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在bash中使用DNSPod的API接口实现DDNS客户端
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| #!/bin/bash | |
| ############################## | |
| # dnspodsh v0.3 | |
| # 基于dnspod api构架的bash ddns客户端 | |
| # 作者：zrong(zengrong.net) | |
| # 详细介绍：http://zengrong.net/post/1524.htm | |
| # 创建日期：2012-02-13 | |
| # 更新日期：2012-03-11 | |
| ############################## | |
| token_id=${1:?'必须提供登录名'} | |
| token_val=${2:?'必须提供密码'} | |
| format="json" | |
| lang="en" | |
| userAgent="dnspodsh/0.3([email protected])" | |
| commonPost="login_token=$token_id,$token_val&format=$format&lang=$lang" | |
| apiUrl='https://dnsapi.cn/' | |
| ipUrl='http://members.3322.org/dyndns/getip' | |
| # 要处理的域名数组，每个元素代表一个域名的一组记录 | |
| # 在数组的一个元素中，以空格分隔域名和子域名 | |
| # 第一个空格前为主域名，后面用空格分离多个子域名 | |
| # 如果使用泛域名，必须用\*转义 | |
| domainList[0]='jsw3286 @ engine' | |
| #domainList[1]='domain2.com subdomain subdomain2' | |
| # 多长时间比较一次ip地址 | |
| delay=300 | |
| # logfile | |
| logDir='/var/log' | |
| logFile=$logDir'/dnspodsh.log' | |
| traceFile=$logDir'/dnspodshtrace.log' | |
| # 检测ip地址是否符合要求 | |
| checkip() | |
| { | |
| # ipv4地址 | |
| if [[ "$1" =~ ^([0-9]{1,3}\.){3}[0-9]{1,3}$ ]];then | |
| return 0 | |
| # ipv6地址 | |
| elif [[ "$1" =~ ^([\da-fA-F]{1,4}:){7}[\da-fA-F]{1,4}$|^:((:[\da-fA-F]{1,4}){1,6}|:)$|^[\da-fA-F]{1,4}:((:[\da-fA-F]{1,4}){1,5}|:)$|^([\da-fA-F]{1,4}:){2}((:[\da-fA-F]{1,4}){1,4}|:)$|^([\da-fA-F]{1,4}:){3}((:[\da-fA-F]{1,4}){1,3}|:)$|^([\da-fA-F]{1,4}:){4}((:[\da-fA-F]{1,4}){1,2}|:)$|^([\da-fA-F]{1,4}:){5}:([\da-fA-F]{1,4})?$|^([\da-fA-F]{1,4}:){6}:$ ]];then | |
| return 0 | |
| fi | |
| return 1 | |
| } | |
| getUrl() | |
| { | |
| #curl -s -A $userAgent -d $commonPost$2 --trace $traceFile $apiUrl$1 | |
| curl -s -A $userAgent -d $commonPost$2 $apiUrl$1 | |
| } | |
| getVersion() | |
| { | |
| getUrl "Info.Version" | |
| } | |
| getUserDetail() | |
| { | |
| getUrl "User.Detail" | |
| } | |
| writeLog() | |
| { | |
| if [ -w $logDir ];then | |
| local pre=`date` | |
| for arg in $@;do | |
| pre=$pre'\t'$arg | |
| done | |
| echo -e $pre>>$logFile | |
| fi | |
| echo -e $1 | |
| } | |
| getDomainList() | |
| { | |
| getUrl "Domain.List" "&type=all&offset=0&length=10" | |
| } | |
| # 根据域名id获取记录列表 | |
| # $1 域名id | |
| getRecordList() | |
| { | |
| getUrl "Record.List" "&domain_id=$1&offset=0&length=20" | |
| } | |
| # 设置记录 | |
| setRecord() | |
| { | |
| writeLog "set domain $3.$8 to new ip:$7" | |
| local subDomain=$3 | |
| # 由于*会被扩展，在最后一步将转义的\*替换成* | |
| if [ "$subDomain" = '\*' ];then | |
| subDomain='*' | |
| fi | |
| local request="&domain_id=$1&record_id=$2&sub_domain=$subDomain&record_type=$4&record_line=$5&ttl=$6&value=$7" | |
| #echo $request | |
| local saveResult=$(getUrl 'Record.Modify' "$request") | |
| # 检测返回是否正常，但即使不正常也不退出程序 | |
| if checkStatusCode "$saveResult" 0;then | |
| writeLog "set record $3.$8 success." | |
| fi | |
| #getUrl 'Record.Modify' "&domain_id=$domainid&record_id=$recordid&sub_domain=$recordName&record_type=$recordtype&record_line=$recordline&ttl=$recordttl&value=$newip" | |
| } | |
| # 设置一批记录 | |
| setRecords() | |
| { | |
| numRecord=${#changedRecords[@]} | |
| for (( i=0; i < $numRecord; i++ ));do | |
| setRecord ${changedRecords[$i]} | |
| done | |
| # 删除待处理的变量 | |
| unset changeRecords | |
| } | |
| # 通过key得到找到一个JSON对象字符串中的值 | |
| getDataByKey() | |
| { | |
| local s='s/{[^}]*"'$2'":["]*\('$(getRegexp $2)'\)["]*[^}]*}/\1/' | |
| #echo '拼合成的regexp:'$s | |
| echo $1|sed $s | |
| } | |
| # 根据key返回要获取的正则表达式 | |
| getRegexp() | |
| { | |
| case $1 in | |
| 'value') echo '[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}';; | |
| 'type') echo '[A-Z]\+';; | |
| 'name') echo '[-_.A-Za-z*]\+';; | |
| 'ttl'|'id') echo '[0-9]\+';; | |
| 'line') echo '[^"]\+';; | |
| esac | |
| } | |
| # 通过一个JSON key名称，获取一个{}包围的JSON对象字符串 | |
| # $1 要搜索的key名称 | |
| # $2 要搜索的对应值 | |
| getJSONObjByKey() | |
| { | |
| grep -o '{[^}{]*"'$1'":"'$2'"[^}]*}' | |
| } | |
| # 获取A记录类型的域名信息 | |
| # 对于其它记录，同样的名称可以对应多条记录，因此使用getJSONObjByKey可能获取不到需要的数据 | |
| getJSONObjByARecord() | |
| { | |
| grep -o '{[^}{]*"name":"'$1'"[^}]*"type":"A"[^}]*}' | |
| } | |
| # 获取返回代码是否正确 | |
| # $1 要检测的字符串，该字符串包含{status:{code:1}}形式，代表DNSPodAPI返回正确 | |
| # $2 是否要停止程序，因为dnspod在代码错误过多的情况下会封禁账号 | |
| checkStatusCode() | |
| { | |
| if [[ "$1" =~ \{\"status\":\{[^}{]*\"code\":\"1\"[^}]*\} ]];then | |
| return 0 | |
| fi | |
| writeLog "DNSPOD return error:$1" | |
| # 根据参数需求退出程序 | |
| if [ -n "$2" ] && [ "$2" -eq 1 ];then | |
| writeLog 'exit dnspodsh' | |
| exit 1 | |
| fi | |
| } | |
| # 获取与当前ip不同的，要更新的记录的数组 | |
| getChangedRecords() | |
| { | |
| # 从DNSPod获取最新的域名列表 | |
| local domainListInfo=$(getDomainList) | |
| if [ -z "$domainListInfo" ];then | |
| writeLog 'DNSPOD tell me domain list is null,waiting...' | |
| return 1 | |
| fi | |
| checkStatusCode "$domainListInfo" 1 | |
| # 主域名的id | |
| local domainid | |
| local domainName | |
| # 主域名的JSON信息 | |
| local domainInfo | |
| # 主域名的所有记录列表 | |
| local recordList | |
| # 一条记录的JSON信息 | |
| local recordInfo | |
| # 记录的id | |
| local recordid | |
| local recordName | |
| # 记录的TTL | |
| local recordTtl | |
| # 记录的类型 | |
| local recordType | |
| # 记录的线路 | |
| local recordLine | |
| local j | |
| # 用于记录被改变的记录 | |
| unset changedRecords | |
| local numDomain=${#domainList[@]} | |
| local domainGroup | |
| for ((i=0;i<$numDomain;i++));do | |
| domainGroup=${domainList[$i]} | |
| j=0 | |
| for domain in ${domainGroup[@]};do | |
| # 列表的第一个项目，是主域名 | |
| if ((j==0));then | |
| domainName=$domain | |
| domainInfo=$(echo $domainListInfo|getJSONObjByKey 'name' $domainName) | |
| domainid=$(getDataByKey "$domainInfo" 'id') | |
| recordList=$(getRecordList $domainid) | |
| if [ -z "$recordList" ];then | |
| writeLog 'DNSPOD tell me record list null,waiting...' | |
| return 1 | |
| fi | |
| checkStatusCode "$recordList" 1 | |
| else | |
| # 从dnspod获取要设置的子域名记录的信息 | |
| recordInfo=$(echo $recordList|getJSONObjByARecord $domain) | |
| # 如果取不到记录，则不处理 | |
| if [ -z "$recordInfo" ];then | |
| continue | |
| fi | |
| # 从dnspod获取要设置的子域名的ip | |
| oldip=$(getDataByKey "$recordInfo" 'value') | |
| # 检测获取到的旧ip地址是否符合ip规则 | |
| if ! checkip "$oldip";then | |
| writeLog 'get old ip error!it is "$oldid".waiting...' | |
| continue | |
| fi | |
| if [ "$newip" != "$oldip" ];then | |
| recordid=$(getDataByKey "$recordInfo" 'id') | |
| recordName=$(getDataByKey "$recordInfo" 'name') | |
| recordTtl=$(getDataByKey "$recordInfo" 'ttl') | |
| recordType=$(getDataByKey "$recordInfo" 'type') | |
| # 由于从服务器获取的线路是utf编码，目前无法知道如何转换成中文，因此在这里写死。dnspod中免费用户的默认线路的名称就是“默认” | |
| #recordLine=$(getDataByKey "$recordInfo" 'line') | |
| recordLine='默认' | |
| # 判断取值是否正常，如果值为空就不处理 | |
| if [ -n "$recordid" ] && [ -n "$recordTtl" ] && [ -n "$recordType" ]; then | |
| # 使用数组记录需要修改的子域名的所有值 | |
| # 这里一共有8个参数，与setRecord中的参数对应 | |
| changedRecords[${#changedRecords[@]}]="$domainid $recordid $domain $recordType $recordLine $recordTtl $newip $domainName" | |
| fi | |
| fi | |
| fi | |
| j=$((j+1)) | |
| done | |
| done | |
| } | |
| # 执行检测工作 | |
| go() | |
| { | |
| # 由于获取到的数据多了一些多余的字符，所以提取ip地址的部分 | |
| # 从api中获取当前的外网ip | |
| newip=$(curl -s $ipUrl|grep -o $(getRegexp 'value')) | |
| # 如果获取最新ip错误，就继续等待下一次取值 | |
| if ! checkip "$newip";then | |
| writeLog 'can not get new ip,waiting...' | |
| sleep $delay | |
| continue | |
| fi | |
| # 获取需要修改的记录 | |
| getChangedRecords | |
| if (( ${#changedRecords[@]} > 0 ));then | |
| writeLog "ip is changed,new ip is:$newip" | |
| setRecords | |
| fi | |
| } | |
| while [ 1 ];do | |
| go | |
| sleep $delay | |
| done |
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