Python多线程抓取Google搜索链接网页

import simplejson
    
# The request also includes the userip parameter which provides the end 
# user's IP address. Doing so will help distinguish this legitimate 
# server-side traffic from traffic which doesn't come from an end-user. 
url = ('https://ajax.googleapis.com/ajax/services/search/web'
       '?v=1.0&q=Paris%20Hilton&userip=USERS-IP-ADDRESS')
    
request = urllib2.Request(
    url, None, {'Referer': /* Enter the URL of your site here */})
response = urllib2.urlopen(request)
    
# Process the JSON string. 
results = simplejson.load(response)
# now have some fun with the results...
  
import simplejson
   
# The request also includes the userip parameter which provides the end
# user's IP address. Doing so will help distinguish this legitimate
# server-side traffic from traffic which doesn't come from an end-user.
url = ('https://ajax.googleapis.com/ajax/services/search/web'
       '?v=1.0&q=Paris%20Hilton&userip=USERS-IP-ADDRESS')
   
request = urllib2.Request(
    url, None, {'Referer': /* Enter the URL of your site here */})
response = urllib2.urlopen(request)
   
# Process the JSON string.
results = simplejson.load(response)
# now have some fun with the results..

#-*-coding:utf-8-*- 
import urllib2,urllib
import simplejson
import os, time,threading
   
import common, html_filter
#input the keywords 
keywords = raw_input('Enter the keywords: ')                                 
   
#define rnum_perpage, pages 
rnum_perpage=8
pages=8                       
   
#定义线程函数 
def thread_scratch(url, rnum_perpage, page):
 url_set = [] 
 try:
   request = urllib2.Request(url, None, {'Referer': 'http://www.sina.com'})
   response = urllib2.urlopen(request)
   # Process the JSON string. 
   results = simplejson.load(response)
   info = results['responseData']['results']
 except Exception,e:
   print 'error occured'
   print e
 else:
   for minfo in info:
      url_set.append(minfo['url'])
      print minfo['url']
  #处理链接 
 i = 0
 for u in url_set:
   try:
     request_url = urllib2.Request(u, None, {'Referer': 'http://www.sina.com'})
     request_url.add_header(
     'User-agent',
     'CSC'
     )
     response_data = urllib2.urlopen(request_url).read()
     #过滤文件 
     #content_data = html_filter.filter_tags(response_data) 
     #写入文件 
     filenum = i+page
     filename = dir_name+'/related_html_'+str(filenum)
     print '  write start: related_html_'+str(filenum)
     f = open(filename, 'w+', -1)
     f.write(response_data)
     #print content_data 
     f.close()
     print '  write down: related_html_'+str(filenum)
   except Exception, e:
     print 'error occured 2'
     print e
   i = i+1
 return
   
#创建文件夹 
dir_name = 'related_html_'+urllib.quote(keywords)
if os.path.exists(dir_name):
   print 'exists  file'
   common.delete_dir_or_file(dir_name)
os.makedirs(dir_name)
   
#抓取网页 
print 'start to scratch web pages:'
for x in range(pages):
  print "page:%s"%(x+1)
  page = x * rnum_perpage
  url = ('https://ajax.googleapis.com/ajax/services/search/web'
                  '?v=1.0&q=%s&rsz=%s&start=%s') % (urllib.quote(keywords), rnum_perpage,page)
  print url
  t = threading.Thread(target=thread_scratch, args=(url,rnum_perpage, page))
  t.start()
#主线程等待子线程抓取完 
main_thread = threading.currentThread()
for t in threading.enumerate():
  if t is main_thread:
    continue
  t.join()