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  1. # -*- coding: utf-8 -*-
  2.  
  3. import time
  4. import thread
  5. import urllib2
  6. import logging
  7.  
  8. import lxml.html
  9.  
  10. good_key_in_url = 'profile|search|user'
  11. bad_key_in_url = 'Hello|2ch|ororo'
  12. timeout = 10
  13. max_threads = 100
  14. first_url = 'http://content-available-to-author-only.ru'
  15.  
  16. out = []
  17. received_page = []
  18. path = {'path_to_all_links': ".//*/a/@href"}
  19. logging.basicConfig(
  20.     level=logging.INFO, format='%(asctime)s - %(levelname)s - %(message)s')
  21.  
  22. def worker(myID, url):
  23.     global out
  24.     global received_page
  25.  
  26.     mutex.acquire()
  27.     logging.info('%s | %s' % ('get', url))
  28.     mutex.release()
  29.  
  30.     try:
  31.         # Get HTML page
  32.         page = urllib2.urlopen(url, None, timeout).read()
  33.     except Exception as e:
  34.         mutex.acquire()
  35.         logging.error('%s | %s' % (url, e))
  36.         mutex.release()
  37.     else:
  38.         # Save url for escape loop
  39.         received_page.append(url)
  40.         # ETree object form HTML
  41.         doc = lxml.html.document_fromstring(page)
  42.         # Get all '<a href' links from page
  43.         etree_links = doc.xpath(path['path_to_all_links'])
  44.         if etree_links:
  45.             # Sort links
  46.             for link in etree_links:
  47.                 link = link.encode('utf-8')
  48.                 # Check to link loops
  49.                 if link not in received_page:
  50.                     # Checking for entry key in the url
  51.                     for key in bad_key_in_url:
  52.                         # Bad links
  53.                         if key in link:
  54.                             break
  55.                     else:
  56.                         for key in good_key_in_url:
  57.                             # Good links
  58.                             if key in link:
  59.                                 mutex.acquire()
  60.                                 out.append(link)
  61.                                 mutex.release()
  62.                                 break
  63.  
  64. if __name__ == '__main__':
  65.     good_key_in_url = good_key_in_url.split('|')
  66.     bad_key_in_url = bad_key_in_url.split('|')
  67.     out_file = open('out.txt', 'w')
  68.     mutex = thread.allocate_lock()
  69.     logging.info('run')
  70.  
  71.     i = 0
  72.     out.append(first_url)
  73.     while True:
  74.         if out and len(out) <= max_threads:
  75.             i += 1
  76.             mutex.acquire()
  77.             url = out[0]
  78.             del out[0]
  79.             if url != first_url:
  80.                 out_file.write(url+'\n')
  81.             if len(received_page) > 10000:
  82.                 received_page = []
  83.                 i = 0
  84.             mutex.release()
  85.             thread.start_new_thread(worker, (i, url))
  86.             if thread._count() < 1:
  87.             	time.sleep(5)
  88.         elif thread._count() < 1:
  89.             out_file.close()
  90.             logging.info('exit')
  91.             quit()
Runtime error #stdin #stdout #stderr 0.24s 17120KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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Traceback (most recent call last):
  File "prog.py", line 68, in <module>
IOError: [Errno 13] Permission denied: 'out.txt'
https://ideone.com/8UCZ2w
language:
Python (cpython 2.7.16)
created:
11 years ago
visibility:
public

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