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  1. import http.client as http
  2. import queue
  3.  
  4. import os
  5. import json
  6. import time
  7. import threading
  8.  
  9. from datetime import datetime
  10.  
  11.  
  12. NETWORK_ERRORS = http.HTTPException, ConnectionError, OSError
  13.  
  14. BOARD_URL = '2ch.hk'
  15. CATALOG_URL = '/{}/catalog.json'
  16. THREAD_URL = '/{}/res/{}.json'
  17. RESOURCE_URL = '/{}/{}'
  18. DEFAULT_SECTION = 'b'
  19. FILE_FOLDER = 'files'
  20. HEADERS = {
  21.     'User-Agent': "Mozilla/5.0 (Windows NT 6.3; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0",
  22.     'Accept-Charset': 'utf-8',
  23. }
  24.  
  25. QUERY = r'(webm | цуиь | шebm | wbem)'
  26. WEBM = 6
  27.  
  28.  
  29. DOWNLOADERS = 2
  30. SEARCHERS = 2
  31. STOP_SIGNAL = (None, None, None)
  32. VERBOSITY_LEVEL = 2
  33. INFO, WARNING, ERROR = 3, 2, 1
  34.  
  35.  
  36. def inform(msg, level=10):
  37.  
  38.     if level <= VERBOSITY_LEVEL:
  39.         inform(level)
  40.  
  41.  
  42. class Connection(object):
  43.  
  44.     def __init__(self, host=BOARD_URL):
  45.         self._host = host
  46.         self._connect()
  47.  
  48.     def _repeat_on(exceptions):
  49.         def _repeat_on_error(function):
  50.             def _f(self, *args, **kwargs):
  51.                 while True:
  52.                     try:
  53.                         return function(self, *args, **kwargs)
  54.                     except exceptions as e:
  55.                         inform(e, level=2)
  56.                         self._connect()
  57.                         time.sleep(1)
  58.             return _f
  59.         return _repeat_on_error
  60.  
  61.     @_repeat_on(NETWORK_ERRORS)
  62.     def _connect(self):
  63.         self._conn = http.HTTPSConnection(self._host)
  64.         self._set_headers()
  65.         inform('Connected to {}'.format(self._host))
  66.  
  67.     def _set_cookie(self):
  68.         resp = self.get_response('/')
  69.         self._headers['Cookie'] = resp.getheader('set-cookie')
  70.         resp.read()
  71.  
  72.     def _set_headers(self):
  73.         self._headers = HEADERS
  74.  
  75.     def _get_response(self, request):
  76.         # inform('Requesting {}'.format(request))
  77.         self._conn.request('GET', request, headers=self._headers)
  78.         resp = self._conn.getresponse()
  79.         # inform('Response is {}: {}'.format(resp.status, resp.reason))
  80.         return resp
  81.  
  82.     @_repeat_on(NETWORK_ERRORS)
  83.     def get_response(self, request):
  84.         return self._get_response(request)
  85.  
  86.     @_repeat_on(TypeError)
  87.     def get_json(self, request):
  88.         json_data = {}
  89.  
  90.         resp = self.get_response(request)
  91.         data = resp.read()
  92.  
  93.         try:
  94.             data = data.decode('utf8')
  95.         except (AttributeError, UnicodeDecodeError):
  96.             pass
  97.  
  98.         if resp.status == 200:
  99.             try:
  100.                 json_data = json.loads(data)
  101.             except ValueError:
  102.                 inform('Cannot decode json')
  103.  
  104.         return resp.status, json_data
  105.  
  106.     @_repeat_on(NETWORK_ERRORS)
  107.     def get_file(self, request):
  108.         return self._get_response(request).read()
  109.  
  110.  
  111. class Thread:
  112.  
  113.     def __init__(self, section, number):
  114.         self._section = section
  115.         self._last_post = 0
  116.         self._url = THREAD_URL.format(section, number)
  117.  
  118.     def get_webms(self, fetch_tool):
  119.         # inform('Searching for webms. Last post: {}'.format(self._last_post))
  120.         webms = []
  121.         status, data = fetch_tool(self._url)
  122.  
  123.         if status == 404:
  124.             return None
  125.         elif status != 200:
  126.             return webms
  127.  
  128.         found_webms_count = 0
  129.  
  130.         for post in data['threads'][0]['posts']:
  131.  
  132.             if post['num'] <= self._last_post:
  133.                 continue
  134.  
  135.             try:
  136.                 files = post['files']
  137.             except KeyError:
  138.                 continue
  139.  
  140.             for f in files:
  141.                 if f.get('type', None) == WEBM:
  142.                     found_webms_count += 1
  143.                     webm = RESOURCE_URL.format(self._section, f['path'])
  144.                     thumb = RESOURCE_URL.format(self._section, f['thumbnail'])
  145.                     md5 = f['md5']
  146.                     webms.append((webm, thumb, md5))
  147.  
  148.         inform('Found {} webms'.format(found_webms_count))
  149.         self._last_post = data['threads'][0]['posts'][-1]['num']
  150.         return webms
  151.  
  152.     def __str__(self):
  153.         return self._url
  154.  
  155.  
  156. class Catalog:
  157.  
  158.     def __init__(self, section):
  159.  
  160.         self._url = CATALOG_URL.format(section)
  161.         self._section = section
  162.         self._threads = set()
  163.  
  164.     def get_threads(self, fetch_tool):
  165.         alive_threads = set()
  166.         result = []
  167.         status, data = fetch_tool(self._url)
  168.  
  169.         if status != 200:
  170.             return result
  171.  
  172.         try:
  173.             threads = data['threads']
  174.         except KeyError as e:
  175.             inform(e, threads.keys(), self._url, level=2)
  176.             return result
  177.  
  178.         for thread in threads:
  179.             number = int(thread['num'])
  180.             if number not in self._threads:
  181.                 result.append(Thread(self._section, number))
  182.                 self._threads.add(number)
  183.  
  184.             alive_threads.add(number)
  185.  
  186.         inform('Found {} threads'.format(len(result)))
  187.         self._threads = alive_threads
  188.         return result
  189.  
  190.     def __str__(self):
  191.         return self._url
  192.  
  193.  
  194. def except_key_interrupt(function):
  195.     def _f(self):
  196.         try:
  197.             return function(self)
  198.         except (KeyboardInterrupt, SystemExit):
  199.             return
  200.  
  201.     return _f
  202.  
  203.  
  204. class Searcher(Connection):
  205.  
  206.     def __init__(self, lock, thread_Q, file_Q):
  207.         self._lock = lock
  208.         self._thread_Q = thread_Q
  209.         self._file_Q = file_Q
  210.  
  211.         super().__init__()
  212.  
  213.     @except_key_interrupt
  214.     def work(self):
  215.         while True:
  216.             thread = self._thread_Q.get()
  217.             if thread == STOP_SIGNAL:
  218.                 return
  219.  
  220.             webms = thread.get_webms(self.get_json)
  221.             if webms is not None:
  222.                 [self._file_Q.put(w) for w in webms]
  223.                 self._thread_Q.put(thread)
  224.  
  225.  
  226. class Downloader(Connection):
  227.  
  228.     def __init__(self, lock, file_Q, log_Q=None, webms=False):
  229.         self._lock = lock
  230.         self._file_Q = file_Q
  231.         self._log_Q = log_Q
  232.         self._webms = webms
  233.  
  234.         super().__init__()
  235.  
  236.     def _log(self, data):
  237.         if not self._log_Q:
  238.             return
  239.  
  240.         with self._lock:
  241.             self._log_Q.put(';'.join(data))
  242.  
  243.     def _download(self, data):
  244.         webm, thumb, md5 = data
  245.         filename, webm_file, thumb_file = None, None, None
  246.  
  247.         if self._webms:
  248.             webm_file = self.get_file(webm)
  249.  
  250.         thumb_file = self.get_file(thumb)
  251.         filename = os.path.realpath(thumb).split(os.sep)[-1].split('.')[0]
  252.  
  253.         return filename, webm_file, thumb_file
  254.  
  255.     def work(self, callback=lambda *args: None):
  256.         while True:
  257.             data = self._file_Q.get()
  258.             if data == STOP_SIGNAL:
  259.                 return
  260.  
  261.             filename, webm, thumb = self._download(data)
  262.             self._log(data)
  263.  
  264.             callback(filename, webm, thumb)
  265.  
  266.  
  267. class Logger:
  268.  
  269.     def __init__(self, lock, log):
  270.         self._lock = lock
  271.         self._log = log
  272.         self._time = time.time()
  273.         self._wait_time = 5 * 1
  274.         self._file = open(datetime.now().strftime('%Y %m %d %H:%M'), 'w')
  275.  
  276.     def work(self):
  277.         while True:
  278.             time.sleep(2)
  279.             t = time.time()
  280.             if t - self._time > self._wait_time:
  281.                 self._time = t
  282.                 with self._lock:
  283.                     inform('Writing')
  284.                     lines = []
  285.                     while not self._log.empty():
  286.                         lines.append(self._log.get())
  287.                     self._file.write(
  288.                         '%s\n' % '\n'.join([str(each) for each in lines]))
  289.  
  290.     def __del__(self):
  291.         self._file.close()
  292.  
  293.  
  294. class MainWorker(Connection):
  295.  
  296.     def __init__(self, sections, searcher=Searcher, downloader=Downloader):
  297.         self._lock = threading.RLock()
  298.         self._thread_Q = queue.Queue()
  299.         self._file_Q = queue.Queue()
  300.         self._log_Q = queue.Queue()
  301.  
  302.         self._Searcher = searcher
  303.         self._Downloader = downloader
  304.  
  305.         self.catalogs = [Catalog(section) for section in sections]
  306.  
  307.         super().__init__()
  308.  
  309.     def _start_workers(self):
  310.         for _ in range(SEARCHERS):
  311.             s = self._Searcher(self._lock, self._thread_Q, self._file_Q)
  312.             t = threading.Thread(target=s.work)
  313.             t.start()
  314.  
  315.         for _ in range(DOWNLOADERS):
  316.             d = self._Downloader(
  317.                 self._lock, self._file_Q, self._log_Q, webms=False)
  318.             t = threading.Thread(target=d.work)
  319.             t.start()
  320.  
  321.         logger = Logger(self._lock, self._log_Q)
  322.         threading.Thread(target=logger.work).start()
  323.  
  324.     def _exit(self):
  325.         for _ in range(DOWNLOADERS + SEARCHERS):
  326.             self._file_Q.put(STOP_SIGNAL)
  327.             self._thread_Q.put(STOP_SIGNAL)
  328.  
  329.     def work(self):
  330.         try:
  331.             self._start_workers()
  332.             while True:
  333.                 for catalog in self.catalogs:
  334.                     [self._thread_Q.put(t)
  335.                      for t in catalog.get_threads(self.get_json)]
  336.                 time.sleep(5)
  337.         except (KeyboardInterrupt, SystemExit):
  338.             self._exit()
  339.  
  340.  
  341. if __name__ == '__main__':
  342.     sections = ['vg', 'b', 'a', 'mov']
  343.     main_worker = MainWorker(sections)
  344.     main_worker.work()
  345.  
  346.  
Time limit exceeded #stdin #stdout 5s 51504KB
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https://ideone.com/gnMLdU
language:
Python 3 (python  3.9.5)
created:
9 years ago
visibility:
public

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