纯 Shell 实现，无登录功能，需要手动设置 Cookies。

原则上，同样适用其他论坛，自行改动部分代码即可。

登录后，取 Cookies 写到 txt内，然后修改脚本中的配置即可。

#!/bin/bash
#
# v2ex 自动签到
# 博客: https://www.qs5.org
# 作者: ImDong(青石)
# 
# 2020年05月03日21:00:46
# 
# 使用方法: 将网站登录后的 Cookies 保存到 txt 内，然后修改下面的配置即可
# 
# crontab: 
# * * * * * /bin/bash /home/pi/Projects/load_v2ex.sh >> /home/pi/Projects/load_v2ex.log

# 请求域名
V2_DOMAIN="https://www.v2ex.com"

# Cookies 保存文件
COOKIE_FILE="/home/pi/Projects/v2_cookie.txt"

# 登录用户名
V2EX_USERNAME="imdong"

# 默认查询频率
sleep_time=5
loop_num=3

# 发送请求
send(){
    # result=`cat tmp.html`
    result=$(/usr/bin/curl -s -L --cookie "${COOKIE_DATA}" "${V2_DOMAIN}${1}")
    # echo ${result} > /home/pi/Projects/tmp.html

    # 判断是否已经登录
    title=`echo ${result} | /bin/grep -o '<title>\([^<]\+\)</title>'`
    title=${title:7:${#title}-15}

    if [ "${title:0-2}" == "登录" ]; then
        echo "未登录..."
        exit 127
    fi

    # 是否已签到
    tmp_str=`echo ${result} | /bin/grep -o "/mission/daily/redeem?once=[^']\+"`
    if [ "${#tmp_str}" -gt "10" ]; then
        send ${tmp_str}
        echo "签到成功"
    fi
}

echo -e "ST: $(date)\t\c"

# 检查 cookie
if [ ! -f "${COOKIE_FILE}" ]; then
    echo "请创建cookie.txt文件";
    exit 0
fi
COOKIE_DATA=`cat ${COOKIE_FILE}`
# echo ${COOKIE_DATA}

# 初始检查
send "/top/dau"

# 判断位置(计算频率)
list=`echo ${result} | grep -oP "<h2[^>]+><span[^>]+>([0-9]+)\.<\/span>\s*<a[^>]+>([^<]+)<\/a><\/h2>[^&]+&nbsp;([0-9]+)&" | sed "s/<h2[^>]\+><span[^>]\+>\([0-9]\+\)\.<\/span>\s*<a[^>]\+>\([^<]\+\)<\/a><\/h2>[^&]\+&nbsp;\([0-9]\+\)&$s/\1,\2,\3/g" | tr '\n' '|'`;
no1_name=`echo ${list} | cut -d"|" -f 1 | cut -d"," -f 2`
no1_num=`echo ${list} | cut -d"|" -f 1 | cut -d"," -f 3`
no2_num=`echo ${list} | cut -d"|" -f 2 | cut -d"," -f 3`
((gap_num=${no1_num} - ${no2_num}))

# echo "${no1_num}, ${no2_num}, ${gap_num}"

if [[ ! "${no1_name}" == "${V2EX_USERNAME}" ]] || [[ "${gap_num}" -lt "2000" ]] ;then
    echo "高频模式, ${no1_name}, ${no1_num} - ${no2_num} = ${gap_num}"
    sleep_time=1
    loop_num=9
elif [[ "${no1_name}" == "${V2EX_USERNAME}" ]] && [[ "${gap_num}" -gt "3000" ]] ;then
    echo "低频模式, ${no1_name}, ${no1_num} - ${no2_num} = ${gap_num}"
    sleep_time=0
    loop_num=1
else
    echo "平时模式, ${no1_name}, ${no1_num} - ${no2_num} = ${gap_num}"
fi

# 检查页面
for ((i=1; i<=${loop_num}; i ++))
do
    # 检查页面
    printf "%02d: " ${i}
    echo -e "$(date)\t\c"
    send "/mission/daily"
    echo -e "${title}\t刷新完毕"
    /bin/sleep ${sleep_time}
done

echo -e "EN: $(date)\tExit"