First working PoC with a new task structure
blitzmann
4 years ago
parent
b9c0f2a3d3
commit
f10f0dada6
@ -0,0 +1,209 @@
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from __future__ import division, print_function, unicode_literals
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import sys
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import os
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import re
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import smtplib
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import socket
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import time
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import threading
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try:
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import queue
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except ImportError:
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import Queue as queue
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from glob import glob
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from shutil import copyfile
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from datetime import datetime
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try:
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from StringIO import StringIO
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from email.MIMEBase import MIMEBase
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from email.MIMEMultipart import MIMEMultipart
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from email.MIMEText import MIMEText
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except ImportError:
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from io import StringIO
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from email.mime.base import MIMEBase
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from email.mime.multipart import MIMEMultipart
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from email.mime.text import MIMEText
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from email import encoders
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from email.utils import formatdate
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from email.utils import make_msgid
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from email.generator import Generator
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from flask_babel import gettext as _
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from cps import calibre_db, db
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from cps import logger, config
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from cps.subproc_wrapper import process_open
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from cps import gdriveutils
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from flask_babel import gettext as _
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import abc
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log = logger.create()
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# task 'status' consts
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STAT_WAITING = 0
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STAT_FAIL = 1
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STAT_STARTED = 2
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STAT_FINISH_SUCCESS = 3
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def _get_main_thread():
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for t in threading.enumerate():
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if t.__class__.__name__ == '_MainThread':
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return t
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raise Exception("main thread not found?!")
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class ImprovedQueue(queue.Queue):
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def to_list(self):
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"""
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Returns a copy of all items in the queue without removing them.
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"""
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with self.mutex:
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return list(self.queue)
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#Class for all worker tasks in the background
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class WorkerThread(threading.Thread):
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__instance = None
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@classmethod
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def getInstance(cls):
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if cls._instance is None:
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cls._instance = WorkerThread()
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return cls._instance
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def __init__(self):
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threading.Thread.__init__(self)
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self.finished = list()
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self.db_queue = queue.Queue()
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calibre_db.add_queue(self.db_queue)
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self.doLock = threading.Lock()
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self.queue = ImprovedQueue()
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# todo: figure this stuff out and where it should goes
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self.asyncSMTP = None
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self.start()
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@classmethod
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def add(cls, user, task):
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ins = cls.getInstance()
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ins.queue.put((user, task))
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@property
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def tasks(self):
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with self.doLock:
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tasks = list(self.queue.to_list()) + self.finished
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return tasks # todo: order by data added
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# Main thread loop starting the different tasks
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def run(self):
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main_thread = _get_main_thread()
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while main_thread.is_alive():
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user, item = self.queue.get()
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# add to list so that in-progress tasks show up
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with self.doLock:
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self.finished.append((user, item))
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try:
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item.start(self)
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print(item)
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except Exception as e:
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log.exception(e)
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self.queue.task_done()
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def get_send_status(self):
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raise NotImplementedError
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# if self.asyncSMTP:
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# return self.asyncSMTP.getTransferStatus()
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# else:
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# return "0 %"
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def _delete_completed_tasks(self):
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raise NotImplementedError()
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# for index, task in reversed(list(enumerate(self.UIqueue))):
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# if task['progress'] == "100 %":
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# # delete tasks
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# self.queue.pop(index)
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# self.UIqueue.pop(index)
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# # if we are deleting entries before the current index, adjust the index
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# if index <= self.current and self.current:
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# self.current -= 1
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# self.last = len(self.queue)
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class CalibreTask(metaclass=abc.ABCMeta):
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def __init__(self, message):
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self._progress = 0
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self.stat = STAT_WAITING
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self.error = None
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self.start_time = None
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self.end_time = None
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self.message = message
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@abc.abstractmethod
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def run(self, worker_thread):
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"""Provides the caller some human-readable name for this class"""
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raise NotImplementedError
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@abc.abstractmethod
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def name(self):
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"""Provides the caller some human-readable name for this class"""
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raise NotImplementedError
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def start(self, *args):
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self.start_time = datetime.now()
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self.run(*args)
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self.end_time = datetime.now()
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@property
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def stat(self):
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return self._stat
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@stat.setter
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def stat(self, x):
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self._stat = x
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@property
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def progress(self):
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return self._progress
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@progress.setter
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def progress(self, x):
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# todo: throw error if outside of [0,1]
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self._progress = x
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@property
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def error(self):
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return self._error
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@error.setter
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def error(self, x):
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self._error = x
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@property
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def runtime(self):
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return (self.end_time or datetime.now()) - self.start_time
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@progress.setter
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def progress(self, x):
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# todo: throw error if outside of [0,1]
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self._progress = x
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def _handleError(self, error_message):
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log.error(error_message)
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self.stat = STAT_FAIL
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self.progress = 1
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self.error = error_message
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def _handleSuccess(self):
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self.stat = STAT_FINISH_SUCCESS
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self.progress = 1
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@ -0,0 +1,196 @@
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from __future__ import division, print_function, unicode_literals
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import sys
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import os
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import re
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from glob import glob
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from shutil import copyfile
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from cps.services.worker import CalibreTask
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from cps import calibre_db, db
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from cps import logger, config
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from cps.subproc_wrapper import process_open
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from flask_babel import gettext as _
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log = logger.create()
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class TaskConvert(CalibreTask):
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def __init__(self, file_path, bookid, taskMessage, settings, kindle_mail):
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super().__init__(taskMessage)
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self.file_path = file_path
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self.bookid = bookid
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self.settings = settings
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self.kindle_mail = kindle_mail
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self.results = dict()
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def run(self, worker_thread):
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self.worker_thread = worker_thread
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filename = self._convert_ebook_format()
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# todo: re-enable this (need to set up gdrive to test with)
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# if filename:
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# if config.config_use_google_drive:
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# gdriveutils.updateGdriveCalibreFromLocal()
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# if curr_task == TASK_CONVERT:
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# self.add_email(self.queue[index]['settings']['subject'], self.queue[index]['path'],
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# filename, self.queue[index]['settings'], self.queue[index]['kindle'],
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# self.UIqueue[index]['user'], self.queue[index]['title'],
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# self.queue[index]['settings']['body'], internal=True)
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self._handleSuccess()
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pass
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def _convert_ebook_format(self):
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error_message = None
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file_path = self.file_path
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book_id = self.bookid
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format_old_ext = u'.' + self.settings['old_book_format'].lower()
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format_new_ext = u'.' + self.settings['new_book_format'].lower()
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# check to see if destination format already exists -
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# if it does - mark the conversion task as complete and return a success
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# this will allow send to kindle workflow to continue to work
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if os.path.isfile(file_path + format_new_ext):
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log.info("Book id %d already converted to %s", book_id, format_new_ext)
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cur_book = calibre_db.get_book(book_id)
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self.results['path'] = file_path
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self.results['title'] = cur_book.title
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self._handleSuccess()
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return file_path + format_new_ext
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else:
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log.info("Book id %d - target format of %s does not exist. Moving forward with convert.",
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book_id,
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format_new_ext)
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if config.config_kepubifypath and format_old_ext == '.epub' and format_new_ext == '.kepub':
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check, error_message = self._convert_kepubify(file_path,
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format_old_ext,
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format_new_ext)
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else:
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# check if calibre converter-executable is existing
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if not os.path.exists(config.config_converterpath):
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# ToDo Text is not translated
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self._handleError(_(u"Calibre ebook-convert %(tool)s not found", tool=config.config_converterpath))
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return
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check, error_message = self._convert_calibre(file_path, format_old_ext, format_new_ext)
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if check == 0:
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cur_book = calibre_db.get_book(book_id)
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if os.path.isfile(file_path + format_new_ext):
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# self.db_queue.join()
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new_format = db.Data(name=cur_book.data[0].name,
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book_format=self.settings['new_book_format'].upper(),
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book=book_id, uncompressed_size=os.path.getsize(file_path + format_new_ext))
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# todo: this may not be needed anymore, might be able to access the DB directly now. See #1565
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task = {'task':'add_format','id': book_id, 'format': new_format}
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self.worker_thread.db_queue.put(task)
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# To Do how to handle error?
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'''cur_book.data.append(new_format)
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try:
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# db.session.merge(cur_book)
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calibre_db.session.commit()
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except OperationalError as e:
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calibre_db.session.rollback()
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log.error("Database error: %s", e)
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self._handleError(_(u"Database error: %(error)s.", error=e))
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return'''
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self.results['path'] = cur_book.path
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self.results['title'] = cur_book.title
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if config.config_use_google_drive:
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os.remove(file_path + format_old_ext)
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self._handleSuccess()
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return file_path + format_new_ext
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else:
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error_message = format_new_ext.upper() + ' format not found on disk'
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log.info("ebook converter failed with error while converting book")
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if not error_message:
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error_message = 'Ebook converter failed with unknown error'
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self._handleError(error_message)
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return
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def _convert_kepubify(self, file_path, format_old_ext, format_new_ext):
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quotes = [1, 3]
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command = [config.config_kepubifypath, (file_path + format_old_ext), '-o', os.path.dirname(file_path)]
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try:
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p = process_open(command, quotes)
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except OSError as e:
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return 1, _(u"Kepubify-converter failed: %(error)s", error=e)
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self.progress = 0.01
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while True:
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nextline = p.stdout.readlines()
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nextline = [x.strip('\n') for x in nextline if x != '\n']
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if sys.version_info < (3, 0):
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nextline = [x.decode('utf-8') for x in nextline]
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for line in nextline:
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log.debug(line)
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if p.poll() is not None:
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break
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# ToD Handle
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# process returncode
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check = p.returncode
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# move file
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if check == 0:
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converted_file = glob(os.path.join(os.path.dirname(file_path), "*.kepub.epub"))
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if len(converted_file) == 1:
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copyfile(converted_file[0], (file_path + format_new_ext))
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os.unlink(converted_file[0])
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else:
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return 1, _(u"Converted file not found or more than one file in folder %(folder)s",
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folder=os.path.dirname(file_path))
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return check, None
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def _convert_calibre(self, file_path, format_old_ext, format_new_ext):
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try:
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# Linux py2.7 encode as list without quotes no empty element for parameters
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# linux py3.x no encode and as list without quotes no empty element for parameters
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# windows py2.7 encode as string with quotes empty element for parameters is okay
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# windows py 3.x no encode and as string with quotes empty element for parameters is okay
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# separate handling for windows and linux
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quotes = [1, 2]
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command = [config.config_converterpath, (file_path + format_old_ext),
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(file_path + format_new_ext)]
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quotes_index = 3
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if config.config_calibre:
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parameters = config.config_calibre.split(" ")
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for param in parameters:
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command.append(param)
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quotes.append(quotes_index)
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quotes_index += 1
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p = process_open(command, quotes)
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except OSError as e:
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return 1, _(u"Ebook-converter failed: %(error)s", error=e)
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while p.poll() is None:
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nextline = p.stdout.readline()
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if os.name == 'nt' and sys.version_info < (3, 0):
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nextline = nextline.decode('windows-1252')
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elif os.name == 'posix' and sys.version_info < (3, 0):
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nextline = nextline.decode('utf-8')
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log.debug(nextline.strip('\r\n'))
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# parse progress string from calibre-converter
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progress = re.search(r"(\d+)%\s.*", nextline)
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if progress:
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self.progress = int(progress.group(1)) / 100
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# process returncode
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check = p.returncode
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calibre_traceback = p.stderr.readlines()
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error_message = ""
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for ele in calibre_traceback:
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if sys.version_info < (3, 0):
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ele = ele.decode('utf-8')
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log.debug(ele.strip('\n'))
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if not ele.startswith('Traceback') and not ele.startswith(' File'):
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error_message = "Calibre failed with error: %s" % ele.strip('\n')
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return check, error_message
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@property
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def name(self):
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return "Convert"
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