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Epub.py
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import zipfile
import re
import os
import codecs
import urllib.request
nl = '\r\n'
def str_mid(string: str, left: str, right: str, start=None, end=None):
pos1 = string.find(left, start, end)
if pos1 > -1:
pos2 = string.find(right, pos1 + len(left), end)
if pos2 > -1:
return string[pos1 + len(left): pos2]
return ''
def getallfiles(dirpath: str):
result = list()
for _name in os.listdir(dirpath):
if os.path.isdir(dirpath + '/' + _name):
result.extend(getallfiles(dirpath + '/' + _name))
else:
result.append(dirpath + '/' + _name)
return result
class EpubFile:
_filepath = ''
_tempdir = ''
_content_opf = ''
_content_opf_manifest = ''
_content_opf_spine = ''
_chapter_format_manifest = ''
_image_format_manifest = ''
_chapter_format_spine = ''
_toc_ncx = ''
_toc_ncx_navMap = ''
_chapter_format_navMap = ''
_chapter_format = ''
def __init__(self, filepath: str, tempdir: str, book_id: str, book_title: str, book_author: str):
self._filepath = filepath
self._tempdir = tempdir
if not os.path.isdir(tempdir):
os.makedirs(tempdir)
_template = zipfile.ZipFile(os.getcwd() + "/template/template.epub")
self._content_opf = bytes(_template.read('OEBPS/content.opf')).decode()
self._chapter_format_manifest = str_mid(self._content_opf, '${chapter_format_manifest}={{{', '}}}')
self._image_format_manifest = str_mid(self._content_opf, '${image_format_manifest}={{{', '}}}')
self._chapter_format_spine = str_mid(self._content_opf, '${chapter_format_spine}={{{', '}}}')
self._toc_ncx = bytes(_template.read('OEBPS/toc.ncx')).decode()
self._chapter_format_navMap = str_mid(self._toc_ncx, '${chapter_format_navMap}={{{', '}}}')
self._chapter_format = bytes(_template.read('OEBPS/Text/${chapter_format}.xhtml')).decode()
if os.path.isfile(filepath):
try:
with zipfile.ZipFile(self._filepath, 'r', zipfile.ZIP_DEFLATED) as _file:
try:
self._content_opf = bytes(_file.read('OEBPS/content.opf')).decode()
self._toc_ncx = bytes(_file.read('OEBPS/toc.ncx')).decode()
_file.extractall(self._tempdir)
except (KeyError, NameError, IOError):
self._content_opf = bytes(_template.read('OEBPS/content.opf')).decode()
self._toc_ncx = bytes(_template.read('OEBPS/toc.ncx')).decode()
finally:
self._content_opf_manifest = str_mid(self._content_opf, '<manifest>', '</manifest>')
self._content_opf_spine = str_mid(self._content_opf, '<spine toc="ncx">', '</spine>')
self._toc_ncx_navMap = str_mid(self._toc_ncx, '<navMap>', '</navMap>')
_init = False
except zipfile.BadZipFile:
_init = True
else:
_init = True
if _init:
for _name in _template.namelist():
if _name.find('$') == -1:
_template.extract(_name, self._tempdir)
self._content_opf = re.sub(r'\${.*?}={{{[\S\s]*?}}}[\r\n]*', '', self._content_opf)
self._toc_ncx = re.sub(r'\${.*?}={{{[\S\s]*?}}}[\r\n]*', '', self._toc_ncx)
self._content_opf_manifest = str_mid(self._content_opf, '<manifest>', '</manifest>')
self._content_opf_spine = str_mid(self._content_opf, '<spine toc="ncx">', '</spine>')
self._toc_ncx_navMap = str_mid(self._toc_ncx, '<navMap>', '</navMap>')
self._content_opf = self._content_opf.replace('${book_id}', book_id)
self._content_opf = self._content_opf.replace('${book_title}', book_title)
self._content_opf = self._content_opf.replace('${book_author}', book_author)
self._toc_ncx = self._toc_ncx.replace('${book_id}', book_id)
self._toc_ncx = self._toc_ncx.replace('${book_title}', book_title)
self._toc_ncx = self._toc_ncx.replace('${book_author}', book_author)
with codecs.open(self._tempdir + '/OEBPS/content.opf', 'w', 'utf-8') as _file:
_file.write(self._content_opf)
with codecs.open(self._tempdir + '/OEBPS/toc.ncx', 'w', 'utf-8') as _file:
_file.write(self._toc_ncx)
_template.close()
def _add_manifest_chapter(self, chapter_id: str):
if self._content_opf_manifest.find('id="' + chapter_id + '.xhtml"') == -1:
_before = self._content_opf_manifest
self._content_opf_manifest += self._chapter_format_manifest.replace('${chapter_id}', chapter_id) + nl
self._content_opf = self._content_opf.replace(
'<manifest>' + _before + '</manifest>',
'<manifest>' + self._content_opf_manifest + '</manifest>', 1)
def _add_manifest_image(self, filename: str):
if self._content_opf_manifest.find('id="' + filename + '"') == -1:
_before = self._content_opf_manifest
if filename.endswith('.png'):
_media_type = 'image/png'
else:
_media_type = 'image/jpeg'
self._content_opf_manifest += self._image_format_manifest.replace('${filename}', filename) \
.replace('${media_type}', _media_type) + nl
self._content_opf = self._content_opf.replace(
'<manifest>' + _before + '</manifest>',
'<manifest>' + self._content_opf_manifest + '</manifest>', 1)
def _add_spine(self, chapter_id: str):
if self._content_opf_spine.find('idref="' + chapter_id + '.xhtml"') == -1:
_before = self._content_opf_spine
self._content_opf_spine += self._chapter_format_spine.replace('${chapter_id}', chapter_id) + nl
self._content_opf = self._content_opf.replace(
'<spine toc="ncx">' + _before + '</spine>',
'<spine toc="ncx">' + self._content_opf_spine + '</spine>', 1)
def _add_navMap(self, chapter_index: str, chapter_id: str, chapter_title: str):
if self._toc_ncx_navMap.find('id="' + chapter_id) == -1:
_before = self._toc_ncx_navMap
self._toc_ncx_navMap += self._chapter_format_navMap.replace('${chapter_id}', chapter_id) \
.replace('${chapter_index}', chapter_index) \
.replace('${chapter_title}', chapter_title) + nl
self._toc_ncx = self._toc_ncx.replace(
'<navMap>' + _before + '</navMap>',
'<navMap>' + self._toc_ncx_navMap + '</navMap>', 1)
def _save(self):
with codecs.open(self._tempdir + '/OEBPS/content.opf', 'w', 'utf-8') as _file:
_file.write(self._content_opf)
with codecs.open(self._tempdir + '/OEBPS/toc.ncx', 'w', 'utf-8') as _file:
_file.write(self._toc_ncx)
def setcover(self, url: str):
urllib.request.urlretrieve(url, self._tempdir + '/OEBPS/Images/cover.jpg')
def addchapter(self, chapter_index: str, chapter_id: str, chapter_title: str, chapter_content: str):
with codecs.open(self._tempdir + '/OEBPS/Text/' + chapter_id + '.xhtml', 'w', 'utf-8') as _file:
_data = self._chapter_format.replace('${chapter_title}', chapter_title) \
.replace('${chapter_content}', '<h3>' + chapter_title + '</h3>' + nl + chapter_content)
for _img in re.findall(r'<img src="http.*?>', _data):
_img = _img.replace('>', ' />')
_src = str_mid(_img, '<img src="', '"')
if _src.rfind('/') == -1:
continue
_filename = _src[_src.rfind('/') + 1:]
self.addimage(_filename, _src)
_data = _data.replace(_src, '../Images/' + _filename)
_file.write(_data)
self._add_manifest_chapter(chapter_id)
self._add_spine(chapter_id)
self._add_navMap(chapter_index, chapter_id, chapter_title)
def addimage(self, filename: str, url: str):
try:
urllib.request.urlretrieve(url, self._tempdir + '/OEBPS/Images/' + filename)
except (KeyboardInterrupt, InterruptedError) as _e:
raise _e
except Exception as _e:
print("[ERROR]", _e)
print("下载插图时出现错误，已跳过")
with open(self._tempdir + '/OEBPS/Images/' + filename, 'wb'):
pass
self._add_manifest_image(filename)
def addimagechapter(self, chapter_index: str, chapter_id: str, chapter_title: str, image: bytes):
self.addchapter(chapter_index, chapter_id, chapter_title,
'<img src="../Images/' + chapter_id + '.png" alt=\'' + chapter_title + '\' />')
with open(self._tempdir + '/OEBPS/Images/' + chapter_id + '.png', 'wb') as _file:
_file.write(image)
self._add_manifest_image(chapter_id + '.png')
def fixchapter(self, chapter_id: str, chapter_title: str, chapter_content: str):
with codecs.open(self._tempdir + '/OEBPS/Text/' + chapter_id + '.xhtml', 'w', 'utf-8') as _file:
_data = self._chapter_format.replace('${chapter_title}', chapter_title) \
.replace('${chapter_content}', chapter_content)
for _img in re.findall(r'<img src="http.*?>', _data):
_img = _img.replace('>', ' />')
_src = str_mid(_img, '<img src="', '"')
if _src.rfind('/') == -1:
continue
_filename = _src[_src.rfind('/') + 1:]
_data = _data.replace(_src, '../Images/' + _filename)
_file.write(_data)
def fiximagechapter(self, chapter_id: str, chapter_title: str, image: bytes):
self.fixchapter(chapter_id, chapter_title,
'<img src="../Images/' + chapter_id + '.png" alt=\'' + chapter_title + '\' />')
with open(self._tempdir + '/OEBPS/Images/' + chapter_id + '.png', 'wb') as _file:
_file.write(image)
self._add_manifest_image(chapter_id + '.png')
def export(self):
self._save()
with zipfile.ZipFile(self._filepath, 'w', zipfile.ZIP_DEFLATED) as _file:
_result = getallfiles(self._tempdir)
for _name in _result:
_file.write(_name, _name.replace(self._tempdir + '/', ''))
def export_txt(self):
self._save()
with codecs.open(self._filepath.replace('.epub', '.txt'), 'w', 'utf-8') as _file:
for _name in sorted(os.listdir(self._tempdir + '/OEBPS/Text')):
if _name.find('$') > -1 or _name == 'cover.xhtml':
continue
with codecs.open(self._tempdir + '/OEBPS/Text/' + _name, 'r', 'utf-8') as _file_xhtml:
_data_chapter = re.sub(r'<h3>.*?</h3>', '', str(_file_xhtml.read()))
for _a in re.findall(r'<a href=.*?>章节链接</a>', _data_chapter):
_data_chapter = _data_chapter.replace(_a, '章节链接:' + str_mid(_a, '<a href="', '"'))
for _img in re.findall(r'<img src=.*?>', _data_chapter):
_data_chapter = _data_chapter.replace(_img, '图片:"' + str_mid(_img, "alt='", "'") + '",' +
'位置:"' + str_mid(_img, '<img src="', '"')
.replace('../', '') + '"')
_data_chapter = re.sub(r'</?[\S\s]*?>', '', _data_chapter)
_data_chapter = re.sub(r'[\r\n]+', nl * 2, _data_chapter)
_file.write(_data_chapter + nl)