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多线程下载图集

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发表于 2024-3-31 17:18 |只看该作者 |倒序浏览
|招呼Ta 关注Ta
网上好看的动漫图集,如果手工下载太费时了。简单分析下网页地址规律,写个多线程脚本搞定。
  1. #!/usr/bin/python0 T: U$ L* H\" F- D
  2. # -*- coding: utf-8 -*-3 \; V9 P1 O; k5 _+ M; n
  3. # filename: paxel.py
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  4. 3 y7 B! z% w+ {$ f7 V5 ?5 P8 K0 p  S( R
  5. '''It is a multi-thread downloading tool
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  6. & f! c. Z* k2 C5 C+ h
  7.     It was developed follow axel.
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  8.         Author: volans
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  9.         E-mail: volansw [at] gmail.com3 J7 g% P4 g7 m, `# M: p
  10. '''- _$ u. e$ ], j# v3 y
  11. 5 J0 Y3 u% Q% M9 v2 L6 F. Z
  12. import sys
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  13. import os+ w+ }* O, w\" \) j& J! e
  14. import time4 c( G6 Z& c) X; Y9 J# H
  15. import urllib1 X4 e: J7 s  z\" c9 Q& d
  16. from threading import Thread: z\" H7 D# r) {  u: U% c9 n

  17. ( i% ?8 O$ b, c7 g
  18. local_proxies = {'http': 'http://131.139.58.200:8080'}! h9 I9 C- n! c4 G8 t6 g

  19. 8 I7 f6 L; |$ e; P+ F, W  l
  20. class AxelPython(Thread, urllib.FancyURLopener):
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  21.     '''Multi-thread downloading class.2 J% y. s/ r8 b: q
  22. . ~\" V9 W/ C# C
  23.         run() is a vitural method of Thread.
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  24.     '''
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  25.     def __init__(self, threadname, url, filename, ranges=0, proxies={}):
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  26.         Thread.__init__(self, name=threadname)
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  27.         urllib.FancyURLopener.__init__(self, proxies)! _5 x/ b- y! @* K\" X+ m2 X
  28.         self.name = threadname
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  29.         self.url = url6 T5 J2 j6 T6 @7 g! K  `
  30.         self.filename = filename+ \6 X  r( }8 c% b! _5 L
  31.         self.ranges = ranges0 P$ M3 d& Z* z, O) v8 E0 j: l2 i
  32.         self.downloaded = 01 k( [3 ]; I4 n' w2 H

  33. $ S8 m( ?: n3 M1 j/ b
  34.     def run(self):% P; a* K\" T- L) d1 U
  35.         '''vertual function in Thread'''
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  36.         try:& u9 Q- D! {$ @$ K0 v8 a
  37.             self.downloaded = os.path.getsize( self.filename )  k! H9 \- \0 Q8 t- B) ?
  38.         except OSError:
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  39.             #print 'never downloaded'5 P1 ~4 w# M+ ?& I' L) Q- g) d& r; n: w
  40.             self.downloaded = 0% ^6 x6 F% `# J\" y+ Z

  41. - f* o, z2 i4 Y
  42.         # rebuild start poind
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  43.         self.startpoint = self.ranges[0] + self.downloaded
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  44.          
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  45.         # This part is completed7 y! R& v7 R6 p6 f! S- [2 {- i7 F' q
  46.         if self.startpoint >= self.ranges[1]:
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  47.             print 'Part %s has been downloaded over.' % self.filename
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  48.             return
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  49.          
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  50.         self.oneTimeSize = 16384 #16kByte/time2 ]8 P* }8 h; T# j; c
  51.         print 'task %s will download from %d to %d' % (self.name, self.startpoint, self.ranges[1])
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  52. 0 q2 }# n$ t1 q7 v; W
  53.         self.addheader("Range", "bytes=%d-%d" % (self.startpoint, self.ranges[1]))4 c2 X/ O8 u  d\" Z  l
  54.              # P( M/ @\" \\" n& N7 F# Z: s
  55.         self.urlhandle = self.open( self.url )
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  56. , E3 }$ c) a! ]: ^. ~7 }
  57.         data = self.urlhandle.read( self.oneTimeSize )
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  58.         while data:  p4 T  L% r8 B
  59.             filehandle = open( self.filename, 'ab+' )$ _1 ~) ]! g% u& _
  60.             filehandle.write( data )/ Q\" C+ l5 q. j) S
  61.             filehandle.close()
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  62. % h5 V8 U  Z3 v$ x: \7 S
  63.             self.downloaded += len( data )
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  64.             #print "%s" % (self.name)9 l$ I! v! H! i; a
  65.             #progress = u'\r...'. s\" r1 z1 X9 F9 Q, L! _
  66. \" s: B) K' o) ^# @- O\" W( ~
  67.             data = self.urlhandle.read( self.oneTimeSize )
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  68.          4 A\" {/ e' y$ W; [  b
  69. def GetUrlFileSize(url, proxies={}):
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  70.     urlHandler = urllib.urlopen( url, proxies=proxies )  O+ L\" S( F3 S: I6 O6 P
  71.     headers = urlHandler.info().headers
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  72.     length = 0* [+ _% M2 q' e8 {; I0 h
  73.     for header in headers:% ^8 U9 k2 A8 {% R2 U; i
  74.         if header.find('Length') != -1:& C% b\" U* {  M  J
  75.             length = header.split(':')[-1].strip()1 ]* Z6 a! n& b\" v3 y, [! r1 \
  76.             length = int(length)
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  77.     return length, h1 }1 j0 d, D. x8 k

  78. ) \5 H- D5 Q3 u- x  C! B. `
  79. def SpliteBlocks(totalsize, blocknumber):! W' ?# M' T0 W
  80.     blocksize = totalsize/blocknumber
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  81.     ranges = []3 E4 |9 i6 c% E+ l* _$ G+ W
  82.     for i in range(0, blocknumber-1):
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  83.         ranges.append((i*blocksize, i*blocksize +blocksize - 1))+ C: Z, E3 P9 G- I  ~' `
  84.     ranges.append(( blocksize*(blocknumber-1), totalsize -1 ))$ ?2 }8 U; V2 S9 m' B
  85. 2 U6 Q6 ~- e% j\" A; D4 ?
  86.     return ranges
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  87. def islive(tasks):/ ]\" w5 n/ R* }8 o
  88.     for task in tasks:
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  89.         if task.isAlive():
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  90.             return True( M$ n, {% d% J. m- j7 i
  91.     return False
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  92. : w6 W1 L* w! R\" K' y
  93. def paxel(url, output, blocks=6, proxies=local_proxies):
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  94.     ''' paxel8 S* u7 A' ~8 D7 ~7 k\" T2 P
  95.     '''
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  96.     size = GetUrlFileSize( url, proxies )8 S; C! M( Z) a+ o% b& K
  97.     ranges = SpliteBlocks( size, blocks )
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  98. , b9 n% N' g( O: M+ H9 y
  99.     threadname = [ "thread_%d" % i for i in range(0, blocks) ]; |2 q/ |* q+ L5 Q\" Z6 t
  100.     filename = [ "tmpfile_%d" % i for i in range(0, blocks) ]2 c\" N- B) O\" X9 l) w
  101.    ) G4 x& V; d3 d% l
  102.     tasks = []
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  103.     for i in range(0,blocks):
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  104.         task = AxelPython( threadname[i], url, filename[i], ranges[i] )
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  105.         task.setDaemon( True ), V+ k3 N( K8 w3 k7 n
  106.         task.start()
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  107.         tasks.append( task )/ F\" W6 X( i( z8 [6 l. K
  108.          ! z4 }! A: l; P' V6 ^# Y
  109.     time.sleep( 2 )' ]* U; Y& u# h0 G
  110.     while islive(tasks):. S% z* `0 z  p1 f5 Q6 f6 Y
  111.         downloaded = sum( [task.downloaded for task in tasks] )\" ]5 T' H5 }* R6 `% ^* E1 ~7 l
  112.         process = downloaded/float(size)*100) h% s0 J' W; {% p4 i0 H# U* C
  113.         show = u'\rFilesize:%d Downloaded:%d Completed:%.2f%%' % (size, downloaded, process)
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  114.         sys.stdout.write(show)
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  115.         sys.stdout.flush()
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  116.         time.sleep( 0.5 )
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  117.             
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  118.     filehandle = open( output, 'wb+' )' j$ z* v+ I$ Q+ Y/ m- s- j* C
  119.     for i in filename:  ^, |* Q5 L. J  M4 W( T7 G4 ]2 n
  120.         f = open( i, 'rb' )
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  121.         filehandle.write( f.read() )
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  122.         f.close()2 z& T& t- a: u- w+ L& H3 o' _
  123.         try:4 t5 W# N8 K\" B7 q* E8 q
  124.             os.remove(i)% A3 a' W/ m6 f\" w# E
  125.             pass8 u. M8 u7 S! q# U  G6 r1 j
  126.         except:1 G4 A9 w9 g. H
  127.             pass
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  128. 7 g\" B& S/ f4 ?6 L7 D
  129.     filehandle.close()
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  130. 5 X' _% M( w. i: b0 f8 V
  131. if __name__ == '__main__':
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  132.     url = "http://xz1.mm667.com/xz84/images/001.jpg"
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  133.     output = '001.jpg'
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  134.     paxel( url, output, blocks=4, proxies={} )
复制代码
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