def gunzip(data):
"""Gunzip the given data and return as much data as possible.
This is resilient to CRC checksum errors.
"""
f = GzipFile(fileobj=BytesIO(data))
output_list = []
chunk = b'.'
while chunk:
try:
chunk = f.read1(8196)
output_list.append(chunk)
except (IOError, EOFError, struct.error):
# complete only if there is some data, otherwise re-raise
# see issue 87 about catching struct.error
# some pages are quite small so output_list is empty and f.extrabuf
# contains the whole page content
if output_list or getattr(f, 'extrabuf', None):
try:
output_list.append(f.extrabuf[-f.extrasize:])
finally:
break
else:
raise
return b''.join(output_list)
def _open(self, path, mode='rb'):
fd = GzipFile(path, mode, self.comp_level)
fd.read1 = fd.read # Bug fix for email parser
return fd
