Python 爬取所有51VOA网站的Learn a words文本及mp3音频
#!/usr/bin/env python
# -*- coding: utf-8 -*-
#Python 爬取所有51VOA网站的Learn a words文本及mp3音频
import os
import sys
import time
import urllib as req
from threading import Thread
import urllib2
import urllib
from threading import Thread
import xml
import re
class MyWorkThread(Thread, urllib.FancyURLopener):
"""
Multi-thread downloading class.
run() is a vitual method of Thread
"""
def __init__(self, threadname, url, filename, ranges = 0):
Thread.__init__(self, name = threadname)
urllib.FancyURLopener.__init__(self)
self.name = threadname
self.url = url
self.filename = filename
self.ranges = ranges
self.downloaded = 0
def run(self):
"""
virtual function in Thread
"""
try:
self.downloaded = os.path.getsize(self.filename)
except OSError:
self.downloaded = 0
#rebuild start point
self.startpoint = self.ranges[0] + self.downloaded #if this part is completed
if self.startpoint >= self.ranges[1]:
print 'Part %s has been downloaded over.' % self.filename
return
self.oneTimeSize = 8 * 1024 #8K bytes / time
print 'task %s will download from %d to %d' %(self.name, self.startpoint, self.ranges[1])
self.addheader('Range', 'bytes=%d-%d' %(self.startpoint, self.ranges[1]))
self.urlhandle = self.open(self.url)
data = self.urlhandle.read(self.oneTimeSize)
while data:
filehandle = open(self.filename, 'ab+')
filehandle.write(data)
filehandle.close()
self.downloaded += len(data)
data = self.urlhandle.read(self.oneTimeSize)
def GetUrlFileSize(url):
urlHandler = urllib.urlopen(url)
headers = urlHandler.info().headers
length = 0
for header in headers:
if header.find('Length') != -1:
length = header.split(':')[-1].strip()
length = int(length)
return length
def SpliteBlocks(totalsize, blocknumber):
blocksize = totalsize / blocknumber
ranges = []
for i in range(0, blocknumber -1):
ranges.append((i * blocksize, i * blocksize + blocksize -1))
ranges.append((blocksize * (blocknumber -1), totalsize -1))
return ranges
def isLive(tasks):
for task in tasks:
if task.isAlive():
return True
return False
def downLoadFile(url, output, blocks = 6):
sys.stdout.write('Begin to download from %s\n' %url )
sys.stdout.flush()
size = GetUrlFileSize(url)
ranges = SpliteBlocks(size, blocks) threadname = ["thread_%d" %i for i in range(0, blocks)]
filename = ["tmpfile_%d" %i for i in range(0, blocks)]
tasks = []
for i in range(0, blocks):
task = MyWorkThread(threadname[i], url, filename[i], ranges[i])
task.setDaemon(True)
task.start()
tasks.append(task)
time.sleep(2)
while isLive(tasks):
downloaded = sum([task.downloaded for task in tasks])
process = downloaded / float(size) * 100
show = u'\rFilesize: %d Downloaded:%d Completed: %.2f%%' %(size, downloaded, process)
sys.stdout.write(show)
sys.stdout.flush
time.sleep(1) output = formatFileName(output)
filehandle = open(output, 'wb+')
for i in filename:
f = open(i, 'rb')
filehandle.write(f.read())
f.close()
os.remove(i)
filehandle.close()
sys.stdout.write("Completed!\n")
sys.stdout.flush()
def formatFileName(filename):
if isinstance(filename, str):
header, tail = os.path.split(filename)
if tail != '':
tuple = ('\\','/',':','*', '?', '"', '<', '>', '|')
for char in tuple:
if tail.find(char) != -1:
tail = tail.replace(char, ' ')
filename = os.path.join(header, tail)
#print filename
return filename
else:
return 'None' def remove_tags(raw_html):
cleanr =re.compile('<.*?>')
cleantext = re.sub(cleanr,'', raw_html)
return cleantext def saveword(url,name):
res=req.urlopen(url)
data=res.readlines()
res.close()
startag=r'id="mp3"'
endtag=r'</div>'
k=80
data2=''
data3=''
data4=''
while k<len(data)-10:
if(data[k].find(startag)!=-1):
data2=data[k]
if(data[k].find('<div id="content">')!=-1):
data3=data[k]
if(data[k+1].find('<p>')!=-1):
data4=data[k+1]
# if(data4.rfind('...')!=-1):
# endid = data4.find('...')+3
# else:
# endid = data4.find('</p>')
# data4 = data4[3:endid]
data4=remove_tags(data4)
k=k+1
# print data2
## data=str(data)
## data2=data[(data.find(startag)+14):data.lower().find(endtag)+3]
## data3=data[105]
# print data3
mp3url=data2[data2.find('http'):data2.find(''' title="''')-1]
if(data3.find(endtag)!=-1):
sent = data3[data3.find('今天我们要学'):data3.find(endtag)]
else:
sent = data3[data3.find('今天我们要学'):].strip('\n').strip('\r')+data4.strip('\n')
# sent = sent.replace('\n','. ')
# print mp3url,sent
f=open('LearningWord.txt','a+')
sent=remove_tags(sent)
f.write(name+'\n'+sent.strip('\r')+'\n')
f.close()
# print str(name)+'.mp3'
if(data2.find(startag)!=-1):
downLoadFile(mp3url,str(formatFileName(name.replace(':', ' ')))+'.mp3', blocks = 4) def savepage(url):
res=req.urlopen(url)
data=res.read()
res.close()
startag='''<ul><li>'''
endtag='''</li></ul>'''
data=str(data)
data2=data[data.find(startag)+12:data.find(endtag)]
linestart='href'
meddle = '''" target'''
lineend = '</a>'
urls=[]
words = []
i=data2.find(linestart)
while(i!=-1):
k = data2.find(meddle)
j = data2.find(lineend)
url = 'http://www.51voa.com/'+data2[i+6:k]
urls = urls+[url]
word = data2[k+16:j]
print i,k,j, word,url
words = words + [word]
data2=data2[j+3:]
saveword(url,word)
i=data2.find(linestart)
# break #下载所有单词
f=open('LearningWord.txt','w')
f.close()
i=53
while i<=54:
url = 'http://www.51voa.com/Learn_A_Word_'+str(i)+'.html'
savepage(url)
i=i+1 #下载指定单词
#url = "http://www.51voa.com/Voa_English_Learning/Learn_A_Word_21951.html"
#name ='9:pop up'
#saveword(url,name)
下载单词文本示例：(全部单词文本下载地址：http://pan.baidu.com/s/1o8pmojS)
2650 endorse
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2649 deportation
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2648 voluntarily
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2647 guerrilla
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2646 curfew
今天我们要学的词是 curfew. Curfew 名词，宵禁。The city of Charlotte in North Carolina has lifted its midnight curfew, but the state of emergency remains in effect. 北卡罗来纳州夏洛特市取消了午夜宵禁，但是紧急状态依旧生效。Authorities in an Austrian city imposed a curfew on young immigrants following a series of sexual attacks at a local beer and wine festival. 奥地利一个城市的有关当局对未成年移民实施宵禁，此前当地一个啤酒葡萄酒节期间发生了一系列性侵事件。 好的，我们今天学习的词是 curfew, curfew, curfew...
2645 estimate
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2644 mercy killing
今天我们要学的词是 mercy killing. Mercy killing 名词，安乐死。A terminally ill 17-year-old has become the first minor to be euthanized in Belgium since the age restrictions on such mercy killings were lifted in 2014. 比利时一个17岁绝症男孩安乐死，他是比利时2014年取消对安乐死年龄限制以来第一个安乐死的未成年人。The United Arab Emirates passed a new law banning all mercy killings. 阿联酋通过新法律，禁止安乐死。好的，我们今天学习的词是 mercy killing, mercy killing, mercy killing...