__author__ = 'CQC'
# -*- coding:utf-8 -*-
import urllib
try:
    import urllib.request as urllib2
    import urllib.parse 
    from requests.auth import HTTPBasicAuth
except ImportError:
    import urllib2
import re

#gbkTypeStr = unicodeTypeStr.encode("GBK", 'ignore');
#gbkTypeStr = unicodeTypeStr.encode("GB18030", 'ignore');
import ssl
ssl._create_default_https_context = ssl._create_unverified_context


#处理页面标签类
class Tool:
    #去除img标签,7位长空格
    removeImg = re.compile('<img.*?>| {7}|')
    #删除超链接标签
    removeAddr = re.compile('<a.*?>|</a>')
    #把换行的标签换为\n
    replaceLine = re.compile('<tr>|<div>|</div>|</p>')
    #将表格制表<td>替换为\t
    replaceTD= re.compile('<td>')
    #把段落开头换为\n加空两格
    replacePara = re.compile('<p.*?>')
    #将换行符或双换行符替换为\n
    replaceBR = re.compile('<br><br>|<br>')
    #将其余标签剔除
    removeExtraTag = re.compile('<.*?>')
    def replace(self,x):
        x = re.sub(self.removeImg,"",x)
        x = re.sub(self.removeAddr,"",x)
        x = re.sub(self.replaceLine,"\n",x)
        x = re.sub(self.replaceTD,"\t",x)
        x = re.sub(self.replacePara,"\n    ",x)
        x = re.sub(self.replaceBR,"\n",x)
        x = re.sub(self.removeExtraTag,"",x)
        #strip()将前后多余内容删除
        return x.strip()

#百度贴吧爬虫类
class BDTB:

    #初始化，传入基地址，是否只看楼主的参数
    def __init__(self,baseUrl,seeLZ):
        self.baseURL = baseUrl
        self.seeLZ = '?see_lz='+str(seeLZ)
        self.user_agent = 'Mozilla/4.0 (compatible; MSIE 5.5; Windows NT)'
        #初始化headers
        self.headers = { 'User-Agent' : self.user_agent }
        
        self.tool = Tool()

    #传入页码，获取该页帖子的代码
    def getPage(self,pageNum):
        try:
            url = self.baseURL+ self.seeLZ + '&pn=' + str(pageNum)
            request = urllib2.Request(url,headers = self.headers)
            response = urllib2.urlopen(request)
            #print(response.read().decode('utf-8'))
            return response.read().decode('utf-8')
        except urllib.error.URLError as e:
            if hasattr(e,"reason"):
                print(u"连接百度贴吧失败,错误原因",e.reason)
                return None
    #获取帖子标题
    def getTitle(self):
        page = self.getPage(1)
        pattern = re.compile('<h1 class="core_title_txt.*?>(.*?)</h1>',re.S)
        result = re.search(pattern,page)
        if result:
            #print result.group(1)  #测试输出
            return result.group(1).strip()
        else:
            return None
    #获取帖子一共有多少页
    def getPageNum(self):
        page = self.getPage(1)
        pattern = re.compile('<li class="l_reply_num.*?</span>.*?<span.*?>(.*?)</span>',re.S)
        result = re.search(pattern,page)
        if result:
            #print result.group(1)  #测试输出
            return result.group(1).strip()
        else:
            return None

    """
        #获取每一层楼的内容,传入页面内容
        def getContent(self,page):
            pattern = re.compile('<div id="post_content_.*?>(.*?)</div>',re.S)
            items = re.findall(pattern,page)
            for item in items:
                print(item)
        """
    #获取每一层楼的内容,传入页面内容
    def getContent(self,page):
        pattern = re.compile('<div id="post_content_.*?>(.*?)</div>',re.S)
        items = re.findall(pattern,page)
        floor = 1
        for item in items:
            print(floor,u"楼------------------------------------------------------------------------------------------------------------------------------------\n")
            #print(item)
            print(self.tool.replace(item))
            floor += 1

baseURL = 'https://tieba.baidu.com/p/3138733512'
bdtb = BDTB(baseURL,1)
bdtb.getContent(bdtb.getPage(1))