爬虫爬取百度搜索结果,python爬虫爬取歌曲

python抓取百度音乐mp3歌曲,目前成功率不是100%，因为我每首歌只抓一遍，没有去判断抓取成功情况和链接速度,
还有我取得歌曲名称的方式也有点不合适，对歌曲名称较长的歌曲来说去搜索来源有时候是搜捕到的，采用准确的歌曲名称后就没有这个问题了。
源代码实现如下：
#-*- coding: UTF-8 -*-
”’
Created on 2012-3-8
@author: tiantian
*** python
”’
import urllib
import re
top500 = ‘***/top/top500.html’
sOngs= []
def main():
divr = ‘<div .*?<ul.*?</ul>.*?<ul.*?</ul>.*?</div>’
mf = urllib.urlopen(top500)
cOntent= mf.read()
cOntent= content.decode(‘gbk’)
cOntent= re.sub(‘n+’,’ ‘,content)
alldiv = re.findall(divr,content)
i =0
for div in alldiv:
ulr = ‘<ul.*?</ul>’
allul = re.findall(ulr,div)
for ul in allul:
lir = ‘<li.*?</li>’
allli = re.findall(lir,ul)
for li in allli:
if i<245:
i = i+1
continue
i = i+1
sOngName= ‘<div >.*?<a.*?>(.*?)</a>.*?</div>’
name = re.findall(songName,li)
sOngAuthor= ‘<div >.*?<a.*?>(.*?)</a>.*?</div>’
author = re.findall(songAuthor,li)
songs.append([name[0],author[0]])
sOngUrl= getSongUrl(name[0],author[0])
try:
urllib.urlretrieve(songUrl,’songs/’+name[0]+’-‘+author[0]+’.mp3′)
【爬虫爬取百度搜索结果,python爬虫爬取歌曲】 # 异常检查并不能判断是否下载成功，需要进行其他判断
print i,name[0],author[0],’下载成功’
except Exception :
print i,name[0],author[0],’没下载成功’
def getSongUrl(songName,authorName):
”’这里由于歌曲名称和作者名称的不完整，可能导致无法得到url，”’
sOngUrl= ‘***/x?op=12&count=1&mtype=1&title=%s$$%s$$$$&url=&listenreelect=0&.r=0.1696378872729838’ % (urllib.quote(songName.encode(‘gbk’)),urllib.quote(authorName.encode(‘gbk’)))
f = urllib.urlopen(songUrl)
c = f.read()
url1 = re.findall(‘<encode>.*?CDATA[(.*?)]].*?</encode>’,c)
url2 = re.findall(‘<decode>.*?CDATA[(.*?)]].*?</decode>’,c)
if len(url1) <1:
return ‘***/unknow.mp3’
try:
return url1[0][:url1[0].rindex(‘/’)+1] + url2[0]
except Exception:
return url1[0]
if __name__ == ‘__main__’:
main()