#!/usr/bin/env python
# License: GPLv3 Copyright: 2013, Kovid Goyal <kovid at kovidgoyal.net>
import errno
import hashlib
import logging
import os
import re
import shutil
import sys
import unicodedata
import uuid
from collections import defaultdict
from io import BytesIO
from itertools import count
from math import floor
from css_parser import getUrls, replaceUrls
from calibre import CurrentDir, walk
from calibre.constants import iswindows
from calibre.customize.ui import plugin_for_input_format, plugin_for_output_format
from calibre.ebooks import escape_xpath_attr
from calibre.ebooks.chardet import xml_to_unicode
from calibre.ebooks.conversion.plugins.epub_input import ADOBE_OBFUSCATION, IDPF_OBFUSCATION, decrypt_font_data
from calibre.ebooks.conversion.preprocess import CSSPreProcessor as cssp
from calibre.ebooks.conversion.preprocess import HTMLPreProcessor
from calibre.ebooks.metadata.opf3 import CALIBRE_PREFIX, ensure_prefix, items_with_property, read_prefixes
from calibre.ebooks.metadata.utils import parse_opf_version
from calibre.ebooks.mobi import MobiError
from calibre.ebooks.mobi.reader.headers import MetadataHeader
from calibre.ebooks.oeb.base import (
DC11_NS,
OEB_DOCS,
OEB_STYLES,
OPF,
OPF2_NS,
Manifest,
itercsslinks,
iterlinks,
rewrite_links,
serialize,
urlquote,
urlunquote,
)
from calibre.ebooks.oeb.parse_utils import NotHTML, parse_html
from calibre.ebooks.oeb.polish.errors import DRMError, InvalidBook
from calibre.ebooks.oeb.polish.parsing import parse as parse_html_tweak
from calibre.ebooks.oeb.polish.utils import OEB_FONTS, CommentFinder, PositionFinder, adjust_mime_for_epub, guess_type, parse_css
from calibre.ptempfile import PersistentTemporaryDirectory, PersistentTemporaryFile
from calibre.utils.filenames import hardlink_file, nlinks_file, retry_on_fail
from calibre.utils.ipc.simple_worker import WorkerError, fork_job
from calibre.utils.logging import default_log
from calibre.utils.xml_parse import safe_xml_fromstring
from calibre.utils.zipfile import ZipFile
from polyglot.builtins import iteritems
from polyglot.urllib import urlparse
exists, join, relpath = os.path.exists, os.path.join, os.path.relpath
OPF_NAMESPACES = {'opf':OPF2_NS, 'dc':DC11_NS}
null = object()
OEB_FONTS # for plugin compat
class CSSPreProcessor(cssp):
def __call__(self, data):
return self.MS_PAT.sub(self.ms_sub, data)
def clone_dir(src, dest):
' Clone a folder using hard links for the files, dest must already exist '
for x in os.listdir(src):
dpath = os.path.join(dest, x)
spath = os.path.join(src, x)
if os.path.isdir(spath):
os.mkdir(dpath)
clone_dir(spath, dpath)
else:
try:
hardlink_file(spath, dpath)
except:
shutil.copy2(spath, dpath)
def clone_container(container, dest_dir):
' Efficiently clone a container using hard links '
dest_dir = os.path.abspath(os.path.realpath(dest_dir))
clone_data = container.clone_data(dest_dir)
cls = type(container)
if cls is Container:
return cls(None, None, container.log, clone_data=clone_data)
return cls(None, container.log, clone_data=clone_data)
def name_to_abspath(name, root):
return os.path.abspath(join(root, *name.split('/')))
def abspath_to_name(path, root):
return relpath(os.path.abspath(path), root).replace(os.sep, '/')
def name_to_href(name, root, base=None, quote=urlquote):
fullpath = name_to_abspath(name, root)
basepath = root if base is None else os.path.dirname(name_to_abspath(base, root))
path = relpath(fullpath, basepath).replace(os.sep, '/')
return quote(path)
def href_to_name(href, root, base=None):
base = root if base is None else os.path.dirname(name_to_abspath(base, root))
try:
purl = urlparse(href)
except ValueError:
return None
if purl.scheme or not purl.path:
return None
href = urlunquote(purl.path)
if iswindows and ':' in href:
# path manipulations on windows fail for paths with : in them, so we
# assume all such paths are invalid/absolute paths.
return None
fullpath = os.path.join(base, *href.split('/'))
try:
return unicodedata.normalize('NFC', abspath_to_name(fullpath, root))
except ValueError:
return None
def seconds_to_timestamp(duration: float) -> str:
seconds = int(floor(duration))
float_part = duration - seconds
hours = seconds // 3600
minutes = (seconds % 3600) // 60
seconds = seconds % 60
ans = f'{hours:02d}:{minutes:02d}:{seconds:02d}'
if float_part:
ans += f'{float_part:.20f}'.rstrip('0')[1:]
return ans
class ContainerBase: # {{{
'''
A base class that implements just the parsing methods. Useful to create
virtual containers for testing.
'''
#: The mode used to parse HTML and CSS (polishing uses tweak_mode=False and the editor uses tweak_mode=True)
tweak_mode = False
def __init__(self, log):
self.log = log
self.parsed_cache = {}
self.mime_map = {}
self.encoding_map = {}
self.html_preprocessor = HTMLPreProcessor()
self.css_preprocessor = CSSPreProcessor()
def guess_type(self, name):
' Return the expected mimetype for the specified file name based on its extension. '
return adjust_mime_for_epub(filename=name, opf_version=self.opf_version_parsed)
def decode(self, data, normalize_to_nfc=True):
"""
Automatically decode ``data`` into a ``unicode`` object.
:param normalize_to_nfc: Normalize returned unicode to the NFC normal form as is required by both the EPUB and AZW3 formats.
"""
def fix_data(d):
return d.replace('\r\n', '\n').replace('\r', '\n')
if isinstance(data, str):
return fix_data(data)
bom_enc = None
if data[:4] in {b'\0\0\xfe\xff', b'\xff\xfe\0\0'}:
bom_enc = {b'\0\0\xfe\xff':'utf-32-be',
b'\xff\xfe\0\0':'utf-32-le'}[data[:4]]
data = data[4:]
elif data[:2] in {b'\xff\xfe', b'\xfe\xff'}:
bom_enc = {b'\xff\xfe':'utf-16-le', b'\xfe\xff':'utf-16-be'}[data[:2]]
data = data[2:]
elif data[:3] == b'\xef\xbb\xbf':
bom_enc = 'utf-8'
data = data[3:]
if bom_enc is not None:
try:
self.used_encoding = bom_enc
return fix_data(data.decode(bom_enc))
except UnicodeDecodeError:
pass
try:
self.used_encoding = 'utf-8'
return fix_data(data.decode('utf-8'))
except UnicodeDecodeError:
pass
data, self.used_encoding = xml_to_unicode(data)
if normalize_to_nfc:
data = unicodedata.normalize('NFC', data)
return fix_data(data)
def parse_xml(self, data):
data, self.used_encoding = xml_to_unicode(
data, strip_encoding_pats=True, assume_utf8=True, resolve_entities=True)
data = unicodedata.normalize('NFC', data)
return safe_xml_fromstring(data)
def parse_xhtml(self, data, fname='<string>', force_html5_parse=False):
if self.tweak_mode:
return parse_html_tweak(data, log=self.log, decoder=self.decode, force_html5_parse=force_html5_parse)
else:
try:
return parse_html(
data, log=self.log, decoder=self.decode,
preprocessor=self.html_preprocessor, filename=fname,
non_html_file_tags={'ncx'})
except NotHTML:
return self.parse_xml(data)
def parse_css(self, data, fname='<string>', is_declaration=False):
return parse_css(data, fname=fname, is_declaration=is_declaration, decode=self.decode, log_level=logging.WARNING,
css_preprocessor=(None if self.tweak_mode else self.css_preprocessor))
# }}}
[docs]
class Container(ContainerBase): # {{{
'''
A container represents an open e-book as a folder full of files and an
OPF file. There are two important concepts:
* The root folder. This is the base of the e-book. All the e-books
files are inside this folder or in its sub-folders.
* Names: These are paths to the books' files relative to the root
folder. They always contain POSIX separators and are unquoted. They
can be thought of as canonical identifiers for files in the book.
Most methods on the container object work with names. Names are always
in the NFC Unicode normal form.
* Clones: the container object supports efficient on-disk cloning, which is used to
implement checkpoints in the e-book editor. In order to make this work, you should
never access files on the filesystem directly. Instead, use :meth:`raw_data` or
:meth:`open` to read/write to component files in the book.
When converting between hrefs and names use the methods provided by this
class, they assume all hrefs are quoted.
'''
#: The type of book (epub for EPUB files and azw3 for AZW3 files)
book_type = 'oeb'
#: If this container represents an unzipped book (a directory)
is_dir = False
SUPPORTS_TITLEPAGES = True
SUPPORTS_FILENAMES = True
@property
def book_type_for_display(self):
return self.book_type.upper()
def __init__(self, rootpath, opfpath, log, clone_data=None):
ContainerBase.__init__(self, log)
self.root = clone_data['root'] if clone_data is not None else os.path.abspath(rootpath)
self.name_path_map = {}
self.dirtied = set()
self.pretty_print = set()
self.cloned = False
self.cache_names = ('parsed_cache', 'mime_map', 'name_path_map', 'encoding_map', 'dirtied', 'pretty_print')
self.href_to_name_cache = {}
if clone_data is not None:
self.cloned = True
for x in ('name_path_map', 'opf_name', 'mime_map', 'pretty_print', 'encoding_map', 'tweak_mode'):
setattr(self, x, clone_data[x])
self.opf_dir = os.path.dirname(self.name_path_map[self.opf_name])
return
# Map of relative paths with '/' separators from root of unzipped ePub
# to absolute paths on filesystem with os-specific separators
opfpath = os.path.abspath(os.path.realpath(opfpath))
all_opf_files = []
for dirpath, _dirnames, filenames in os.walk(self.root):
for f in filenames:
path = join(dirpath, f)
name = self.abspath_to_name(path)
self.name_path_map[name] = path
self.mime_map[name] = guess_type(path)
# Special case if we have stumbled onto the opf
if path == opfpath:
self.opf_name = name
self.opf_dir = os.path.dirname(path)
self.mime_map[name] = guess_type('a.opf')
if path.lower().endswith('.opf'):
all_opf_files.append((name, os.path.dirname(path)))
if not hasattr(self, 'opf_name') and all_opf_files:
self.opf_name, self.opf_dir = all_opf_files[0]
self.mime_map[self.opf_name] = guess_type('a.opf')
if not hasattr(self, 'opf_name'):
raise InvalidBook('Could not locate opf file: %r'%opfpath)
# Update mime map with data from the OPF
self.refresh_mime_map()
def refresh_mime_map(self):
for item in self.opf_xpath('//opf:manifest/opf:item[@href and @media-type]'):
href = item.get('href')
try:
name = self.href_to_name(href, self.opf_name)
except ValueError:
continue # special filenames such as CON on windows cause relpath to fail
mt = item.get('media-type')
if name in self.mime_map and name != self.opf_name and mt:
# some epubs include the opf in the manifest with an incorrect mime type
self.mime_map[name] = mt
def data_for_clone(self, dest_dir=None):
dest_dir = dest_dir or self.root
return {
'root': dest_dir,
'opf_name': self.opf_name,
'mime_map': self.mime_map.copy(),
'pretty_print': set(self.pretty_print),
'encoding_map': self.encoding_map.copy(),
'tweak_mode': self.tweak_mode,
'name_path_map': {
name:os.path.join(dest_dir, os.path.relpath(path, self.root))
for name, path in iteritems(self.name_path_map)}
}
def clone_data(self, dest_dir):
Container.commit(self, keep_parsed=False)
self.cloned = True
clone_dir(self.root, dest_dir)
return self.data_for_clone(dest_dir)
[docs]
def add_name_to_manifest(self, name, process_manifest_item=None):
' Add an entry to the manifest for a file with the specified name. Returns the manifest id. '
all_ids = {x.get('id') for x in self.opf_xpath('//*[@id]')}
c = 0
item_id = 'id'
while item_id in all_ids:
c += 1
item_id = 'id' + '%d'%c
manifest = self.opf_xpath('//opf:manifest')[0]
href = self.name_to_href(name, self.opf_name)
item = manifest.makeelement(OPF('item'),
id=item_id, href=href)
item.set('media-type', self.mime_map[name])
self.insert_into_xml(manifest, item)
if process_manifest_item is not None:
process_manifest_item(item)
self.dirty(self.opf_name)
return item_id
[docs]
def manifest_has_name(self, name):
''' Return True if the manifest has an entry corresponding to name '''
all_names = {self.href_to_name(x.get('href'), self.opf_name) for x in self.opf_xpath('//opf:manifest/opf:item[@href]')}
return name in all_names
[docs]
def make_name_unique(self, name):
''' Ensure that `name` does not already exist in this book. If it does, return a modified version that does not exist. '''
counter = count()
while self.has_name_case_insensitive(name) or self.manifest_has_name(name):
c = next(counter) + 1
base, ext = name.rpartition('.')[::2]
if c > 1:
base = base.rpartition('-')[0]
name = '%s-%d.%s' % (base, c, ext)
return name
[docs]
def add_file(self, name, data, media_type=None, spine_index=None, modify_name_if_needed=False, process_manifest_item=None):
''' Add a file to this container. Entries for the file are
automatically created in the OPF manifest and spine
(if the file is a text document) '''
if '..' in name:
raise ValueError('Names are not allowed to have .. in them')
href = self.name_to_href(name, self.opf_name)
if self.has_name_case_insensitive(name) or self.manifest_has_name(name):
if not modify_name_if_needed:
raise ValueError(('A file with the name %s already exists' % name) if self.has_name_case_insensitive(name) else
('An item with the href %s already exists in the manifest' % href))
name = self.make_name_unique(name)
href = self.name_to_href(name, self.opf_name)
path = self.name_to_abspath(name)
base = os.path.dirname(path)
if not os.path.exists(base):
os.makedirs(base)
with open(path, 'wb') as f:
if hasattr(data, 'read'):
shutil.copyfileobj(data, f)
else:
f.write(data)
mt = media_type or self.guess_type(name)
self.name_path_map[name] = path
self.mime_map[name] = mt
if self.ok_to_be_unmanifested(name):
return name
item_id = self.add_name_to_manifest(name, process_manifest_item=process_manifest_item)
if mt in OEB_DOCS:
manifest = self.opf_xpath('//opf:manifest')[0]
spine = self.opf_xpath('//opf:spine')[0]
si = manifest.makeelement(OPF('itemref'), idref=item_id)
self.insert_into_xml(spine, si, index=spine_index)
return name
[docs]
def rename(self, current_name, new_name):
''' Renames a file from current_name to new_name. It automatically
rebases all links inside the file if the folder the file is in
changes. Note however, that links are not updated in the other files
that could reference this file. This is for performance, such updates
should be done once, in bulk. '''
if current_name in self.names_that_must_not_be_changed:
raise ValueError('Renaming of %s is not allowed' % current_name)
if self.exists(new_name) and (new_name == current_name or new_name.lower() != current_name.lower()):
# The destination exists and does not differ from the current name only by case
raise ValueError(f'Cannot rename {current_name} to {new_name} as {new_name} already exists')
new_path = self.name_to_abspath(new_name)
base = os.path.dirname(new_path)
if os.path.isfile(base):
raise ValueError(f'Cannot rename {current_name} to {new_name} as {base} is a file')
if not os.path.exists(base):
os.makedirs(base)
old_path = parent_dir = self.name_to_abspath(current_name)
self.commit_item(current_name)
os.rename(old_path, new_path)
# Remove empty directories
while parent_dir:
parent_dir = os.path.dirname(parent_dir)
try:
os.rmdir(parent_dir)
except OSError:
break
for x in ('mime_map', 'encoding_map'):
x = getattr(self, x)
if current_name in x:
x[new_name] = x[current_name]
self.name_path_map[new_name] = new_path
for x in self.cache_names:
x = getattr(self, x)
try:
x.pop(current_name, None)
except TypeError:
x.discard(current_name)
if current_name == self.opf_name:
self.opf_name = new_name
if os.path.dirname(old_path) != os.path.dirname(new_path):
from calibre.ebooks.oeb.polish.replace import LinkRebaser
repl = LinkRebaser(self, current_name, new_name)
self.replace_links(new_name, repl)
self.dirty(new_name)
[docs]
def replace_links(self, name, replace_func):
''' Replace all links in name using replace_func, which must be a
callable that accepts a URL and returns the replaced URL. It must also
have a 'replaced' attribute that is set to True if any actual
replacement is done. Convenient ways of creating such callables are
using the :class:`LinkReplacer` and :class:`LinkRebaser` classes. '''
media_type = self.mime_map.get(name, guess_type(name))
if name == self.opf_name:
replace_func.file_type = 'opf'
for elem in self.opf_xpath('//*[@href]'):
elem.set('href', replace_func(elem.get('href')))
elif media_type.lower() in OEB_DOCS:
replace_func.file_type = 'text'
rewrite_links(self.parsed(name), replace_func)
elif media_type.lower() in OEB_STYLES:
replace_func.file_type = 'style'
replaceUrls(self.parsed(name), replace_func)
elif media_type.lower() == guess_type('toc.ncx'):
replace_func.file_type = 'ncx'
for elem in self.parsed(name).xpath('//*[@src]'):
elem.set('src', replace_func(elem.get('src')))
if replace_func.replaced:
self.dirty(name)
return replace_func.replaced
[docs]
def iterlinks(self, name, get_line_numbers=True):
''' Iterate over all links in name. If get_line_numbers is True the
yields results of the form (link, line_number, offset). Where
line_number is the line_number at which the link occurs and offset is
the number of characters from the start of the line. Note that offset
could actually encompass several lines if not zero. '''
media_type = self.mime_map.get(name, guess_type(name))
if name == self.opf_name:
for elem in self.opf_xpath('//*[@href]'):
yield (elem.get('href'), elem.sourceline, 0) if get_line_numbers else elem.get('href')
elif media_type.lower() in OEB_DOCS:
for el, attr, link, pos in iterlinks(self.parsed(name)):
yield (link, el.sourceline, pos) if get_line_numbers else link
elif media_type.lower() in OEB_STYLES:
if get_line_numbers:
with self.open(name, 'rb') as f:
raw = self.decode(f.read()).replace('\r\n', '\n').replace('\r', '\n')
position = PositionFinder(raw)
is_in_comment = CommentFinder(raw)
for link, offset in itercsslinks(raw):
if not is_in_comment(offset):
lnum, col = position(offset)
yield link, lnum, col
else:
for link in getUrls(self.parsed(name)):
yield link
elif media_type.lower() == guess_type('toc.ncx'):
for elem in self.parsed(name).xpath('//*[@src]'):
yield (elem.get('src'), elem.sourceline, 0) if get_line_numbers else elem.get('src')
[docs]
def abspath_to_name(self, fullpath, root=None):
'''
Convert an absolute path to a canonical name relative to :attr:`root`
:param root: The base folder. By default the root for this container object is used.
'''
# OS X silently changes all file names to NFD form. The EPUB
# spec requires all text including filenames to be in NFC form.
# The proper fix is to implement a VFS that maps between
# canonical names and their file system representation, however,
# I dont have the time for that now. Note that the container
# ensures that all text files are normalized to NFC when
# decoding them anyway, so there should be no mismatch between
# names in the text and NFC canonical file names.
return unicodedata.normalize('NFC', abspath_to_name(fullpath, root or self.root))
[docs]
def name_to_abspath(self, name):
' Convert a canonical name to an absolute OS dependent path '
return name_to_abspath(name, self.root)
[docs]
def exists(self, name):
''' True iff a file/folder corresponding to the canonical name exists. Note
that this function suffers from the limitations of the underlying OS
filesystem, in particular case (in)sensitivity. So on a case
insensitive filesystem this will return True even if the case of name
is different from the case of the underlying filesystem file. See also :meth:`has_name`'''
return os.path.exists(self.name_to_abspath(name))
[docs]
def href_to_name(self, href, base=None):
'''
Convert an href (relative to base) to a name. base must be a name or
None, in which case self.root is used.
'''
key = href, base
ans = self.href_to_name_cache.get(key, null)
if ans is null:
ans = self.href_to_name_cache[key] = href_to_name(href, self.root, base=base)
return ans
[docs]
def name_to_href(self, name, base=None):
'''Convert a name to a href relative to base, which must be a name or
None in which case self.root is used as the base'''
return name_to_href(name, self.root, base=base)
[docs]
def opf_xpath(self, expr):
' Convenience method to evaluate an XPath expression on the OPF file, has the opf: and dc: namespace prefixes pre-defined. '
return self.opf.xpath(expr, namespaces=OPF_NAMESPACES)
[docs]
def has_name(self, name):
''' Return True iff a file with the same canonical name as that specified exists. Unlike :meth:`exists` this method is always case-sensitive. '''
return name and name in self.name_path_map
def has_name_and_is_not_empty(self, name):
if not self.has_name(name):
return False
try:
return os.path.getsize(self.name_path_map[name]) > 0
except OSError:
return False
def has_name_case_insensitive(self, name):
if not name:
return False
name = name.lower()
for q in self.name_path_map:
if q.lower() == name:
return True
return False
[docs]
def relpath(self, path, base=None):
'''Convert an absolute path (with os separators) to a path relative to
base (defaults to self.root). The relative path is *not* a name. Use
:meth:`abspath_to_name` for that.'''
return relpath(path, base or self.root)
def ok_to_be_unmanifested(self, name):
return name in self.names_that_need_not_be_manifested
@property
def names_that_need_not_be_manifested(self):
' Set of names that are allowed to be missing from the manifest. Depends on the e-book file format. '
return {self.opf_name}
@property
def names_that_must_not_be_removed(self):
' Set of names that must never be deleted from the container. Depends on the e-book file format. '
return {self.opf_name}
@property
def names_that_must_not_be_changed(self):
' Set of names that must never be renamed. Depends on the e-book file format. '
return set()
def parse(self, path, mime):
with open(path, 'rb') as src:
data = src.read()
if mime in OEB_DOCS:
data = self.parse_xhtml(data, self.relpath(path))
elif mime[-4:] in {'+xml', '/xml'}:
data = self.parse_xml(data)
elif mime in OEB_STYLES:
data = self.parse_css(data, self.relpath(path))
return data
[docs]
def raw_data(self, name, decode=True, normalize_to_nfc=True):
'''
Return the raw data corresponding to the file specified by name
:param decode: If True and the file has a text based MIME type, decode it and return a unicode object instead of raw bytes.
:param normalize_to_nfc: If True the returned unicode object is normalized to the NFC normal form as is required for the EPUB and AZW3 file formats.
'''
with self.open(name) as nf:
ans = nf.read()
mime = self.mime_map.get(name, guess_type(name))
if decode and (mime in OEB_STYLES or mime in OEB_DOCS or mime == 'text/plain' or mime[-4:] in {'+xml', '/xml'}):
ans = self.decode(ans, normalize_to_nfc=normalize_to_nfc)
return ans
[docs]
def parsed(self, name):
''' Return a parsed representation of the file specified by name. For
HTML and XML files an lxml tree is returned. For CSS files a css_parser
stylesheet is returned. Note that parsed objects are cached for
performance. If you make any changes to the parsed object, you must
call :meth:`dirty` so that the container knows to update the cache. See also :meth:`replace`.'''
ans = self.parsed_cache.get(name, None)
if ans is None:
self.used_encoding = None
mime = self.mime_map.get(name, guess_type(name))
ans = self.parse(self.name_path_map[name], mime)
self.parsed_cache[name] = ans
self.encoding_map[name] = self.used_encoding
return ans
[docs]
def replace(self, name, obj):
'''
Replace the parsed object corresponding to name with obj, which must be
a similar object, i.e. an lxml tree for HTML/XML or a css_parser
stylesheet for a CSS file.
'''
self.parsed_cache[name] = obj
self.dirty(name)
@property
def opf(self):
' The parsed OPF file '
return self.parsed(self.opf_name)
@property
def mi(self):
''' The metadata of this book as a Metadata object. Note that this
object is constructed on the fly every time this property is requested,
so use it sparingly. '''
from calibre.ebooks.metadata.opf2 import OPF as O
mi = self.serialize_item(self.opf_name)
return O(BytesIO(mi), basedir=self.opf_dir, unquote_urls=False,
populate_spine=False).to_book_metadata()
@property
def opf_version(self):
' The version set on the OPF\'s <package> element '
try:
return self.opf_xpath('//opf:package/@version')[0]
except IndexError:
return ''
@property
def opf_version_parsed(self):
' The version set on the OPF\'s <package> element as a tuple of integers '
return parse_opf_version(self.opf_version)
@property
def manifest_items(self):
return self.opf_xpath('//opf:manifest/opf:item[@href and @id]')
@property
def manifest_id_map(self):
' Mapping of manifest id to canonical names '
return {item.get('id'):self.href_to_name(item.get('href'), self.opf_name) for item in self.manifest_items}
@property
def manifest_type_map(self):
' Mapping of manifest media-type to list of canonical names of that media-type '
ans = defaultdict(list)
for item in self.opf_xpath('//opf:manifest/opf:item[@href and @media-type]'):
ans[item.get('media-type').lower()].append(self.href_to_name(
item.get('href'), self.opf_name))
return {mt:tuple(v) for mt, v in iteritems(ans)}
[docs]
def manifest_items_with_property(self, property_name):
' All manifest items that have the specified property '
prefixes = read_prefixes(self.opf)
for item in items_with_property(self.opf, property_name, prefixes):
href = item.get('href')
if href:
yield self.href_to_name(item.get('href'), self.opf_name)
[docs]
def manifest_items_of_type(self, predicate):
''' The names of all manifest items whose media-type matches predicate.
`predicate` can be a set, a list, a string or a function taking a single
argument, which will be called with the media-type. '''
if isinstance(predicate, str):
predicate = predicate.__eq__
elif hasattr(predicate, '__contains__'):
predicate = predicate.__contains__
for mt, names in iteritems(self.manifest_type_map):
if predicate(mt):
yield from names
[docs]
def apply_unique_properties(self, name, *properties):
''' Ensure that the specified properties are set on only the manifest item
identified by name. You can pass None as the name to remove the
property from all items. '''
properties = frozenset(properties)
removed_names, added_names = [], []
for p in properties:
if p.startswith('calibre:'):
ensure_prefix(self.opf, None, 'calibre', CALIBRE_PREFIX)
break
for item in self.opf_xpath('//opf:manifest/opf:item'):
iname = self.href_to_name(item.get('href'), self.opf_name)
props = (item.get('properties') or '').split()
lprops = {p.lower() for p in props}
for prop in properties:
if prop.lower() in lprops:
if name != iname:
removed_names.append(iname)
props = [p for p in props if p.lower() != prop]
if props:
item.set('properties', ' '.join(props))
else:
del item.attrib['properties']
else:
if name == iname:
added_names.append(iname)
props.append(prop)
item.set('properties', ' '.join(props))
self.dirty(self.opf_name)
return removed_names, added_names
[docs]
def add_properties(self, name, *properties):
''' Add the specified properties to the manifest item identified by name. '''
properties = frozenset(properties)
if not properties:
return True
for p in properties:
if p.startswith('calibre:'):
ensure_prefix(self.opf, None, 'calibre', CALIBRE_PREFIX)
break
for item in self.opf_xpath('//opf:manifest/opf:item'):
iname = self.href_to_name(item.get('href'), self.opf_name)
if name == iname:
props = frozenset((item.get('properties') or '').split()) | properties
item.set('properties', ' '.join(props))
return True
return False
@property
def guide_type_map(self):
' Mapping of guide type to canonical name '
return {item.get('type', ''):self.href_to_name(item.get('href'), self.opf_name)
for item in self.opf_xpath('//opf:guide/opf:reference[@href and @type]')}
@property
def spine_iter(self):
''' An iterator that yields item, name is_linear for every item in the
books' spine. item is the lxml element, name is the canonical file name
and is_linear is True if the item is linear. See also: :attr:`spine_names` and :attr:`spine_items`. '''
manifest_id_map = self.manifest_id_map
non_linear = []
for item in self.opf_xpath('//opf:spine/opf:itemref[@idref]'):
idref = item.get('idref')
name = manifest_id_map.get(idref, None)
path = self.name_path_map.get(name, None)
if path:
if item.get('linear', 'yes') == 'yes':
yield item, name, True
else:
non_linear.append((item, name))
for item, name in non_linear:
yield item, name, False
def index_in_spine(self, name):
manifest_id_map = self.manifest_id_map
for i, item in enumerate(self.opf_xpath('//opf:spine/opf:itemref[@idref]')):
idref = item.get('idref')
q = manifest_id_map.get(idref, None)
if q == name:
return i
@property
def spine_names(self):
''' An iterator yielding name and is_linear for every item in the
books' spine. See also: :attr:`spine_iter` and :attr:`spine_items`. '''
for item, name, linear in self.spine_iter:
yield name, linear
@property
def spine_items(self):
''' An iterator yielding the path for every item in the
books' spine. See also: :attr:`spine_iter` and :attr:`spine_items`. '''
for name, linear in self.spine_names:
yield self.name_path_map[name]
[docs]
def remove_from_spine(self, spine_items, remove_if_no_longer_in_spine=True):
'''
Remove the specified items (by canonical name) from the spine. If ``remove_if_no_longer_in_spine``
is True, the items are also deleted from the book, not just from the spine.
'''
nixed = set()
for (name, remove), (item, xname, linear) in zip(spine_items, self.spine_iter):
if remove and name == xname:
self.remove_from_xml(item)
nixed.add(name)
if remove_if_no_longer_in_spine:
# Remove from the book if no longer in spine
nixed -= {name for name, linear in self.spine_names}
for name in nixed:
self.remove_item(name)
[docs]
def set_spine(self, spine_items):
''' Set the spine to be spine_items where spine_items is an iterable of
the form (name, linear). Will raise an error if one of the names is not
present in the manifest. '''
imap = self.manifest_id_map
imap = {name:item_id for item_id, name in iteritems(imap)}
items = [item for item, name, linear in self.spine_iter]
tail, last_tail = (items[0].tail, items[-1].tail) if items else ('\n ', '\n ')
for i in items:
self.remove_from_xml(i)
spine = self.opf_xpath('//opf:spine')[0]
spine.text = tail
for name, linear in spine_items:
i = spine.makeelement('{%s}itemref' % OPF_NAMESPACES['opf'], nsmap={'opf':OPF_NAMESPACES['opf']})
i.tail = tail
i.set('idref', imap[name])
spine.append(i)
if not linear:
i.set('linear', 'no')
if len(spine) > 0:
spine[-1].tail = last_tail
self.dirty(self.opf_name)
[docs]
def remove_item(self, name, remove_from_guide=True):
'''
Remove the item identified by name from this container. This removes all
references to the item in the OPF manifest, guide and spine as well as from
any internal caches.
'''
removed = set()
for elem in self.opf_xpath('//opf:manifest/opf:item[@href]'):
if self.href_to_name(elem.get('href'), self.opf_name) == name:
id_ = elem.get('id', None)
if id_ is not None:
removed.add(id_)
self.remove_from_xml(elem)
self.dirty(self.opf_name)
if removed:
for spine in self.opf_xpath('//opf:spine'):
tocref = spine.attrib.get('toc', None)
if tocref and tocref in removed:
spine.attrib.pop('toc', None)
self.dirty(self.opf_name)
for item in self.opf_xpath('//opf:spine/opf:itemref[@idref]'):
idref = item.get('idref')
if idref in removed:
self.remove_from_xml(item)
self.dirty(self.opf_name)
for meta in self.opf_xpath('//opf:meta[@name="cover" and @content]'):
if meta.get('content') in removed:
self.remove_from_xml(meta)
self.dirty(self.opf_name)
for meta in self.opf_xpath('//opf:meta[@refines]'):
q = meta.get('refines')
if q.startswith('#') and q[1:] in removed:
self.remove_from_xml(meta)
self.dirty(self.opf_name)
if remove_from_guide:
for item in self.opf_xpath('//opf:guide/opf:reference[@href]'):
if self.href_to_name(item.get('href'), self.opf_name) == name:
self.remove_from_xml(item)
self.dirty(self.opf_name)
path = self.name_path_map.pop(name, None)
if path and os.path.exists(path):
os.remove(path)
self.mime_map.pop(name, None)
self.parsed_cache.pop(name, None)
self.dirtied.discard(name)
def set_media_overlay_durations(self, duration_map=None):
self.dirty(self.opf_name)
for meta in self.opf_xpath('//opf:meta[@property="media:duration"]'):
self.remove_from_xml(meta)
metadata = self.opf_xpath('//opf:metadata')[0]
total_duration = 0
for item_id, duration in (duration_map or {}).items():
meta = metadata.makeelement(OPF('meta'), property="media:duration", refines="#" + item_id)
meta.text = seconds_to_timestamp(duration)
self.insert_into_xml(metadata, meta)
total_duration += duration
if duration_map:
meta = metadata.makeelement(OPF('meta'), property="media:duration")
meta.text = seconds_to_timestamp(total_duration)
self.insert_into_xml(metadata, meta)
[docs]
def dirty(self, name):
''' Mark the parsed object corresponding to name as dirty. See also: :meth:`parsed`. '''
self.dirtied.add(name)
[docs]
def remove_from_xml(self, item):
'Removes item from parent, fixing indentation (works only with self closing items)'
parent = item.getparent()
idx = parent.index(item)
if idx == 0:
# We are removing the first item - only care about adjusting
# the tail if this was the only child
if len(parent) == 1:
parent.text = item.tail
else:
# Make sure the preceding item has this tail
parent[idx-1].tail = item.tail
parent.remove(item)
return item
[docs]
def insert_into_xml(self, parent, item, index=None):
'''Insert item into parent (or append if index is None), fixing
indentation. Only works with self closing items.'''
if index is None:
parent.append(item)
else:
parent.insert(index, item)
idx = parent.index(item)
if idx == 0:
item.tail = parent.text
# If this is the only child of this parent element, we need a
# little extra work as we have gone from a self-closing <foo />
# element to <foo><item /></foo>
if len(parent) == 1:
sibling = parent.getprevious()
if sibling is None:
# Give up!
return
parent.text = sibling.text
item.tail = sibling.tail
else:
item.tail = parent[idx-1].tail
if idx == len(parent)-1:
parent[idx-1].tail = parent.text
[docs]
def opf_get_or_create(self, name):
''' Convenience method to either return the first XML element with the
specified name or create it under the opf:package element and then
return it, if it does not already exist. '''
ans = self.opf_xpath('//opf:'+name)
if ans:
return ans[0]
self.dirty(self.opf_name)
package = self.opf_xpath('//opf:package')[0]
item = package.makeelement(OPF(name))
item.tail = '\n'
package.append(item)
return item
[docs]
def generate_item(self, name, id_prefix=None, media_type=None, unique_href=True):
'''Add an item to the manifest with href derived from the given
name. Ensures uniqueness of href and id automatically. Returns
generated item.'''
id_prefix = id_prefix or 'id'
media_type = media_type or self.guess_type(name)
if unique_href:
name = self.make_name_unique(name)
href = self.name_to_href(name, self.opf_name)
base, ext = href.rpartition('.')[0::2]
all_ids = {x.get('id') for x in self.opf_xpath('//*[@id]')}
if id_prefix.endswith('-'):
all_ids.add(id_prefix)
c = 0
item_id = id_prefix
while item_id in all_ids:
c += 1
item_id = f'{id_prefix}{c}'
manifest = self.opf_xpath('//opf:manifest')[0]
item = manifest.makeelement(OPF('item'),
id=item_id, href=href)
item.set('media-type', media_type)
self.insert_into_xml(manifest, item)
self.dirty(self.opf_name)
name = self.href_to_name(href, self.opf_name)
self.name_path_map[name] = path = self.name_to_abspath(name)
self.mime_map[name] = media_type
# Ensure that the file corresponding to the newly created item exists
# otherwise cloned containers will fail when they try to get the number
# of links to the file
base = os.path.dirname(path)
if not os.path.exists(base):
os.makedirs(base)
open(path, 'wb').close()
return item
def format_opf(self):
try:
mdata = self.opf_xpath('//opf:metadata')[0]
except IndexError:
pass
else:
mdata.text = '\n '
remove = set()
for child in mdata:
child.tail = '\n '
try:
if (child.get('name', '').startswith('calibre:'
) and child.get('content', '').strip() in {'{}', ''}):
remove.add(child)
except AttributeError:
continue # Happens for XML comments
for child in remove:
mdata.remove(child)
if len(mdata) > 0:
mdata[-1].tail = '\n '
# Ensure name comes before content, needed for Nooks
for meta in self.opf_xpath('//opf:meta[@name="cover"]'):
if 'content' in meta.attrib:
meta.set('content', meta.attrib.pop('content'))
[docs]
def serialize_item(self, name):
''' Convert a parsed object (identified by canonical name) into a bytestring. See :meth:`parsed`. '''
data = root = self.parsed(name)
if name == self.opf_name:
self.format_opf()
data = serialize(data, self.mime_map[name], pretty_print=name in
self.pretty_print)
if name == self.opf_name and root.nsmap.get(None) == OPF2_NS:
# Needed as I can't get lxml to output opf:role and
# not output <opf:metadata> as well
data = re.sub(br'(<[/]{0,1})opf:', br'\1', data)
return data
[docs]
def commit_item(self, name, keep_parsed=False):
''' Commit a parsed object to disk (it is serialized and written to the
underlying file). If ``keep_parsed`` is True the parsed representation
is retained in the cache. See also: :meth:`parsed` '''
if name not in self.parsed_cache:
return
data = self.serialize_item(name)
self.dirtied.discard(name)
if not keep_parsed:
self.parsed_cache.pop(name)
dest = self.name_path_map[name]
if self.cloned and nlinks_file(dest) > 1:
# Decouple this file from its links
os.unlink(dest)
with open(dest, 'wb') as f:
f.write(data)
[docs]
def filesize(self, name):
''' Return the size in bytes of the file represented by the specified
canonical name. Automatically handles dirtied parsed objects. See also:
:meth:`parsed` '''
if name in self.dirtied:
self.commit_item(name, keep_parsed=True)
path = self.name_to_abspath(name)
return os.path.getsize(path)
[docs]
def get_file_path_for_processing(self, name, allow_modification=True):
''' Similar to open() except that it returns a file path, instead of an open file object. '''
if name in self.dirtied:
self.commit_item(name)
self.parsed_cache.pop(name, False)
path = self.name_to_abspath(name)
base = os.path.dirname(path)
if not os.path.exists(base):
os.makedirs(base)
else:
if self.cloned and allow_modification and os.path.exists(path) and nlinks_file(path) > 1:
# Decouple this file from its links
temp = path + 'xxx'
shutil.copyfile(path, temp)
if iswindows:
retry_on_fail(os.unlink, path)
else:
os.unlink(path)
os.rename(temp, path)
return path
[docs]
def open(self, name, mode='rb'):
''' Open the file pointed to by name for direct read/write. Note that
this will commit the file if it is dirtied and remove it from the parse
cache. You must finish with this file before accessing the parsed
version of it again, or bad things will happen. '''
return open(self.get_file_path_for_processing(name, mode not in {'r', 'rb'}), mode)
[docs]
def commit(self, outpath=None, keep_parsed=False):
'''
Commit all dirtied parsed objects to the filesystem and write out the e-book file at outpath.
:param output: The path to write the saved e-book file to. If None, the path of the original book file is used.
:param keep_parsed: If True the parsed representations of committed items are kept in the cache.
'''
for name in tuple(self.dirtied):
self.commit_item(name, keep_parsed=keep_parsed)
def compare_to(self, other):
if set(self.name_path_map) != set(other.name_path_map):
return 'Set of files is not the same'
mismatches = []
for name, path in iteritems(self.name_path_map):
opath = other.name_path_map[name]
with open(path, 'rb') as f1, open(opath, 'rb') as f2:
if f1.read() != f2.read():
mismatches.append('The file %s is not the same'%name)
return '\n'.join(mismatches)
# }}}
# EPUB {{{
class InvalidEpub(InvalidBook):
pass
class ObfuscationKeyMissing(InvalidEpub):
pass
OCF_NS = 'urn:oasis:names:tc:opendocument:xmlns:container'
VCS_IGNORE_FILES = frozenset('.gitignore .hgignore .agignore .bzrignore'.split())
VCS_DIRS = frozenset(('.git', '.hg', '.svn', '.bzr'))
def walk_dir(basedir):
for dirpath, dirnames, filenames in os.walk(basedir):
for vcsdir in VCS_DIRS:
try:
dirnames.remove(vcsdir)
except Exception:
pass
is_root = os.path.abspath(os.path.normcase(dirpath)) == os.path.abspath(os.path.normcase(basedir))
yield is_root, dirpath, None
for fname in filenames:
if fname not in VCS_IGNORE_FILES:
yield is_root, dirpath, fname
class EpubContainer(Container):
book_type = 'epub'
@property
def book_type_for_display(self):
ans = self.book_type.upper()
try:
v = self.opf_version_parsed
except Exception:
pass
else:
try:
if v.major == 2:
ans += ' 2'
else:
if not v.minor:
ans += f' {v.major}'
else:
ans += f' {v.major}.{v.minor}'
except Exception:
pass
return ans
META_INF = {
'container.xml': True,
'manifest.xml': False,
'encryption.xml': False,
'metadata.xml': False,
'signatures.xml': False,
'rights.xml': False,
}
def __init__(self, pathtoepub, log, clone_data=None, tdir=None):
if clone_data is not None:
super().__init__(None, None, log, clone_data=clone_data)
for x in ('pathtoepub', 'obfuscated_fonts', 'is_dir'):
setattr(self, x, clone_data[x])
return
self.pathtoepub = pathtoepub
if tdir is None:
tdir = PersistentTemporaryDirectory('_epub_container')
tdir = os.path.abspath(os.path.realpath(tdir))
self.root = tdir
self.is_dir = os.path.isdir(pathtoepub)
if self.is_dir:
for is_root, dirpath, fname in walk_dir(self.pathtoepub):
if is_root:
base = tdir
else:
base = os.path.join(tdir, os.path.relpath(dirpath, self.pathtoepub))
if fname is None:
os.mkdir(base)
if fname is not None:
shutil.copy(os.path.join(dirpath, fname), os.path.join(base, fname))
else:
with open(self.pathtoepub, 'rb') as stream:
try:
zf = ZipFile(stream)
zf.extractall(tdir)
except:
log.exception('EPUB appears to be invalid ZIP file, trying a'
' more forgiving ZIP parser')
from calibre.utils.localunzip import extractall
stream.seek(0)
extractall(stream, path=tdir)
try:
os.remove(join(tdir, 'mimetype'))
except OSError:
pass
# Ensure all filenames are in NFC normalized form
# has no effect on HFS+ filesystems as they always store filenames
# in NFD form
for filename in walk(self.root):
n = unicodedata.normalize('NFC', filename)
if n != filename:
s = filename + 'suff1x'
os.rename(filename, s)
os.rename(s, n)
container_path = join(self.root, 'META-INF', 'container.xml')
if not exists(container_path):
raise InvalidEpub('No META-INF/container.xml in epub')
with open(container_path, 'rb') as cf:
container = safe_xml_fromstring(cf.read())
opf_files = container.xpath((
r'child::ocf:rootfiles/ocf:rootfile'
'[@media-type="%s" and @full-path]'%guess_type('a.opf')
), namespaces={'ocf':OCF_NS}
)
if not opf_files:
raise InvalidEpub('META-INF/container.xml contains no link to OPF file')
opf_path = os.path.join(self.root, *(urlunquote(opf_files[0].get('full-path')).split('/')))
if not exists(opf_path):
raise InvalidEpub('OPF file does not exist at location pointed to'
' by META-INF/container.xml')
super().__init__(tdir, opf_path, log)
self.obfuscated_fonts = {}
if 'META-INF/encryption.xml' in self.name_path_map:
self.process_encryption()
self.parsed_cache['META-INF/container.xml'] = container
def clone_data(self, dest_dir):
ans = super().clone_data(dest_dir)
ans['pathtoepub'] = self.pathtoepub
ans['obfuscated_fonts'] = self.obfuscated_fonts.copy()
ans['is_dir'] = self.is_dir
return ans
def rename(self, old_name, new_name):
is_opf = old_name == self.opf_name
super().rename(old_name, new_name)
if is_opf:
for elem in self.parsed('META-INF/container.xml').xpath((
r'child::ocf:rootfiles/ocf:rootfile'
'[@media-type="%s" and @full-path]'%guess_type('a.opf')
), namespaces={'ocf':OCF_NS}
):
# The asinine epubcheck cannot handle quoted filenames in
# container.xml
elem.set('full-path', self.opf_name)
self.dirty('META-INF/container.xml')
if old_name in self.obfuscated_fonts:
self.obfuscated_fonts[new_name] = self.obfuscated_fonts.pop(old_name)
enc = self.parsed('META-INF/encryption.xml')
for cr in enc.xpath('//*[local-name()="CipherReference" and @URI]'):
if self.href_to_name(cr.get('URI')) == old_name:
cr.set('URI', self.name_to_href(new_name))
self.dirty('META-INF/encryption.xml')
@property
def names_that_need_not_be_manifested(self):
return super().names_that_need_not_be_manifested | {'META-INF/' + x for x in self.META_INF}
def ok_to_be_unmanifested(self, name):
return name in self.names_that_need_not_be_manifested or name.startswith('META-INF/')
@property
def names_that_must_not_be_removed(self):
return super().names_that_must_not_be_removed | {'META-INF/container.xml'}
@property
def names_that_must_not_be_changed(self):
return super().names_that_must_not_be_changed | {'META-INF/' + x for x in self.META_INF}
def remove_item(self, name, remove_from_guide=True):
# Handle removal of obfuscated fonts
if name == 'META-INF/encryption.xml':
self.obfuscated_fonts.clear()
if name in self.obfuscated_fonts:
self.obfuscated_fonts.pop(name, None)
enc = self.parsed('META-INF/encryption.xml')
for em in enc.xpath('//*[local-name()="EncryptionMethod" and @Algorithm]'):
alg = em.get('Algorithm')
if alg not in {ADOBE_OBFUSCATION, IDPF_OBFUSCATION}:
continue
try:
cr = em.getparent().xpath('descendant::*[local-name()="CipherReference" and @URI]')[0]
except (IndexError, ValueError, KeyError):
continue
if name == self.href_to_name(cr.get('URI')):
self.remove_from_xml(em.getparent())
self.dirty('META-INF/encryption.xml')
super().remove_item(name, remove_from_guide=remove_from_guide)
def read_raw_unique_identifier(self):
package_id = raw_unique_identifier = idpf_key = None
for attrib, val in iteritems(self.opf.attrib):
if attrib.endswith('unique-identifier'):
package_id = val
break
if package_id is not None:
for elem in self.opf_xpath('//*[@id=%s]'%escape_xpath_attr(package_id)):
if elem.text:
raw_unique_identifier = elem.text
break
if raw_unique_identifier is not None:
idpf_key = raw_unique_identifier
idpf_key = re.sub('[\u0020\u0009\u000d\u000a]', '', idpf_key)
idpf_key = hashlib.sha1(idpf_key.encode('utf-8')).digest()
return package_id, raw_unique_identifier, idpf_key
def iter_encryption_entries(self):
if 'META-INF/encryption.xml' in self.name_path_map:
enc = self.parsed('META-INF/encryption.xml')
for em in enc.xpath('//*[local-name()="EncryptionMethod" and @Algorithm]'):
try:
cr = em.getparent().xpath('descendant::*[local-name()="CipherReference" and @URI]')[0]
except Exception:
cr = None
yield em, cr
def process_encryption(self):
fonts = {}
for em, cr in self.iter_encryption_entries():
alg = em.get('Algorithm')
if alg not in {ADOBE_OBFUSCATION, IDPF_OBFUSCATION}:
raise DRMError()
if cr is None:
continue
name = self.href_to_name(cr.get('URI'))
path = self.name_path_map.get(name, None)
if path is not None:
fonts[name] = alg
package_id, raw_unique_identifier, idpf_key = self.read_raw_unique_identifier()
key = None
for item in self.opf_xpath('//*[local-name()="metadata"]/*'
'[local-name()="identifier"]'):
scheme = None
for xkey in item.attrib.keys():
if xkey.endswith('scheme'):
scheme = item.get(xkey)
if (scheme and scheme.lower() == 'uuid') or \
(item.text and item.text.startswith('urn:uuid:')):
try:
key = item.text.rpartition(':')[-1]
key = uuid.UUID(key).bytes
except Exception:
self.log.exception('Failed to parse obfuscation key')
key = None
for font, alg in iteritems(fonts):
tkey = key if alg == ADOBE_OBFUSCATION else idpf_key
if not tkey:
raise ObfuscationKeyMissing('Failed to find obfuscation key')
raw = self.raw_data(font, decode=False)
raw = decrypt_font_data(tkey, raw, alg)
with self.open(font, 'wb') as f:
f.write(raw)
self.obfuscated_fonts[font] = (alg, tkey)
def update_modified_timestamp(self):
from calibre.ebooks.metadata.opf3 import set_last_modified_in_opf
set_last_modified_in_opf(self.opf)
self.dirty(self.opf_name)
def commit(self, outpath=None, keep_parsed=False):
if self.opf_version_parsed.major == 3:
self.update_modified_timestamp()
super().commit(keep_parsed=keep_parsed)
container_path = join(self.root, 'META-INF', 'container.xml')
if not exists(container_path):
raise InvalidEpub('No META-INF/container.xml in EPUB, this typically happens if the temporary files calibre'
' is using are deleted by some other program while calibre is running')
restore_fonts = {}
for name in self.obfuscated_fonts:
if name not in self.name_path_map:
continue
alg, key = self.obfuscated_fonts[name]
# Decrypting and encrypting are the same operation (XOR with key)
restore_fonts[name] = data = self.raw_data(name, decode=False)
with self.open(name, 'wb') as f:
f.write(decrypt_font_data(key, data, alg))
if outpath is None:
outpath = self.pathtoepub
if self.is_dir:
# First remove items from the source dir that do not exist any more
for is_root, dirpath, fname in walk_dir(self.pathtoepub):
if fname is not None:
if is_root and fname == 'mimetype':
continue
base = self.root if is_root else os.path.join(self.root, os.path.relpath(dirpath, self.pathtoepub))
fpath = os.path.join(base, fname)
if not os.path.exists(fpath):
os.remove(os.path.join(dirpath, fname))
try:
os.rmdir(dirpath)
except OSError as err:
if err.errno != errno.ENOTEMPTY:
raise
# Now copy over everything from root to source dir
for dirpath, dirnames, filenames in os.walk(self.root):
is_root = os.path.abspath(os.path.normcase(dirpath)) == os.path.abspath(os.path.normcase(self.root))
base = self.pathtoepub if is_root else os.path.join(self.pathtoepub, os.path.relpath(dirpath, self.root))
try:
os.mkdir(base)
except OSError as err:
if err.errno != errno.EEXIST:
raise
for fname in filenames:
with open(os.path.join(dirpath, fname), 'rb') as src, open(os.path.join(base, fname), 'wb') as dest:
shutil.copyfileobj(src, dest)
else:
from calibre.ebooks.tweak import zip_rebuilder
with open(join(self.root, 'mimetype'), 'wb') as f:
et = guess_type('a.epub')
if not isinstance(et, bytes):
et = et.encode('ascii')
f.write(et)
zip_rebuilder(self.root, outpath)
for name, data in iteritems(restore_fonts):
with self.open(name, 'wb') as f:
f.write(data)
@property
def path_to_ebook(self):
return self.pathtoepub
@path_to_ebook.setter
def path_to_ebook(self, val):
self.pathtoepub = val
# }}}
# AZW3 {{{
class InvalidMobi(InvalidBook):
pass
def do_explode(path, dest):
from calibre.ebooks.mobi.reader.mobi6 import MobiReader
from calibre.ebooks.mobi.reader.mobi8 import Mobi8Reader
with open(path, 'rb') as stream:
mr = MobiReader(stream, default_log, None, None)
with CurrentDir(dest):
mr = Mobi8Reader(mr, default_log, for_tweak=True)
opf = os.path.abspath(mr())
obfuscated_fonts = mr.encrypted_fonts
return opf, obfuscated_fonts
def opf_to_azw3(opf, outpath, container):
from calibre.ebooks.conversion.plumber import Plumber, create_oebbook
from calibre.ebooks.mobi.tweak import set_cover
class Item(Manifest.Item):
def _parse_css(self, data):
# The default CSS parser used by oeb.base inserts the h namespace
# and resolves all @import rules. We dont want that.
return container.parse_css(data)
def specialize(oeb):
oeb.manifest.Item = Item
plumber = Plumber(opf, outpath, container.log)
plumber.setup_options()
inp = plugin_for_input_format('azw3')
outp = plugin_for_output_format('azw3')
plumber.opts.mobi_passthrough = True
plumber.opts.keep_ligatures = True
oeb = create_oebbook(container.log, opf, plumber.opts, specialize=specialize)
set_cover(oeb)
outp.convert(oeb, outpath, inp, plumber.opts, container.log)
def epub_to_azw3(epub, outpath=None):
container = get_container(epub, tweak_mode=True)
changed = False
for item in container.opf_xpath('//opf:manifest/opf:item[@properties and @href]'):
p = item.get('properties').split()
if 'cover-image' in p:
href = item.get('href')
guides = container.opf_xpath('//opf:guide')
if not guides:
guides = (container.opf.makeelement(OPF('guide')),)
container.opf.append(guides[0])
for guide in guides:
for child in guide:
if child.get('type') == 'cover':
break
else:
guide.append(guide.makeelement(OPF('reference'), type='cover', href=href))
changed = True
break
elif 'calibre:title-page' in p:
item.getparent().remove(item)
if changed:
container.dirty(container.opf_name)
container.commit_item(container.opf_name)
outpath = outpath or (epub.rpartition('.')[0] + '.azw3')
opf_to_azw3(container.name_to_abspath(container.opf_name), outpath, container)
class AZW3Container(Container):
book_type = 'azw3'
SUPPORTS_TITLEPAGES = False
SUPPORTS_FILENAMES = False
def __init__(self, pathtoazw3, log, clone_data=None, tdir=None):
if clone_data is not None:
super().__init__(None, None, log, clone_data=clone_data)
for x in ('pathtoazw3', 'obfuscated_fonts'):
setattr(self, x, clone_data[x])
return
self.pathtoazw3 = pathtoazw3
if tdir is None:
tdir = PersistentTemporaryDirectory('_azw3_container')
tdir = os.path.abspath(os.path.realpath(tdir))
self.root = tdir
with open(pathtoazw3, 'rb') as stream:
raw = stream.read(3)
if raw == b'TPZ':
raise InvalidMobi(_('This is not a MOBI file. It is a Topaz file.'))
try:
header = MetadataHeader(stream, default_log)
except MobiError:
raise InvalidMobi(_('This is not a MOBI file.'))
if header.encryption_type != 0:
raise DRMError()
kf8_type = header.kf8_type
if kf8_type is None:
raise InvalidMobi(_('This MOBI file does not contain a KF8 format '
'book. KF8 is the new format from Amazon. calibre can '
'only edit MOBI files that contain KF8 books. Older '
'MOBI files without KF8 are not editable.'))
if kf8_type == 'joint':
raise InvalidMobi(_('This MOBI file contains both KF8 and '
'older Mobi6 data. calibre can only edit MOBI files '
'that contain only KF8 data.'))
try:
opf_path, obfuscated_fonts = fork_job(
'calibre.ebooks.oeb.polish.container', 'do_explode',
args=(pathtoazw3, tdir), no_output=True)['result']
except WorkerError as e:
log(e.orig_tb)
raise InvalidMobi('Failed to explode MOBI')
super().__init__(tdir, opf_path, log)
self.obfuscated_fonts = {x.replace(os.sep, '/') for x in obfuscated_fonts}
def clone_data(self, dest_dir):
ans = super().clone_data(dest_dir)
ans['pathtoazw3'] = self.pathtoazw3
ans['obfuscated_fonts'] = self.obfuscated_fonts.copy()
return ans
def commit(self, outpath=None, keep_parsed=False):
super().commit(keep_parsed=keep_parsed)
if outpath is None:
outpath = self.pathtoazw3
opf_to_azw3(self.name_path_map[self.opf_name], outpath, self)
@property
def path_to_ebook(self):
return self.pathtoazw3
@path_to_ebook.setter
def path_to_ebook(self, val):
self.pathtoazw3 = val
@property
def names_that_must_not_be_changed(self):
return set(self.name_path_map)
# }}}
def get_container(path, log=None, tdir=None, tweak_mode=False):
if log is None:
log = default_log
try:
isdir = os.path.isdir(path)
except Exception:
isdir = False
own_tdir = not tdir
ebook_cls = (AZW3Container if path.rpartition('.')[-1].lower() in {'azw3', 'mobi', 'original_azw3', 'original_mobi'} and not isdir
else EpubContainer)
if own_tdir:
tdir = PersistentTemporaryDirectory(f'_{ebook_cls.book_type}_container')
try:
ebook = ebook_cls(path, log, tdir=tdir)
ebook.tweak_mode = tweak_mode
except BaseException:
if own_tdir:
shutil.rmtree(tdir, ignore_errors=True)
raise
return ebook
def test_roundtrip():
ebook = get_container(sys.argv[-1])
p = PersistentTemporaryFile(suffix='.'+sys.argv[-1].rpartition('.')[-1])
p.close()
ebook.commit(outpath=p.name)
ebook2 = get_container(p.name)
ebook3 = get_container(p.name)
diff = ebook3.compare_to(ebook2)
if diff is not None:
print(diff)
if __name__ == '__main__':
test_roundtrip()
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