实现动态域名解析DDNS
https://help.aliyun.com/document_detail/431629.html?spm=5176.smartservice_service_robot_chat_new.0.0.26bef625nZZyid
实现动态域名解析DDNS
更新时间:2022-09-27 22:14
本教程详细介绍如何使用Alibaba Cloud SDK for Java实现动态域名解析(DDNS)。
前提条件
在使用本教程前,请确保已完成以下操作:
- 使用Alibaba Cloud SDK for Java,您需要一个阿里云账号和访问密钥(AccessKey)。 请在阿里云控制台中的AccessKey管理页面上创建和查看您的AccessKey。
- 确保您已经安装了Alibaba Cloud SDK for Java,准确的SDK版本号,请参见阿里云开发工具包(SDK)。
<dependencies> <!-- https://mvnrepository.com/artifact/com.aliyun/aliyun-java-sdk-core --> <dependency> <groupId>com.aliyun</groupId> <artifactId>aliyun-java-sdk-core</artifactId> <version>4.4.3</version> </dependency> <!-- https://mvnrepository.com/artifact/com.aliyun/aliyun-java-sdk-alidns --> <dependency> <groupId>com.aliyun</groupId> <artifactId>aliyun-java-sdk-alidns</artifactId> <version>2.0.10</version> </dependency> </dependencies>
代码示例
本文操作示例主要以代码形式体现,具体代码如下:
import com.aliyuncs.DefaultAcsClient;
import com.aliyuncs.IAcsClient;
import com.aliyuncs.alidns.model.v20150109.DescribeDomainRecordsRequest;
import com.aliyuncs.alidns.model.v20150109.DescribeDomainRecordsResponse;
import com.aliyuncs.alidns.model.v20150109.UpdateDomainRecordRequest;
import com.aliyuncs.alidns.model.v20150109.UpdateDomainRecordResponse;
import com.aliyuncs.exceptions.ClientException;
import com.aliyuncs.profile.DefaultProfile;
import com.google.gson.Gson;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* 动态域名解析
*/
public class DDNS {
/**
* 获取主域名的所有解析记录列表
*/
private DescribeDomainRecordsResponse describeDomainRecords(DescribeDomainRecordsRequest request, IAcsClient client){
try {
// 调用SDK发送请求
return client.getAcsResponse(request);
} catch (ClientException e) {
e.printStackTrace();
// 发生调用错误,抛出运行时异常
throw new RuntimeException();
}
}
/**
* 获取当前主机公网IP
*/
private String getCurrentHostIP(){
// 这里使用jsonip.com第三方接口获取本地IP
String jsonip = "https://jsonip.com/";
// 接口返回结果
String result = "";
BufferedReader in = null;
try {
// 使用HttpURLConnection网络请求第三方接口
URL url = new URL(jsonip);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.connect();
in = new BufferedReader(new InputStreamReader(
urlConnection.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
e.printStackTrace();
}
// 使用finally块来关闭输入流
finally {
try {
if (in != null) {
in.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
}
// 正则表达式,提取xxx.xxx.xxx.xxx,将IP地址从接口返回结果中提取出来
String rexp = "(\\d{1,3}\\.){3}\\d{1,3}";
Pattern pat = Pattern.compile(rexp);
Matcher mat = pat.matcher(result);
String res="";
while (mat.find()) {
res=mat.group();
break;
}
return res;
}
/**
* 修改解析记录
*/
private UpdateDomainRecordResponse updateDomainRecord(UpdateDomainRecordRequest request, IAcsClient client){
try {
// 调用SDK发送请求
return client.getAcsResponse(request);
} catch (ClientException e) {
e.printStackTrace();
// 发生调用错误,抛出运行时异常
throw new RuntimeException();
}
}
private static void log_print(String functionName, Object result) {
Gson gson = new Gson();
System.out.println("-------------------------------" + functionName + "-------------------------------");
System.out.println(gson.toJson(result));
}
public static void main(String[] args) {
// 设置鉴权参数,初始化客户端
DefaultProfile profile = DefaultProfile.getProfile(
"cn-qingdao",// 地域ID
"your-access-key-id",// 您的AccessKey ID
"your-access-key-secret");// 您的AccessKey Secret
IAcsClient client = new DefaultAcsClient(profile);
DDNS ddns = new DDNS();
// 查询指定二级域名的最新解析记录
DescribeDomainRecordsRequest describeDomainRecordsRequest = new DescribeDomainRecordsRequest();
// 主域名
describeDomainRecordsRequest.setDomainName("example.com");
// 主机记录
describeDomainRecordsRequest.setRRKeyWord("ddnstest");
// 解析记录类型
describeDomainRecordsRequest.setType("A");
DescribeDomainRecordsResponse describeDomainRecordsResponse = ddns.describeDomainRecords(describeDomainRecordsRequest, client);
log_print("describeDomainRecords",describeDomainRecordsResponse);
List<DescribeDomainRecordsResponse.Record> domainRecords = describeDomainRecordsResponse.getDomainRecords();
// 最新的一条解析记录
if(domainRecords.size() != 0 ){
DescribeDomainRecordsResponse.Record record = domainRecords.get(0);
// 记录ID
String recordId = record.getRecordId();
// 记录值
String recordsValue = record.getValue();
// 当前主机公网IP
String currentHostIP = ddns.getCurrentHostIP();
System.out.println("-------------------------------当前主机公网IP为:"+currentHostIP+"-------------------------------");
if(!currentHostIP.equals(recordsValue)){
// 修改解析记录
UpdateDomainRecordRequest updateDomainRecordRequest = new UpdateDomainRecordRequest();
// 主机记录
updateDomainRecordRequest.setRR("ddnstest");
// 记录ID
updateDomainRecordRequest.setRecordId(recordId);
// 将主机记录值改为当前主机IP
updateDomainRecordRequest.setValue(currentHostIP);
// 解析记录类型
updateDomainRecordRequest.setType("A");
UpdateDomainRecordResponse updateDomainRecordResponse = ddns.updateDomainRecord(updateDomainRecordRequest, client);
log_print("updateDomainRecord",updateDomainRecordResponse);
}
}
}
}
运行结果
正确运行结果类似如下:
-------------------------------describeDomainRecords-------------------------------
{
"requestId": "6AE588B9-FAFA-45FE-8FBE-CACB196D3539",
"totalCount": 1,
"pageNumber": 1,
"pageSize": 20,
"domainRecords": [
{
"domainName": "example.com",
"recordId": "1846657850481****",
"rR": "ddnstest",
"type": "A",
"value": "1.1.XX.XX",
"tTL": 600,
"line": "default",
"status": "ENABLE",
"locked": false,
"weight": 1
}
]
}
-------------------------------当前主机公网IP为:123.123.XX.XX-------------------------------
-------------------------------updateDomainRecord-------------------------------
{
"requestId": "08DC052F-7DF7-4451-8214-8489EC15D96A",
"recordId": "1846657850481****"
}
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