本文主要是介绍爬虫 访问 重试，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
不知道为啥，以前一直好好的，现在访问链接经常报错，所以加了错误重试
# coding:utf-8
import requests
import http.cookiejar
import re
import sys
import smtplib
import time
from email.mime.text import MIMETextretries1=30
_to = "xxxxxxx@360.cn"class SendQqMail:def getqqmail(self, retries):_user = "xxxxxxxx@qq.com"_pwd = "xxxxxxxxxxxxxxxxx"msg = MIMEText(listitem1)msg["Subject"] = listitem1msg["From"] = _usermsg["To"] = _totry:s = smtplib.SMTP_SSL("smtp.qq.com", 465)s.login(_user, _pwd)s.sendmail(_user, _to, msg.as_string())s.quit()print "Send QQ Email Success!"except smtplib.SMTPException, e:print "retry.QQ mail..............." % eif retries > 0:return self.getqqmail(retries - 1)else:print "Send QQ Email Falied,%s" % eclass Send163Mail:def get163mail(self, retries):_user = "xxxxxxxxxxxxxx@163.com"_pwd = "xxxxxxxxxxxxxxxxxxxxx"msg = MIMEText(listitem1)msg["Subject"] = listitem1msg["From"] = _usermsg["To"] = _totry:s = smtplib.SMTP_SSL("smtp.163.com", 465)s.login(_user, _pwd)s.sendmail(_user, _to, msg.as_string())s.quit()print "Send 163 Email Success!"except smtplib.SMTPException, e:print "retry.163mail..............." % eif retries > 0:return self.get163mail(retries - 1)else:print "Send 163 Email Falied,%s" % eclass Urlrequest:def get(self, retries):try:purposurl1 = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'resp1 = session.get(purposurl1, headers=headers, allow_redirects=False)buffer1 = str(resp1.text)getarticlelist1 = re.compile(r'<td style="overflow:hidden;word-break:break-all;word-wrap:break-word;"\s*([\S\s]*?)\s*</td>')pagemsg1 = re.findall(getarticlelist1, buffer1)except Exception, what:#print what, reqif retries > 0:return self.get(retries - 1)else:print 'visit url Failed',return pagemsg1headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:48.0) Gecko/20100101 Firefox/48.0'}
filename = 'cookie'# 建立一个会话，可以把同一用户的不同请求联系起来；直到会话结束都会自动处理cookies
session = requests.Session()
# 建立LWPCookieJar实例，可以存Set-Cookie3类型的文件。
session.cookies = http.cookiejar.LWPCookieJar(filename)
# 若本地有cookie则不用再post数据了
try:session.cookies.load(filename=filename, ignore_discard=True)print ('load local cookies successed')
except:print('Cookies load failed！')print('attemptting to login...')
url = 'https://xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'
data = {'user': 'zhangkun-s','passwd': 'zk584807419360!!!','ref': 'http:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx','tag': '','src': 'qihoo'}
result = session.post(url, data=data, headers=headers)
# 保存cookie到本地
session.cookies.save(ignore_discard=True, ignore_expires=True)reload(sys)
sys.setdefaultencoding("utf-8")get_url = 'http://xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'
# allow_redirects=False 禁止重定向
resp = session.get(get_url, headers=headers, allow_redirects=False)purposurl = 'http://xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'
resp = session.get(purposurl, headers=headers, allow_redirects=False)
buffer = str(resp.text)
getarticlelist = re.compile(r'<td style="overflow:hidden;word-break:break-all;word-wrap:break-word;"\s*([\S\s]*?)\s*</td>')
pagemsg = re.findall(getarticlelist,buffer)
print ('system boot successed')
while True:time.sleep(60)buff = Urlrequest()pagemsg1 = buff.get(retries1)for listitem1 in pagemsg1:if listitem1 in pagemsg:passelse:if '[fix_error]' in listitem1 or '[init_error]' in listitem1 or '[exit_unexpect]' in listitem1 or '[android]' in listitem1 or '[FIX_ERROR]' in listitem1 or '[INIT_ERROR]' in listitem1 or '[EXIT_UNEXPECT]' in listitem1 or '[ANDROID]' in listitem1:pagemsg.append(listitem1)else:pagemsg.append(listitem1)try:print 'find a new feedback'qqsendmailer = SendQqMail()time.sleep(5)qqsendmailer.getqqmail(10)except:print "QQ mail try five times fail,change 163mail"neteasysendmailer = Send163Mail()time.sleep(5)neteasysendmailer.get163mail(10)这篇关于爬虫 访问 重试的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！
