BeautifulSoup 抓取网站url

  1 # -*- coding:utf-8 -*-
  2 import urlparse
  3 import urllib2
  4 from bs4 import BeautifulSoup
  5
  6 url = "http://www.baidu.com"
  7
  8 urls = [url] # stack of urls to scrape
  9 visited = [url] # historic record of urls
 10
  1 # -*- coding:utf-8 -*-
  2 import urlparse
  3 import urllib2
  4 from bs4 import BeautifulSoup
  5
  6 url = "http://www.baidu.com"
  7
  8 urls = [url] # stack of urls to scrape
  9 visited = [url] # historic record of urls
 10
 11 while len(urls) > 0:
 12     try:
 13         htmltext = urllib2.urlopen(urls[0]).read()
 14     except:
 15         print urls[0]
 16     soup = BeautifulSoup(htmltext,"html")
 17
 18     urls.pop(0)
 19
 20     for tag in soup.findAll("a", href=True):
 21         tag["href"] = urlparse.urljoin(url, tag["href"])
 22         if url in tag["href"] and tag["href"] not in visited:
 23             urls.append(tag["href"])
 24             visited.append(tag["href"])
 25
 26     print len(urls)