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import re
import subprocess
import json
import zipfile
import tempfile
import shutil
import os
from . import abstract, parser_factory
class LibreOfficeParser(abstract.AbstractParser):
mimetypes = {
'application/vnd.oasis.opendocument.text',
'application/vnd.oasis.opendocument.spreadsheet',
'application/vnd.oasis.opendocument.presentation',
'application/vnd.oasis.opendocument.graphics',
'application/vnd.oasis.opendocument.chart'
}
def get_meta(self):
"""
Yes, I know that parsing xml with regexp ain't pretty,
be my guest and fix it if you want.
"""
metadata = {}
zipin = zipfile.ZipFile(self.filename)
for item in zipin.namelist():
if item == 'meta.xml':
content = zipin.read(item).decode('utf-8')
for (key, value) in re.findall(r"<((?:meta|dc).+?)>(.+)</\1>", content, re.I):
metadata[key] = value
if not metadata: # better safe than sorry
metadata[item] = 'harmful content'
zipin.close()
return metadata
def __clean_zipinfo(self, zipinfo:zipfile.ZipInfo) -> zipfile.ZipInfo:
zipinfo.compress_type = zipfile.ZIP_DEFLATED
zipinfo.create_system = 3 # Linux
zipinfo.comment = b''
zipinfo.date_time = (1980, 1, 1, 0, 0, 0)
return zipinfo
def remove_all(self):
zin = zipfile.ZipFile(self.filename, 'r')
zout = zipfile.ZipFile(self.output_filename, 'w')
temp_folder = tempfile.mkdtemp()
for item in zin.infolist():
if item.filename[-1] == '/':
continue # `is_dir` is added in Python3.6
elif item.filename == 'meta.xml':
continue # don't keep metadata files
zin.extract(member=item, path=temp_folder)
tmp_parser = parser_factory.get_parser(os.path.join(temp_folder, item.filename))
if tmp_parser is None:
print("%s isn't supported" % item.filename)
continue
tmp_parser.remove_all()
zinfo = zipfile.ZipInfo(item.filename)
item = self.__clean_zipinfo(item)
with open(tmp_parser.output_filename, 'rb') as f:
zout.writestr(zinfo, f.read())
shutil.rmtree(temp_folder)
zout.close()
zin.close()
return True
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