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#!/bin/env python
import argparse
import sys
import urllib.request
import dump2msgp
import msgPack2sqlite_msgPack
import subprocess
import os
from os.path import exists
URL_DUMP = 'https://dumps.wikimedia.org/frwiktionary/latest/frwiktionary-latest-pages-meta-current.xml.bz2'
def unbz2(file):
decomp = bz2.BZ2Decompressor()
buf = b''
for c in file:
buf += decomp.decompress(c)
while b'\n' in buf:
i = buf.index(b'\n')
if i + 1 < len(buf):
ret = buf[:i + 1]
buf = buf[i + 1:]
yield ret.decode('utf-8')
else:
yield buf.decode('utf-8')
buf = b''
if __name__ == '__main__':
parser = argparse.ArgumentParser(description='Download and create the database')
parser.add_argument('-o', '--output', dest='outputF', action='store',
help='the output, the database filename',
default='dfr.db')
parser.add_argument('-i', '--input', dest='dumpF', action='store',
help='the input dump file\'s filename',
default='')
parser.add_argument('-l', '--word-list', dest='wordList', action='store',
help='the alternative output, filename of the word list',
default=None)
parser.add_argument('-d', '--download', dest='download', action='store_true',
help='to download the lastest dump')
download = True
arg = parser.parse_args()
if not arg.wordList:
arg.wordList = arg.outputF + '.wordlist'
if arg.download and arg.dumpF:
print('''Incompatible options '-i' and '-d'.''')
exit(1)
elif arg.download:
arg.dumpF = URL_DUMP[URL_DUMP.rindex('/') + 1:]
elif arg.dumpF:
download = False
if not arg.dumpF or not arg.dumpF.endswith('bz2'):
print('A bz2 dump file filename needed', file=sys.stderr)
exit(-1)
if exists(arg.dumpF) and download:
print(f'{arg.dumpF} exists. Force downloading ? (y/N)')
answer = input('> ')
if answer.lower()[0] != 'y':
download = False
if download:
print(download);
print(f'Downloading the dump ({arg.dumpF})\nIt should take some time')
try:
urllib.request.urlretrieve(URL_DUMP, arg.dumpF)
except urllib.error.URLError:
print('Error: Unable to download from internet')
print(f'Check connection and source URL : ({ URL_DUMP })')
print('Exiting')
exit(-10)
except:
print('Download failed.')
print('Exiting')
exit(-1)
if not exists(arg.dumpF):
if download:
print('Download failed.\nExiting.', file=sys.stderr)
else:
print(f'Fichier { arg.dumpF } introuvable.\nArrΓͺt.')
exit(-2)
decompress = False
try:
print('Trying the bzip2 command')
assert(subprocess.call(['bzip2', '-d', arg.dumpF]) == 0)
decompress = True
except:
print('''The command "bzip" doesn't exists, or doesn't work as intended''')
print('Fallback to Python bz2 module decompressor')
# Decompression using bzip2
if not decompress:
try:
import bz2
with open(arg.dumpF, 'rb') as f:
it = iter(lambda: f.read(2**16), b'')
output_fn = arg.dumpF[:-4]
with open(output_fn, 'wb') as fout:
dcomp = bz2.BZ2Decompressor()
for chunk in it:
datal = len(chunk)
data = dcomp.decompress(chunk)
fout.write(data)
decompress = True
except:
print('''Python bz2 module decompressor failed, maybe you don't have any space available''')
print('Fallback to on the fly decompressor (RAM will be needed)')
if not decompress:
try:
# On the fly Decompression
with open(arg.dumpF, 'rb') as f:
it = iter(lambda: f.read(2**16), b'')
print('Data extraction on the fly')
res = dump2msgp.extractAll(unbz2(it), 'error.log', False)
with open(arg.wordList, 'wb'):
f.write('\n'.join(a.keys()))
msgPack2sqlite_msgPack.writeDB(arg.outputF, res)
print(f'Word list { arg.wordList } created ! π π')
print(f'Database { arg.outputF } created ! π π')
except:
print('''Error: Can't extract the dump file''')
print('Exiting (-1)')
exit(-1)
print(f'Removing temporary files')
os.remove(arg.dumpF)
else:
try:
output_fn = arg.dumpF[:-4]
with open(output_fn, 'r') as f:
print('Create the database')
res = dump2msgp.extractAll(f, 'error.log', False)
msgPack2sqlite_msgPack.writeDB(arg.outputF, res)
print(f'Database { arg.outputF } created ! π π')
except:
print('Failed to extract database')
print('Exiting (-3)')
exit(-3)
print(f'Removing temporary files')
os.remove(output_fn)
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