下载糗事百科的内容_python版

内容导读

互联网集市收集整理的这篇技术教程文章主要介绍了下载糗事百科的内容_python版，小编现在分享给大家，供广大互联网技能从业者学习和参考。文章包含5270字，纯文字阅读大概需要8分钟。

内容图文

#coding:utf-8

import urllib.request
import xml.dom.minidom
import sqlite3
import threading
import time

class logger(object):
def log(self,*msg):
for i in msg:
print(i)

Log = logger()
Log.log('测试下')

class downloader(object):

def __init__(self,url):
self.url = url

def download(self):
Log.log('开始下载',self.url)
try:
content = urllib.request.urlopen(self.url).read()
#req = urllib.request.Request(url)
#response = urllib.request.urlopen(req)
#content = response.read()
Log.log('下载完毕')
return(content)
except:
Log.log('下载出错')
return(None)


class parser(object):

def __init__(self,content):
#获得根节点
self.html = xml.dom.minidom.parseString(content)

def parse(self):
Log.log('开始提取数据')
contents = {'content':'','url':[]}
#获得div节点
divs = self.html.getElementsByTagName('div')
#获得content节点
for div in divs:
if div.hasAttribute('class') and \
div.getAttribute('class') == 'content':
#获得糗事百科的内容
textNode = div.childNodes[0]
qContent = textNode.data
#数据填充
contents['content'] = qContent

#获得上一糗事、下一糗事节点
spans = self.html.getElementsByTagName('span')
for span in spans:
pspan = span.parentNode
if pspan.tagName == 'a':
#pspan为对应的链接,此时需要将对应的地址加入数据库
url = pspan.getAttribute('href')
qid = url[10:][:-4]
#数据填充
contents['url'].append(qid)
Log.log('提取数据完毕')
return(contents)

def downloadPage(qid,db):
url = 'http://www.qiushibaike.com/articles/'+str(qid)+'.htm'
content = downloader(url).download()
if content:
contents = parser(content).parse()
if contents['content']:
db.updateContent(qid,contents['content'])
for i in contents['url']:
db.addQID(i)
if len(contents['url']) == 2:
db.updateStatus(qid,2)

#下载池，表示同时允许下载的链接个数
class downloaderPool(object):
def __init__(self,maxLength=15):
self.downloaders = [None]*maxLength
self.downloadList = []
self.db = None

def setDownloadList(self,downloadList):
self.downloadList = list(set(self.downloadList+downloadList))

def setdb(self,db):
self.db = db

def daemon(self):
#每隔一秒查询线程的状态，为非活动线程则设置为None
Log.log('设置守护进程')
for index,downloader in enumerate(self.downloaders):
if downloader:
if not downloader.isAlive():
Log.log('将下载器置空',index)
self.downloaders[index] = None

#检查线程池状态
for index,downloader in enumerate(self.downloaders):
if not downloader:
qid = self.getQID()
if qid:
#创建线程
t = threading.Thread(target=downloadPage,args=(qid,self.db))
self.downloaders[index] = t
t.start()
t.join()
Log.log('设置下载器',index)
#间隔一秒执行一次
time.sleep(1)

def getQID(self):
try:
tmp = self.downloadList[0]
del self.downloadList[0]
return(tmp)
except:
return(None)

def beginDownload(self):
#创建守护线程
daemon = threading.Thread(target=self.daemon)
daemon.setDaemon(True)
daemon.start()
daemon.join()

def getDownloader(self):
for index,downloader in enumerate(self.downloaders):
if not downloader:
return(index)
return(None)


ADD_Q_ID = 'insert into qiushibaike(id,success) values(?,?)'
UPDATE_Q_CONTENT = 'update qiushibaike set content=? where id=?'
UPDATE_Q_STATUS = 'update qiushibaike set success=? where id=?'
Q_LIST = 'select id from qiushibaike where success=?'
Q_LIST_BY_ID = 'select count(*) from qiushibaike where id=?'
class dbConnect(object):
"""
create table qiushibaike(
id,Integer
content,Varchar
success,Interger
)
#id表示糗事的ID
#content表示糗事的内容
#success表示是否下载成功，当该糗事内容下载完成，且获得ID时表示下载完成
1表示未完成
2表示完成
"""
def __init__(self,dbpath='db.sqlite'):
self.dbpath = dbpath

def addQID(self,qid):
Log.log('插入糗事百科',qid)
#获得连接
cn = sqlite3.connect(self.dbpath)
c = cn.cursor()

try:
#添加内容并提交
c.execute(ADD_Q_ID,(qid,1))
cn.commit()
except:
Log.log('添加ID出错',qid)

#关闭连接
c.close()

cn.close()
Log.log('插入成功')

def updateContent(self,qid,content):
Log.log('更新糗事百科',qid,content)
#获得连接
cn = sqlite3.connect(self.dbpath)
c = cn.cursor()
#添加内容并提交
c.execute(UPDATE_Q_CONTENT,(content,qid))
cn.commit()
#关闭连接
c.close()
cn.close()
Log.log('更新成功')

def updateStatus(self,qid,flag):
Log.log('更新状态',qid,flag)
#获得连接
cn = sqlite3.connect(self.dbpath)
c = cn.cursor()
#添加内容并提交
c.execute(UPDATE_Q_STATUS,(flag,qid))
cn.commit()
#关闭连接
c.close()
cn.close()
Log.log('更新状态成功')

def getList(self,unDonloaded=1):
Log.log('获得列表')
l = []
#获得连接
cn = sqlite3.connect(self.dbpath)
c = cn.cursor()
#获得数据
c.execute(Q_LIST,(unDonloaded,))
rows = c.fetchall()

for i in rows:
l.append(i[0])
#关闭连接
c.close()
cn.close()

Log.log('获得列表成功')
return(l)

class singleDownloader(object):
def __init__(self):
self.downloadList = []

def setdb(self,db):
self.db = db

def setDownloadList(self,downloadList):
self.downloadList = list(set(self.downloadList+downloadList))

def beginDownload(self):
for i in self.downloadList:
downloadPage(i,self.db)

def main():
db = dbConnect('db.sqlite')
#dp = downloaderPool()
#dp.setdb(db)
sp = singleDownloader()
sp.setdb(db)

dp=sp

unDownloadedList = db.getList()
#当还有未下载的糗事时就要继续下载
while(len(unDownloadedList)):
#使用该列表填充下载池
dp.setDownloadList(unDownloadedList)

dp.beginDownload()

time.sleep(1)
#重置参数
unDownloadedList = db.getList()

if __name__ == '__main__':
main()

内容总结

以上是互联网集市为您收集整理的下载糗事百科的内容_python版全部内容，希望文章能够帮你解决下载糗事百科的内容_python版所遇到的程序开发问题。 如果觉得互联网集市技术教程内容还不错，欢迎将互联网集市网站推荐给程序员好友。

内容备注

版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 gblab@vip.qq.com 举报，一经查实，本站将立刻删除。

内容手机端