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Various encoding fix-ups. Fix for broken file(s?) from Penguin.

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This commit is contained in:
Marshall T. Vandegrift 2008-07-19 18:24:59 -04:00
parent 006182e5f4
commit a349d76379
1 changed files with 23 additions and 17 deletions
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38
src/calibre/ebooks/lit/reader.py
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@ -8,6 +8,7 @@ __copyright__ = '2008, Kovid Goyal <kovid at kovidgoyal.net>'
import sys, struct, cStringIO, os import sys, struct, cStringIO, os
import functools import functools
import codecs
from itertools import repeat from itertools import repeat
from calibre import relpath from calibre import relpath
@ -33,7 +34,6 @@ HTML_DECL = """<?xml version="1.0" encoding="UTF-8" ?>
DESENCRYPT_GUID = "{67F6E4A2-60BF-11D3-8540-00C04F58C3CF}" DESENCRYPT_GUID = "{67F6E4A2-60BF-11D3-8540-00C04F58C3CF}"
LZXCOMPRESS_GUID = "{0A9007C6-4076-11D3-8789-0000F8105754}" LZXCOMPRESS_GUID = "{0A9007C6-4076-11D3-8789-0000F8105754}"
LZXC_TAG = 0x43585a4c
CONTROL_TAG = 4 CONTROL_TAG = 4
CONTROL_WINDOW_SIZE = 12 CONTROL_WINDOW_SIZE = 12
RESET_NENTRIES = 4 RESET_NENTRIES = 4
@ -41,11 +41,11 @@ RESET_HDRLEN = 12
RESET_UCLENGTH = 16 RESET_UCLENGTH = 16
RESET_INTERVAL = 32 RESET_INTERVAL = 32
FLAG_OPENING = 1 FLAG_OPENING = (1 << 0)
FLAG_CLOSING = 2 FLAG_CLOSING = (1 << 1)
FLAG_BLOCK = 4 FLAG_BLOCK = (1 << 2)
FLAG_HEAD = 8 FLAG_HEAD = (1 << 3)
FLAG_ATOM = 16 FLAG_ATOM = (1 << 4)
XML_ENTITIES = ['&amp;', '&apos;', '&lt;', '&gt;', '&quot;'] XML_ENTITIES = ['&amp;', '&apos;', '&lt;', '&gt;', '&quot;']
def u32(bytes): def u32(bytes):
@ -202,7 +202,7 @@ class UnBinary(object):
is_goingdown = False is_goingdown = False
if not tag_name: if not tag_name:
raise LitError('Tag ends before it begins.') raise LitError('Tag ends before it begins.')
self.buf.write('</'+tag_name+'>') self.buf.write(u''.join(('</', tag_name, '>')).encode('utf-8'))
dynamic_tag = 0 dynamic_tag = 0
tag_name = None tag_name = None
state = 'text' state = 'text'
@ -252,7 +252,7 @@ class UnBinary(object):
state = 'get attr' state = 'get attr'
elif count > 0: elif count > 0:
if not in_censorship: if not in_censorship:
self.buf.write(c) self.buf.write(unicode(c).encode('utf-8'))
count -= 1 count -= 1
if count == 0: if count == 0:
if not in_censorship: if not in_censorship:
@ -272,7 +272,7 @@ class UnBinary(object):
tag_name += c tag_name += c
count -= 1 count -= 1
if count == 0: if count == 0:
self.buf.write(tag_name) self.buf.write(unicode(tag_name).encode('utf-8'))
state = 'get attr' state = 'get attr'
elif state == 'get attr length': elif state == 'get attr length':
@ -283,7 +283,7 @@ class UnBinary(object):
state = 'get custom attr' state = 'get custom attr'
elif state == 'get custom attr': elif state == 'get custom attr':
self.buf.write(c) self.buf.write(unicode(c).encode('utf-8'))
count -= 1 count -= 1
if count == 0: if count == 0:
self.buf.write('=') self.buf.write('=')
@ -592,6 +592,12 @@ class LitReader(object):
def _read_meta(self): def _read_meta(self):
raw = self.get_file('/meta') raw = self.get_file('/meta')
try:
xml = OPF_DECL + unicode(UnBinary(raw, self.manifest, OPF_MAP))
except LitError:
if 'PENGUIN group' not in raw: raise
print "WARNING: attempting PENGUIN malformed OPF fix"
raw = raw.replace('PENGUIN group', '\x00\x01\x18\x00PENGUIN group', 1)
xml = OPF_DECL + unicode(UnBinary(raw, self.manifest, OPF_MAP)) xml = OPF_DECL + unicode(UnBinary(raw, self.manifest, OPF_MAP))
self.meta = xml self.meta = xml
@ -669,8 +675,8 @@ class LitReader(object):
control = control[csize:] control = control[csize:]
elif guid == LZXCOMPRESS_GUID: elif guid == LZXCOMPRESS_GUID:
reset_table = self.get_file( reset_table = self.get_file(
'/'.join(['::DataSpace/Storage', name, 'Transform', '/'.join(('::DataSpace/Storage', name, 'Transform',
LZXCOMPRESS_GUID, 'InstanceData/ResetTable'])) LZXCOMPRESS_GUID, 'InstanceData/ResetTable')))
content = self._decompress(content, control, reset_table) content = self._decompress(content, control, reset_table)
control = control[csize:] control = control[csize:]
else: else:
@ -684,7 +690,7 @@ class LitReader(object):
return msdes.new(self.bookkey).decrypt(content) return msdes.new(self.bookkey).decrypt(content)
def _decompress(self, content, control, reset_table): def _decompress(self, content, control, reset_table):
if len(control) < 32 or u32(control[CONTROL_TAG:]) != LZXC_TAG: if len(control) < 32 or control[CONTROL_TAG:CONTROL_TAG+4] != "LZXC":
raise LitError("Invalid ControlData tag value") raise LitError("Invalid ControlData tag value")
if len(reset_table) < (RESET_INTERVAL + 8): if len(reset_table) < (RESET_INTERVAL + 8):
raise LitError("Reset table is too short") raise LitError("Reset table is too short")
@ -743,16 +749,16 @@ class LitReader(object):
opf_path = os.path.join(output_dir, opf_path) opf_path = os.path.join(output_dir, opf_path)
self._ensure_dir(opf_path) self._ensure_dir(opf_path)
with open(opf_path, 'w') as f: with open(opf_path, 'w') as f:
f.write(self.get_markup_file('/meta').encode('utf-8')) f.write(self.meta.encode('utf-8'))
for entry in self.manifest.values(): for entry in self.manifest.values():
path = os.path.join(output_dir, entry.path) path = os.path.join(output_dir, entry.path)
self._ensure_dir(path) self._ensure_dir(path)
with open(path, 'w') as f: with open(path, 'w') as f:
if 'spine' in entry.state: if 'spine' in entry.state:
name = '/'.join(['/data', entry.internal, 'content']) name = '/'.join(('/data', entry.internal, 'content'))
f.write(self.get_markup_file(name).encode('utf-8')) f.write(self.get_markup_file(name).encode('utf-8'))
else: else:
name = '/'.join(['/data', entry.internal]) name = '/'.join(('/data', entry.internal))
f.write(self.get_file(name)) f.write(self.get_file(name))
def _ensure_dir(self, path): def _ensure_dir(self, path):