{{#if:{{{nominee|}}}|nominee|candidate}}|}}}|
|
||
#
|
||
|
||
for s,e in findMatchingBraces(body, 3):
|
||
# invoke substParameter on outer {{{}}}
|
||
result += body[start:s] + self.substParameter(body[s+3:e-3],
|
||
params, subst_depth+1)
|
||
start = e
|
||
result += body[start:] # leftover
|
||
return result
|
||
|
||
def substParameter(self, parameter, params, subst_depth):
|
||
"""
|
||
:param parameter: the parts of a tplarg.
|
||
:param params: dict of name-values of template parameters.
|
||
"""
|
||
# the parameter name itself might contain templates, e.g.:
|
||
# appointe{{#if:{{{appointer14|}}}|r|d}}14|
|
||
|
||
# any parts in a tplarg after the first (the parameter default) are
|
||
# ignored, and an equals sign in the first part is treated as plain text.
|
||
#logging.debug(' subst %s' % parameter)
|
||
|
||
parts = splitParameters(parameter)
|
||
if len(parts) > 1:
|
||
# This parameter has a default value
|
||
paramName = self.expandTemplates(self.substParameters(parts[0], params, subst_depth))
|
||
defaultValue = parts[1]
|
||
|
||
if paramName in params:
|
||
return params[paramName] # use parameter value specified in template invocation
|
||
else: # use the default value
|
||
defaultValue = self.substParameters(defaultValue, params, subst_depth)
|
||
return self.expandTemplates(defaultValue)
|
||
# parameter without a default value
|
||
parameter = self.substParameters(parameter, params, subst_depth)
|
||
parameter = self.expandTemplates(parameter)
|
||
if parameter in params:
|
||
return params[parameter] # use parameter value specified in template invocation
|
||
# Parameter not specified in template invocation and without
|
||
# a default value.
|
||
# The Wiki rules for templates
|
||
# (see http://meta.wikimedia.org/wiki/Help:Template)
|
||
# would require to keep the parameter in 3 braces, but we just drop them.
|
||
return ''
|
||
# Surplus parameters - i.e., those assigned values in template
|
||
# invocation but not used in the template body - are simply ignored.
|
||
|
||
# ----------------------------------------------------------------------
|
||
# parameter handling
|
||
|
||
def splitParameters(paramsList, sep='|'):
|
||
"""
|
||
:param paramList: the parts of a template or tplarg.
|
||
|
||
Split template parameters at the separator :param sep:, which defaults to
|
||
"|". The fuction can be used also to split also key-value pairs at the
|
||
separator "=".
|
||
|
||
Template parameters often contain URLs, internal links, text or even
|
||
template expressions, since we evaluate templates outside in.
|
||
This is required for cases like:
|
||
{{#if: {{{1}}} | {{lc:{{{1}}} | "parameter missing"}}
|
||
Parameters are separated by "|" symbols. However, we
|
||
cannot simply split the string on "|" symbols, since these
|
||
also appear inside templates and internal links, e.g.
|
||
|
||
{{if:|
|
||
|{{#if:the president|
|
||
|{{#if:|
|
||
[[Category:Hatnote templates|A{{PAGENAME}}]]
|
||
}}
|
||
}}
|
||
}}
|
||
|
||
We split parameters at the "|" symbols that are not inside any pair
|
||
{{{...}}}, {{...}}, [[...]], {|...|}.
|
||
"""
|
||
|
||
# Must handle:
|
||
# #ifeq: ped|article|[http://emedicine.medscape.com/article/180-overview|[http://www.emedicine.com/ped/topic180.htm#{{#if: |section~}}
|
||
|
||
parameters = []
|
||
cur = 0
|
||
for s,e in findBalanced(paramsList,
|
||
['{{{', '{{', '[[', '{|'],
|
||
['}}}', '}}', ']]', '|}']):
|
||
par = paramsList[cur:s].split(sep)
|
||
if par:
|
||
if parameters:
|
||
# portion before | belongs to previous parameter
|
||
parameters[-1] += par[0]
|
||
if len(par) > 1:
|
||
# rest are new parameters
|
||
parameters.extend(par[1:])
|
||
else:
|
||
parameters = par
|
||
elif not parameters:
|
||
parameters = [''] # create first param
|
||
# add span to last previous parameter
|
||
parameters[-1] += paramsList[s:e]
|
||
cur = e
|
||
# leftover
|
||
par = paramsList[cur:].split(sep)
|
||
if par:
|
||
if parameters:
|
||
# portion before | belongs to previous parameter
|
||
parameters[-1] += par[0]
|
||
if len(par) > 1:
|
||
# rest are new parameters
|
||
parameters.extend(par[1:])
|
||
else:
|
||
parameters = par
|
||
|
||
#logging.debug('splitParameters ' + sep + ' ' + paramsList + '\ndict: ' + str(parameters))
|
||
return parameters
|
||
|
||
def findMatchingBraces(text, ldelim):
|
||
"""
|
||
:param ldelim: number of braces to match.
|
||
"""
|
||
# Parsing is done with respect to pairs of double braces {{..}} delimiting
|
||
# a template, and pairs of triple braces {{{..}}} delimiting a tplarg.
|
||
# If double opening braces are followed by triple closing braces or
|
||
# conversely, this is taken as delimiting a template, with one left-over
|
||
# brace outside it, taken as plain text. For any pattern of braces this
|
||
# defines a set of templates and tplargs such that any two are either
|
||
# separate or nested (not overlapping).
|
||
|
||
# Unmatched double rectangular closing brackets can be in a template or
|
||
# tplarg, but unmatched double rectangular opening brackets
|
||
# cannot. Unmatched double or triple closing braces inside a pair of
|
||
# double rectangular brackets are treated as plain text.
|
||
# Other formulation: in ambiguity between template or tplarg on one hand,
|
||
# and a link on the other hand, the structure with the rightmost opening
|
||
# takes precedence, even if this is the opening of a link without any
|
||
# closing, so not producing an actual link.
|
||
|
||
# In the case of more than three opening braces the last three are assumed
|
||
# to belong to a tplarg, unless there is no matching triple of closing
|
||
# braces, in which case the last two opening braces are are assumed to
|
||
# belong to a template.
|
||
|
||
# We must skip individual { like in: {{#ifeq: {{padleft:|1|}} | { | | }}
|
||
# We must resolve ambiguities like this:
|
||
# {{{{ }}}} -> { {{{ }}} }
|
||
# {{{{{ }}}}} -> {{ {{{ }}} }}
|
||
# {{#if:{{{{{#if:{{{nominee|}}}|nominee|candidate}}|}}}|...}}
|
||
|
||
# Handle:
|
||
# {{{{{|safesubst:}}}#Invoke:String|replace|{{{1|{{{{{|safesubst:}}}PAGENAME}}}}}|%s+%([^%(]-%)$||plain=false}}
|
||
# as well as expressions with stray }:
|
||
# {{{link|{{ucfirst:{{{1}}}}}} interchange}}}""")
|
||
|
||
reOpen = re.compile('[{]{%d,}' % ldelim) # at least ldelim
|
||
reNext = re.compile('([{]{2,})|(}{2,})') # at least 2
|
||
|
||
cur = 0
|
||
while True:
|
||
m1 = reOpen.search(text, cur)
|
||
if not m1:
|
||
return
|
||
openCount = len(m1.group(0))
|
||
stack = [openCount] # stack of opening
|
||
end = m1.end()
|
||
while True:
|
||
m2 = reNext.search(text, end)
|
||
if not m2:
|
||
return # unbalanced
|
||
end = m2.end()
|
||
if m2.lastindex == 1:
|
||
stack.append(len(m2.group(1))) # span of {
|
||
else:
|
||
closeCount = len(m2.group(2))
|
||
while stack:
|
||
openCount = stack.pop() # opening span
|
||
if closeCount >= openCount:
|
||
closeCount -= openCount
|
||
else:
|
||
# put back unmatched
|
||
stack.append(openCount - closeCount)
|
||
break
|
||
if closeCount <= 1: # either close or stray }
|
||
break
|
||
if not stack:
|
||
yield m1.start(), end-closeCount
|
||
cur = end
|
||
break
|
||
elif len(stack) == 1 and stack[0] < ldelim:
|
||
# ambiguous {{{{{ }}} }}
|
||
yield m1.start() + stack[0], end
|
||
cur = end
|
||
break
|
||
|
||
def findBalanced(text, openDelim, closeDelim, openPatterns=None,
|
||
startDelim=None):
|
||
"""
|
||
Assuming that text contains a properly balanced expression using
|
||
:param openDelim: as opening delimiters and
|
||
:param closeDelim: as closing delimiters.
|
||
:param openPatterns: use these regex patterns for matching open delimiters.
|
||
Sometimes patterns are ambiguous, hence specifying '{{{(?!{)' avoids
|
||
matching '{{{{' for '{{{'.
|
||
:param startDelim: start searching for this delimiter.
|
||
:return: an iterator producing pairs (start, end) of start and end
|
||
positions in text containing a balanced expression.
|
||
"""
|
||
if openPatterns:
|
||
openPat = '|'.join(openPatterns)
|
||
else:
|
||
openPat = '|'.join([re.escape(x) for x in openDelim])
|
||
# patter for delimiters expected after each opening delimiter
|
||
afterPat = { o:re.compile(openPat+'|'+c, re.DOTALL) for o,c in izip(openDelim, closeDelim)}
|
||
stack = []
|
||
start = 0
|
||
cur = 0
|
||
end = len(text)
|
||
startSet = False
|
||
if startDelim is not None:
|
||
if openPatterns:
|
||
startPat = re.compile(openPatterns[startDelim])
|
||
else:
|
||
startPat = re.compile(openDelim[startDelim])
|
||
else:
|
||
startPat = re.compile(openPat)
|
||
nextPat = startPat
|
||
while True:
|
||
next = nextPat.search(text, cur)
|
||
if not next:
|
||
return
|
||
if not startSet:
|
||
start = next.start()
|
||
startSet = True
|
||
delim = next.group(0)
|
||
if delim in openDelim:
|
||
stack.append(delim)
|
||
nextPat = afterPat[delim]
|
||
else:
|
||
opening = stack.pop()
|
||
# assert opening == openDelim[closeDelim.index(next.group(0))]
|
||
if stack:
|
||
nextPat = afterPat[stack[-1]]
|
||
else:
|
||
yield start, next.end()
|
||
nextPat = startPat
|
||
start = next.end()
|
||
startSet = False
|
||
cur = next.end()
|
||
|
||
# ----------------------------------------------------------------------
|
||
# Modules
|
||
|
||
# Only minimal support
|
||
# FIXME: import Lua modules.
|
||
|
||
modules = {
|
||
'convert' : {
|
||
'convert': lambda x, u, *rest: x+' '+u, # no conversion
|
||
}
|
||
}
|
||
|
||
# ----------------------------------------------------------------------
|
||
# variables
|
||
|
||
class MagicWords(object):
|
||
"""
|
||
One copy in each Extractor.
|
||
|
||
@see https://doc.wikimedia.org/mediawiki-core/master/php/MagicWord_8php_source.html
|
||
"""
|
||
names = [
|
||
'!',
|
||
'currentmonth',
|
||
'currentmonth1',
|
||
'currentmonthname',
|
||
'currentmonthnamegen',
|
||
'currentmonthabbrev',
|
||
'currentday',
|
||
'currentday2',
|
||
'currentdayname',
|
||
'currentyear',
|
||
'currenttime',
|
||
'currenthour',
|
||
'localmonth',
|
||
'localmonth1',
|
||
'localmonthname',
|
||
'localmonthnamegen',
|
||
'localmonthabbrev',
|
||
'localday',
|
||
'localday2',
|
||
'localdayname',
|
||
'localyear',
|
||
'localtime',
|
||
'localhour',
|
||
'numberofarticles',
|
||
'numberoffiles',
|
||
'numberofedits',
|
||
'articlepath',
|
||
'pageid',
|
||
'sitename',
|
||
'server',
|
||
'servername',
|
||
'scriptpath',
|
||
'stylepath',
|
||
'pagename',
|
||
'pagenamee',
|
||
'fullpagename',
|
||
'fullpagenamee',
|
||
'namespace',
|
||
'namespacee',
|
||
'namespacenumber',
|
||
'currentweek',
|
||
'currentdow',
|
||
'localweek',
|
||
'localdow',
|
||
'revisionid',
|
||
'revisionday',
|
||
'revisionday2',
|
||
'revisionmonth',
|
||
'revisionmonth1',
|
||
'revisionyear',
|
||
'revisiontimestamp',
|
||
'revisionuser',
|
||
'revisionsize',
|
||
'subpagename',
|
||
'subpagenamee',
|
||
'talkspace',
|
||
'talkspacee',
|
||
'subjectspace',
|
||
'subjectspacee',
|
||
'talkpagename',
|
||
'talkpagenamee',
|
||
'subjectpagename',
|
||
'subjectpagenamee',
|
||
'numberofusers',
|
||
'numberofactiveusers',
|
||
'numberofpages',
|
||
'currentversion',
|
||
'rootpagename',
|
||
'rootpagenamee',
|
||
'basepagename',
|
||
'basepagenamee',
|
||
'currenttimestamp',
|
||
'localtimestamp',
|
||
'directionmark',
|
||
'contentlanguage',
|
||
'numberofadmins',
|
||
'cascadingsources',
|
||
]
|
||
|
||
def __init__(self):
|
||
self.values = {}
|
||
self.values['!'] = '|'
|
||
|
||
def __getitem__(self, name):
|
||
return self.values.get(name)
|
||
|
||
def __setitem__(self, name, value):
|
||
self.values[name] = value
|
||
|
||
switches = [
|
||
'__NOTOC__',
|
||
'__FORCETOC__',
|
||
'__TOC__',
|
||
'__TOC__',
|
||
'__NEWSECTIONLINK__',
|
||
'__NONEWSECTIONLINK__',
|
||
'__NOGALLERY__',
|
||
'__HIDDENCAT__',
|
||
'__NOCONTENTCONVERT__',
|
||
'__NOCC__',
|
||
'__NOTITLECONVERT__',
|
||
'__NOTC__',
|
||
'__START__',
|
||
'__END__',
|
||
'__INDEX__',
|
||
'__NOINDEX__',
|
||
'__STATICREDIRECT__',
|
||
'__DISAMBIG__'
|
||
]
|
||
|
||
magicWordsRE = re.compile('|'.join(MagicWords.switches))
|
||
|
||
# ----------------------------------------------------------------------
|
||
# parser functions utilities
|
||
|
||
def ucfirst(string):
|
||
""":return: a string with its first character uppercase"""
|
||
if string:
|
||
if len(string) > 1:
|
||
return string[0].upper() + string[1:]
|
||
else:
|
||
return string.upper()
|
||
else:
|
||
return ''
|
||
|
||
def lcfirst(string):
|
||
""":return: a string with its first character lowercase"""
|
||
if string:
|
||
if len(string) > 1:
|
||
return string[0].lower() + string[1:]
|
||
else:
|
||
return string.lower()
|
||
else:
|
||
return ''
|
||
|
||
def fullyQualifiedTemplateTitle(templateTitle):
|
||
"""
|
||
Determine the namespace of the page being included through the template
|
||
mechanism
|
||
"""
|
||
if templateTitle.startswith(':'):
|
||
# Leading colon by itself implies main namespace, so strip this colon
|
||
return ucfirst(templateTitle[1:])
|
||
else:
|
||
m = re.match('([^:]*)(:.*)', templateTitle)
|
||
if m:
|
||
# colon found but not in the first position - check if it
|
||
# designates a known namespace
|
||
prefix = normalizeNamespace(m.group(1))
|
||
if prefix in knownNamespaces:
|
||
return prefix + ucfirst(m.group(2))
|
||
# The title of the page being included is NOT in the main namespace and
|
||
# lacks any other explicit designation of the namespace - therefore, it
|
||
# is resolved to the Template namespace (that's the default for the
|
||
# template inclusion mechanism).
|
||
|
||
# This is a defense against pages whose title only contains UTF-8 chars
|
||
# that are reduced to an empty string. Right now I can think of one such
|
||
# case - <C2><A0> which represents the non-breaking space.
|
||
# In this particular case, this page is a redirect to [[Non-nreaking
|
||
# space]], but having in the system a redirect page with an empty title
|
||
# causes numerous problems, so we'll live happier without it.
|
||
if templateTitle:
|
||
return "Template:" + ucfirst(templateTitle)
|
||
else:
|
||
logging.warn("Skipping page with empty title")
|
||
return ''
|
||
|
||
def normalizeNamespace(ns):
|
||
return ucfirst(ns)
|
||
|
||
# ----------------------------------------------------------------------
|
||
# Parser functions
|
||
# see http://www.mediawiki.org/wiki/Help:Extension:ParserFunctions
|
||
# https://github.com/Wikia/app/blob/dev/extensions/ParserFunctions/ParserFunctions_body.php
|
||
|
||
class Infix:
|
||
"""Infix operators.
|
||
The calling sequence for the infix is:
|
||
x |op| y
|
||
"""
|
||
def __init__(self, function):
|
||
self.function = function
|
||
def __ror__(self, other):
|
||
return Infix(lambda x, self=self, other=other: self.function(other, x))
|
||
def __or__(self, other):
|
||
return self.function(other)
|
||
def __rlshift__(self, other):
|
||
return Infix(lambda x, self=self, other=other: self.function(other, x))
|
||
def __rshift__(self, other):
|
||
return self.function(other)
|
||
def __call__(self, value1, value2):
|
||
return self.function(value1, value2)
|
||
|
||
ROUND = Infix(lambda x,y: round(x, y))
|
||
|
||
def sharp_expr(expr):
|
||
try:
|
||
expr = re.sub('mod', '%', expr)
|
||
expr = re.sub('\bdiv\b', '/', expr)
|
||
expr = re.sub('\bround\b', '|ROUND|', expr)
|
||
return str(eval(expr))
|
||
except:
|
||
return ""
|
||
|
||
def sharp_if(testValue, valueIfTrue, valueIfFalse=None, *args):
|
||
# In theory, we should evaluate the first argument here,
|
||
# but it was evaluated while evaluating part[0] in expandTemplate().
|
||
if testValue.strip():
|
||
# The {{#if:}} function is an if-then-else construct.
|
||
# The applied condition is: "The condition string is non-empty".
|
||
valueIfTrue = valueIfTrue.strip()
|
||
if valueIfTrue:
|
||
return valueIfTrue
|
||
elif valueIfFalse:
|
||
return valueIfFalse.strip()
|
||
return ""
|
||
|
||
def sharp_ifeq(lvalue, rvalue, valueIfTrue, valueIfFalse=None, *args):
|
||
rvalue = rvalue.strip()
|
||
if rvalue:
|
||
# lvalue is always defined
|
||
if lvalue.strip() == rvalue:
|
||
# The {{#ifeq:}} function is an if-then-else construct. The
|
||
# applied condition is "is rvalue equal to lvalue". Note that this
|
||
# does only string comparison while MediaWiki implementation also
|
||
# supports numerical comparissons.
|
||
|
||
if valueIfTrue:
|
||
return valueIfTrue.strip()
|
||
else:
|
||
if valueIfFalse:
|
||
return valueIfFalse.strip()
|
||
return ""
|
||
|
||
def sharp_iferror(test, then='', Else=None, *args):
|
||
if re.match('<(?:strong|span|p|div)\s(?:[^\s>]*\s+)*?class="(?:[^"\s>]*\s+)*?error(?:\s[^">]*)?"', test):
|
||
return then
|
||
elif Else is None:
|
||
return test.strip()
|
||
else:
|
||
return Else.strip()
|
||
|
||
def sharp_switch(primary, *params):
|
||
# FIXME: we don't support numeric expressions in primary
|
||
|
||
# {{#switch: comparison string
|
||
# | case1 = result1
|
||
# | case2
|
||
# | case4 = result2
|
||
# | 1 | case5 = result3
|
||
# | #default = result4
|
||
# }}
|
||
|
||
primary = primary.strip()
|
||
found = False # for fall through cases
|
||
default = None
|
||
rvalue = None
|
||
lvalue = ''
|
||
for param in params:
|
||
# handle cases like:
|
||
# [http://www.perseus.tufts.edu/hopper/text?doc=Perseus...]
|
||
pair = splitParameters(param, '=')
|
||
lvalue = pair[0].strip()
|
||
rvalue = None
|
||
if len(pair) > 1:
|
||
# got "="
|
||
rvalue = pair[1].strip()
|
||
# check for any of multiple values pipe separated
|
||
if found or primary in [v.strip() for v in lvalue.split('|')]:
|
||
# Found a match, return now
|
||
return rvalue
|
||
elif lvalue == '#default':
|
||
default = rvalue
|
||
rvalue = None # avoid defaulting to last case
|
||
elif lvalue == primary:
|
||
# If the value matches, set a flag and continue
|
||
found = True
|
||
# Default case
|
||
# Check if the last item had no = sign, thus specifying the default case
|
||
if rvalue is not None:
|
||
return lvalue
|
||
elif default is not None:
|
||
return default
|
||
return ''
|
||
|
||
# Extension Scribuntu
|
||
def sharp_invoke(module, function, frame):
|
||
functions = modules.get(module)
|
||
if functions:
|
||
funct = functions.get(function)
|
||
if funct:
|
||
# find parameters in frame whose title is the one of the original
|
||
# template invocation
|
||
templateTitle = fullyQualifiedTemplateTitle(function)
|
||
pair = next((x for x in frame if x[0] == templateTitle), None)
|
||
if pair:
|
||
params = pair[1]
|
||
# extract positional args
|
||
params = [params.get(str(i+1)) for i in range(len(params))]
|
||
return funct(*params)
|
||
else:
|
||
return funct()
|
||
return ''
|
||
|
||
parserFunctions = {
|
||
|
||
'#expr': sharp_expr,
|
||
|
||
'#if': sharp_if,
|
||
|
||
'#ifeq': sharp_ifeq,
|
||
|
||
'#iferror': sharp_iferror,
|
||
|
||
'#ifexpr': lambda *args: '', # not supported
|
||
|
||
'#ifexist': lambda *args: '', # not supported
|
||
|
||
'#rel2abs': lambda *args: '', # not supported
|
||
|
||
'#switch': sharp_switch,
|
||
|
||
'#language': lambda *args: '', # not supported
|
||
|
||
'#time': lambda *args: '', # not supported
|
||
|
||
'#timel': lambda *args: '', # not supported
|
||
|
||
'#titleparts': lambda *args: '', # not supported
|
||
|
||
# This function is used in some pages to construct links
|
||
# http://meta.wikimedia.org/wiki/Help:URL
|
||
'urlencode': lambda string, *rest: urllib.quote(string.encode('utf-8')),
|
||
|
||
'lc': lambda string, *rest: string.lower() if string else '',
|
||
|
||
'lcfirst': lambda string, *rest: lcfirst(string),
|
||
|
||
'uc': lambda string, *rest: string.upper() if string else '',
|
||
|
||
'ucfirst': lambda string, *rest: ucfirst(string),
|
||
|
||
'int': lambda string, *rest: str(int(string)),
|
||
|
||
}
|
||
|
||
def callParserFunction(functionName, args, frame):
|
||
"""
|
||
Parser functions have similar syntax as templates, except that
|
||
the first argument is everything after the first colon.
|
||
:return: the result of the invocation, None in case of failure.
|
||
|
||
http://meta.wikimedia.org/wiki/Help:ParserFunctions
|
||
"""
|
||
|
||
try:
|
||
if functionName == '#invoke':
|
||
# special handling of frame
|
||
ret = sharp_invoke(args[0].strip(), args[1].strip(), frame)
|
||
logging.debug('parserFunction> ' + functionName + ' ' + ret)
|
||
return ret
|
||
if functionName in parserFunctions:
|
||
ret = parserFunctions[functionName](*args)
|
||
logging.debug('parserFunction> ' + functionName + ' ' + ret)
|
||
return ret
|
||
except:
|
||
return "" # FIXME: fix errors
|
||
|
||
return ""
|
||
|
||
# ----------------------------------------------------------------------
|
||
# Expand using WikiMedia API
|
||
# import json
|
||
|
||
# def expandTemplates(text):
|
||
# """Expand templates invoking MediaWiki API"""
|
||
# text = urlib.urlencodew(text.encode('utf-8'))
|
||
# base = urlbase[:urlbase.rfind('/')]
|
||
# url = base + "/w/api.php?action=expandtemplates&format=json&text=" + text
|
||
# exp = json.loads(urllib.urlopen(url))
|
||
# return exp['expandtemplates']['*']
|
||
|
||
# ----------------------------------------------------------------------
|
||
# Extract Template definition
|
||
|
||
reNoinclude = re.compile(r'<noinclude>(?:.*?)</noinclude>', re.DOTALL)
|
||
reIncludeonly = re.compile(r'<includeonly>|</includeonly>', re.DOTALL)
|
||
|
||
templates = {}
|
||
redirects = {}
|
||
|
||
def define_template(title, page):
|
||
"""
|
||
Adds a template defined in the :param page:.
|
||
@see https://en.wikipedia.org/wiki/Help:Template#Noinclude.2C_includeonly.2C_and_onlyinclude
|
||
"""
|
||
global templates
|
||
global redirects
|
||
|
||
#title = normalizeTitle(title)
|
||
|
||
# check for redirects
|
||
m = re.match('#REDIRECT.*?\[\[([^\]]*)]]', page[0])
|
||
if m:
|
||
redirects[title] = m.group(1) #normalizeTitle(m.group(1))
|
||
return
|
||
|
||
text = unescape(''.join(page))
|
||
|
||
# We're storing template text for future inclusion, therefore,
|
||
# remove all <noinclude> text and keep all <includeonly> text
|
||
# (but eliminate <includeonly> tags per se).
|
||
# However, if <onlyinclude> ... </onlyinclude> parts are present,
|
||
# then only keep them and discard the rest of the template body.
|
||
# This is because using <onlyinclude> on a text fragment is
|
||
# equivalent to enclosing it in <includeonly> tags **AND**
|
||
# enclosing all the rest of the template body in <noinclude> tags.
|
||
|
||
# remove comments
|
||
text = comment.sub('', text)
|
||
|
||
# eliminate <noinclude> fragments
|
||
text = reNoinclude.sub('', text)
|
||
# eliminate unterminated <noinclude> elements
|
||
text = re.sub(r'<noinclude\s*>.*$', '', text, flags=re.DOTALL)
|
||
text = re.sub(r'<noinclude/>', '', text)
|
||
|
||
onlyincludeAccumulator = ''
|
||
for m in re.finditer('<onlyinclude>(.*?)</onlyinclude>', text, re.DOTALL):
|
||
onlyincludeAccumulator += m.group(1)
|
||
if onlyincludeAccumulator:
|
||
text = onlyincludeAccumulator
|
||
else:
|
||
text = reIncludeonly.sub('', text)
|
||
|
||
if text:
|
||
if title in templates:
|
||
logging.warn('Redefining: ' + title)
|
||
templates[title] = text
|
||
|
||
# ----------------------------------------------------------------------
|
||
|
||
def dropNested(text, openDelim, closeDelim):
|
||
"""
|
||
A matching function for nested expressions, e.g. namespaces and tables.
|
||
"""
|
||
openRE = re.compile(openDelim)
|
||
closeRE = re.compile(closeDelim)
|
||
# partition text in separate blocks { } { }
|
||
spans = [] # pairs (s, e) for each partition
|
||
nest = 0 # nesting level
|
||
start = openRE.search(text, 0)
|
||
if not start:
|
||
return text
|
||
end = closeRE.search(text, start.end())
|
||
next = start
|
||
while end:
|
||
next = openRE.search(text, next.end())
|
||
if not next: # termination
|
||
while nest: # close all pending
|
||
nest -=1
|
||
end0 = closeRE.search(text, end.end())
|
||
if end0:
|
||
end = end0
|
||
else:
|
||
break
|
||
spans.append((start.start(), end.end()))
|
||
break
|
||
while end.end() < next.start():
|
||
# { } {
|
||
if nest:
|
||
nest -= 1
|
||
# try closing more
|
||
last = end.end()
|
||
end = closeRE.search(text, end.end())
|
||
if not end: # unbalanced
|
||
if spans:
|
||
span = (spans[0][0], last)
|
||
else:
|
||
span = (start.start(), last)
|
||
spans = [span]
|
||
break
|
||
else:
|
||
spans.append((start.start(), end.end()))
|
||
# advance start, find next close
|
||
start = next
|
||
end = closeRE.search(text, next.end())
|
||
break # { }
|
||
if next != start:
|
||
# { { }
|
||
nest += 1
|
||
# collect text outside partitions
|
||
return dropSpans(spans, text)
|
||
|
||
def dropSpans(spans, text):
|
||
"""
|
||
Drop from text the blocks identified in :param spans:, possibly nested.
|
||
"""
|
||
spans.sort()
|
||
res = ''
|
||
offset = 0
|
||
for s, e in spans:
|
||
if offset <= s: # handle nesting
|
||
if offset < s:
|
||
res += text[offset:s]
|
||
offset = e
|
||
res += text[offset:]
|
||
return res
|
||
|
||
# Match interwiki links, | separates parameters.
|
||
# First parameter is displayed, also trailing concatenated text included
|
||
# in display, e.g. 's' for plural).
|
||
#
|
||
# Can be nested [[File:..|..[[..]]..|..]], [[Category:...]], etc.
|
||
# We first expand inner ones, than remove enclosing ones.
|
||
# Deal also with: [[Help:IPA for Catalan|[anˈdɔra]]]
|
||
|
||
parametrizedLink = re.compile(r'\[\[[^\]]*?]]')
|
||
|
||
# Function applied to wikiLinks
|
||
def make_anchor_tag(link, trail):
|
||
if link[1] == '[':
|
||
parts = splitParameters(link[2:-2])
|
||
else:
|
||
parts = splitParameters(link[1:-1])
|
||
link = parts[0]
|
||
colon = link.find(':')
|
||
if colon > 0 and link[:colon] not in acceptedNamespaces:
|
||
return ''
|
||
if colon == 0:
|
||
# drop also :File:
|
||
colon2 = link.find(':', colon+1)
|
||
if colon2 > 1 and link[colon+1:colon2] not in acceptedNamespaces:
|
||
return ''
|
||
anchor = parts[-1] if len(parts) > 1 else link
|
||
anchor += trail
|
||
if keepLinks:
|
||
return '<a href="%s">%s</a>' % (urllib.quote(link.encode('utf-8')), anchor)
|
||
else:
|
||
return anchor
|
||
|
||
# ----------------------------------------------------------------------
|
||
|
||
# match tail after wikilink
|
||
tailRE = re.compile('\w*')
|
||
|
||
expand_templates = True
|
||
|
||
def clean(extractor, text):
|
||
"""
|
||
Transforms wiki markup.
|
||
@see https://www.mediawiki.org/wiki/Help:Formatting
|
||
"""
|
||
|
||
if (expand_templates):
|
||
# expand templates
|
||
# See: http://www.mediawiki.org/wiki/Help:Templates
|
||
text = extractor.expandTemplates(text)
|
||
else:
|
||
# Drop transclusions (template, parser functions)
|
||
text = dropNested(text, r'{{', r'}}')
|
||
|
||
# Drop tables
|
||
text = dropNested(text, r'{\|', r'\|}')
|
||
|
||
# Expand links
|
||
res = ''
|
||
cur = 0
|
||
# This is too slow.
|
||
# for m in wikiLink.finditer(text):
|
||
# res += text[cur:m.start()] + make_anchor_tag(m)
|
||
# cur = m.end()
|
||
# text = res + text[cur:]
|
||
# Matches also: [[Help:IPA for Spanish|[a'ðoβe]]]
|
||
for s,e in findBalanced(text, ['[[', '['], [']]', ']']):
|
||
m = tailRE.match(text, e)
|
||
if m:
|
||
trail = m.group(0)
|
||
end = m.end()
|
||
else:
|
||
trail = ''
|
||
end = e
|
||
res += text[cur:s] + make_anchor_tag(text[s:e], trail)
|
||
cur = end
|
||
text = res + text[cur:]
|
||
|
||
# Drop all remaining ones
|
||
text = parametrizedLink.sub('', text)
|
||
|
||
# Handle external links
|
||
text = externalLink.sub(r'\1', text)
|
||
text = externalLinkNoAnchor.sub('', text)
|
||
|
||
# Handle bold/italic/quote
|
||
text = bold_italic.sub(r'\1', text)
|
||
text = bold.sub(r'\1', text)
|
||
text = italic_quote.sub(r'"\1"', text)
|
||
text = italic.sub(r'"\1"', text)
|
||
text = quote_quote.sub(r'\1', text)
|
||
# residuals of unbalanced quotes
|
||
text = text.replace("'''", '').replace("''", '"')
|
||
|
||
# drop MagicWords behavioral switches
|
||
text = magicWordsRE.sub('', text)
|
||
|
||
################ Process HTML ###############
|
||
|
||
# turn into HTML
|
||
text = unescape(text)
|
||
# do it again (&nbsp;)
|
||
text = unescape(text)
|
||
|
||
# Collect spans
|
||
|
||
spans = []
|
||
# Drop HTML comments
|
||
for m in comment.finditer(text):
|
||
spans.append((m.start(), m.end()))
|
||
|
||
# Drop self-closing tags
|
||
for pattern in selfClosing_tag_patterns:
|
||
for m in pattern.finditer(text):
|
||
spans.append((m.start(), m.end()))
|
||
|
||
# Drop ignored tags
|
||
for left, right in ignored_tag_patterns:
|
||
for m in left.finditer(text):
|
||
spans.append((m.start(), m.end()))
|
||
for m in right.finditer(text):
|
||
spans.append((m.start(), m.end()))
|
||
|
||
# Bulk remove all spans
|
||
text = dropSpans(spans, text)
|
||
|
||
# Drop discarded elements
|
||
for tag in discardElements:
|
||
text = dropNested(text, r'<\s*%s\b[^>/]*>' % tag, r'<\s*/\s*%s>' % tag)
|
||
|
||
# Expand placeholders
|
||
for pattern, placeholder in placeholder_tag_patterns:
|
||
index = 1
|
||
for match in pattern.finditer(text):
|
||
text = text.replace(match.group(), '%s_%d' % (placeholder, index))
|
||
index += 1
|
||
|
||
text = text.replace('<<', u'«').replace('>>', u'»')
|
||
|
||
#############################################
|
||
|
||
# Cleanup text
|
||
text = text.replace('\t', ' ')
|
||
text = spaces.sub(' ', text)
|
||
text = dots.sub('...', text)
|
||
text = re.sub(u' (,:\.\)\]»)', r'\1', text)
|
||
text = re.sub(u'(\[\(«) ', r'\1', text)
|
||
text = re.sub(r'\n\W+?\n', '\n', text) # lines with only punctuations
|
||
text = text.replace(',,', ',').replace(',.', '.')
|
||
return text
|
||
|
||
# skip level 1, it is page name level
|
||
section = re.compile(r'(==+)\s*(.*?)\s*\1')
|
||
|
||
def compact(text):
|
||
"""Deal with headers, lists, empty sections, residuals of tables"""
|
||
page = [] # list of paragraph
|
||
headers = {} # Headers for unfilled sections
|
||
emptySection = False # empty sections are discarded
|
||
inList = False # whether opened <UL>
|
||
|
||
for line in text.split('\n'):
|
||
|
||
if not line:
|
||
continue
|
||
# Handle section titles
|
||
m = section.match(line)
|
||
if m:
|
||
title = m.group(2)
|
||
lev = len(m.group(1))
|
||
if keepSections:
|
||
page.append("<h%d>%s</h%d>" % (lev, title, lev))
|
||
if title and title[-1] not in '!?':
|
||
title += '.'
|
||
headers[lev] = title
|
||
# drop previous headers
|
||
for i in headers.keys():
|
||
if i > lev:
|
||
del headers[i]
|
||
emptySection = True
|
||
continue
|
||
# Handle page title
|
||
if line.startswith('++'):
|
||
title = line[2:-2]
|
||
if title:
|
||
if title[-1] not in '!?':
|
||
title += '.'
|
||
page.append(title)
|
||
# handle indents
|
||
elif line[0] == ':':
|
||
#page.append(line.lstrip(':*#;'))
|
||
continue
|
||
# handle lists
|
||
elif line[0] in '*#;':
|
||
if keepSections:
|
||
line = line.lstrip(line[0]).strip()
|
||
if line:
|
||
page.append("<li>%s</li>" % line)
|
||
else:
|
||
continue
|
||
|
||
# Drop residuals of lists
|
||
elif line[0] in '{|' or line[-1] in '}':
|
||
continue
|
||
# Drop irrelevant lines
|
||
elif (line[0] == '(' and line[-1] == ')') or line.strip('.-') == '':
|
||
continue
|
||
elif len(headers):
|
||
if not keepSections:
|
||
items = headers.items()
|
||
items.sort()
|
||
for (i, v) in items:
|
||
page.append(v)
|
||
headers.clear()
|
||
page.append(line) # first line
|
||
emptySection = False
|
||
elif not emptySection:
|
||
page.append(line)
|
||
# dangerous
|
||
# # Drop preformatted
|
||
# elif line[0] == ' ':
|
||
# continue
|
||
|
||
return page
|
||
|
||
def handle_unicode(entity):
|
||
numeric_code = int(entity[2:-1])
|
||
if numeric_code >= 0x10000: return ''
|
||
return unichr(numeric_code)
|
||
|
||
#------------------------------------------------------------------------------
|
||
# Output
|
||
|
||
class NextFile(object):
|
||
"""
|
||
Synchronous generation of next available file name.
|
||
"""
|
||
|
||
filesPerDir = 100
|
||
|
||
def __init__(self, lock, path_name):
|
||
self.lock = lock
|
||
self.path_name = path_name
|
||
self.dir_index = -1
|
||
self.file_index = -1
|
||
|
||
def next(self):
|
||
with self.lock:
|
||
self.file_index = (self.file_index + 1) % NextFile.filesPerDir
|
||
if self.file_index == 0:
|
||
self.dir_index += 1
|
||
dirname = self._dirname()
|
||
if not os.path.isdir(dirname):
|
||
os.makedirs(dirname)
|
||
return self._filepath()
|
||
|
||
def _dirname(self):
|
||
char1 = self.dir_index % 26
|
||
char2 = self.dir_index / 26 % 26
|
||
return os.path.join(self.path_name, '%c%c' % (ord('A') + char2, ord('A') + char1))
|
||
|
||
def _filepath(self):
|
||
return '%s/wiki_%02d' % (self._dirname(), self.file_index)
|
||
|
||
class OutputSplitter(object):
|
||
"""
|
||
File-like object, that splits output to multiple files of a given max size.
|
||
"""
|
||
|
||
def __init__(self, nextFile, max_file_size=0, compress=True):
|
||
"""
|
||
:param nextfile: a NextFile object from which to obtain filenames
|
||
to use.
|
||
:param max_file_size: the maximum size of each file.
|
||
:para compress: whether to write data with bzip compression.
|
||
"""
|
||
self.nextFile = nextFile
|
||
self.compress = compress
|
||
self.max_file_size = max_file_size
|
||
self.file = self.open(self.nextFile.next())
|
||
|
||
def reserve(self, size):
|
||
if self.file.tell() + size > self.max_file_size:
|
||
self.close()
|
||
self.file = self.open(self.nextFile.next())
|
||
|
||
def write(self, data):
|
||
self.file.write(data)
|
||
|
||
def close(self):
|
||
self.file.close()
|
||
|
||
def open(self, filename):
|
||
if self.compress:
|
||
return bz2.BZ2File(filename + '.bz2', 'w')
|
||
else:
|
||
return open(filename, 'w')
|
||
|
||
# ----------------------------------------------------------------------
|
||
# READER
|
||
|
||
tagRE = re.compile(r'(.*?)<(/?\w+)[^>]*>(?:([^<]*)(<.*?>)?)?')
|
||
# 1 2 3 4
|
||
#tagRE = re.compile(r'(.*?)<(/?\w+)[^>]*>([^<]*)')
|
||
|
||
def load_templates(file, output_file=None):
|
||
"""
|
||
Load templates from :param file:.
|
||
:param output_file: file where to save templates.
|
||
"""
|
||
templatePrefix = templateNamespace + ':'
|
||
articles = 0
|
||
page = []
|
||
inText = False
|
||
if output_file:
|
||
output = codecs.open(output_file, 'wb', 'utf-8')
|
||
for line in file:
|
||
line = line.decode('utf-8')
|
||
if '<' not in line: # faster than doing re.search()
|
||
if inText:
|
||
page.append(line)
|
||
continue
|
||
m = tagRE.search(line)
|
||
if not m:
|
||
continue
|
||
tag = m.group(2)
|
||
if tag == 'page':
|
||
page = []
|
||
elif tag == 'title':
|
||
title = m.group(3)
|
||
elif tag == 'text':
|
||
inText = True
|
||
line = line[m.start(3):m.end(3)]
|
||
page.append(line)
|
||
if m.lastindex == 4: # open-close
|
||
inText = False
|
||
elif tag == '/text':
|
||
if m.group(1):
|
||
page.append(m.group(1))
|
||
inText = False
|
||
elif inText:
|
||
page.append(line)
|
||
elif tag == '/page':
|
||
if title.startswith(templatePrefix):
|
||
define_template(title, page)
|
||
if output_file:
|
||
output.write('<page>\n')
|
||
output.write(' <title>%s</title>\n' % title)
|
||
output.write(' <ns>10</ns>\n')
|
||
output.write(' <text>')
|
||
for line in page:
|
||
output.write(line)
|
||
output.write(' </text>\n')
|
||
output.write('</page>\n')
|
||
page = []
|
||
articles += 1
|
||
if articles % 10000 == 0:
|
||
logging.info("Preprocessed: %d pages" % articles)
|
||
|
||
def process_dump(input_file, template_file, outdir, file_size, file_compress, threads):
|
||
"""
|
||
:param input_file: name of the wikipedia dump file.
|
||
:param template_file: optional file with template definitions.
|
||
:param outdir: name of the directory where to store extracted files.
|
||
:param file_size: max size of each extracted file.
|
||
:param file_compress: whether to compress files with bzip.
|
||
"""
|
||
global urlbase
|
||
global knownNamespaces
|
||
global templateNamespace
|
||
global expand_templates
|
||
|
||
if input_file.lower().endswith("bz2"):
|
||
opener = bz2.BZ2File
|
||
else:
|
||
opener = open
|
||
|
||
input = opener(input_file)
|
||
|
||
# collect siteinfo
|
||
for line in input:
|
||
line = line.decode('utf-8')
|
||
m = tagRE.search(line)
|
||
if not m:
|
||
continue
|
||
tag = m.group(2)
|
||
if tag == 'base':
|
||
# discover urlbase from the xml dump file
|
||
# /mediawiki/siteinfo/base
|
||
base = m.group(3)
|
||
urlbase = base[:base.rfind("/")]
|
||
elif tag == 'namespace':
|
||
knownNamespaces.add(m.group(3))
|
||
if re.search('key="10"', line):
|
||
templateNamespace = m.group(3)
|
||
elif tag == '/siteinfo':
|
||
break
|
||
|
||
if expand_templates:
|
||
# preprocess
|
||
logging.info("Preprocessing dump to collect template definitions: this may take some time.")
|
||
if template_file and os.path.exists(template_file):
|
||
input.close()
|
||
with open(template_file) as file:
|
||
load_templates(file)
|
||
else:
|
||
load_templates(input, template_file)
|
||
input.close()
|
||
input = opener(input_file)
|
||
|
||
# process pages
|
||
logging.info("Starting processing pages from %s." % input_file)
|
||
|
||
# initialize jobs queue
|
||
#threads = multiprocessing.cpu_count()
|
||
logging.info("Using %d CPUs." % threads)
|
||
queue = Queue.Queue(maxsize=2 * threads)
|
||
lock = threading.Lock() # for protecting shared state.
|
||
|
||
nextFile = NextFile(lock, outdir)
|
||
|
||
# start worker threads
|
||
workers = []
|
||
for _ in xrange(max(1, threads - 1)): # keep one for master
|
||
output_splitter = OutputSplitter(nextFile, file_size, file_compress)
|
||
extractor = ExtractorThread(queue, output_splitter)
|
||
workers.append(extractor)
|
||
|
||
# we collect indivual lines, since str.join() is significantly faster than
|
||
# concatenation
|
||
page = []
|
||
id = None
|
||
inText = False
|
||
redirect = False
|
||
for line in input:
|
||
line = line.decode('utf-8')
|
||
if '<' not in line: # faster than doing re.search()
|
||
if inText:
|
||
page.append(line)
|
||
continue
|
||
m = tagRE.search(line)
|
||
if not m:
|
||
continue
|
||
tag = m.group(2)
|
||
if tag == 'page':
|
||
page = []
|
||
redirect = False
|
||
elif tag == 'id' and not id:
|
||
id = m.group(3)
|
||
elif tag == 'title':
|
||
title = m.group(3)
|
||
elif tag == 'redirect':
|
||
redirect = True
|
||
elif tag == 'text':
|
||
inText = True
|
||
line = line[m.start(3):m.end(3)]
|
||
page.append(line)
|
||
if m.lastindex == 4: # open-close
|
||
inText = False
|
||
elif tag == '/text':
|
||
if m.group(1):
|
||
page.append(m.group(1))
|
||
inText = False
|
||
elif inText:
|
||
page.append(line)
|
||
elif tag == '/page':
|
||
colon = title.find(':')
|
||
if (colon < 0 or title[:colon] in acceptedNamespaces) and \
|
||
not redirect and not title.startswith(templateNamespace):
|
||
queue.put(Extractor(id, title, page), True) # block if full
|
||
id = None
|
||
page = []
|
||
|
||
# wait for empty queue
|
||
queue.join()
|
||
|
||
input.close()
|
||
|
||
|
||
#----------------------------------------------------------------------
|
||
# Multithread version
|
||
|
||
class ExtractorThread(threading.Thread):
|
||
"""
|
||
Extractor thread.
|
||
"""
|
||
def __init__(self, queue, splitter):
|
||
self._queue = queue
|
||
self._splitter = splitter
|
||
threading.Thread.__init__(self)
|
||
self.setDaemon(True) # let the process die when main thread is killed
|
||
self.start()
|
||
|
||
def run(self):
|
||
while True:
|
||
job = self._queue.get()
|
||
if job:
|
||
job.extract(self._splitter)
|
||
self._queue.task_done()
|
||
else:
|
||
break
|
||
|
||
# ----------------------------------------------------------------------
|
||
|
||
# Minimum size of output files
|
||
minFileSize = 200 * 1024
|
||
|
||
def main():
|
||
global keepLinks, keepSections, urlbase, acceptedNamespaces
|
||
global expand_templates
|
||
|
||
parser = argparse.ArgumentParser(prog=os.path.basename(sys.argv[0]),
|
||
formatter_class=argparse.RawDescriptionHelpFormatter,
|
||
description=__doc__)
|
||
parser.add_argument("input",
|
||
help="XML wiki dump file")
|
||
parser.add_argument("-o", "--output", default="text",
|
||
help="output directory")
|
||
parser.add_argument("-b", "--bytes", default="1M",
|
||
help="put specified bytes per output file (default is %(default)s)", metavar="n[KMG]")
|
||
parser.add_argument("-B", "--base",
|
||
help="base URL for the Wikipedia pages")
|
||
parser.add_argument("-c", "--compress", action="store_true",
|
||
help="compress output files using bzip")
|
||
parser.add_argument("-l", "--links", action="store_true",
|
||
help="preserve links")
|
||
parser.add_argument("-ns", "--namespaces", default="", metavar="ns1,ns2",
|
||
help="accepted namespaces")
|
||
parser.add_argument("-q", "--quiet", action="store_true",
|
||
help="suppress reporting progress info")
|
||
parser.add_argument("--debug", action="store_true",
|
||
help="print debug info")
|
||
parser.add_argument("-s", "--sections", action="store_true",
|
||
help="preserve sections")
|
||
parser.add_argument("-a", "--article", action="store_true",
|
||
help="analyze a file containing a single article (debug) option")
|
||
# parser.add_argument("-f", "--format", choices=(PLAIN, JSON), default=PLAIN,
|
||
# help="choose output format default is %(default)s")
|
||
parser.add_argument("--templates",
|
||
help="use or create file containing templates")
|
||
parser.add_argument("--no-templates", action="store_false",
|
||
help="Do not expand templates")
|
||
parser.add_argument("--threads", type=int, default=2,
|
||
help="Number of threads to use (default 2)")
|
||
parser.add_argument("-v", "--version", action="version",
|
||
version='%(prog)s ' + version,
|
||
help="print program version")
|
||
|
||
args = parser.parse_args()
|
||
|
||
keepLinks = args.links
|
||
keepSections = args.sections
|
||
expand_templates = args.no_templates
|
||
|
||
if args.base:
|
||
urlbase = args.base
|
||
|
||
try:
|
||
power = 'kmg'.find(args.bytes[-1].lower()) + 1
|
||
file_size = int(args.bytes[:-1]) * 1024 ** power
|
||
if file_size < minFileSize: raise ValueError()
|
||
except ValueError:
|
||
logging.error('Insufficient or invalid size: %s' % args.bytes)
|
||
return
|
||
|
||
if args.namespaces:
|
||
acceptedNamespaces = set(args.ns.split(','))
|
||
|
||
logger = logging.getLogger()
|
||
if not args.quiet:
|
||
logger.setLevel(logging.INFO)
|
||
if args.debug:
|
||
logger.setLevel(logging.DEBUG)
|
||
|
||
input_file = args.input
|
||
|
||
if not keepLinks:
|
||
ignoreTag('a')
|
||
|
||
if args.article:
|
||
if args.templates:
|
||
if os.path.exists(args.templates):
|
||
with open(args.templates) as file:
|
||
load_templates(file)
|
||
|
||
with open(input_file) as file:
|
||
page = file.read().decode('utf-8')
|
||
m = re.search(r'<id>(.*)</id>', page)
|
||
id = m.group(1) if m else 0
|
||
m = re.search(r'<title>(.*)</title>', page)
|
||
if m:
|
||
title = m.group(1)
|
||
Extractor(id, title, [page]).extract()
|
||
return
|
||
|
||
output_dir = args.output
|
||
if not os.path.isdir(output_dir):
|
||
try:
|
||
os.makedirs(output_dir)
|
||
except:
|
||
logging.error('Could not create: %s' % output_dir)
|
||
return
|
||
|
||
process_dump(input_file, args.templates, output_dir, file_size,
|
||
args.compress, args.threads)
|
||
|
||
if __name__ == '__main__':
|
||
main()
|