首先去阿里云官网买一个最便宜的服务器（轻量级服务器即可），然后镜像选择为ubuntu 18.04之后需要在该服务器上安装python 3.7，这个网上的教程很多，自己搜索 阿里云ubuntu 18.4 python 3.7就好了，然后需要在服务器安装Chrome浏览器和ChromeDriver驱动参考网址如下：在Ubuntu上安装Chrome浏览器和ChromeDriver_Biglen的博客-CSDN博客
环境配置好之后 上代码，需要自己输入账号，密码和打卡地点（地点在注释里面），程序用了selenium类，因为比较方便。

from unittest import mock


def get_chrome_driver():
    from selenium import webdriver
    options = webdriver.ChromeOptions()
    options.add_argument("headless")
    options.add_argument('--no-sandbox')
    options.add_argument('--disable-gpu')
    options.add_argument('--disable-dev-shm-usage')
    return webdriver.Chrome(options=options)


from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui  import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

from bs4 import BeautifulSoup
import json


username = ''       # 用户名
password = ''       # 密码
curr_location = ''  # 打卡地点

def fillOneForm(wid):
    info = '&IS_TWZC=1&IS_HAS_JKQK=1&JRSKMYS=1&JZRJRSKMYS=1'
    link = 'http://ehallapp.nju.edu.cn/xgfw/sys/yqfxmrjkdkappnju/apply/saveApplyInfos.do?WID={wid}&CURR_LOCATION={curr_location}'
    link = link.format(wid=wid, curr_location=curr_location) + info
    driver.get(link)

    html = driver.page_source
    soup = BeautifulSoup(html, 'html.parser')
    ss = soup.select('pre')[0]
    res = json.loads(ss.text)
    if res['code'] == '0':
        if res['msg'] == '成功':
            return 'Success!'
    return 'Failed.'
    

def fillTheForms(res):


    form = res[0]
    if form['TBZT'] == '0':
        print('Date: ' + form['TBRQ'] + '  ' + fillOneForm(form['WID']))


if __name__ == "__main__":
    options = webdriver.ChromeOptions()

    options.add_argument('--headless')
    options.add_argument('--no-sandbox')
    options.add_argument('--disable-gpu')
    options.add_argument('--disable-dev-shm-usage')
    options.add_argument('blink-settings=imagesEnabled=false')
    options.add_experimental_option('excludeSwitches', ['enable-automation'])
    options.add_argument('log-level=3')
    driver = webdriver.Chrome(options=options)
    
    driver.get('https://authserver.nju.edu.cn/authserver/login')
    while True:
        try:
            element = WebDriverWait(browser, 0.5).until(EC.presence_of_element_located((By.ID,"username")))
        finally:
            break

    driver.find_element_by_id("username").send_keys(username)
    driver.find_element_by_id("password").send_keys(password)
    driver.find_element_by_class_name("auth_login_btn").click()

    driver.get('http://ehallapp.nju.edu.cn/xgfw/sys/yqfxmrjkdkappnju/apply/getApplyInfoList.do')

    html = driver.page_source
    soup = BeautifulSoup(html, 'html.parser')
    ss = soup.select('pre')[0]
    res = json.loads(ss.text)

    if res['code'] == '0':
        if res['msg'] == '成功':
            fillTheForms(res['data'])

    print('Completed')
    driver.quit()

这个.py文件如何上传到服务器呢？不要直接在服务器复制粘贴，程序会报错！！！使用Xshell和xftp这两个软件上传，网上都有教程windows如何向阿里云服务器传递文件-阿里云开发者社区 (aliyun.com)上传之后如何定时打卡呢？使用crontab -e这个代码  教程如下（在最后面）Centos7从零开始配置py每日自动打卡脚本_Talk is cheap. So look at my blog.-CSDN博客配置完毕后，即可开始打卡