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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# create index
# use https://bitbucket.org/james_taylor/seek-bzip2
import codecs
import os
import sys
from subprocess import call, Popen, PIPE, STDOUT
import shutil
import re
import logging
import config
input_xml_file_name = config.input_xml_file_name
def normalize_title(title):
return title.strip().replace(' ', '_').capitalize()
def create_index(pages_blacklist):
output_file = open("%s.processed.idx" % input_xml_file_name, mode='w')
num_block = 1
index_file = open("%s.processed.bz2t" % input_xml_file_name, mode='r')
index_line = index_file.readline()
while index_line:
parts = index_line.split()
block_start = int(parts[0])
print "Block %d starts at %d" % (num_block, block_start)
position = 0
# extract the block
bzip_file = open("%s.processed.bz2" % input_xml_file_name, mode='r')
cmd = ['../bin/%s/seek-bunzip' % config.system_id, str(block_start)]
p = Popen(cmd, stdin=bzip_file, stdout=PIPE, stderr=STDOUT,
close_fds=True)
data_line = p.stdout.readline()
while data_line:
position += len(data_line)
#print data_line
if len(data_line) == 2:
if ord(data_line[0]) == 1:
title = p.stdout.readline()
position += len(title)
# read article size
# size
size_line = p.stdout.readline()
position += len(size_line)
# \02
data_line = p.stdout.readline()
position += len(data_line)
title = title[0:-1].strip().capitalize()
if title not in pages_blacklist:
output_file.write("%s %d %d\n" % \
(title, num_block, position))
print "Article %s block %d position %d" % \
(title, num_block, position)
else:
print "* Blacklisted %s " % title
data_line = p.stdout.readline()
num_block += 1
index_line = index_file.readline()
output_file.close()
class FileListReader():
def __init__(self, file_name):
_file = codecs.open(file_name,
encoding='utf-8', mode='r')
self.list = []
line = _file.readline()
while line:
self.list.append(normalize_title(line))
line = _file.readline()
class RedirectParser:
def __init__(self, file_name):
self.link_re = re.compile('\[\[.*?\]\]')
# Load redirects
input_redirects = codecs.open('%s.redirects_used' % file_name,
encoding='utf-8', mode='r')
self.redirects = {}
for line in input_redirects.readlines():
links = self.link_re.findall(unicode(line))
if len(links) == 2:
origin = links[0][2:-2]
destination = links[1][2:-2]
self.redirects[origin] = destination
#print "Processing %s" % normalize_title(origin)
logging.error("Loaded %d redirects" % len(self.redirects))
input_redirects.close()
def create_sql_index(input_xml_file_name, pages_blacklist):
import sqlite3
dbpath = './search.db'
if os.path.exists(dbpath):
return
print 'Creating sqlite database file'
conn = sqlite3.connect(dbpath)
conn.execute("create table articles(title, block INTEGER, " +
"position INTEGER, redirect_to)")
text_index_file = codecs.open("%s.processed.idx" % input_xml_file_name,
encoding='utf-8', mode='r')
line = text_index_file.readline()
while line:
parts = line.split()
if len(parts) > 0:
title_article = parts[0]
block_article = parts[1]
position_article = parts[2]
title_article = normalize_title(title_article)
if title_article not in pages_blacklist:
if title_article.find("'") > -1:
title_article = title_article.replace("'", "\\'")
if title_article.find('"') > -1:
title_article = title_article.replace('"', '')
command = 'insert into articles values ("%s", %s, %s, "%s")' \
% (unicode(title_article), int(block_article),
int(position_article), unicode(''))
print ".",
conn.execute(command)
else:
print "* Blacklisted %s " % title_article
line = text_index_file.readline()
conn.commit()
# add redirects
redirects_parser = RedirectParser(input_xml_file_name)
for origin in redirects_parser.redirects.keys():
origin = normalize_title(origin)
try:
destination = normalize_title(redirects_parser.redirects[origin])
if origin not in pages_blacklist and \
destination not in pages_blacklist:
if origin.find("'") > -1:
origin = origin.replace("'", "\\'")
if destination.find("'") > -1:
destination = destination.replace("'", "\\'")
print ".",
conn.execute(
'insert into articles values ("%s", %s, %s, "%s")' %
(unicode(origin), 0, 0, unicode(destination)))
else:
print "* Blacklisted %s " % origin
except:
print "ERROR: origin %s destination %s" % (origin, destination)
text_index_file.close()
conn.commit()
def create_bzip_table():
"""
../seek-bzip2/seek-bzip2/bzip-table <
eswiki-20110810-pages-articles.xml.processed.bz2 >
eswiki-20110810-pages-articles.xml.processed.bz2t
"""
cmd = ['../bin/%s/bzip-table' % config.system_id]
bzip_file = open('%s.processed.bz2' % input_xml_file_name, mode='r')
table_file = open('%s.processed.bz2t' % input_xml_file_name, mode='w')
call(cmd, stdin=bzip_file, stdout=table_file, close_fds=True)
if len(sys.argv) > 1:
if sys.argv[1] == '--delete_old':
if os.path.exists('%s.processed.bz2' % input_xml_file_name):
os.remove('%s.processed.bz2' % input_xml_file_name)
if os.path.exists('%s.processed.bz2t' % input_xml_file_name):
os.remove('%s.processed.bz2t' % input_xml_file_name)
if os.path.exists('%s.processed.idx' % input_xml_file_name):
os.remove('%s.processed.idx' % input_xml_file_name)
if os.path.exists('search.db'):
os.remove('search.db')
if os.path.exists(config.blacklist_file_name):
pages_blacklisted_reader = FileListReader(config.blacklist_file_name)
pages_blacklist = pages_blacklisted_reader.list
print "Loaded %d blacklisted pages" % len(pages_blacklist)
else:
pages_blacklist = []
print 'Compressing .processed file'
if not os.path.exists('%s.processed.bz2' % input_xml_file_name):
cmd = ['bzip2', '-zk', '%s.processed' % input_xml_file_name]
p = call(cmd)
if os.path.exists('%s.processed.bz2t' % input_xml_file_name):
os.remove('%s.processed.bz2t' % input_xml_file_name)
else:
print '.bz2 already exists. Skipping'
if not os.path.exists('%s.processed.bz2t' % input_xml_file_name):
print 'Creating bzip2 table file'
create_bzip_table()
else:
print '.bz2t already exists. Skipping'
if not os.path.exists('%s.processed.idx' % input_xml_file_name):
print 'Creating index file'
create_index(pages_blacklist)
else:
print '.idx already exists. Skipping'
create_sql_index(input_xml_file_name, pages_blacklist)
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