#!/bin/bash
#使用说明，修改AK、AS、一级域名、二级域名
#同级目录下将ip批量写入 ip.txt 文本
#脚本每隔一分钟替换一个ip
echo "[$(date "+%G/%m/%d %H:%M:%S")] AliDDNS.sh start..."
while read line 
do

  AliDDNS_DomainName="bjmjs.net" #一级域名
  AliDDNS_SubDomainName="pangpang"  #二级域名
  AliDDNS_TTL="1"
  AliDDNS_AK="LTAI5tGLBDPVMC7AjZpgWzXB" #AccessKey ID 
  AliDDNS_SK="ZwawP1ZNc9IHqe4wg0vYX5HlGniNjZ" #AccessKey Secret
  AliDDNS_LocalIP="$line"  #切换的ip
  AliDDNS_DomainServerIP="223.5.5.5" #这个默认


timestamp=`date -u "+%Y-%m-%dT%H%%3A%M%%3A%SZ"`
# URL加密函数
urlencode() {
    # urlencode <string>
    out=""
    while read -n1 c
    do
        case $c in
            [a-zA-Z0-9._-]) out="$out$c" ;;
            *) out="$out`printf '%%%02X' "'$c"`" ;;
        esac
    done
    echo -n $out
}
# URL加密命令
enc() {
    echo -n "$1" | urlencode
}
# 发送请求函数
send_request() {
    local args="AccessKeyId=$AliDDNS_AK&Action=$1&Format=json&$2&Version=2015-01-09"
    local hash=$(echo -n "GET&%2F&$(enc "$args")" | openssl dgst -sha1 -hmac "$AliDDNS_SK&" -binary | openssl base64)
    curl -s "http://alidns.aliyuncs.com/?$args&Signature=$(enc "$hash")"
}
# 获取记录值 (RecordID)
get_recordid() {
    grep -Eo '"RecordId":"[0-9]+"' | cut -d':' -f2 | tr -d '"'
}
# 请求记录值 (RecordID)
query_recordid() {
    send_request "DescribeSubDomainRecords" "SignatureMethod=HMAC-SHA1&SignatureNonce=$timestamp&SignatureVersion=1.0&SubDomain=$AliDDNS_SubDomainName.$AliDDNS_DomainName&Timestamp=$timestamp"
}
# 更新记录值 (RecordID)
update_record() {
    send_request "UpdateDomainRecord" "RR=$AliDDNS_SubDomainName&RecordId=$1&SignatureMethod=HMAC-SHA1&SignatureNonce=$timestamp&SignatureVersion=1.0&TTL=$AliDDNS_TTL&Timestamp=$timestamp&Type=A&Value=$AliDDNS_LocalIP"
}
# 添加记录值 (RecordID)
add_record() {
    send_request "AddDomainRecord&DomainName=$AliDDNS_DomainName" "RR=$AliDDNS_SubDomainName&SignatureMethod=HMAC-SHA1&SignatureNonce=$timestamp&SignatureVersion=1.0&TTL=$AliDDNS_TTL&Timestamp=$timestamp&Type=A&Value=$AliDDNS_LocalIP"
}
# 判断RecordIP是否为空
if [ "$AliDDNS_RecordID" = "" ]
then
    AliDDNS_RecordID=`query_recordid | get_recordid`
fi
if [ "$AliDDNS_RecordID" = "" ]
then
    AliDDNS_RecordID=`add_record | get_recordid`
    echo "[$(date "+%G/%m/%d %H:%M:%S")] Added RecordID : $AliDDNS_RecordID"
else
    update_record $AliDDNS_RecordID
    echo "[$(date "+%G/%m/%d %H:%M:%S")] Updated RecordID : $AliDDNS_RecordID"
fi

# 输出最终结果
if [ "$AliDDNS_RecordID" = "" ]; then
    # 输出失败结果 (因为没有获取到RecordID)
    echo "[$(date "+%G/%m/%d %H:%M:%S")] DDNS Update Failed !"
else
    # 输出成功结果
    echo "[$(date "+%G/%m/%d %H:%M:%S")] DDNS Update Success, New IP is : $AliDDNS_LocalIP"
fi

sleep 30s
done < ./opt/ziyuan/Shell/ip.txt