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spider.py
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spider.py
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#coding:utf-8
from urllib.request import urlopen
from bs4 import BeautifulSoup
import json
import re
import time
import traceback
import socket
import myLog
import numpy as np
tiebaName='王者荣耀'
tiebaHtml='https://tieba.baidu.com/f?kw=%E7%8E%8B%E8%80%85%E8%8D%A3%E8%80%80&ie=utf-8&tab=good'
socket.setdefaulttimeout(15) #http请求超时时间
logger=myLog.getLogging(tiebaName+'log.txt') #log文件
def filterFun(tagname,flist): #多值class过滤器
def listinlist(a,b):
if(type(b)!=list):
return False
for i in a:
if i not in b:
return False
return True
return lambda tag: tag.name==tagname and listinlist(flist,tag.get('class'))
with open(tiebaName+'.txt','w',encoding='utf8') as result:
try:
html=tiebaHtml
resultDict=dict()
#readPageNum=0
#maxreadNum=20
maxDictLen=1000000
while (True):
if len(resultDict)>maxDictLen:
break
#readPageNum=readPageNum+1
logger.warning('读取主页面:'+html)
try:
bsObj = BeautifulSoup(urlopen(html),'lxml',from_encoding="utf-8")
except:
logger.warning('无法获取主页面'+html+' 10秒后重新获取')
time.sleep(10)
bsObj = BeautifulSoup(urlopen(html),'lxml',from_encoding="utf-8")
logger.warning('获取主页面'+html+'成功')
postlist=bsObj.find('ul',{'id':'thread_list'}).find_all(filterFun('li',['j_thread_list','clearfix'])) #获取帖子列表
for post in postlist:
#print(post.prettify())
posthref=post.find(filterFun('div',['threadlist_lz','clearfix'])).div.a.attrs["href"]
if posthref.find('?')!=-1:
posthref=posthref[:posthref.find('?')]
tid=posthref[posthref.rfind('/')+1:]
while(True):
if posthref.find("https://tieba.baidu.com") == -1:
posthref="https://tieba.baidu.com"+posthref
#print(posthref)
try:
try:
postBs = BeautifulSoup(urlopen(posthref),'lxml',from_encoding="utf-8")
except:
logger.warning('无法获取帖子页面'+posthref+' 10秒后重新获取')
time.sleep(10)
postBs = BeautifulSoup(urlopen(posthref),'lxml',from_encoding="utf-8")
logger.warning('获取帖子页面'+posthref+'成功')
logger.info('开始爬取帖子页:'+posthref)
floorlist=postBs.find('div',{'class':'p_postlist','id':'j_p_postlist'}).find_all(filterFun('div',['l_post','l_post_bright','j_l_post','clearfix'])) #读取楼层
for floor in floorlist:
if floor.find('span',{'style':'display:','class':'lzl_link_fold'}) != None :
if floor.find(filterFun('div',['d_post_content','j_d_post_content']))==None:
print(floor.prettify())
postcontent=re.sub('[\t\r\n\s]','',floor.find(filterFun('div',['d_post_content','j_d_post_content'])).get_text())
#print(postcontent)
pid=json.loads(floor.attrs['data-field'])['content']['post_id']
postValue=None
if len(postcontent)>0 and len(postcontent)<50 :
replyDict=dict()
replyPageNum=1
firstReplyHtml='https://tieba.baidu.com/p/comment?tid='+tid+'&pid='+str(pid)+'&pn=1'
try:
replysBs = BeautifulSoup(urlopen(firstReplyHtml),'lxml',from_encoding="utf-8")
except:
logger.warning('无法获取评论页面'+firstReplyHtml+' 5秒后重新获取')
time.sleep(5)
replysBs = BeautifulSoup(urlopen(firstReplyHtml),'lxml',from_encoding="utf-8")
logger.warning('获取评论页面'+firstReplyHtml+'成功')
#print(replysBs.prettify())
pageA = replysBs.find(filterFun('p',['j_pager','l_pager','pager_theme_2']))
#print(pageA)
if pageA != None and len(pageA.find_all('a'))!=0:
replyPageNum=pageA.find_all('a')[-1].attrs['href'][1:]
#print(replyPageNum)
for i in range(1,int(replyPageNum)+1):
replyHtml='https://tieba.baidu.com/p/comment?tid='+tid+'&pid='+str(pid)+'&pn='+str(i)
try:
replysBs = BeautifulSoup(urlopen(replyHtml),'lxml',from_encoding="utf-8")
except:
logger.warning('无法获取评论页面'+replyHtml+' 5秒后重新获取')
time.sleep(5)
replysBs = BeautifulSoup(urlopen(replyHtml),'lxml',from_encoding="utf-8")
logger.warning('获取评论页面'+replyHtml+'成功')
replys=replysBs.find_all('div',{'class':'lzl_cnt'})
for reply in replys:
username=reply.a.get_text()
replycontent=re.sub('[\t\r\n\s]','',reply.span.get_text())
replyFlag=False
if replycontent.find('回复') == 0 and (replycontent.find(':') != -1 or replycontent.find(':') != -1):
if reply.span.find('a') != None:
if replycontent.find(':') != -1:
replycontent=replycontent[replycontent.find(':')+1:]
else:
replycontent=replycontent[replycontent.find(':')+1:]
replyFlag=True
else:
continue
if len(replycontent)>0 and len(replycontent)<50:
replyDict[username]=replycontent
if replyFlag:
replyname=reply.span.find('a').get_text().replace('@','')
if replyname in replyDict.keys():
resultDict[replyDict[replyname]]=replycontent
else:
if postValue == None or abs(len(postValue)-len(postcontent)) > abs(len(replycontent)-len(postcontent)):
postValue=replycontent
resultDict[postcontent]=replycontent
postPagesLi=postBs.find(filterFun('li',['l_pager','pager_theme_5','pb_list_pager']))
if postPagesLi != None:
postPages= postPagesLi.find_all('a')
if len(postPages)>0 and postPages[-2].get_text() == '下一页':
posthref=postPages[-2].attrs['href']
postpagenum=int(posthref[posthref.find('=')+1:])
if(postpagenum>300):
break
else:
break
else:
break
except:
logger.error(traceback.format_exc())
break
logger.info('完成帖子:'+posthref+';当前对话总数为:'+str(len(resultDict)))
nextPage=bsObj.find(filterFun('a',['next','pagination-item']))
if nextPage != None:
html='https:'+nextPage.attrs['href']
else:
break
np.save(tiebaName+'.npy', resultDict)
for d,x in resultDict.items():
result.write(d+"\t"+x+"\n")
logger.warning('成功抓取所有帖子!')
except:
logger.error(traceback.format_exc())
np.save(tiebaName+'.npy', resultDict)
for d,x in resultDict.items():
result.write(d+"\t"+x+"\n")
logger.warning('部分帖子抓取失败,已为您保存文件!')