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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# vim:ts=4:sw=4:softtabstop=4:smarttab:expandtab
from __future__ import unicode_literals, division, absolute_import, print_function
from .compatibility_utils import text_type
from . import unipath
from .unipath import pathof
DUMP = False
""" Set to True to dump all possible information. """
import os
import re
# note: re requites the pattern to be the exact same type as the data to be searched in python3
# but u"" is not allowed for the pattern itself only b""
import zipfile
import binascii
from .mobi_utils import mangle_fonts
class unpackException(Exception):
pass
class ZipInfo(zipfile.ZipInfo):
def __init__(self, *args, **kwargs):
if 'compress_type' in kwargs:
compress_type = kwargs.pop('compress_type')
super(ZipInfo, self).__init__(*args, **kwargs)
self.compress_type = compress_type
class fileNames:
def __init__(self, infile, outdir):
self.infile = infile
self.outdir = outdir
if not unipath.exists(self.outdir):
unipath.mkdir(self.outdir)
self.mobi7dir = os.path.join(self.outdir,'mobi7')
if not unipath.exists(self.mobi7dir):
unipath.mkdir(self.mobi7dir)
self.imgdir = os.path.join(self.mobi7dir, 'Images')
if not unipath.exists(self.imgdir):
unipath.mkdir(self.imgdir)
self.hdimgdir = os.path.join(self.outdir,'HDImages')
if not unipath.exists(self.hdimgdir):
unipath.mkdir(self.hdimgdir)
self.outbase = os.path.join(self.outdir, os.path.splitext(os.path.split(infile)[1])[0])
def getInputFileBasename(self):
return os.path.splitext(os.path.basename(self.infile))[0]
def makeK8Struct(self):
self.k8dir = os.path.join(self.outdir,'mobi8')
if not unipath.exists(self.k8dir):
unipath.mkdir(self.k8dir)
self.k8metainf = os.path.join(self.k8dir,'META-INF')
if not unipath.exists(self.k8metainf):
unipath.mkdir(self.k8metainf)
self.k8oebps = os.path.join(self.k8dir,'OEBPS')
if not unipath.exists(self.k8oebps):
unipath.mkdir(self.k8oebps)
self.k8images = os.path.join(self.k8oebps,'Images')
if not unipath.exists(self.k8images):
unipath.mkdir(self.k8images)
self.k8fonts = os.path.join(self.k8oebps,'Fonts')
if not unipath.exists(self.k8fonts):
unipath.mkdir(self.k8fonts)
self.k8styles = os.path.join(self.k8oebps,'Styles')
if not unipath.exists(self.k8styles):
unipath.mkdir(self.k8styles)
self.k8text = os.path.join(self.k8oebps,'Text')
if not unipath.exists(self.k8text):
unipath.mkdir(self.k8text)
# recursive zip creation support routine
def zipUpDir(self, myzip, tdir, localname):
currentdir = tdir
if localname != "":
currentdir = os.path.join(currentdir,localname)
list = unipath.listdir(currentdir)
for file in list:
afilename = file
localfilePath = os.path.join(localname, afilename)
realfilePath = os.path.join(currentdir,file)
if unipath.isfile(realfilePath):
myzip.write(pathof(realfilePath), pathof(localfilePath), zipfile.ZIP_DEFLATED)
elif unipath.isdir(realfilePath):
self.zipUpDir(myzip, tdir, localfilePath)
def makeEPUB(self, usedmap, obfuscate_data, uid):
bname = os.path.join(self.k8dir, self.getInputFileBasename() + '.epub')
# Create an encryption key for Adobe font obfuscation
# based on the epub's uid
if isinstance(uid,text_type):
uid = uid.encode('ascii')
if obfuscate_data:
key = re.sub(br'[^a-fA-F0-9]', b'', uid)
key = binascii.unhexlify((key + key)[:32])
# copy over all images and fonts that are actually used in the ebook
# and remove all font files from mobi7 since not supported
imgnames = unipath.listdir(self.imgdir)
for name in imgnames:
if usedmap.get(name,'not used') == 'used':
filein = os.path.join(self.imgdir,name)
if name.endswith(".ttf"):
fileout = os.path.join(self.k8fonts,name)
elif name.endswith(".otf"):
fileout = os.path.join(self.k8fonts,name)
elif name.endswith(".failed"):
fileout = os.path.join(self.k8fonts,name)
else:
fileout = os.path.join(self.k8images,name)
data = b''
with open(pathof(filein),'rb') as f:
data = f.read()
if obfuscate_data:
if name in obfuscate_data:
data = mangle_fonts(key, data)
open(pathof(fileout),'wb').write(data)
if name.endswith(".ttf") or name.endswith(".otf"):
os.remove(pathof(filein))
# opf file name hard coded to "content.opf"
container = '<?xml version="1.0" encoding="UTF-8"?>\n'
container += '<container version="1.0" xmlns="urn:oasis:names:tc:opendocument:xmlns:container">\n'
container += ' <rootfiles>\n'
container += '<rootfile full-path="OEBPS/content.opf" media-type="application/oebps-package+xml"/>'
container += ' </rootfiles>\n</container>\n'
fileout = os.path.join(self.k8metainf,'container.xml')
with open(pathof(fileout),'wb') as f:
f.write(container.encode('utf-8'))
if obfuscate_data:
encryption = '<encryption xmlns="urn:oasis:names:tc:opendocument:xmlns:container" \
xmlns:enc="http://www.w3.org/2001/04/xmlenc#" xmlns:deenc="http://ns.adobe.com/digitaleditions/enc">\n'
for font in obfuscate_data:
encryption += ' <enc:EncryptedData>\n'
encryption += ' <enc:EncryptionMethod Algorithm="http://ns.adobe.com/pdf/enc#RC"/>\n'
encryption += ' <enc:CipherData>\n'
encryption += ' <enc:CipherReference URI="OEBPS/Fonts/' + font + '"/>\n'
encryption += ' </enc:CipherData>\n'
encryption += ' </enc:EncryptedData>\n'
encryption += '</encryption>\n'
fileout = os.path.join(self.k8metainf,'encryption.xml')
with open(pathof(fileout),'wb') as f:
f.write(encryption.encode('utf-8'))
# ready to build epub
self.outzip = zipfile.ZipFile(pathof(bname), 'w')
# add the mimetype file uncompressed
mimetype = b'application/epub+zip'
fileout = os.path.join(self.k8dir,'mimetype')
with open(pathof(fileout),'wb') as f:
f.write(mimetype)
nzinfo = ZipInfo('mimetype', compress_type=zipfile.ZIP_STORED)
nzinfo.external_attr = 0o600 << 16 # make this a normal file
self.outzip.writestr(nzinfo, mimetype)
self.zipUpDir(self.outzip,self.k8dir,'META-INF')
self.zipUpDir(self.outzip,self.k8dir,'OEBPS')
self.outzip.close()
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