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Use the extended APNX content header for KF8 files, FW 3.4 seems to discard the file when the older

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format is used with a KF8 file...
This commit is contained in:
NiLuJe 2012-09-14 18:08:37 +02:00
parent 6e93e8fada
commit 8f62e20b9c
1 changed files with 40 additions and 9 deletions
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49
src/calibre/devices/kindle/apnx.py
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@ -12,7 +12,10 @@ import struct
from calibre.ebooks.mobi.reader.mobi6 import MobiReader
from calibre.ebooks.pdb.header import PdbHeaderReader
from calibre.ebooks.mobi.reader.headers import MetadataHeader
from calibre.utils.logging import default_log
from calibre import prints
from calibre.constants import DEBUG
class APNXBuilder(object):
'''
@ -25,12 +28,31 @@ class APNXBuilder(object):
pass in a value to page_count, otherwise a count will be estimated
using either the fast or accurate algorithm.
'''
import uuid
# Check that this is really a MOBI file.
with open(mobi_file_path, 'rb') as mf:
ident = PdbHeaderReader(mf).identity()
if ident != 'BOOKMOBI':
raise Exception(_('Not a valid MOBI file. Reports identity of %s') % ident)
# We'll need the PDB name, the MOBI version, and some metadata to make FW 3.4 happy with KF8 files...
apnx_meta = { 'guid': str(uuid.uuid4()).replace('-', '')[:8], 'asin': '', 'cdetype': 'EBOK', 'format': 'MOBI_7', 'acr': '' }
with open(mobi_file_path, 'rb') as mf:
apnx_meta['acr'] = str(PdbHeaderReader(mf).name())
mh = MetadataHeader(mf, default_log)
if mh.mobi_version == 8:
apnx_meta['format'] = 'MOBI_8'
else:
apnx_meta['format'] = 'MOBI_7'
if mh.exth is None or not mh.exth.cdetype:
apnx_meta['cdetype'] = 'EBOK'
else:
apnx_meta['cdetype'] = str(mh.exth.cdetype)
if mh.exth is None or not mh.exth.uuid:
apnx_meta['asin'] = ''
else:
apnx_meta['asin'] = str(mh.exth.uuid)
# Get the pages depending on the chosen parser
pages = []
if page_count:
@ -51,23 +73,32 @@ class APNXBuilder(object):
raise Exception(_('Could not generate page mapping.'))
# Generate the APNX file from the page mapping.
apnx = self.generate_apnx(pages)
apnx = self.generate_apnx(pages, apnx_meta)
# Write the APNX.
with open(apnx_path, 'wb') as apnxf:
apnxf.write(apnx)
def generate_apnx(self, pages):
import uuid
def generate_apnx(self, pages, apnx_meta):
apnx = ''
content_vals = {
'guid': str(uuid.uuid4()).replace('-', '')[:8],
'isbn': '',
}
if DEBUG:
prints('APNX META: guid:', apnx_meta['guid'])
prints('APNX META: ASIN:', apnx_meta['asin'])
prints('APNX META: CDE:', apnx_meta['cdetype'])
prints('APNX META: format:', apnx_meta['format'])
prints('APNX META: Name:', apnx_meta['acr'])
content_header = '{"contentGuid":"%(guid)s","asin":"%(isbn)s","cdeType":"EBOK","fileRevisionId":"1"}' % content_vals
page_header = '{"asin":"%(isbn)s","pageMap":"(1,a,1)"}' % content_vals
# Updated header if we have a KF8 file...
if apnx_meta['format'] == 'MOBI_8':
content_header = '{"contentGuid":"%(guid)s","asin":"%(asin)s","cdeType":"%(cdetype)s","format":"%(format)s","fileRevisionId":"1","acr":"%(acr)s"}' % apnx_meta
else:
# My 5.1.x Touch & 3.4 K3 seem to handle the 'extended' header fine for legacy mobi files, too. But, since they still handle this one too, let's try not to break old devices, and keep using the simple header ;).
content_header = '{"contentGuid":"%(guid)s","asin":"%(asin)s","cdeType":"%(cdetype)s","fileRevisionId":"1"}' % apnx_meta
page_header = '{"asin":"%(asin)s","pageMap":"(1,a,1)"}' % apnx_meta
if DEBUG:
prints('APNX Content Header:', content_header)
apnx += struct.pack('>I', 65537)
apnx += struct.pack('>I', 12 + len(content_header))