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python实现自动登录

yipeiwu_com6年前 (2020-03-06)Python基础

利用python，可以实现填充网页表单，从而自动登录WEB门户。

（注意：以下内容只针对python3）

环境准备：

（1）安装python
（2）安装splinter，下载源码 python setup install

#coding=utf-8
import time
from splinter import Browser
 
def login_mail(url):
  browser = Browser()
  #login 163 email websize
  browser.visit(url)
  #wait web element loading
  #fill in account and password
  browser.find_by_id('username').fill('你的用户名称')
  browser.find_by_id('password').fill('你的密码')
  #click the button of login
  browser.find_by_id('loginBtn').click()
  time.sleep(5)
  #close the window of brower
  browser.quit()
 
if __name__ == '__main__':
  mail_addr ='http://reg.163.com/'
  login_mail(mail_addr)

Tips：

（1）如果需要修改web的html属性，可以使用：js

browser.execute_script('document.getElementById("Html属性ID").value = "在此提供默认值"')

（2）browser = Browser()

不指定的情况下，浏览器驱动是火狐（Firefox），可以指定其他：browser = Browser(‘chrome')，需要下载对应的驱动程序

1.python3浏览页面

#coding=utf-8
import urllib.request
import time
#在请求加上头信息，伪装成浏览器访问
headers = {'User-Agent':'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:23.0) Gecko/20100101 Firefox/23.0'}
chaper_url='http://XXX'
 
vist_num=1
while vist_num<1000:
 if vist_num%50==0:
  time.sleep(5)
 print("This is the 【 "+str(vist_num)+" 】次尝试")
 req = urllib.request.Request(url=chaper_url, headers=headers) 
 urllib.request.urlopen(req).read() #.decode('utf-8')
 vist_num+=1

2.python 多线程

#coding=utf-8
import threading #导入threading包
from time import sleep
import time
 
def fun1(): 
  print ("Task 1 executed." )
  time.sleep(3)
  print ("Task 1 end." )
 
def fun2():
  print ("Task 2 executed." )
  time.sleep(5)
  print ("Task 2 end." )
  
threads = [] 
t1 = threading.Thread(target=fun1) 
threads.append(t1)
t2 = threading.Thread(target=fun2)
threads.append(t2)
 
for t in threads:
  # t.setDaemon(True) 
  t.start()

3.利用python下载百度图片

#coding=utf-8
import urllib.request
import re
 
def getHtml(url):
  page = urllib.request.urlopen(url)
  html = page.read()
  return html
 
def getImg(html):
  reg = r'src="(.+?\.jpg)"'
  imgre = re.compile(reg)
  html=html.decode('utf-8')
  imglist = re.findall(imgre,html)
  x = 0
  for imgurl in imglist:
    urllib.request.urlretrieve(imgurl,'%s.jpg' % x)
    x+=1
    print(str(x))

html = getHtml("http://image.baidu.com/channel?c=%E6%91%84%E5%BD%B1&t=%E5%85%A8%E9%83%A8&s=0")
 
print(getImg(html))

效果：