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【Python】查询百度中关键词排名

作者:alexkh / 发布于2013/7/19/ 765


	#coding=utf-8

	import requests
	import BeautifulSoup
	import re
	import random

	def decodeAnyWord(w):
	 try:
	 w.decode('utf-8')
	 except:
	 w = w.decode('gb2312')
	 else:
	 w = w.decode('utf-8')
	 return w

	def createURL(checkWord): #create baidu URL with search words
	 checkWord = checkWord.strip()
	 checkWord = checkWord.replace(' ', '+').replace('\n', '')
	 baiduURL = 'http://www.baidu.com/s?wd=%s&rn=100' % checkWord
	 return baiduURL

	def getContent(baiduURL): #get the content of the serp
	 uaList = ['Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1;+.NET+CLR+1.1.4322;+TencentTraveler)',
	 'Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1;+.NET+CLR+2.0.50727;+.NET+CLR+3.0.4506.2152;+.NET+CLR+3.5.30729)',
	 'Mozilla/5.0+(Windows+NT+5.1)+AppleWebKit/537.1+(KHTML,+like+Gecko)+Chrome/21.0.1180.89+Safari/537.1',
	 'Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1)',
	 'Mozilla/5.0+(Windows+NT+6.1;+rv:11.0)+Gecko/20100101+Firefox/11.0',
	 'Mozilla/4.0+(compatible;+MSIE+8.0;+Windows+NT+5.1;+Trident/4.0;+SV1)',
	 'Mozilla/4.0+(compatible;+MSIE+8.0;+Windows+NT+5.1;+Trident/4.0;+GTB7.1;+.NET+CLR+2.0.50727)',
	 'Mozilla/4.0+(compatible;+MSIE+8.0;+Windows+NT+5.1;+Trident/4.0;+KB974489)']
	 headers = {'User-Agent': random.choice(uaList)}
	ipList = ['202.43.188.13:8080',
	'80.243.185.168:1177',
	'218.108.85.59:81']
	proxies = {'http': 'http://%s' % random.choice(ipList)}
	 r = requests.get(baiduURL, headers = headers, proxies = proxies)
	 return r.content

	def getLastURL(rawurl): #get final URL while there're redirects
	 r = requests.get(rawurl)
	 return r.url

	def getAtext(atext): #get the text with <a> and </a>
	 pat = re.compile(r'<a .*?>(.*?)</a>')
	 match = pat.findall(atext)
	 pureText = match[0].replace('<em>', '').replace('</em>', '')
	 return pureText

	def getCacheDate(t): #get the date of cache
	 pat = re.compile(r'<span class="g">.*?(\d{4}-\d{1,2}-\d{1,2}) </span>')
	 match = pat.findall(t)
	 cacheDate = match[0]
	 return cacheDate

	def getRank(checkWord, domain): #main line
	 checkWord = checkWord.replace('\n', '')
	 checkWord = decodeAnyWord(checkWord)
	 baiduURL = createURL(checkWord)
	 cont = getContent(baiduURL)
	 soup = BeautifulSoup.BeautifulSoup(cont)
	 results = soup.findAll('table', {'class': 'result'}) #find all results in this page
	 for result in results:
	 checkData = unicode(result.find('span', {'class': 'g'}))
	 if re.compile(r'^[^/]*%s.*?' %domain).match(checkData): #改正则
	 nowRank = result['id'] #get the rank if match the domain info

	 resLink = result.find('h3').a
	 resURL = resLink['href']
	 domainURL = getLastURL(resURL) #get the target URL
	 resTitle = getAtext(unicode(resLink)) #get the title of the target page

	 rescache = result.find('span', {'class': 'g'})
	 cacheDate = getCacheDate(unicode(rescache)) #get the cache date of the target page

	 res = u'%s, 第%s名, %s, %s, %s' % (checkWord, nowRank, resTitle, cacheDate, domainURL)
	 return res.encode('gb2312')
	 break
	 else:
	 return '>100'

	domain = 'www.douban.com' #set the domain which you want to search.

	

	f = open('r.txt')
	for w in f.readlines():
	 print getRank(w, domain)

	f.close()

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