python抓取最新博客内容并生成Rss

# -*- coding: utf-8 -*-from bs4 import BeautifulSoupimport urllib2import datetimeimport timeimport PyRSS2Genfrom email.Utils import formatdateimport reimport sysimport osreload(sys)sys.setdefaultencoding('utf-8')class RssSpider(): def __init__(self): self.myrss = PyRSS2Gen.RSS2(title='OSChina',link='http://my.oschina.net',description=str(datetime.date.today()),pubDate=datetime.datetime.now(), lastBuildDate = datetime.datetime.now(),items=[])self.xmlpath=r'/var/www/myrss/oschina.xml'self.baseurl="http://www.oschina.net/blog" #if os.path.isfile(self.xmlpath):#os.remove(self.xmlpath) def useragent(self,url): i_headers = {"User-Agent":"Mozilla/5.0 (Windows NT 6.1; WOW64)  AppleWebKit/537.36 (KHTML, like Gecko) Chrome/36.0.1985.125 Safari/537.36", "Referer": 'http://baidu.com/'} req = urllib2.Request(url, headers=i_headers) html = urllib2.urlopen(req).read() return html def enterpage(self,url): pattern = re.compile(r'd{4}Sd{2}Sd{2}sd{2}Sd{2}')rsp=self.useragent(url)soup=BeautifulSoup(rsp)timespan=soup.find('div',{'class':'BlogStat'})timespan=str(timespan).strip().replace('n','').decode('utf-8')match=re.search(r'd{4}Sd{2}Sd{2}sd{2}Sd{2}',timespan)timestr=str(datetime.date.today()) if match:timestr=match.group() #print timestrititle=soup.title.stringdiv=soup.find('div',{'class':'BlogContent'})rss=PyRSS2Gen.RSSItem(title=ititle,link=url, description = str(div), pubDate = timestr) return rss def getcontent(self):rsp=self.useragent(self.baseurl)soup=BeautifulSoup(rsp)ul=soup.find('div',{'id':'RecentBlogs'}) for li in ul.findAll('li'):div=li.find('div') if div is not None:alink=div.find('a') if alink is not None:link=alink.get('href') print linkhtml=self.enterpage(link)self.myrss.items.append(html) def SaveRssFile(self,filename):finallxml=self.myrss.to_xml(encoding='utf-8')file=open(self.xmlpath,'w')file.writelines(finallxml)file.close()if __name__=='__main__':rssSpider=RssSpider()rssSpider.getcontent()rssSpider.SaveRssFile('oschina.xml')