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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/python: `  S2 \, g2 {\" b
  2. # -*- coding: utf-8 -*-8 W% @2 ^: `% g1 X+ j. r2 M
  3. # filename: paxel.py8 c0 w7 E- h& U4 o8 J! \
  4. - J& U2 ?8 s3 q0 L3 G\" ?  S: y' e
  5. '''It is a multi-thread downloading tool$ t\" U3 [9 D& O) y' ?/ q

  6. $ L\" M; P3 g\" r9 S& p( k
  7.     It was developed follow axel.
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  8.         Author: volans1 u\" s' U/ Y& k/ S, ]9 @/ x
  9.         E-mail: volansw [at] gmail.com' N\" I. w1 S$ Q7 K* c. g
  10. '''3 o/ U: p\" d$ _4 V+ a6 s
  11. 2 }+ T' U) z5 w6 E+ X+ U$ G
  12. import sys1 k& p# c; u5 y& t
  13. import os3 W9 Z\" E0 j7 [3 Q  z
  14. import time
    + B\" R& X& A2 x! D. I
  15. import urllib2 c9 V; f  k- a9 _, C
  16. from threading import Thread$ Z! r! X5 {% e\" O8 ^9 J8 R
  17. : U3 m% i  z2 J8 h- k9 d$ N
  18. local_proxies = {'http': 'http://131.139.58.200:8080'}
    $ [% ~/ K. K; v2 M+ g
  19. % o0 B\" Z0 s& {5 \* B: F
  20. class AxelPython(Thread, urllib.FancyURLopener):
    ; |$ I\" a- D1 x4 k2 o
  21.     '''Multi-thread downloading class.3 e, ?/ D- ?8 Z/ k; C

  22. : [& F7 q9 |3 ?+ X
  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={}):
    + V) ~% ^/ y' Y# G* b  G
  26.         Thread.__init__(self, name=threadname)  T\" b; b/ t5 k* r( n9 K
  27.         urllib.FancyURLopener.__init__(self, proxies)
    ) Q( R% Y8 \2 b9 @+ _' ?- S
  28.         self.name = threadname
    $ ~9 q4 n, z6 Q: o
  29.         self.url = url3 K- a/ k3 L7 I3 b
  30.         self.filename = filename+ V2 c$ R1 R5 a1 r& @5 e$ V0 z
  31.         self.ranges = ranges  R# W/ z; ~0 \6 H% {
  32.         self.downloaded = 0* p4 t8 ?* \) C. M& R

  33. 1 v3 U9 D7 o1 S9 o$ E) ~& t
  34.     def run(self):$ Z$ d$ {' p0 i% ^' Y0 H6 f! a  G& G
  35.         '''vertual function in Thread'''
    ' M# D# k/ v/ A
  36.         try:
    3 n5 w1 W4 j6 W# p! K\" l! i\" C, _3 G
  37.             self.downloaded = os.path.getsize( self.filename )
    2 d4 j. d2 z6 o/ v
  38.         except OSError:
    / Z9 @# s' @  y0 V8 S: B  g1 I3 N
  39.             #print 'never downloaded'  Q  S/ R1 i$ k5 Z1 h4 B8 v% p
  40.             self.downloaded = 0- I& W( X* i\" U0 r( d
  41. 8 T( _8 R4 }/ w1 x  w. H
  42.         # rebuild start poind2 S3 q& F4 h0 p
  43.         self.startpoint = self.ranges[0] + self.downloaded
    / p1 o' Q% ?, p# g6 q5 V0 B
  44.          8 H' n/ |4 R* j+ b. \9 D; u. ^8 l. @
  45.         # This part is completed' u- i\" A- V& X$ f2 {
  46.         if self.startpoint >= self.ranges[1]:
    * D- o! r0 b: }8 M
  47.             print 'Part %s has been downloaded over.' % self.filename: @# {! N4 ?& {/ ^
  48.             return: \( V' K( u4 }; [- }* R
  49.          
    6 j# Y2 y( d7 A( X  N1 J
  50.         self.oneTimeSize = 16384 #16kByte/time' m5 i' S3 _  f3 \5 M
  51.         print 'task %s will download from %d to %d' % (self.name, self.startpoint, self.ranges[1])
    \" S% m$ b! A) E/ J: b/ t: P\" q

  52. - z% y3 j* x1 k; K0 ?3 M
  53.         self.addheader("Range", "bytes=%d-%d" % (self.startpoint, self.ranges[1]))
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  54.              9 X; _+ I! x7 r: B8 H* P8 W6 @9 D
  55.         self.urlhandle = self.open( self.url )
    3 e+ t, @& R( [

  56. - w# \6 E+ e5 ?2 o  Q5 r: I- S
  57.         data = self.urlhandle.read( self.oneTimeSize )
    7 c$ m6 `4 j6 r8 O3 ?8 G, x  }
  58.         while data:  Y* h1 C$ a* M0 E6 v0 A
  59.             filehandle = open( self.filename, 'ab+' ); ?# s- p9 ?2 |. W3 V/ b
  60.             filehandle.write( data )
    & i/ U  f. G( c# S& y; `
  61.             filehandle.close()
    9 O, P' {  A6 \' a8 c0 o
  62. 8 ]$ }' u! g4 ?2 }( }7 r$ @
  63.             self.downloaded += len( data )0 A% Q: B9 y  q
  64.             #print "%s" % (self.name)/ q# A& z\" a# |0 T' h! L7 |
  65.             #progress = u'\r...'
    5 l3 s) T0 `# C4 {

  66. * z8 A% z% [! b2 k, B& ~7 ?+ _
  67.             data = self.urlhandle.read( self.oneTimeSize )% m  q- H. a. Z- x
  68.          ; i  ~  e# u; r' N) W
  69. def GetUrlFileSize(url, proxies={}):
    # \& C. F! c% b
  70.     urlHandler = urllib.urlopen( url, proxies=proxies )
    , m# N- `0 A% [
  71.     headers = urlHandler.info().headers7 i; U4 N0 Z6 ]5 f2 [
  72.     length = 0
    . k' S& B4 B  B4 K\" |. Y) H
  73.     for header in headers:
    0 |) A' H% E5 ?/ K+ r/ K4 L! I
  74.         if header.find('Length') != -1:$ }. y5 R% I: H* T2 x. [
  75.             length = header.split(':')[-1].strip()
    , I, V7 N7 e2 d
  76.             length = int(length)
    3 G& z4 k0 i  L
  77.     return length
    5 q; w' s9 k, [; b8 V# G! J* ~0 {) D. v

  78. * Z0 h6 W0 Y( P1 D
  79. def SpliteBlocks(totalsize, blocknumber):- m* \6 R& K  b5 v+ [
  80.     blocksize = totalsize/blocknumber
    + o8 C8 I1 }* l  E, w+ Q9 d! B! g
  81.     ranges = []/ c/ F4 |' h2 k2 q
  82.     for i in range(0, blocknumber-1):# I6 X: B9 Z3 j7 V. g
  83.         ranges.append((i*blocksize, i*blocksize +blocksize - 1))
    * O: M$ _! Z+ }( P
  84.     ranges.append(( blocksize*(blocknumber-1), totalsize -1 ))
    6 M+ H9 s2 A) P2 m3 z\" c! e+ k+ @

  85. 8 I) ]  @/ e+ v# C% k: b
  86.     return ranges+ F+ Y1 E  e; y
  87. def islive(tasks):
    + Q$ R+ ~( |3 j& S
  88.     for task in tasks:# r4 R4 F7 I\" N
  89.         if task.isAlive():
    * B2 g, q6 E$ _  ^  P
  90.             return True
    $ h. i* s1 s- f# `# s1 j; n9 N
  91.     return False3 a+ r8 c1 R( `2 k. `2 R: m, m. x
  92. 3 V4 l( A: y2 ~
  93. def paxel(url, output, blocks=6, proxies=local_proxies):; I5 |# |2 U& }$ A  f
  94.     ''' paxel7 U: I2 f5 z) B& b4 F& e
  95.     '''
    ; D9 f. ]: {0 x+ w
  96.     size = GetUrlFileSize( url, proxies )
    ) \4 W$ ]4 V0 q1 Q' h1 e
  97.     ranges = SpliteBlocks( size, blocks ); V  W! B& ~1 a9 J* G- f4 u
  98. \" Y+ K: _6 a! _% B0 A
  99.     threadname = [ "thread_%d" % i for i in range(0, blocks) ]
      ^- H2 _( {1 a6 \- w! Y- P8 E( M
  100.     filename = [ "tmpfile_%d" % i for i in range(0, blocks) ]& _; S' T' Z8 V
  101.    
    0 C  V# j3 `! {9 P$ {, ^+ Y
  102.     tasks = []$ K- t& u8 k: H5 ^- g4 c& M
  103.     for i in range(0,blocks):
    : \. O; O6 O% C: w
  104.         task = AxelPython( threadname[i], url, filename[i], ranges[i] ), I9 K) j. |. g+ }/ {
  105.         task.setDaemon( True )3 h+ p) y; n# A' U& x\" X+ W- J
  106.         task.start()$ G: M* o+ d$ Y1 h$ d( T
  107.         tasks.append( task )# U5 h! e3 ^7 @' j5 L6 M\" b! O
  108.          ! Y- p- B1 z+ a) Y; _
  109.     time.sleep( 2 )4 Y+ U5 q9 |) r6 M0 S* B2 S
  110.     while islive(tasks):
    ' l( ^% X! Y& ?4 D8 ?# t/ X5 Y' I
  111.         downloaded = sum( [task.downloaded for task in tasks] )
    $ ~8 \1 X+ l! H( U\" w+ U/ m  j
  112.         process = downloaded/float(size)*100\" o$ f0 Q$ B/ G4 Y7 I' b3 o* o/ l, T% c/ h
  113.         show = u'\rFilesize:%d Downloaded:%d Completed:%.2f%%' % (size, downloaded, process)
    4 Y8 |\" S6 l, J8 \7 U
  114.         sys.stdout.write(show)
    2 X5 j4 s- T+ A7 Q4 M. h\" c9 h
  115.         sys.stdout.flush()' b; Y! H5 y2 |/ w. _& z; M: K
  116.         time.sleep( 0.5 )8 g\" t6 q! k; h8 R+ G+ p8 T; ^! t
  117.             
    ! r. J\" q( {\" Q( x, x9 D+ j9 a9 w
  118.     filehandle = open( output, 'wb+' )  s; E* J# }+ c- g( _; L
  119.     for i in filename:# y3 [5 x. ?( U- j' Z+ |
  120.         f = open( i, 'rb' )
    8 x1 O( e! h+ f' z; L) t
  121.         filehandle.write( f.read() ); H* E2 a' m  Q- B, t% |$ W2 g
  122.         f.close()% k) k: p$ \8 C1 H' g) C  O
  123.         try:4 ?3 Q% u$ v\" M: t8 `9 X$ f
  124.             os.remove(i)9 i# @( V, f- A6 I\" R
  125.             pass
    8 U4 z( v0 T3 q+ b% @4 ^; u
  126.         except:\" X; P& S: ]6 u1 Y2 k) x6 y
  127.             pass
    : [. r8 V3 s2 f: Q9 W9 }* a: o
  128. 8 [4 M$ u4 t/ W1 M
  129.     filehandle.close(): }9 Q* a8 l\" Z. B! d  p

  130. * n+ u7 V; U9 C& z  W2 J/ P+ l
  131. if __name__ == '__main__':7 Y% G& f  V2 T- {8 N  d
  132.     url = "http://xz1.mm667.com/xz84/images/001.jpg"5 j9 h1 O1 _: U\" l
  133.     output = '001.jpg'0 {# `+ d# a: e) T' ]. `, d) Z
  134.     paxel( url, output, blocks=4, proxies={} )
复制代码

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