py 爬取页面http://m.sohu.com 并存储

  1 #思路 ： 利用beautiful 省去了正则这个麻烦事，把页面搞出来然后提取js,css,img ,提取命令使用getopt 很方便,使用前需要确保已经安装了beautiful soup,如没有安#装请 到 http://www.crummy.com/software/BeautifulSoup/ 下载
  2 from bs4 import BeautifulSoup
  3 import urllib, urllib2,time
  4 import sys,os
  5 import getopt
  6 reload(sys)  
  7 sys.setdefaultencoding("utf-8")
  8 
  9 #set default value 
 10 clock_time = 60
 11 target_url = "http://m.sohu.com"
 12 target_lib = "/tmp/backup"
 13 
 14 def usage() :
 15     print "simple like this :"
 16     print "main.py -d 60 -u http://m.sohu.com -o 	mpackup"
 17 
 18 def getHtml(target_url,target_lib,time) :
 19     response = urllib.urlopen(target_url)
 20     Html= response.read()
 21     target_lib=target_lib+'/'+time
 22     os.makedirs(target_lib)
 23     #save html
 24     print target_lib
 25     try :
 26         f = open(target_lib+"/index.html","w")
 27         f.write(Html)
 28         f.close()
 29         print "save index.html ok!"
 30     except Exception,e:
 31         print str(e)
 32     
 33     # save picture     
 34     os.makedirs(target_lib+"/images")
 35     soup = BeautifulSoup(Html)
 36     f=soup.find_all('img')
 37     if f != None :
 38         for i in f :
 39             pic_url=i.get('src')
 40             response = urllib.urlopen(pic_url)
 41             pic_url=pic_url.split('/')
 42             pic= response.read()
 43             try :
 44                 f = open(target_lib+"/images/"+pic_url[-1],"wb")
 45                 f.write(pic)
 46                 f.close()
 47             except Exception,e :
 48                 print str(e)
 49                            
 50     print "save picture ok!"
 51     
 52     #save js 
 53     os.makedirs(target_lib+"/js")
 54     f=soup.find_all('script')
 55     noName=0
 56     if f != None :
 57         for i in f :
 58             if i.get('src')!=None :
 59                 js_url=i.get('src')
 60                 response = urllib.urlopen(js_url)
 61                 js_url=js_url.split('/')
 62                 js= response.read()
 63                 try :
 64                     f = open(target_lib+"/js/"+js_url[-1],"w")
 65                     f.write(js)
 66                     f.close()
 67                 except Exception,e :
 68                     print str(e)
 69             else :  # js 可以嵌入在文档里 保存为wuming
 70                 f = open(target_lib+"/js/"+"wuming"+str(noName)+".js","w")
 71                 noName+=1
 72                 f.write(i.string)
 73                 f.close()
 74     print "save js ok!"    
 75     
 76     #save css
 77     os.makedirs(target_lib+"/css")
 78     f=soup.find_all('link')
 79     if f != None :
 80             for i in f :
 81                 if i.get('type') != None and i.get('type') == "text/css" :
 82                     css_url=i.get('href')
 83                     response = urllib.urlopen(css_url)
 84                     css_url=css_url.split('/')
 85                     css= response.read()
 86                     try :
 87                         f = open(target_lib+"/css/"+css_url[-1],"w")
 88                         f.write(css)
 89                         f.close()
 90                     except Exception,e :
 91                         print str(e)
 92     print "save css ok!"
 93     
 94 def main() :
 95     global clock_time
 96     global target_url
 97     global target_lib
 98     
 99     if not len(sys.argv[1:]) :
100         usage()
101     try :
102         opts,args = getopt.getopt(sys.argv[1:], "d:u:o:",[])
103     except getopt.GetoptError as err :
104         print str(err) 
105         usage()
106         
107     for o,a in opts :
108         if o in ("-d") :
109             clock_time = a
110         if o in ("-u") :
111             target_url = a
112         if o in ("-o") :
113             target_lib = a
114     
115     lastTime = int(time.time())
116     timeArray = time.localtime(lastTime)
117     otherStyleTime = time.strftime("%Y%m%d%H%M", timeArray)    
118     getHtml(target_url,target_lib,otherStyleTime)
119     
120     while True :
121         nowTime=int(time.time())
122         if nowTime - lastTime >= 60 :
123             lastTime=nowTime
124             timeArray = time.localtime(nowTime)
125             otherStyleTime = time.strftime("%Y%m%d%H%M", timeArray)            
126             getHtml(target_url,target_lib,otherStyleTime)     
127             print "update at time" + otherStyleTime
128 if __name__=="__main__" :
129     main()