模拟登陆的问题

CC_Xing

我用了以下方式登陆
1、我用浏览器的cookies先发送GET请求登陆页面，再发送GET请求获得验证码，再手动输入验证码POST，登陆失败。
2、我用浏览器的cookies直接GET验证码，然后手动输入验证码再POST，登陆失败。
3、我先GET登陆页面，获取cookies，然后用这个cookiesGET验证码，然后手动输入验证码，再POST，登陆失败。
都失败了，求解！

CC_Xing

import requests
import urllib.parse

headers = {'Cookie':'PHPSESSID=s6q5osfuun9hppla46k828r032',\
    'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537\
           .36 (KHTML, like Gecko) Chrome/53.0.2785.104 Safar\
           i/537.36 Core/1.53.3103.400 QQBrowser/9.6.11372.400'}



s = requests.Session()
s.headers.update(headers)

r = s.get('http://210.45.242.5:8080/reader/login.php')



r = s.get('http://210.45.242.5:8080/reader/captcha.php')
r = r.content
with open('yzm.jpg','wb') as f:
    f.write(r)
    f.close()

y_pass = input('输入验证码：')
data = {'number':'4354353455',\
        'passwd':'34543534345',\
        'captcha':y_pass,\
        'select':'cert_no'}

data = urllib.parse.urlencode(data).encode('utf-8')

url = 'http://210.45.242.5:8080/reader/redr_verify.php'
r = s.post(url,data)
url = 'http://210.45.242.5:8080/reader/redr_info.php'
r = s.get(url)
html = r.content.decode('utf-8')

print(html)

CC_Xing

我已经登陆成功了，我改用了urllib.request模块而不用requests模块，然后就成功了想知道为什么
以下为修改的代码

import urllib.request
import urllib.parse


headers = {'Cookie':'PHPSESSID=s6q5osfuun9hppla46k828r032',\
    'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537\
           .36 (KHTML, like Gecko) Chrome/53.0.2785.104 Safar\
           i/537.36 Core/1.53.3103.400 QQBrowser/9.6.11372.400'}


def get_page(url,data=None,headers=None):
    req = urllib.request.Request(url,headers=headers)
    page = urllib.request.urlopen(req,data)
    return page

url = 'http://210.45.242.5:8080/reader/login.php'
get_page(url,headers=headers)

url = 'http://210.45.242.5:8080/reader/captcha.php'
page = get_page(url,headers=headers)
r = page.read()

with open('yzm.jpg','wb') as f:
    f.write(r)
    f.close()

y_pass = input('输入验证码：')
data = {'number':'43243242',\
        'passwd':'2342342342',\
        'captcha':y_pass,\
        'select':'cert_no'}
data = urllib.parse.urlencode(data).encode('utf-8')

url = 'http://210.45.242.5:8080/reader/redr_verify.php'
get_page(url,data,headers=headers)

url = 'http://210.45.242.5:8080/reader/redr_info.php'
page = get_page(url,headers=headers)
html = page.read().decode('utf-8')

print(html)
y1=input('exit?1:yes,2:no')
if y1=='1':
    url = 'http://210.45.242.5:8080/reader/logout.php'
    page = get_page(url,headers=headers)
    html = page.read().decode('utf-8')
    print(html)