12306登录爬虫 session版本

import requests

import re

import base64

# 定义session

headers = {

   'User-Agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3664.3 Safari/537.36'

}

session = requests.Session()

session.headers.update(headers)

# 进入主页

login_url = 'https://kyfw.12306.cn/otn/resources/login.html'

res = session.get(login_url)

#验证码图片下载

pic_url = 'https://kyfw.12306.cn/passport/captcha/captcha-image64?login_site=E&module=login&rand=sjrand&1547541563360&callback=jQuery191024188047659526446_1547541316425&_=1547541316427'

res_pic = session.get(pic_url)

pic_data = re.findall(b'image":"(.*?)"',res_pic.content)[0]

# print(res_pic.content)

# print(pic_data)

pic_64d = base64.b64decode(pic_data)

# print(pic_64d)

with open('img/YanZheng.jpg','wb') as f:

    f.write(pic_64d)

# 验证图片

def turn():

    a = input('请输入：')

    numli = a.split(',')

    result = []

    for i in numli:

        i = int(i)

        if i == 1:

            result.append('42,45')

        if i == 2:

            result.append('120,45')

        if i == 3:

            result.append('198,45')

        if i == 4:

            result.append('262,45')

        if i == 5:

            result.append('42,102')

        if i == 6:

            result.append('118,102')

        if i == 7:

            result.append('177,102')

        if i == 8:

            result.append('262,102')

    result = ','.join(result)

    return result

data2 = {

    'callback':'jQuery191046501253654005814_1547541829587',

    'answer':turn(),

    'rand':'sjrand',

    'login_site':'E',

    '_':''

}

# print(data2)

Yan_url = 'https://kyfw.12306.cn/passport/captcha/captcha-check'

res_Yan = session.get(Yan_url,params = data2)

print(res_Yan.url)

res_Yan.encoding = 'utf-8'

print(res_Yan.text)