定向爬虫实战笔记

定向爬虫实战笔记

流程图如下：

来自追女神助手(痴汉)v0.1：

1.#-*-coding:utf8-*-2.3.import smtplib4.from email.mime.text import MIMEText5.import requests6.from lxml import etree7.import os8.import time9.import sys10.reload(sys)11.sys.setdefaultencoding(‘utf-8‘)12.13.14.15.class mailhelper(object):16.    ‘‘‘17.    这个类实现发送邮件的功能18.    ‘‘‘19.    def __init__(self):20.21.        self.mail_host="smtp.xxxx.com"  #设置服务器22.        self.mail_user="xxxx"    #用户名23.        self.mail_pass="xxxx"   #密码24.        self.mail_postfix="xxxx.com"  #发件箱的后缀25.26.    def send_mail(self,to_list,sub,content):27.        me="xxoohelper"+"<"+self.mail_user+"@"+self.mail_postfix+">"28.        msg = MIMEText(content,_subtype=‘plain‘,_charset=‘utf-8‘)29.        msg[‘Subject‘] = sub30.        msg[‘From‘] = me31.        msg[‘To‘] = ";".join(to_list)32.        try:33.            server = smtplib.SMTP()34.            server.connect(self.mail_host)35.            server.login(self.mail_user,self.mail_pass)36.            server.sendmail(me, to_list, msg.as_string())37.            server.close()38.            return True39.        except Exception, e:40.            print str(e)41.            return False42.43.class xxoohelper(object):44.    ‘‘‘45.    这个类实现将爬取微博第一条内容46.    ‘‘‘47.    def __init__(self):48.        self.url = ‘http://weibo.cn/u/xxxxxxx‘ #请输入准备抓取的微博地址49.        self.url_login = ‘https://login.weibo.cn/login/‘50.        self.new_url = self.url_login51.52.    def getSource(self):53.        html = requests.get(self.url).content54.        return html55.56.    def getData(self,html):57.        selector = etree.HTML(html)58.        password = selector.xpath(‘//input[@type="password"]/@name‘)[0]59.        vk = selector.xpath(‘//input[@name="vk"]/@value‘)[0]60.        action = selector.xpath(‘//form[@method="post"]/@action‘)[0]61.        self.new_url = self.url_login + action62.        data = {63.            ‘mobile‘ : ‘[email protected]‘,64.             password : ‘xxxxxx‘,65.            ‘remember‘ : ‘on‘,66.            ‘backURL‘ : ‘http://weibo.cn/u/xxxxxx‘, #此处请修改为微博地址67.            ‘backTitle‘ : u‘微博‘,68.            ‘tryCount‘ : ‘‘,69.            ‘vk‘ : vk,70.            ‘submit‘ : u‘登录‘71.            }72.        return data73.74.    def getContent(self,data):75.        newhtml = requests.post(self.new_url,data=data).content76.        new_selector = etree.HTML(newhtml)77.        content = new_selector.xpath(‘//span[@class="ctt"]‘)78.        newcontent = unicode(content[2].xpath(‘string(.)‘)).replace(‘http://‘,‘‘)79.        sendtime = new_selector.xpath(‘//span[@class="ct"]/text()‘)[0]80.        sendtext = newcontent + sendtime81.        return sendtext82.83.    def tosave(self,text):84.        f= open(‘weibo.txt‘,‘a‘)85.        f.write(text + ‘\n‘)86.        f.close()87.88.    def tocheck(self,data):89.        if not os.path.exists(‘weibo.txt‘):90.            return True91.        else:92.            f = open(‘weibo.txt‘, ‘r‘)93.            existweibo = f.readlines()94.            if data + ‘\n‘ in existweibo:95.                return False96.            else:97.                return True98.99.if __name__ == ‘__main__‘:100.    mailto_list=[‘[email protected]‘] #此处填写接收邮件的邮箱101.    helper = xxoohelper()102.    while True:103.        source = helper.getSource()104.        data = helper.getData(source)105.        content = helper.getContent(data)106.        if helper.tocheck(content):107.            if mailhelper().send_mail(mailto_list,u"女神更新啦",content):108.                print u"发送成功"109.            else:110.                print u"发送失败"111.            helper.tosave(content)112.            print content113.        else:114.            print u‘pass‘115.        time.sleep(30)