mirror of
https://github.com/janeczku/calibre-web
synced 2024-12-27 02:20:31 +00:00
318 lines
13 KiB
Python
318 lines
13 KiB
Python
#!/usr/bin/env python
|
|
# -*- coding: utf-8 -*-
|
|
|
|
# This file is part of the Calibre-Web (https://github.com/janeczku/calibre-web)
|
|
# Copyright (C) 2012-2019 lemmsh cervinko Kennyl matthazinski OzzieIsaacs
|
|
#
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
from __future__ import division, print_function, unicode_literals
|
|
import os
|
|
import hashlib
|
|
import struct
|
|
from tempfile import gettempdir
|
|
|
|
from flask_babel import gettext as _
|
|
|
|
from . import logger, comic
|
|
from .constants import BookMeta
|
|
|
|
|
|
log = logger.create()
|
|
|
|
|
|
try:
|
|
from lxml.etree import LXML_VERSION as lxmlversion
|
|
except ImportError:
|
|
lxmlversion = None
|
|
|
|
try:
|
|
from wand.image import Image
|
|
from wand import version as ImageVersion
|
|
from wand.exceptions import PolicyError
|
|
use_generic_pdf_cover = False
|
|
except (ImportError, RuntimeError) as e:
|
|
log.debug('cannot import Image, generating pdf covers for pdf uploads will not work: %s', e)
|
|
use_generic_pdf_cover = True
|
|
|
|
try:
|
|
from PyPDF2 import PdfFileReader
|
|
from PyPDF2 import __version__ as PyPdfVersion
|
|
use_pdf_meta = True
|
|
except ImportError as e:
|
|
log.debug('cannot import PyPDF2, extracting pdf metadata will not work: %s', e)
|
|
use_pdf_meta = False
|
|
|
|
try:
|
|
from . import epub
|
|
use_epub_meta = True
|
|
except ImportError as e:
|
|
log.debug('cannot import epub, extracting epub metadata will not work: %s', e)
|
|
use_epub_meta = False
|
|
|
|
try:
|
|
from . import fb2
|
|
use_fb2_meta = True
|
|
except ImportError as e:
|
|
log.debug('cannot import fb2, extracting fb2 metadata will not work: %s', e)
|
|
use_fb2_meta = False
|
|
|
|
try:
|
|
from PIL import Image, ImageOps
|
|
from PIL import __version__ as PILversion
|
|
use_PIL = True
|
|
except ImportError as e:
|
|
log.debug('cannot import Pillow, using png and webp images as cover will not work: %s', e)
|
|
use_generic_pdf_cover = True
|
|
use_PIL = False
|
|
|
|
|
|
|
|
__author__ = 'lemmsh'
|
|
|
|
|
|
def process(tmp_file_path, original_file_name, original_file_extension):
|
|
meta = None
|
|
try:
|
|
if ".PDF" == original_file_extension.upper():
|
|
meta = pdf_meta(tmp_file_path, original_file_name, original_file_extension)
|
|
if ".EPUB" == original_file_extension.upper() and use_epub_meta is True:
|
|
meta = epub.get_epub_info(tmp_file_path, original_file_name, original_file_extension)
|
|
if ".FB2" == original_file_extension.upper() and use_fb2_meta is True:
|
|
meta = fb2.get_fb2_info(tmp_file_path, original_file_extension)
|
|
if original_file_extension.upper() in ['.CBZ', '.CBT']:
|
|
meta = comic.get_comic_info(tmp_file_path, original_file_name, original_file_extension)
|
|
|
|
except Exception as ex:
|
|
log.warning('cannot parse metadata, using default: %s', ex)
|
|
|
|
if meta and meta.title.strip() and meta.author.strip():
|
|
return meta
|
|
else:
|
|
return default_meta(tmp_file_path, original_file_name, original_file_extension)
|
|
|
|
|
|
def default_meta(tmp_file_path, original_file_name, original_file_extension):
|
|
return BookMeta(
|
|
file_path=tmp_file_path,
|
|
extension=original_file_extension,
|
|
title=original_file_name,
|
|
author=u"Unknown",
|
|
cover=None,
|
|
description="",
|
|
tags="",
|
|
series="",
|
|
series_id="",
|
|
languages="")
|
|
|
|
|
|
def pdf_meta(tmp_file_path, original_file_name, original_file_extension):
|
|
|
|
if use_pdf_meta:
|
|
pdf = PdfFileReader(open(tmp_file_path, 'rb'))
|
|
doc_info = pdf.getDocumentInfo()
|
|
else:
|
|
doc_info = None
|
|
|
|
if doc_info is not None:
|
|
author = doc_info.author if doc_info.author else u"Unknown"
|
|
title = doc_info.title if doc_info.title else original_file_name
|
|
subject = doc_info.subject
|
|
else:
|
|
author = u"Unknown"
|
|
title = original_file_name
|
|
subject = ""
|
|
return BookMeta(
|
|
file_path=tmp_file_path,
|
|
extension=original_file_extension,
|
|
title=title,
|
|
author=author,
|
|
cover=pdf_preview(tmp_file_path, original_file_name),
|
|
description=subject,
|
|
tags="",
|
|
series="",
|
|
series_id="",
|
|
languages="")
|
|
|
|
|
|
def CMYKInvert(img):
|
|
return Image.merge(img.mode,[ImageOps.invert(b.convert('L')) for b in img.split()])
|
|
|
|
def tiff_header_for_CCITT(width, height, img_size, CCITT_group=4):
|
|
tiff_header_struct = '<' + '2s' + 'h' + 'l' + 'h' + 'hhll' * 8 + 'h'
|
|
return struct.pack(tiff_header_struct,
|
|
b'II', # Byte order indication: Little indian
|
|
42, # Version number (always 42)
|
|
8, # Offset to first IFD
|
|
8, # Number of tags in IFD
|
|
256, 4, 1, width, # ImageWidth, LONG, 1, width
|
|
257, 4, 1, height, # ImageLength, LONG, 1, lenght
|
|
258, 3, 1, 1, # BitsPerSample, SHORT, 1, 1
|
|
259, 3, 1, CCITT_group, # Compression, SHORT, 1, 4 = CCITT Group 4 fax encoding
|
|
262, 3, 1, 0, # Threshholding, SHORT, 1, 0 = WhiteIsZero
|
|
273, 4, 1, struct.calcsize(tiff_header_struct), # StripOffsets, LONG, 1, len of header
|
|
278, 4, 1, height, # RowsPerStrip, LONG, 1, lenght
|
|
279, 4, 1, img_size, # StripByteCounts, LONG, 1, size of image
|
|
0 # last IFD
|
|
)
|
|
|
|
def pdf_preview(tmp_file_path, tmp_dir):
|
|
if use_generic_pdf_cover:
|
|
return None
|
|
else:
|
|
if use_PIL:
|
|
try:
|
|
input1 = PdfFileReader(open(tmp_file_path, 'rb'), strict=False)
|
|
page0 = input1.getPage(0)
|
|
mediaBox = page0['/MediaBox']
|
|
box = page0['/CropBox'] if '/CropBox' in page0 else mediaBox
|
|
xObject = page0['/Resources']['/XObject'].getObject()
|
|
|
|
for obj in xObject:
|
|
if xObject[obj]['/Subtype'] == '/Image':
|
|
size = (xObject[obj]['/Width'], xObject[obj]['/Height'])
|
|
data = xObject[obj]._data
|
|
mode = "P"
|
|
if xObject[obj]['/ColorSpace'] == '/DeviceRGB':
|
|
mode = "RGB"
|
|
if xObject[obj]['/ColorSpace'] == '/DeviceCMYK':
|
|
mode = "CMYK"
|
|
if '/Filter' in xObject[obj]:
|
|
if xObject[obj]['/Filter'] == '/FlateDecode':
|
|
img = Image.frombytes(mode, size, data)
|
|
cover_file_name = os.path.splitext(tmp_file_path)[0] + ".cover.png"
|
|
img.save(filename=os.path.join(tmp_dir, cover_file_name))
|
|
return cover_file_name
|
|
# img.save(obj[1:] + ".png")
|
|
elif xObject[obj]['/Filter'] == '/DCTDecode':
|
|
cover_file_name = os.path.splitext(tmp_file_path)[0] + ".cover.jpg"
|
|
img = open(cover_file_name, "wb")
|
|
img.write(data)
|
|
img.close()
|
|
# Post processing
|
|
img2 = Image.open(cover_file_name)
|
|
width, height = img2.size
|
|
if mode == 'CMYK':
|
|
img2 = CMYKInvert(img2)
|
|
img2 = img2.crop((box[0]/mediaBox[2]*width,
|
|
box[1]/mediaBox[3]*height,
|
|
box[2]/mediaBox[2]*width,
|
|
box[3]/mediaBox[3]*height))
|
|
img2.save(cover_file_name)
|
|
return cover_file_name
|
|
elif xObject[obj]['/Filter'] == '/JPXDecode':
|
|
cover_file_name = os.path.splitext(tmp_file_path)[0] + ".cover.jp2"
|
|
img = open(cover_file_name, "wb")
|
|
img.write(data)
|
|
img.close()
|
|
# Post processing
|
|
img2 = Image.open(cover_file_name)
|
|
width, height = img2.size
|
|
if mode == 'CMYK':
|
|
img2 = CMYKInvert(img2)
|
|
img2 = img2.crop((box[0]/mediaBox[2]*width,
|
|
box[1]/mediaBox[3]*height,
|
|
box[2]/mediaBox[2]*width,
|
|
box[3]/mediaBox[3]*height))
|
|
img2.save(cover_file_name)
|
|
return cover_file_name
|
|
elif xObject[obj]['/Filter'] == '/CCITTFaxDecode':
|
|
if xObject[obj]['/DecodeParms']['/K'] == -1:
|
|
CCITT_group = 4
|
|
else:
|
|
CCITT_group = 3
|
|
width = xObject[obj]['/Width']
|
|
height = xObject[obj]['/Height']
|
|
img_size = len(data)
|
|
tiff_header = tiff_header_for_CCITT(width, height, img_size, CCITT_group)
|
|
cover_file_name_tiff = os.path.splitext(tmp_file_path)[0] + obj[1:] + '.tiff'
|
|
cover_file_name = os.path.splitext(tmp_file_path)[0] + obj[1:] + '.jpg'
|
|
img = open(cover_file_name_tiff, "wb")
|
|
img.write(tiff_header + data)
|
|
img.close()
|
|
# Post processing
|
|
img2 = Image.open(cover_file_name_tiff)
|
|
if img2.mode == '1':
|
|
img2 = ImageOps.invert(img2.convert('RGB'))
|
|
img2.save(cover_file_name)
|
|
return cover_file_name
|
|
else:
|
|
img = Image.frombytes(mode, size, data)
|
|
cover_file_name = os.path.splitext(tmp_file_path)[0] + ".cover.png"
|
|
img.save(filename=os.path.join(tmp_dir, cover_file_name))
|
|
return cover_file_name
|
|
# img.save(obj[1:] + ".png")
|
|
except Exception as ex:
|
|
print(ex)
|
|
|
|
try:
|
|
cover_file_name = os.path.splitext(tmp_file_path)[0] + ".cover.jpg"
|
|
with Image(filename=tmp_file_path + "[0]", resolution=150) as img:
|
|
img.compression_quality = 88
|
|
img.save(filename=os.path.join(tmp_dir, cover_file_name))
|
|
return cover_file_name
|
|
except PolicyError as ex:
|
|
log.warning('Pdf extraction forbidden by Imagemagick policy: %s', ex)
|
|
return None
|
|
except Exception as ex:
|
|
log.warning('Cannot extract cover image, using default: %s', ex)
|
|
return None
|
|
|
|
|
|
def get_versions():
|
|
if not use_generic_pdf_cover:
|
|
IVersion = ImageVersion.MAGICK_VERSION
|
|
WVersion = ImageVersion.VERSION
|
|
else:
|
|
IVersion = u'not installed'
|
|
WVersion = u'not installed'
|
|
if use_pdf_meta:
|
|
PVersion='v'+PyPdfVersion
|
|
else:
|
|
PVersion=u'not installed'
|
|
if lxmlversion:
|
|
XVersion = 'v'+'.'.join(map(str, lxmlversion))
|
|
else:
|
|
XVersion = u'not installed'
|
|
if use_PIL:
|
|
PILVersion = 'v' + PILversion
|
|
else:
|
|
PILVersion = u'not installed'
|
|
if comic.use_comic_meta:
|
|
ComicVersion = u'installed'
|
|
else:
|
|
ComicVersion = u'not installed'
|
|
return {'Image Magick': IVersion,
|
|
'PyPdf': PVersion,
|
|
'lxml':XVersion,
|
|
'Wand': WVersion,
|
|
'Pillow': PILVersion,
|
|
'Comic_API': ComicVersion}
|
|
|
|
|
|
def upload(uploadfile):
|
|
tmp_dir = os.path.join(gettempdir(), 'calibre_web')
|
|
|
|
if not os.path.isdir(tmp_dir):
|
|
os.mkdir(tmp_dir)
|
|
|
|
filename = uploadfile.filename
|
|
filename_root, file_extension = os.path.splitext(filename)
|
|
md5 = hashlib.md5()
|
|
md5.update(filename.encode('utf-8'))
|
|
tmp_file_path = os.path.join(tmp_dir, md5.hexdigest())
|
|
uploadfile.save(tmp_file_path)
|
|
meta = process(tmp_file_path, filename_root, file_extension)
|
|
return meta
|