函数很简单，这里主要分享流程

目标

这是一个网站 的注册页面

找接口

先在抓包工具或者浏览器检查界面找到验证码的位置

测试

测试下重放，发现数据可以正常发送，那就拷贝headers里面的一些参数和cookie到Postman做测试

逐步添加headers信息直到能拿到数据

组合带带弟弟编码

拷贝python-requests代码到编译器，修改下即可
为什么是带带弟弟，因为他就叫这个名字

get_time_stamp13函数用于生成13位时间戳，作为文件名，文件会保存到本地进行比较
ddddocr的用法很简单，生成类的实例之后可以直接用，读取的是二进制数据，但是要注意这个包的安装必须装到主环境，虚拟环境安装会出错

with open(filename,'wb') as f:
    f.write(response.content)
ocr=ddddocr.DdddOcr()
decode_1=ocr.classification(response.content)

requests的url可以将url的https改为http，可以解决连接错误。

from datetime import datetime
import re
import time

import ddddocr
import requests


def get_time_stamp13():
  t=datetime.now()
  n3=str(t)[-6:-3]
  datetime_str = datetime.strftime(datetime.now(), '%Y-%m-%d %H:%M:%S')
  datetime_obj = datetime.strptime(datetime_str, '%Y-%m-%d %H:%M:%S')
  # 10位，时间点相当于从1.1开始的当年时间编号
  date_stamp = str(int(time.mktime(datetime_obj.timetuple())))
  # 3位，微秒
  date_stamp = date_stamp + n3
  return int(date_stamp)

def readimage():
    ocr=ddddocr.DdddOcr()
    res=requests.get()
    ocr.classification(res.content)
import requests

url = "http://passport.tuniu.com/ajax/captcha/v/1447825328.4607"

payload={}
headers = {
  'Cookie': 'tuniu_partner=MTU1OCwwLCw2ZGYxN2I2Y2Q1NDQxMzk4OGU1OTllYzE0NzQzNjlhZA%3D%3D; tuniuuser_citycode=MTYxMQ%3D%3D; p_phone_400=4007-999-999; p_phone_level=0; p_global_phone=%2B0086-25-8685-9999; _tacau=MCwzOGRjOGU0NC1hNjZlLTJiODctODRiZC0yOWJkMzBmMDY1ZGQs; udid=tn-100-1635931987040-0d25a6f1-3c89-11ec-b13c-a11f56f54905; _tact=NzUzOGJiOGQtZDMyNS04YjE3LTU2M2ItMmI1NmU1ZGY2NmM0; _tacz2=taccsr%3Dbaidu%7Ctacccn%3D%28cpc%29%7Ctaccmd%3DSE%7Ctaccct%3D%28none%29%7Ctaccrt%3D%28none%29; _taca=1635931985752.1635931985752.1635931985752.1; _tacb=ZDQwMThjYTItZGQ0OC03ZWQwLTYyZjEtYThkNGE2NzZiMWZm; _tacc=1; PageSwitch=1%2C213612736; _pzfxuvpc=1635931987031%7C4911940592134903408%7C1%7C1635931987038%7C1%7C%7C9096756265259129179; _pzfxsfc=u10316631.k217654437386.a45692303164.pb; _ga=GA1.2.1140816901.1635931987; _gid=GA1.2.227309581.1635931987; Hm_lvt_fe3fbe4228e14b1544525f058df92f91=1635931987; Hm_lpvt_fe3fbe4228e14b1544525f058df92f91=1635931987; OLBSESSID=qv6rqvguelg9jpe5pof87cabn7; PcHomeVisit=1; smidV2=202111031733099a86aac40b61c24bf383873ee97d86ca006e90c6558c92510; MOBILE_APP_SETTING_OPEN-154=1; acw_tc=2f624a4316359319997322452e655bb2fde9fcef4deb18f95221f62773e160; PASSPORTSESSID=84d706599d4fca2731ebbd62df9eebae; tuniu-assist={%22show%22:false%2C%22audio%22:false%2C%22speed%22:%22middle%22%2C%22zomm%22:1%2C%22cursor%22:false%2C%22pointer%22:false%2C%22bigtext%22:false%2C%22overead%22:false%2C%22bgcolor%22:false}; _uab_collina=163593199983111888803387; fp_ver=4.7.3; BSFIT_EXPIRATION=1637216066128; BSFIT_OkLJUJ=FHMohPnE-rBR2cxk5jzg-YgPjJrYrLan; BSFIT_DEVICEID=HXbehRnlOkhIHzzo4pE4Mvu9g71_5oAA3aRMpu1IQLZ7EKVSLjgOHe8N9LzewBS-FGAxhH684Fj-c0xfjHKuw84BkZ82bilae-hKd8cUpgBLHGjusXR_NmvBdN33AkzTOYGtRhNmd6FVUYQQgmIePfwyXMUB7XOJ; MOBILE_APP_SETTING_STATE-154=CLOSE; ssxmod_itna=mq0xnCyD9DzOG780P7Ki=w3iIMKDuv2cnK2eDsimDSxGKidDqxBWqQRHq7y5x0=AUlERm3dFGSy44fBCxc+dxVGbyIKDU4i8DCwuwKD4+KGwD0eG+DD4DWDmWHDnxAQDjcKGWDbO=DmDGAc3qDgDYQDGup6D7QDIk=q4gwcDCd4EwrgfDiYG7=DjurD/S+rEerb=ZwZiEQDzMaDtutSFdtKx0p1QDp=QAhLtOqaK0DwXB44fD7Y4g4qm8O57tS=GB84Yr4jmBqDGROoDU4xD; ssxmod_itna2=mq0xnCyD9DzOG780P7Ki=w3iIMKDuv2cnKxikviDyiQD05x2K03KaLnkaisXD6mq4=YKD4g+t+iDRwFP+aDUO7bFT=ikx2a557wB4GkLrx79Neonm7Bunbk/yiS1vy/SZndUl3UU//uqVW344LR5ZnrfVKgi6lgXtzCxwbkXU8C0dw+EV38w550u9KDKP=YWoqZv8+wch3Tjsb3Ll/R3M9hYON8Yhjw48j89kWwLwYGABIaBzWkfnD/6zEPXOVRFMRodiGZLRSMv30c62dNXqF4g2TSdg9Yd6N4fgvqffhftGjRCUcgqu4sl+sN2CNk8xrd5CYXutc+1cw1Oh7lkY6bOYAYCBPaiOV7xp2YwGKxoHX0Dsg5eGt+E5kOtd7dHOPfe4k78BjmKGOXD4iEauqATqAuntD=HLgzpmPS0YLjKVDCPrqbrvkB1bg4E2eemvNrOPgPHDsm25diYXkmujQ1hmtQKGhPQOYEophfUqT3g1L/et5lXylECisXuPQSX0Y=yOP9xIRb3ugwYhYvRDOOC9bEaDIHK8wqAmwY+kH7eG5o5wwLsBeD7QTj+/GiNkGa0a4eks/d8X+RlTs3=zHqqYT1Twa0kZZxYDGcDG7rR91Gx/eediDD=; PASSPORTSESSID=vlhu3brl4qqfkm1gip2enh1np0; acw_tc=2f624a3816359329976566427e1b7363f6a399a1c74d301ce47383a4c22a08',
  'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.36',
  'sec-fetch-dest': 'image',
  'sec-fetch-mode': 'no-cors',
  'sec-fetch-site': 'same-origin',
  'referer': 'https://passport.tuniu.com/register'
}

response = requests.request("GET", url, headers=headers, data=payload)
filename='code/'+str(get_time_stamp13())+'.jpg'
with open(filename,'wb') as f:
    f.write(response.content)
ocr=ddddocr.DdddOcr()
decode_1=ocr.classification(response.content)
print(decode_1)

改用postman里面的另外一个Python-http.client的代码即可正常访问ssl连接

from datetime import datetime
import re
import time

import ddddocr
import requests


def get_time_stamp13():
  t=datetime.now()
  n3=str(t)[-6:-3]
  datetime_str = datetime.strftime(datetime.now(), '%Y-%m-%d %H:%M:%S')
  datetime_obj = datetime.strptime(datetime_str, '%Y-%m-%d %H:%M:%S')
  # 10位，时间点相当于从1.1开始的当年时间编号
  date_stamp = str(int(time.mktime(datetime_obj.timetuple())))
  # 3位，微秒
  date_stamp = date_stamp + n3
  return int(date_stamp)

def readimage():
    ocr=ddddocr.DdddOcr()
    res=requests.get()
    ocr.classification(res.content)


import http.client

conn = http.client.HTTPSConnection("passport.tuniu.com")
payload = ''
headers = {
  'Cookie': 'tuniu_partner=MTU1OCwwLCw2ZGYxN2I2Y2Q1NDQxMzk4OGU1OTllYzE0NzQzNjlhZA%3D%3D; tuniuuser_citycode=MTYxMQ%3D%3D; p_phone_400=4007-999-999; p_phone_level=0; p_global_phone=%2B0086-25-8685-9999; _tacau=MCwzOGRjOGU0NC1hNjZlLTJiODctODRiZC0yOWJkMzBmMDY1ZGQs; udid=tn-100-1635931987040-0d25a6f1-3c89-11ec-b13c-a11f56f54905; _tact=NzUzOGJiOGQtZDMyNS04YjE3LTU2M2ItMmI1NmU1ZGY2NmM0; _tacz2=taccsr%3Dbaidu%7Ctacccn%3D%28cpc%29%7Ctaccmd%3DSE%7Ctaccct%3D%28none%29%7Ctaccrt%3D%28none%29; _taca=1635931985752.1635931985752.1635931985752.1; _tacb=ZDQwMThjYTItZGQ0OC03ZWQwLTYyZjEtYThkNGE2NzZiMWZm; _tacc=1; PageSwitch=1%2C213612736; _pzfxuvpc=1635931987031%7C4911940592134903408%7C1%7C1635931987038%7C1%7C%7C9096756265259129179; _pzfxsfc=u10316631.k217654437386.a45692303164.pb; _ga=GA1.2.1140816901.1635931987; _gid=GA1.2.227309581.1635931987; Hm_lvt_fe3fbe4228e14b1544525f058df92f91=1635931987; Hm_lpvt_fe3fbe4228e14b1544525f058df92f91=1635931987; OLBSESSID=qv6rqvguelg9jpe5pof87cabn7; PcHomeVisit=1; smidV2=202111031733099a86aac40b61c24bf383873ee97d86ca006e90c6558c92510; MOBILE_APP_SETTING_OPEN-154=1; acw_tc=2f624a4316359319997322452e655bb2fde9fcef4deb18f95221f62773e160; PASSPORTSESSID=84d706599d4fca2731ebbd62df9eebae; tuniu-assist={%22show%22:false%2C%22audio%22:false%2C%22speed%22:%22middle%22%2C%22zomm%22:1%2C%22cursor%22:false%2C%22pointer%22:false%2C%22bigtext%22:false%2C%22overead%22:false%2C%22bgcolor%22:false}; _uab_collina=163593199983111888803387; fp_ver=4.7.3; BSFIT_EXPIRATION=1637216066128; BSFIT_OkLJUJ=FHMohPnE-rBR2cxk5jzg-YgPjJrYrLan; BSFIT_DEVICEID=HXbehRnlOkhIHzzo4pE4Mvu9g71_5oAA3aRMpu1IQLZ7EKVSLjgOHe8N9LzewBS-FGAxhH684Fj-c0xfjHKuw84BkZ82bilae-hKd8cUpgBLHGjusXR_NmvBdN33AkzTOYGtRhNmd6FVUYQQgmIePfwyXMUB7XOJ; MOBILE_APP_SETTING_STATE-154=CLOSE; ssxmod_itna=mq0xnCyD9DzOG780P7Ki=w3iIMKDuv2cnK2eDsimDSxGKidDqxBWqQRHq7y5x0=AUlERm3dFGSy44fBCxc+dxVGbyIKDU4i8DCwuwKD4+KGwD0eG+DD4DWDmWHDnxAQDjcKGWDbO=DmDGAc3qDgDYQDGup6D7QDIk=q4gwcDCd4EwrgfDiYG7=DjurD/S+rEerb=ZwZiEQDzMaDtutSFdtKx0p1QDp=QAhLtOqaK0DwXB44fD7Y4g4qm8O57tS=GB84Yr4jmBqDGROoDU4xD; ssxmod_itna2=mq0xnCyD9DzOG780P7Ki=w3iIMKDuv2cnKxikviDyiQD05x2K03KaLnkaisXD6mq4=YKD4g+t+iDRwFP+aDUO7bFT=ikx2a557wB4GkLrx79Neonm7Bunbk/yiS1vy/SZndUl3UU//uqVW344LR5ZnrfVKgi6lgXtzCxwbkXU8C0dw+EV38w550u9KDKP=YWoqZv8+wch3Tjsb3Ll/R3M9hYON8Yhjw48j89kWwLwYGABIaBzWkfnD/6zEPXOVRFMRodiGZLRSMv30c62dNXqF4g2TSdg9Yd6N4fgvqffhftGjRCUcgqu4sl+sN2CNk8xrd5CYXutc+1cw1Oh7lkY6bOYAYCBPaiOV7xp2YwGKxoHX0Dsg5eGt+E5kOtd7dHOPfe4k78BjmKGOXD4iEauqATqAuntD=HLgzpmPS0YLjKVDCPrqbrvkB1bg4E2eemvNrOPgPHDsm25diYXkmujQ1hmtQKGhPQOYEophfUqT3g1L/et5lXylECisXuPQSX0Y=yOP9xIRb3ugwYhYvRDOOC9bEaDIHK8wqAmwY+kH7eG5o5wwLsBeD7QTj+/GiNkGa0a4eks/d8X+RlTs3=zHqqYT1Twa0kZZxYDGcDG7rR91Gx/eediDD=; PASSPORTSESSID=vlhu3brl4qqfkm1gip2enh1np0; acw_tc=2f624a3816359329976566427e1b7363f6a399a1c74d301ce47383a4c22a08',
  'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.36',
  'sec-fetch-dest': 'image',
  'sec-fetch-mode': 'no-cors',
  'sec-fetch-site': 'same-origin',
  'referer': 'https://passport.tuniu.com/register'
}
conn.request("GET", "/ajax/captcha/v/1447825328.4607", payload, headers)
res = conn.getresponse()
data = res.read()
# print(data.decode("utf-8"))
filename='code/'+str(get_time_stamp13())+'.jpg'
with open(filename,'wb') as f:
    f.write(data)
ocr=ddddocr.DdddOcr()
decode_1=ocr.classification(data)
print(decode_1)