python通过urllib2爬网页上种子下载示例

通过urllib2、re模块抓种子

思路

1.用程序登录论坛(如果需要登录才能访问的版块)

2.访问指定版块

3.遍历帖子(先取指定页,再遍历页面所有帖子的url)

4.循环访问所有帖子url,从帖子页面代码中取种子下载地址(通过正则表达式或第三方页面解析库)

5.访问种子页面下载种子

import urllib
import urllib2
import cookielib
import re
import sys
import os

# site is website address | fid is part id
site = “http://xxx.yyy.zzz/”
source = “thread0806.php?fid=x&search=&page=”

btSave = “./clyzwm/”
if os.path.isdir(btSave):
print btSave + ” existing”
else:
os.mkdir(btSave)

logfile = “./clyzwm/down.log”
errorfile = “./clyzwm/error.log”
sucfile = “./clyzwm/sucess.log”

headers = {‘User-Agent’ : ‘Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/32.0.1700.77 Safari/537.36’,
‘Referer’ : ‘http://xxx.yyy.zzz/’}

def btDown(url, dirPath):
logger(logfile, “download file : ” + url)
try:
#pageCode = urllib2.urlopen(url).read()
#print pageCode
btStep1 = re.findall(‘http://[w]+.[w]+.[w]{0,4}/[w]{2,6}.php?[w]{2,6}=([w]+)’, url, re.I)
#print btStep1
if len(btStep1)>0:
ref = btStep1[0]
downsite = “”
downData = {}
if len(ref)>20:
downsite = re.findall(‘http://www.[w]+.[w]+/’, url)[0]
downsite = downsite + “download.php”
reff = re.findall(‘inputstype=”hidden”sname=”reff”svalue=”([w=]+)”‘, urllib2.urlopen(url).read(), re.I)[0]
downData = {‘ref’: ref, ‘reff’:reff, ‘submit’:’download’}
else:
downsite = “http://www.downhh.com/download.php”
downData = {‘ref’: ref, ‘rulesubmit’:’download’}
#print “bt site – ” + downsite + “n downData:”
#print downData
downData = urllib.urlencode(downData)
downReq = urllib2.Request(downsite, downData)
downReq.add_header(‘User-Agent’,’Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/32.0.1700.77 Safari/537.36′)
downPost = urllib2.urlopen(downReq)
stream = downPost.read(-1)
if (len(stream) > 1000):
downPost.close()
name = btStep1[0]+ “.torrent”
fw = open(dirPath + name, ‘w’)
fw.write(stream)
fw.close()
logger(sucfile, url+”n”)
else:
logger(errorfile, url+”n”)
except urllib2.URLError, e:
print e.reason

def logger(logfile, msg):
print msg
fw = open(logfile, ‘a’)
fw.write(msg)
fw.close()

for i in range(1, 1000):
logger(logfile, “nnn@ page ” + str(i) + ” …”)
part = site + source + str(i)

content = urllib2.urlopen(part).read()
content = content.decode(‘gbk’).encode(‘utf8’)
#print content

pages = re.findall(‘<as+href=”(htm_data/[d]+/[d]+/[d]+.html).*?</a>’,%20content,re.I)
#print%20pages

%20%20

for%20page%20in%20pages:
page%20=%20site%20+%20page;
#logger(logfile,%20″n# visiting ” + page + ” …”)
pageCode = urllib2.urlopen(page).read()
#print pageCode
zzJump = re.findall(‘http://www.viidii.info/?http://[w]+/[w]+?[w]{2,6}=[w]+’ ,pageCode)
#zzJump = re.findall(‘http://www.viidii.info/?http://[w/?=]*’, pageCode)
if len(zzJump) > 0:
zzJump = zzJump[0]
#print “- jump page – ” + zzJump
pageCode = urllib2.urlopen(page).read()
zzPage = re.findall(‘http://[w]+.[w]+.[w]+/link[w]?.php?[w]{2,6}=[w]+’ ,pageCode)
if len(zzPage) > 0:
zzPage = zzPage[0]
logger(logfile, “n- zhongzi page -” + zzPage)
btDown(zzPage, btSave)
else:
logger(logfile, “n. NOT FOUND .”)
else:
logger(logfile, “n… NOT FOUND …”)
zzPage = re.findall(‘http://[w]+.[w]+.[w]+/link[w]?.php?ref=[w]+’ ,pageCode)

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