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Mini Shell
Mini Shell
'''
Read meta information from Plucker pdb files.
'''
__license__ = 'GPL v3'
__copyright__ = '2009, John Schember <john@nachtimwald.com>'
__docformat__ = 'restructuredtext en'
import struct
from datetime import datetime
from calibre.ebooks.metadata import MetaInformation
from calibre.ebooks.pdb.header import PdbHeaderReader
from calibre.ebooks.pdb.plucker.reader import SectionHeader, DATATYPE_METADATA, \
MIBNUM_TO_NAME
def get_metadata(stream, extract_cover=True):
'''
Return metadata as a L{MetaInfo} object
'''
mi = MetaInformation(_('Unknown'), [_('Unknown')])
stream.seek(0)
pheader = PdbHeaderReader(stream)
section_data = None
for i in range(1, pheader.num_sections):
raw_data = pheader.section_data(i)
section_header = SectionHeader(raw_data)
if section_header.type == DATATYPE_METADATA:
section_data = raw_data[8:]
break
if not section_data:
return mi
default_encoding = 'latin-1'
record_count, = struct.unpack('>H', section_data[0:2])
adv = 0
title = None
author = None
pubdate = 0
for i in range(record_count):
try:
type, length = struct.unpack_from('>HH', section_data, 2 + adv)
except struct.error:
break
# CharSet
if type == 1:
val, = struct.unpack('>H', section_data[6+adv:8+adv])
default_encoding = MIBNUM_TO_NAME.get(val, 'latin-1')
# Author
elif type == 4:
author = section_data[6+adv+(2*length)]
# Title
elif type == 5:
title = section_data[6+adv+(2*length)]
# Publication Date
elif type == 6:
pubdate, = struct.unpack('>I', section_data[6+adv:6+adv+4])
adv += 2*length
if title:
mi.title = title.replace('\0', '').decode(default_encoding, 'replace')
if author:
author = author.replace('\0', '').decode(default_encoding, 'replace')
mi.author = author.split(',')
mi.pubdate = datetime.fromtimestamp(pubdate)
return mi
Zerion Mini Shell 1.0