Use Python to crawl all the data on the home page of the blog, and constantly crawl the newly announced content into MongoDB

The original address: Use Python to crawl all the data on the home page of the blog, and regularly continue to crawl new published content into MongoDB

Dependency Package: 1.jieba2.pymongo3.htmlparser#-*-coding:utf-8-*-"" "@author: Jiangfuqiang" "" from Htmlparser Import Htmlparserimport reimport timefrom datetime import dateimport pymongoimport urllib2import sysimport tracebackimport Jieb adefault_encoding = ' Utf-8 ' if sys.getdefaultencoding ()! = default_encoding:reload (SYS) sys.setdefaultencoding (defau        lt_encoding) isexist = Falseclass Fetchcnblog (htmlparser): Def __init__ (self, id): htmlparser.__init__ (self) Self.result = [] Self.data = {} Self.istitlelink = False self.id = id self.issummary = Fals E Self.ispostitem = False Self.isarticleview = False def handle_data (self, data): if Self.istitlel Ink and self.ispostitem:self.data[' title '] = Data Self.istitlelink = False elif self.issumma ry and Self.isPostItem:data = Data.strip () if data:self.data[' desc '] = data def       Handle_starttag (self, Tag, attrs): if tag = = ' A ': for key, value in attrs:if key = = ' class ': if value = = ' Titl                        Elnk ': Self.istitlelink = True elif value = = ' Gray ' and Self.isarticleview: Self.isarticleview = False for key, value in Attrs:i F key = = ' href ': self.data[' readmorelink ' = value reg = ' d+                                ' result = Re.search (reg,value) Self.ispostitem = False                                If result:self.data[' id '] = Int (Result.group ())                                Else:self.data = {} return                                    If self.data[' id '] <= self.id:self.data = {}Isexist = True return Else:                                    self.data[' srouce ' = "www.cnblogs.com" self.data[' source_key '] = ' cnblogs ' self.data[' fetchtime ' = str (date.today ()) self.data[' Ke                                    Yword '] = ",". Join (Jieba.cut (self.data[' title ')) Self.result.append (Self.data) Self.data = {} elif tag = = ' P ': for key, value in Attrs:if K            EY = = ' class ' and value = = ' Post_item_summary ': self.issummary = True elif Tag = = ' img ': For key, value in attrs:if key = = ' class ' and value = = ' PFS ': for key, value in ATT Rs:if key = = ' src ': self.data[' imgsrc ' = value elif tag = = ' div ': for Key, VAlue in attrs:if key = = ' class ' and value = = ' Post_item_foot ': self.issummary = False elif key = = ' class ' and value = = ' Post_item ': Self.ispostitem = True elif Tag = = '                    Span ': For key, value in attrs:if key = = ' class ' and value = = ' Article_view ': Self.isarticleview = True def getresult (self): return self.resultif __name__ = = "__main__": con = Pymongo. Connection (' localhost ', 27017) db = Con.blog Fetchblog = db.fetch_blog record = Db.record URL = "http://www.cn blogs.com/sitehome/p/%d "Count = 1 flag = False headers={' user-agent ': ' mozilla/5.0 (Windows; U; wind ows NT 6.1; en-us.  rv:1.9.1.6) gecko/20091201 firefox/3.5.6 '} reco = Record.find_one ({"type": ' Cnblogs '}) id = 0 if Reco:id = reco[' Maxid '] while isexist = = False:try:req = Urllib2. Request (url%count,headers=headers) reQuest = Urllib2.urlopen (req) data = Request.read () FJ = Fetchcnblog (ID) fj.feed (data)                result = Fj.getresult () If Len (result) < 1:isexist = True Else: If flag = = False:flag = True dic = result[0] id = int (dic[ ' ID ']) record.update ({"type": ' Cnblogs '},{"$set": {' Maxid ': id}},true,false) result.reverse                () for Doc in Result:fetchblog.insert (DOC) print "page is%d"%count            Count + = 1 time.sleep (5) except Exception, E:traceback.print_exc () Print "Parse Error", the E program is assumed to run under Linux,mac. When you can set a timer task in crontab-e, assuming that you run it in Windows, you can add

Use Python to crawl all the data on the home page of the blog, and constantly crawl the newly announced content into MongoDB