前景提要

小米路由R4A千兆版安装breed+OpenWRT教程以及救砖（全脚本无需硬改）
【教程】保姆级红米AX6000刷UBoot和OpenWrt固件
详解OpenWrt路由器设置Crontab定时检查网络并重启

现在需要自动定时的去登录校园网，省的每次还得自己手动去登录，也太麻烦了。

Python脚本

适合在电脑上挂着

import requests
import socket
import urllib.parse
import time
import psutil
import subprocess
import json5

headers = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/113.0.0.0 Safari/537.36 Edg/113.0.1774.57'
}

def check():
    url = 'http://www.baidu.com'
    try:
        requests.get(url, timeout=2)
        return True
    except:
        return False

def get_ip():
    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    s.connect(('10.255.255.255', 1))
    ip = s.getsockname()[0]
    print(ip)
    return ip

def get_ip2():
    url = r'http://192.168.53.229/drcom/chkstatus?callback='
    resp = requests.get(url=url, headers=headers).text.strip()[1:-1]
    return json5.loads(resp)['v46ip']

def list_interfaces():
    # 获取当前计算机上所有的网卡信息
    interfaces = psutil.net_if_addrs()
    # 遍历网卡信息，输出网卡名称
    for interface in interfaces:
        print(interface)

def set_dns(interface_name="WLAN", dns_server='223.5.5.5'):
    '''interface_name是网卡的名称，如"Ethernet/WLAN"；dns_servers是DNS服务器地址，多个地址可以用逗号隔开。'''
    # 调用netsh命令修改DNS服务器
    output = subprocess.run(["netsh", "interface", "ipv4", "set", "dnsservers", interface_name, "static", dns_server], check=True, capture_output=True)
    output_str = output.stdout.decode('gbk')
    print(output_str)
    # 输出修改后的DNS服务器地址
    output = subprocess.run(["netsh", "interface", "ipv4", "show", "dnsservers", interface_name], capture_output=True)
    output_str = output.stdout.decode('gbk')
    print(output_str)

def connect():
    urls = list(['https://192.168.53.229:801/eportal/?', 'https://s2.scut.edu.cn:801/eportal/?'])
    
    data = {'c':'Portal',
            'a':'login',
            'callback':'dr1003',
            'login_method':'1',
            'user_account':',0,你的网络账号(也就是学号)主要前面的[0,]不要删',
            'user_password':'你的网络密码',
            'wlan_user_ip': get_ip2(),
            'wlan_user_ipv6':'',
            'wlan_user_mac':'000000000000',
            'wlan_ac_ip':'',
            'wlan_ac_name':'',
            'jsVersion':'3.3.2',
            'v':'10315'
    }
    for url in urls:
        try:
            res = requests.get(url + urllib.parse.urlencode(data), headers=headers, verify=False).text
            print(res)
            break
        except:
            pass


if __name__ == '__main__':
    # set_dns(dns_server='202.38.193.33')
    # set_dns(dns_server='223.5.5.5')
    connect()
    # while True:
    #     connect()
    #     # connect() if check() else None
    #     time.sleep(60*30)

Shell脚本(推荐)

适合在路由器上挂着，由上面的python脚本转换而来

#!/bin/bash

check() {
    url="http://www.baidu.com"
    if curl --output /dev/null --silent --head --fail "$url" -m 2; then
        return 0
    else
        return 1
    fi
}

get_ip() {
    ip=$(ip route get 8.8.8.8 | awk '{print $NF; exit}')
    echo "$ip"
}

get_ip2() {
    url="http://192.168.53.229/drcom/chkstatus?callback="
    resp=$(curl -s -H "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/113.0.0.0 Safari/537.36 Edg/113.0.1774.57" "$url")
    #echo $resp
    #echo "$resp" | grep -Eo '"v4ip":"\K[^"]+'
    ip=$(echo "$resp" | awk -F'"' '/"v4ip":/{for(i=1;i<=NF;i++){if($i=="v4ip"){print $(i+2); exit}}}')
    echo $ip
}

list_interfaces() {
    interfaces=$(ip link show | awk -F': ' '{print $2}')
    echo "$interfaces"
}

set_dns() {
    interface_name="$1"
    dns_server="$2"
    # 调用nmcli命令修改DNS服务器
    nmcli con mod "$interface_name" ipv4.dns "$dns_server"
    # 输出修改后的DNS服务器地址
    nmcli con show "$interface_name" | grep ipv4.dns
}

connect() {
    ip=$(get_ip2)
    echo ">> 当前分配的IP：$ip"
    data="c=Portal&a=login&callback=dr1003&login_method=1&user_account=%2C0%2C你的网络账号(也就是学号)主要前面的[%2C0%2C]不要删&user_password=你的网络密码&wlan_user_ip=$ip&wlan_user_ipv6=&wlan_user_mac=000000000000&wlan_ac_ip=&wlan_ac_name=&jsVersion=3.3.2&v=10315"
    urls="https://192.168.53.229:801/eportal/? https://s2.scut.edu.cn:801/eportal/?"

    for url in $urls; do
        echo ">> 当前尝试链接：$url"
        response=$(curl -s -k -X GET "${url}${data}")
        if [ $? -eq 0 ]; then
            echo ">> 请求成功：$response"
            break
        fi
    done
}


# set_dns "WLAN" "202.38.193.33"
# set_dns "WLAN" "223.5.5.5"
connect
# while true; do
#     connect
#     # connect if check else None
#     sleep 1800
# done