calibre-web/cps/worker.py
OzzieIsaacs d414bf3263 Massadd of books to shelfs (#203, #404) from advanced search
Code cosmetics
bugfix error message on failed emails
refactored language name generation
2018-08-19 10:14:20 +02:00

457 lines
18 KiB
Python

#!/usr/bin/env python
# -*- coding: utf-8 -*-
from __future__ import print_function
import smtplib
import threading
from datetime import datetime
import logging
import time
import socket
import sys
import os
from email.generator import Generator
import web
from flask_babel import gettext as _
import re
import gdriveutils as gd
import subprocess
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
chunksize = 8192
STAT_WAITING = 0
STAT_FAIL = 1
STAT_STARTED = 2
STAT_FINISH_SUCCESS = 3
TASK_EMAIL = 1
TASK_CONVERT = 2
TASK_UPLOAD = 3
RET_FAIL = 0
RET_SUCCESS = 1
# 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 = web.config.config_calibre_dir
if web.ub.config.config_use_google_drive:
df = gd.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:
web.app.logger.exception(e) # traceback.print_exc()
web.app.logger.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
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."""
if self.debuglevel > 0:
print('send:', repr(strg), file=sys.stderr)
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 type(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')
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 %"
# 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):
self._stopevent = threading.Event()
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
# Main thread loop starting the different tasks
def run(self):
while not self._stopevent.isSet():
doLock = threading.Lock()
doLock.acquire()
if self.current != self.last:
doLock.release()
if self.queue[self.current]['typ'] == TASK_EMAIL:
self.send_raw_email()
if self.queue[self.current]['typ'] == TASK_CONVERT:
self.convert_mobi()
# TASK_UPLOAD is handled implicitly
self.current += 1
else:
doLock.release()
time.sleep(1)
def stop(self):
self._stopevent.set()
def get_send_status(self):
if self.asyncSMTP:
return self.asyncSMTP.getTransferStatus()
else:
return "0 %"
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
self.current -= 1
self.last = len(self.queue)
def get_taskstatus(self):
if self.current < len(self.queue):
if self.queue[self.current]['status'] == STAT_STARTED:
if not self.queue[self.current]['typ'] == TASK_CONVERT:
self.UIqueue[self.current]['progress'] = self.get_send_status()
self.UIqueue[self.current]['runtime'] = self._formatRuntime(
datetime.now() - self.queue[self.current]['starttime'])
return self.UIqueue
def convert_mobi(self):
# convert book, and upload in case of google drive
self.queue[self.current]['status'] = STAT_STARTED
self.UIqueue[self.current]['status'] = _('Started')
self.queue[self.current]['starttime'] = datetime.now()
self.UIqueue[self.current]['formStarttime'] = self.queue[self.current]['starttime']
filename=self.convert()
if web.ub.config.config_use_google_drive:
gd.updateGdriveCalibreFromLocal()
if(filename):
self.add_email(_(u'Send to Kindle'), self.queue[self.current]['path'], filename,
self.queue[self.current]['settings'], self.queue[self.current]['kindle'],
self.UIqueue[self.current]['user'], _(u"E-Mail: %s" % self.queue[self.current]['title']))
def convert(self):
error_message = None
file_path = self.queue[self.current]['file_path']
bookid = self.queue[self.current]['bookid']
# check if converter-excecutable is existing
if not os.path.exists(web.ub.config.config_converterpath):
self._handleError(_(u"Convertertool %(converter)s not found", converter=web.ub.config.config_converterpath))
return
try:
# check which converter to use kindlegen is "1"
if web.ub.config.config_ebookconverter == 1:
command = [web.ub.config.config_converterpath, u'"' + file_path + u'.epub"']
else:
command = [web.ub.config.config_converterpath, '"' + file_path + u'.epub"',
'"'+file_path + u'.mobi"']
if web.ub.config.config_calibre:
command.append(web.ub.config.config_calibre)
# special handling for windows
if os.name == 'nt':
command = ' '.join(command)
if sys.version_info < (3, 0):
command = command.encode(sys.getfilesystemencoding())
p = subprocess.Popen(command, stdout=subprocess.PIPE, universal_newlines=True)
except OSError as e:
self._handleError(_(u"Ebook-converter failed: %s" % e))
return
if web.ub.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(".*\(.*\):(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())
web.app.logger.debug("convert_kindlegen: " + 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')
web.app.logger.debug(nextline.strip('\r\n'))
# parse progress string from calibre-converter
progress = re.search("(\d+)%\s.*", nextline)
if progress:
self.UIqueue[self.current]['progress'] = progress.group(1) + ' %'
#process returncode
check = p.returncode
# 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 web.ub.config.config_ebookconverter == 1) or \
(check == 0 and web.ub.config.config_ebookconverter == 2):
cur_book = web.db.session.query(web.db.Books).filter(web.db.Books.id == bookid).first()
new_format = web.db.Data(name=cur_book.data[0].name,book_format="MOBI",
book=bookid,uncompressed_size=os.path.getsize(file_path + ".mobi"))
cur_book.data.append(new_format)
web.db.session.commit()
self.queue[self.current]['path'] = cur_book.path
self.queue[self.current]['title'] = cur_book.title
if web.ub.config.config_use_google_drive:
os.remove(file_path + u".epub")
self.queue[self.current]['status'] = STAT_FINISH_SUCCESS
self.UIqueue[self.current]['status'] = _('Finished')
self.UIqueue[self.current]['progress'] = "100 %"
self.UIqueue[self.current]['runtime'] = self._formatRuntime(
datetime.now() - self.queue[self.current]['starttime'])
return file_path + ".mobi"
else:
web.app.logger.info("ebook converter failed with error while converting book")
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, typ, settings, kindle_mail):
addLock = threading.Lock()
addLock.acquire()
if self.last >= 20:
self.delete_completed_tasks()
# progress, runtime, and status = 0
self.id += 1
self.queue.append({'file_path':file_path, 'bookid':bookid, 'starttime': 0, 'kindle':kindle_mail,
'status': STAT_WAITING, 'typ': TASK_CONVERT, 'settings':settings})
self.UIqueue.append({'user': user_name, 'formStarttime': '', 'progress': " 0 %", 'type': typ,
'runtime': '0 s', 'status': _('Waiting'),'id': self.id } )
self.id += 1
self.last=len(self.queue)
addLock.release()
def add_email(self, subject, filepath, attachment, settings, recipient, user_name, typ):
# if more than 20 entries in the list, clean the list
addLock = threading.Lock()
addLock.acquire()
if self.last >= 20:
self.delete_completed_tasks()
# progress, runtime, and status = 0
self.queue.append({'subject':subject, 'attachment':attachment, 'filepath':filepath,
'settings':settings, 'recipent':recipient, 'starttime': 0,
'status': STAT_WAITING, 'typ': TASK_EMAIL})
self.UIqueue.append({'user': user_name, 'formStarttime': '', 'progress': " 0 %", 'type': typ,
'runtime': '0 s', 'status': _('Waiting'),'id': self.id })
self.id += 1
self.last=len(self.queue)
addLock.release()
def add_upload(self, user_name, typ):
# if more than 20 entries in the list, clean the list
addLock = threading.Lock()
addLock.acquire()
if self.last >= 20:
self.delete_completed_tasks()
# progress=100%, runtime=0, and status finished
self.queue.append({'starttime': datetime.now(), 'status': STAT_FINISH_SUCCESS, 'typ': TASK_UPLOAD})
self.UIqueue.append({'user': user_name, 'formStarttime': '', 'progress': "100 %", 'type': typ,
'runtime': '0 s', 'status': _('Finished'),'id': self.id })
self.UIqueue[self.current]['formStarttime'] = self.queue[self.current]['starttime']
self.id += 1
self.last=len(self.queue)
addLock.release()
def send_raw_email(self):
self.queue[self.current]['starttime'] = datetime.now()
self.UIqueue[self.current]['formStarttime'] = self.queue[self.current]['starttime']
self.queue[self.current]['status'] = STAT_STARTED
self.UIqueue[self.current]['status'] = _('Started')
obj=self.queue[self.current]
# create MIME message
msg = MIMEMultipart()
msg['Subject'] = self.queue[self.current]['subject']
msg['Message-Id'] = make_msgid('calibre-web')
msg['Date'] = formatdate(localtime=True)
text = _(u'This email has been sent via calibre web.')
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))
# convert MIME message to string
fp = StringIO()
gen = Generator(fp, mangle_from_=False)
gen.flatten(msg)
msg = fp.getvalue()
# send email
try:
timeout = 600 # set timeout to 5mins
org_stderr = sys.stderr
sys.stderr = StderrLogger()
if use_ssl == 2:
self.asyncSMTP = email_SSL(obj['settings']["mail_server"], obj['settings']["mail_port"], timeout)
else:
self.asyncSMTP = email(obj['settings']["mail_server"], obj['settings']["mail_port"], timeout)
# link to logginglevel
if web.ub.config.config_log_level != logging.DEBUG:
self.asyncSMTP.set_debuglevel(0)
else:
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.queue[self.current]['status'] = STAT_FINISH_SUCCESS
self.UIqueue[self.current]['status'] = _('Finished')
self.UIqueue[self.current]['progress'] = "100 %"
self.UIqueue[self.current]['runtime'] = self._formatRuntime(
datetime.now() - self.queue[self.current]['starttime'])
sys.stderr = org_stderr
except (socket.error, smtplib.SMTPRecipientsRefused, smtplib.SMTPException) as e:
self._handleError(e)
return None
def _formatRuntime(self, runtime):
self.UIqueue[self.current]['rt'] = runtime.total_seconds()
val = re.split('\:|\.', str(runtime))[0:3]
erg = list()
for v in val:
if int(v) > 0:
erg.append(v)
retVal = (':'.join(erg)).lstrip('0') + ' s'
if retVal == ' s':
retVal = '0 s'
return retVal
def _handleError(self, error_message):
web.app.logger.error(error_message)
self.queue[self.current]['status'] = STAT_FAIL
self.UIqueue[self.current]['status'] = _('Failed')
self.UIqueue[self.current]['progress'] = "100 %"
self.UIqueue[self.current]['runtime'] = self._formatRuntime(
datetime.now() - self.queue[self.current]['starttime'])
self.UIqueue[self.current]['message'] = error_message
class StderrLogger(object):
buffer = ''
def __init__(self):
self.logger = web.app.logger
def write(self, message):
if message == '\n':
self.logger.debug(self.buffer)
print(self.buffer)
self.buffer = ''
else:
self.buffer += message