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main.py
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main.py
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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import re
import sys
from os import listdir, mkdir, path
from time import sleep
from urllib import request
from progressbar import ProgressBar
from threadpool import ThreadPool
th_pool = ThreadPool(max_threads=int(sys.argv[1]) if len(sys.argv) > 1 else 2)
class TaskManager:
tasks_dir = 'tasks'
root_dir = '/home/oem/Видео'
files = []
_tasks = []
def get_all_tasks(self):
self.files = listdir(self.tasks_dir)
def __iter__(self):
return self.get_url()
@staticmethod
def get_name(line):
query_string = request.unquote(line).split('?')[1].split('&')
try:
query_parameters = {key.split('=')[0]: key.split('=')[1] for key in query_string if '=' in key}
except:
print(line)
raise SystemExit
try:
ext = query_parameters['mime'].split('/').pop()
name = re.sub(r'\s+', '_', query_parameters['title'])
except KeyError:
return line.split('?')[0].split('/').pop()
else:
return '{}.{}'.format(name, ext)
def get_url(self):
for i, file in enumerate(self.files, 1):
with open('{}/{}'.format(self.tasks_dir, file), 'r') as f:
links = f.read().split('\n')
download_dir = re.sub(r'\s+', '_', file)
for j, link in enumerate(links, 1):
if link:
filename = self.get_name(link)
else:
continue
url = link
try:
mkdir('{}/{}'.format(self.root_dir, download_dir))
except IOError:
pass
file_path = '{}/{}/{}'.format(self.root_dir, download_dir, filename)
self._tasks.append((url, file_path,))
for i, task in enumerate(self._tasks, 1):
print('Загружаем {} из {}'.format(i, len(self._tasks)))
yield task
class Downloader:
file_size = 0
_error_cache = 'error_cache'
def up(self, size):
self.file_size += size
def down(self, size):
self.file_size -= size
@staticmethod
def get_url_size(url):
try:
file = request.urlopen(url)
return file.length
except Exception as e:
print(e)
return 0
@th_pool.thread
def download(self, file_path: str, url: str):
th_pool.lock.acquire()
file_size = self.get_url_size(url=url)
self.up(file_size)
th_pool.lock.release()
messages = {False: '\nЗагрузка файла {} завершена', True: '\nПри загрузке файла {} возникло исключение с сообщением: {}'}
error = None
print('\nЗагрузка файла {} начата'.format(file_path))
try:
if file_size == 0:
raise Exception('Не удалось получить размер файла!')
request.urlretrieve(url=url, filename=file_path)
except Exception as e:
error = e
with open(self._error_cache, 'a') as f:
f.write('{}\n'.format(url))
finally:
print(messages[bool(error)].format(file_path, error))
th_pool.lock.acquire()
self.down(file_size)
th_pool.lock.release()
return
class ProgressManager(ProgressBar):
downloads = {}
enabled = False
def re_init(self, max_size):
super().__init__(max_value=max_size, min_value=0)
cur_size = 0
@staticmethod
def get_file_size(self, filename):
try:
if path.exists(filename):
return path.getsize(filename)
except Exception:
return 0
@th_pool.thread
def view_progress(self):
while self.enabled:
try:
max_size = downloader.file_size
cur_size = 0
for thread in th_pool.pool:
try:
file_path = thread._kwargs['file_path']
except Exception:
continue
cur_size += self.get_file_size(file_path)
if max_size != self.max_value:
self.re_init(max_size)
if cur_size != self.cur_size:
self.update(cur_size)
self.cur_size = cur_size
except Exception:
continue
return
tasks = TaskManager()
downloader = Downloader()
progress = ProgressManager()
tasks.get_all_tasks()
progress.enabled = True
progress.view_progress()
for url, filename in tasks:
downloader.download(file_path=filename, url=url)
if th_pool.cur_count == th_pool.MAX_THREADS:
while th_pool.cur_count != 1:
sleep(1)
while th_pool.cur_count != 1:
sleep(1)
progress.enabled = False