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calibre-web/cps/worker.py

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# -*- coding: utf-8 -*-
# This file is part of the Calibre-Web (https://github.com/janeczku/calibre-web)
# Copyright (C) 2018-2019 OzzieIsaacs, bodybybuddha, janeczku
#
# 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 sys
import os
import re
import smtplib
import socket
import time
import threading
from datetime import datetime
try:
from StringIO import StringIO
from email.MIMEBase import MIMEBase
from email.MIMEMultipart import MIMEMultipart
from email.MIMEText import MIMEText
except ImportError:
from io import StringIO
from email.mime.base import MIMEBase
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from email import encoders
from email.utils import formatdate
from email.utils import make_msgid
from email.generator import Generator
from flask_babel import gettext as _
from . import logger, config, db, gdriveutils
from .subproc_wrapper import process_open
log = logger.create()
chunksize = 8192
# task 'status' consts
STAT_WAITING = 0
STAT_FAIL = 1
STAT_STARTED = 2
STAT_FINISH_SUCCESS = 3
#taskType consts
TASK_EMAIL = 1
TASK_CONVERT = 2
TASK_UPLOAD = 3
TASK_CONVERT_ANY = 4
RET_FAIL = 0
RET_SUCCESS = 1
def _get_main_thread():
for t in threading.enumerate():
if t.__class__.__name__ == '_MainThread':
return t
raise Exception("main thread not found?!")
# For gdrive download book from gdrive to calibredir (temp dir for books), read contents in both cases and append
# it in MIME Base64 encoded to
def get_attachment(bookpath, filename):
"""Get file as MIMEBase message"""
calibrepath = config.config_calibre_dir
if config.config_use_google_drive:
df = gdriveutils.getFileFromEbooksFolder(bookpath, filename)
if df:
datafile = os.path.join(calibrepath, bookpath, filename)
if not os.path.exists(os.path.join(calibrepath, bookpath)):
os.makedirs(os.path.join(calibrepath, bookpath))
df.GetContentFile(datafile)
else:
return None
file_ = open(datafile, 'rb')
data = file_.read()
file_.close()
os.remove(datafile)
else:
try:
file_ = open(os.path.join(calibrepath, bookpath, filename), 'rb')
data = file_.read()
file_.close()
except IOError as e:
log.exception(e) # traceback.print_exc()
log.error(u'The requested file could not be read. Maybe wrong permissions?')
return None
attachment = MIMEBase('application', 'octet-stream')
attachment.set_payload(data)
encoders.encode_base64(attachment)
attachment.add_header('Content-Disposition', 'attachment',
filename=filename)
return attachment
# Class for sending email with ability to get current progress
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class emailbase():
transferSize = 0
progress = 0
def data(self, msg):
self.transferSize = len(msg)
(code, resp) = smtplib.SMTP.data(self, msg)
self.progress = 0
return (code, resp)
def send(self, strg):
"""Send `strg' to the server."""
log.debug('send: %r', strg[:300])
if hasattr(self, 'sock') and self.sock:
try:
if self.transferSize:
lock=threading.Lock()
lock.acquire()
self.transferSize = len(strg)
lock.release()
for i in range(0, self.transferSize, chunksize):
if isinstance(strg, bytes):
self.sock.send((strg[i:i+chunksize]))
else:
self.sock.send((strg[i:i + chunksize]).encode('utf-8'))
lock.acquire()
self.progress = i
lock.release()
else:
self.sock.sendall(strg.encode('utf-8'))
except socket.error:
self.close()
raise smtplib.SMTPServerDisconnected('Server not connected')
else:
raise smtplib.SMTPServerDisconnected('please run connect() first')
@classmethod
def _print_debug(self, *args):
log.debug(args)
def getTransferStatus(self):
if self.transferSize:
lock2 = threading.Lock()
lock2.acquire()
value = int((float(self.progress) / float(self.transferSize))*100)
lock2.release()
return str(value) + ' %'
else:
return "100 %"
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# Class for sending email with ability to get current progress, derived from emailbase class
class email(emailbase, smtplib.SMTP):
def __init__(self, *args, **kwargs):
smtplib.SMTP.__init__(self, *args, **kwargs)
# Class for sending ssl encrypted email with ability to get current progress, , derived from emailbase class
class email_SSL(emailbase, smtplib.SMTP_SSL):
def __init__(self, *args, **kwargs):
smtplib.SMTP_SSL.__init__(self, *args, **kwargs)
#Class for all worker tasks in the background
class WorkerThread(threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
self.status = 0
self.current = 0
self.last = 0
self.queue = list()
self.UIqueue = list()
self.asyncSMTP = None
self.id = 0
self.doLock = threading.Lock()
# Main thread loop starting the different tasks
def run(self):
main_thread = _get_main_thread()
while main_thread.is_alive():
try:
self.doLock.acquire()
if self.current != self.last:
index = self.current
self.doLock.release()
if self.queue[index]['taskType'] == TASK_EMAIL:
self._send_raw_email()
if self.queue[index]['taskType'] == TASK_CONVERT:
self._convert_any_format()
if self.queue[index]['taskType'] == TASK_CONVERT_ANY:
self._convert_any_format()
# TASK_UPLOAD is handled implicitly
self.doLock.acquire()
self.current += 1
if self.current > self.last:
self.current = self.last
self.doLock.release()
else:
self.doLock.release()
except Exception as e:
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log.exception(e)
self.doLock.release()
if main_thread.is_alive():
time.sleep(1)
def get_send_status(self):
if self.asyncSMTP:
return self.asyncSMTP.getTransferStatus()
else:
return "0 %"
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def _delete_completed_tasks(self):
for index, task in reversed(list(enumerate(self.UIqueue))):
if task['progress'] == "100 %":
# delete tasks
self.queue.pop(index)
self.UIqueue.pop(index)
# if we are deleting entries before the current index, adjust the index
if index <= self.current and self.current:
self.current -= 1
self.last = len(self.queue)
def get_taskstatus(self):
self.doLock.acquire()
if self.current < len(self.queue):
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if self.UIqueue[self.current]['stat'] == STAT_STARTED:
if self.queue[self.current]['taskType'] == TASK_EMAIL:
self.UIqueue[self.current]['progress'] = self.get_send_status()
self.UIqueue[self.current]['formRuntime'] = datetime.now() - self.queue[self.current]['starttime']
self.UIqueue[self.current]['rt'] = self.UIqueue[self.current]['formRuntime'].days*24*60 \
+ self.UIqueue[self.current]['formRuntime'].seconds \
+ self.UIqueue[self.current]['formRuntime'].microseconds
self.doLock.release()
return self.UIqueue
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def _convert_any_format(self):
# convert book, and upload in case of google drive
self.doLock.acquire()
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index = self.current
self.doLock.release()
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self.UIqueue[index]['stat'] = STAT_STARTED
self.queue[index]['starttime'] = datetime.now()
self.UIqueue[index]['formStarttime'] = self.queue[index]['starttime']
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curr_task = self.queue[index]['taskType']
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filename = self._convert_ebook_format()
if filename:
if config.config_use_google_drive:
gdriveutils.updateGdriveCalibreFromLocal()
if curr_task == TASK_CONVERT:
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self.add_email(self.queue[index]['settings']['subject'], self.queue[index]['path'],
filename, self.queue[index]['settings'], self.queue[index]['kindle'],
self.UIqueue[index]['user'], self.queue[index]['title'],
self.queue[index]['settings']['body'])
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def _convert_ebook_format(self):
error_message = None
self.doLock.acquire()
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index = self.current
self.doLock.release()
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file_path = self.queue[index]['file_path']
bookid = self.queue[index]['bookid']
format_old_ext = u'.' + self.queue[index]['settings']['old_book_format'].lower()
format_new_ext = u'.' + self.queue[index]['settings']['new_book_format'].lower()
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# check to see if destination format already exists -
# if it does - mark the conversion task as complete and return a success
# this will allow send to kindle workflow to continue to work
if os.path.isfile(file_path + format_new_ext):
log.info("Book id %d already converted to %s", bookid, format_new_ext)
cur_book = db.session.query(db.Books).filter(db.Books.id == bookid).first()
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self.queue[index]['path'] = file_path
self.queue[index]['title'] = cur_book.title
self._handleSuccess()
return file_path + format_new_ext
else:
log.info("Book id %d - target format of %s does not exist. Moving forward with convert.", bookid, format_new_ext)
# check if converter-executable is existing
if not os.path.exists(config.config_converterpath):
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# ToDo Text is not translated
self._handleError(u"Convertertool %s not found" % config.config_converterpath)
return
try:
# check which converter to use kindlegen is "1"
if format_old_ext == '.epub' and format_new_ext == '.mobi':
if config.config_ebookconverter == 1:
'''if os.name == 'nt':
command = config.config_converterpath + u' "' + file_path + u'.epub"'
if sys.version_info < (3, 0):
command = command.encode(sys.getfilesystemencoding())
else:'''
command = [config.config_converterpath, file_path + u'.epub']
quotes = [1]
if config.config_ebookconverter == 2:
# Linux py2.7 encode as list without quotes no empty element for parameters
# linux py3.x no encode and as list without quotes no empty element for parameters
# windows py2.7 encode as string with quotes empty element for parameters is okay
# windows py 3.x no encode and as string with quotes empty element for parameters is okay
# separate handling for windows and linux
quotes = [1,2]
'''if os.name == 'nt':
command = config.config_converterpath + u' "' + file_path + format_old_ext + u'" "' + \
file_path + format_new_ext + u'" ' + config.config_calibre
if sys.version_info < (3, 0):
command = command.encode(sys.getfilesystemencoding())
else:'''
command = [config.config_converterpath, (file_path + format_old_ext),
(file_path + format_new_ext)]
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quotes_index = 3
if config.config_calibre:
parameters = config.config_calibre.split(" ")
for param in parameters:
command.append(param)
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quotes.append(quotes_index)
quotes_index += 1
p = process_open(command, quotes)
# p = subprocess.Popen(command, stdout=subprocess.PIPE, universal_newlines=True)
except OSError as e:
self._handleError(_(u"Ebook-converter failed: %(error)s", error=e))
return
if config.config_ebookconverter == 1:
nextline = p.communicate()[0]
# Format of error message (kindlegen translates its output texts):
# Error(prcgen):E23006: Language not recognized in metadata.The dc:Language field is mandatory.Aborting.
conv_error = re.search(r".*\(.*\):(E\d+):\s(.*)", nextline, re.MULTILINE)
# If error occoures, store error message for logfile
if conv_error:
error_message = _(u"Kindlegen failed with Error %(error)s. Message: %(message)s",
error=conv_error.group(1), message=conv_error.group(2).strip())
log.debug("convert_kindlegen: %s", nextline)
else:
while p.poll() is None:
nextline = p.stdout.readline()
if os.name == 'nt' and sys.version_info < (3, 0):
nextline = nextline.decode('windows-1252')
elif os.name == 'posix' and sys.version_info < (3, 0):
nextline = nextline.decode('utf-8')
log.debug(nextline.strip('\r\n'))
# parse progress string from calibre-converter
progress = re.search(r"(\d+)%\s.*", nextline)
if progress:
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self.UIqueue[index]['progress'] = progress.group(1) + ' %'
# process returncode
check = p.returncode
calibre_traceback = p.stderr.readlines()
for ele in calibre_traceback:
if sys.version_info < (3, 0):
ele = ele.decode('utf-8')
log.debug(ele.strip('\n'))
if not ele.startswith('Traceback') and not ele.startswith(' File'):
error_message = "Calibre failed with error: %s" % ele.strip('\n')
# kindlegen returncodes
# 0 = Info(prcgen):I1036: Mobi file built successfully
# 1 = Info(prcgen):I1037: Mobi file built with WARNINGS!
# 2 = Info(prcgen):I1038: MOBI file could not be generated because of errors!
if (check < 2 and config.config_ebookconverter == 1) or \
(check == 0 and config.config_ebookconverter == 2):
cur_book = db.session.query(db.Books).filter(db.Books.id == bookid).first()
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if os.path.isfile(file_path + format_new_ext):
new_format = db.Data(name=cur_book.data[0].name,
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book_format=self.queue[index]['settings']['new_book_format'].upper(),
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book=bookid, uncompressed_size=os.path.getsize(file_path + format_new_ext))
cur_book.data.append(new_format)
db.session.commit()
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self.queue[index]['path'] = cur_book.path
self.queue[index]['title'] = cur_book.title
if config.config_use_google_drive:
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os.remove(file_path + format_old_ext)
self._handleSuccess()
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return file_path + format_new_ext
else:
error_message = format_new_ext.upper() + ' format not found on disk'
log.info("ebook converter failed with error while converting book")
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if not error_message:
error_message = 'Ebook converter failed with unknown error'
self._handleError(error_message)
return
def add_convert(self, file_path, bookid, user_name, taskMessage, settings, kindle_mail=None):
self.doLock.acquire()
if self.last >= 20:
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self._delete_completed_tasks()
# progress, runtime, and status = 0
self.id += 1
task = TASK_CONVERT_ANY
if kindle_mail:
task = TASK_CONVERT
self.queue.append({'file_path':file_path, 'bookid':bookid, 'starttime': 0, 'kindle': kindle_mail,
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'taskType': task, 'settings':settings})
self.UIqueue.append({'user': user_name, 'formStarttime': '', 'progress': " 0 %", 'taskMess': taskMessage,
'runtime': '0 s', 'stat': STAT_WAITING,'id': self.id, 'taskType': task } )
self.last=len(self.queue)
self.doLock.release()
def add_email(self, subject, filepath, attachment, settings, recipient, user_name, taskMessage,
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text):
# if more than 20 entries in the list, clean the list
self.doLock.acquire()
if self.last >= 20:
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self._delete_completed_tasks()
# progress, runtime, and status = 0
self.id += 1
self.queue.append({'subject':subject, 'attachment':attachment, 'filepath':filepath,
'settings':settings, 'recipent':recipient, 'starttime': 0,
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'taskType': TASK_EMAIL, 'text':text})
self.UIqueue.append({'user': user_name, 'formStarttime': '', 'progress': " 0 %", 'taskMess': taskMessage,
'runtime': '0 s', 'stat': STAT_WAITING,'id': self.id, 'taskType': TASK_EMAIL })
self.last=len(self.queue)
self.doLock.release()
def add_upload(self, user_name, taskMessage):
# if more than 20 entries in the list, clean the list
self.doLock.acquire()
if self.last >= 20:
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self._delete_completed_tasks()
# progress=100%, runtime=0, and status finished
log.debug("Last " + str(self.last))
log.debug("Current " + str(self.current))
log.debug("id" + str(self.id))
self.id += 1
starttime = datetime.now()
self.queue.append({'starttime': starttime, 'taskType': TASK_UPLOAD})
self.UIqueue.append({'user': user_name, 'formStarttime': starttime, 'progress': "100 %", 'taskMess': taskMessage,
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'runtime': '0 s', 'stat': STAT_FINISH_SUCCESS,'id': self.id, 'taskType': TASK_UPLOAD})
self.last=len(self.queue)
self.doLock.release()
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def _send_raw_email(self):
self.doLock.acquire()
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index = self.current
self.doLock.release()
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self.queue[index]['starttime'] = datetime.now()
self.UIqueue[index]['formStarttime'] = self.queue[index]['starttime']
self.UIqueue[index]['stat'] = STAT_STARTED
obj=self.queue[index]
# create MIME message
msg = MIMEMultipart()
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msg['Subject'] = self.queue[index]['subject']
msg['Message-Id'] = make_msgid('calibre-web')
msg['Date'] = formatdate(localtime=True)
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text = self.queue[index]['text']
msg.attach(MIMEText(text.encode('UTF-8'), 'plain', 'UTF-8'))
if obj['attachment']:
result = get_attachment(obj['filepath'], obj['attachment'])
if result:
msg.attach(result)
else:
self._handleError(u"Attachment not found")
return
msg['From'] = obj['settings']["mail_from"]
msg['To'] = obj['recipent']
use_ssl = int(obj['settings'].get('mail_use_ssl', 0))
try:
# convert MIME message to string
fp = StringIO()
gen = Generator(fp, mangle_from_=False)
gen.flatten(msg)
msg = fp.getvalue()
# send email
timeout = 600 # set timeout to 5mins
# redirect output to logfile on python2 pn python3 debugoutput is caught with overwritten
# _print_debug function
if sys.version_info < (3, 0):
org_smtpstderr = smtplib.stderr
smtplib.stderr = logger.StderrLogger('worker.smtp')
if use_ssl == 2:
self.asyncSMTP = email_SSL(obj['settings']["mail_server"], obj['settings']["mail_port"], timeout=timeout)
else:
self.asyncSMTP = email(obj['settings']["mail_server"], obj['settings']["mail_port"], timeout=timeout)
# link to logginglevel
if logger.is_debug_enabled():
self.asyncSMTP.set_debuglevel(1)
if use_ssl == 1:
self.asyncSMTP.starttls()
if obj['settings']["mail_password"]:
self.asyncSMTP.login(str(obj['settings']["mail_login"]), str(obj['settings']["mail_password"]))
self.asyncSMTP.sendmail(obj['settings']["mail_from"], obj['recipent'], msg)
self.asyncSMTP.quit()
self._handleSuccess()
if sys.version_info < (3, 0):
smtplib.stderr = org_smtpstderr
except (MemoryError) as e:
self._handleError(u'Error sending email: ' + e.message)
return None
except (smtplib.SMTPException, smtplib.SMTPAuthenticationError) as e:
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if hasattr(e, "smtp_error"):
text = e.smtp_error.decode('utf-8').replace("\n",'. ')
elif hasattr(e, "message"):
text = e.message
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else:
text = ''
self._handleError(u'Error sending email: ' + text)
return None
except (socket.error) as e:
self._handleError(u'Error sending email: ' + e.strerror)
return None
def _handleError(self, error_message):
log.error(error_message)
self.doLock.acquire()
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index = self.current
self.doLock.release()
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self.UIqueue[index]['stat'] = STAT_FAIL
self.UIqueue[index]['progress'] = "100 %"
self.UIqueue[index]['formRuntime'] = datetime.now() - self.queue[index]['starttime']
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self.UIqueue[index]['message'] = error_message
def _handleSuccess(self):
self.doLock.acquire()
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index = self.current
self.doLock.release()
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self.UIqueue[index]['stat'] = STAT_FINISH_SUCCESS
self.UIqueue[index]['progress'] = "100 %"
self.UIqueue[index]['formRuntime'] = datetime.now() - self.queue[index]['starttime']
_worker = WorkerThread()
_worker.start()
def get_taskstatus():
return _worker.get_taskstatus()
def add_email(subject, filepath, attachment, settings, recipient, user_name, taskMessage, text):
return _worker.add_email(subject, filepath, attachment, settings, recipient, user_name, taskMessage, text)
def add_upload(user_name, taskMessage):
return _worker.add_upload(user_name, taskMessage)
def add_convert(file_path, bookid, user_name, taskMessage, settings, kindle_mail=None):
return _worker.add_convert(file_path, bookid, user_name, taskMessage, settings, kindle_mail)