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import re
import subprocess
import json
import zipfile
import tempfile
import shutil
import os
from . import abstract, parser_factory
class OfficeParser(abstract.AbstractParser):
mimetypes = {
'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
'application/vnd.openxmlformats-officedocument.presentationml.presentation'
}
files_to_keep = {'_rels/.rels', 'word/_rels/document.xml.rels'}
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.startswith('docProps/') and item.endswith('.xml'):
content = zipin.read(item).decode('utf-8')
for (key, value) in re.findall(r"<(.+)>(.+)</\1>", content, re.I):
metadata[key] = value
if not metadata: # better safe than sorry
metadata[item] = 'harmful content'
zipin.close()
return metadata
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.startswith('docProps/'):
if not item.filename.endswith('.rels'):
continue # don't keep metadata files
if item.filename in self.files_to_keep:
zout.writestr(item, zin.read(item))
continue
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()
zout.write(tmp_parser.output_filename, item.filename)
shutil.rmtree(temp_folder)
zout.close()
zin.close()
return True
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