<s> import sys <EOL> import threading <EOL> import sqlite3 <EOL> import time <EOL> import urllib2 <EOL> import os <EOL> import hashlib <EOL> import signal <EOL> import Queue <EOL> NUM_THREAD = <NUM_LIT:20> <EOL> work_queue_lock = threading . Lock ( ) <EOL> update_database_lock = threading . Lock ( ) <EOL> class Downloader ( threading . Thread ) : <EOL> def __init__ ( self , work_queue , output_dir , database_filepath ) : <EOL> threading . Thread . __init__ ( self ) <EOL> self . exit_event = threading . Event ( ) <EOL> self . work_queue = work_queue <EOL> self . proxies = None <EOL> self . output_dir = output_dir <EOL> self . current_file_size = <NUM_LIT:0> <EOL> self . file_size = <NUM_LIT:0> <EOL> self . database_filepath = database_filepath <EOL> def exit ( self ) : <EOL> print ( "<STR_LIT>" % self . getName ( ) ) <EOL> self . exit_event . set ( ) <EOL> self . join ( ) <EOL> return self . report ( ) <EOL> def report ( self ) : <EOL> if self . file_size == <NUM_LIT:0> : <EOL> return <NUM_LIT:0> <EOL> return float ( self . current_file_size ) / self . file_size <EOL> def run ( self ) : <EOL> while not self . exit_event . isSet ( ) : <EOL> work_queue_lock . acquire ( ) <EOL> if not self . work_queue . empty ( ) : <EOL> self . url = self . work_queue . get ( ) <EOL> work_queue_lock . release ( ) <EOL> try : <EOL> self . download ( ) <EOL> self . save ( ) <EOL> self . update_database ( ) <EOL> except urllib2 . HTTPError : <EOL> self . update_database ( - <NUM_LIT:1> ) <EOL> else : <EOL> work_queue_lock . release ( ) <EOL> print ( "<STR_LIT>" % self . getName ( ) ) <EOL> def download ( self ) : <EOL> print ( "<STR_LIT>" % ( self . getName ( ) , self . url ) ) <EOL> self . current_file_size = <NUM_LIT:0> <EOL> self . file_size = <NUM_LIT:0> <EOL> proxy_handler = urllib2 . ProxyHandler ( ) <EOL> if ( self . proxies ) : <EOL> proxy_handler = urllib2 . proxyHandler ( self . proxies ) ; <EOL> opener = urllib2 . build_opener ( proxy_handler ) <EOL> opener . addheaders = [ <EOL> ( '<STR_LIT>' , r"<STR_LIT>" <EOL> "<STR_LIT>" ) , <EOL> ( '<STR_LIT>' , self . url ) <EOL> ] <EOL> urllib2 . install_opener ( opener ) <EOL> opening = urllib2 . urlopen ( self . url ) <EOL> meta = opening . info ( ) <EOL> self . file_size = int ( meta . getheaders ( "<STR_LIT>" ) [ <NUM_LIT:0> ] ) <EOL> temp_file_name = "<STR_LIT>" % ( time . time ( ) * <NUM_LIT> ) <EOL> temp_dir = self . output_dir + os . sep + "<STR_LIT>" <EOL> self . temp_output_path = temp_dir + os . sep + temp_file_name <EOL> with open ( self . temp_output_path , '<STR_LIT:wb>' ) as fil : <EOL> block_size = <NUM_LIT> <EOL> while True : <EOL> buf = opening . read ( block_size ) <EOL> self . current_file_size += len ( buf ) <EOL> fil . write ( buf ) <EOL> if not buf : <EOL> break <EOL> def save ( self ) : <EOL> with open ( self . temp_output_path , '<STR_LIT:r>' ) as fil : <EOL> m = hashlib . md5 ( ) <EOL> m . update ( fil . read ( ) ) <EOL> md5_digest = m . hexdigest ( ) <EOL> new_output_path = self . output_dir + os . sep + md5_digest + "<STR_LIT>" <EOL> if os . path . isfile ( new_output_path ) : <EOL> os . remove ( new_output_path ) <EOL> os . rename ( self . temp_output_path , new_output_path ) <EOL> print ( "<STR_LIT>" % ( self . getName ( ) , md5_digest ) ) <EOL> def update_database ( self , result = <NUM_LIT:1> ) : <EOL> update_database_lock . acquire ( ) <EOL> try : <EOL> connection = sqlite3 . connect ( self . database_filepath ) <EOL> cursor = connection . cursor ( ) <EOL> cursor . execute ( '<STR_LIT>' , <EOL> ( result , self . url , ) ) <EOL> connection . commit ( ) <EOL> except sqlite3 . OperationalError : <EOL> print ( "<STR_LIT>" % ( self . getName ( ) ) ) <EOL> finally : <EOL> connection . close ( ) <EOL> update_database_lock . release ( ) <EOL> class Monitor ( threading . Thread ) : <EOL> def __init__ ( self , threads ) : <EOL> threading . Thread . __init__ ( self ) <EOL> self . threads = threads <EOL> self . exit_event = threading . Event ( ) <EOL> def exit ( self ) : <EOL> self . exit_event . set ( ) <EOL> self . join ( ) <EOL> def run ( self ) : <EOL> while not self . exit_event . isSet ( ) : <EOL> for t in self . threads : <EOL> if t . report ( ) == <NUM_LIT:0> : <EOL> print ( "<STR_LIT>" ) , <EOL> else : <EOL> print ( "<STR_LIT>" % ( t . report ( ) * <NUM_LIT:100> ) ) , <EOL> print ( "<STR_LIT>" ) <EOL> time . sleep ( <NUM_LIT:1> ) <EOL> def get_undownloaded_url ( database_filepath ) : <EOL> undownloaded_urls = [ ] <EOL> try : <EOL> connection = sqlite3 . connect ( database_filepath ) <EOL> cursor = connection . cursor ( ) <EOL> sql = "<STR_LIT>" <EOL> cursor . execute ( sql ) <EOL> records = cursor . fetchall ( ) <EOL> undownloaded_urls = [ r [ <NUM_LIT:1> ] for r in records ] <EOL> except sqlite3 . OperationalError : <EOL> print ( "<STR_LIT>" ) <EOL> finally : <EOL> connection . close ( ) <EOL> return undownloaded_urls <EOL> def fill_work_queue ( work_queue , undownloaded_urls ) : <EOL> for u in undownloaded_urls : <EOL> work_queue . put ( u ) <EOL> def import_work ( work_queue , database_filepath ) : <EOL> undownloaded_urls = get_undownloaded_url ( database_filepath ) <EOL> fill_work_queue ( work_queue , undownloaded_urls ) <EOL> return len ( undownloaded_urls ) <EOL> class Watcher : <EOL> """<STR_LIT>""" <EOL> def __init__ ( self ) : <EOL> """<STR_LIT>""" <EOL> self . child = os . fork ( ) <EOL> if self . child == <NUM_LIT:0> : <EOL> return <EOL> else : <EOL> self . watch ( ) <EOL> def watch ( self ) : <EOL> try : <EOL> os . wait ( ) <EOL> except KeyboardInterrupt : <EOL> print ( "<STR_LIT>" ) <EOL> self . kill ( ) <EOL> sys . exit ( ) <EOL> def kill ( self ) : <EOL> try : <EOL> os . kill ( self . child , signal . SIGKILL ) <EOL> except OSError : pass <EOL> def main ( ) : <EOL> if len ( sys . argv ) < <NUM_LIT:2> : <EOL> print ( "<STR_LIT>" % ( sys . argv [ <NUM_LIT:0> ] ) ) <EOL> sys . exit ( <NUM_LIT:1> ) <EOL> else : <EOL> database_filepath = sys . argv [ <NUM_LIT:1> ] <EOL> output_dir = sys . argv [ <NUM_LIT:2> ] <EOL> if not os . path . exists ( output_dir ) : <EOL> os . makedirs ( output_dir ) <EOL> temp_dir = output_dir + os . sep + "<STR_LIT>" <EOL> if not os . path . exists ( temp_dir ) : <EOL> os . makedirs ( temp_dir ) <EOL> Watcher ( ) <EOL> threads = [ ] <EOL> work_queue = Queue . Queue ( ) <EOL> for i in range ( NUM_THREAD ) : <EOL> t = Downloader ( work_queue , output_dir , database_filepath ) <EOL> t . daemon = True <EOL> t . start ( ) <EOL> threads . append ( t ) <EOL> monitor_thread = Monitor ( threads ) <EOL> monitor_thread . daemon = True <EOL> monitor_thread . start ( ) <EOL> exit_flag = <NUM_LIT:0> <EOL> while exit_flag < <NUM_LIT:2> : <EOL> import_work ( work_queue , database_filepath ) <EOL> if work_queue . empty ( ) : <EOL> exit_flag += <NUM_LIT:1> <EOL> else : <EOL> exit_flag = <NUM_LIT:0> <EOL> while not work_queue . empty ( ) : <EOL> time . sleep ( <NUM_LIT:10> ) <EOL> for t in threads : <EOL> t . exit ( ) <EOL> monitor_thread . exit ( ) <EOL> if __name__ == '<STR_LIT:__main__>' : <EOL> main ( ) </s>
