用阿里云 DNS SDK 实现动态域名解析

最近学 Java ，就将 Git 服，和测试服，直接放在家里的树莓派3和旧笔记本上，

为了在外网顺利访问，需要将域名动态的解析到家里的 IP 上，

网上了解了一番，觉得阿里云那套通过 sdk 来更新域名解析比较方面，正好手里也有阿里上购买的域名，

主要做的，就是拿到 ip ，

ipHtml = this.httpGet(requestUrl);

然后调用 api 更新域名

UpdateDomainRecordRequest updateRequest = new UpdateDomainRecordRequest(); // 设定类型 updateRequest.setType("A"); // 设置新的 IP updateRequest.setValue(newIp); // 域名 updateRequest.setRR(recordRRList.get(recordId)); // recordId updateRequest.setRecordId(recordId); // update UpdateDomainRecordResponse updateResponse = client.getAcsResponse(updateRequest);

代码呢，我就直接贴上了，后面有我放在 Git 上的地址，有打好的包，和配置文件用例

import com.aliyuncs.DefaultAcsClient; import com.aliyuncs.IAcsClient; import com.aliyuncs.alidns.model.v20150109.*; import com.aliyuncs.exceptions.ClientException; import com.aliyuncs.profile.DefaultProfile; import com.aliyuncs.profile.IClientProfile; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.URL; import java.util.*; import java.util.regex.Matcher; import java.util.regex.Pattern; public class DnsRefresh { private String propertyFile = ""; DnsRefresh(String propertyFile) { this.propertyFile = propertyFile; } public void start() { System.out.print(" >>> " + propertyFile + "\n"); Properties properties = this.getProperties(); if (properties == null) { return; } // 要动态解析的子域名列表 String[] domainArray = properties.getProperty("refreshDomain").split(","); // 旧的 IP String oldIp = properties.getProperty("oldIp"); // IP 查询服务器 String requestUrl = properties.getProperty("ipQueryServer"); // 一级域名 String rootDomain = properties.getProperty("rootDomain"); // aliyun 配置 String regionId = properties.getProperty("regionId"); String accessKeyId = properties.getProperty("accessKeyId"); String accessKeySecret = properties.getProperty("accessKeySecret"); IClientProfile profile = DefaultProfile.getProfile(regionId, accessKeyId, accessKeySecret); // 若报Can not find endpoint to access异常，请添加以下此行代码 // DefaultProfile.addEndpoint("cn-hangzhou", "cn-hangzhou", "Alidns", "alidns.aliyuncs.com"); IAcsClient client = new DefaultAcsClient(profile); // recordId 对应域名的列表 Map<String, String> recordRRList = new HashMap<>(); // 获取子域名 DescribeDomainRecordsRequest request = new DescribeDomainRecordsRequest(); request.setDomainName(rootDomain); try { DescribeDomainRecordsResponse response = client.getAcsResponse(request); List<DescribeDomainRecordsResponse.Record> recordList = response.getDomainRecords(); for (DescribeDomainRecordsResponse.Record record : recordList) { // 只解析配置里的子域名 if (Arrays.asList(domainArray).contains(record.getRR())) { // 取得要解析的 record id recordRRList.put(record.getRecordId(), record.getRR()); } } } catch (ClientException e) { System.out.print(" >>> Error : "+ e.getMessage() + "\n"); } // 预新的 IP 先和旧 IP 一样 String newIp = oldIp; String ipHtml; Pattern pattern = Pattern.compile("(\\d+\\.\\d+\\.\\d+\\.\\d+)"); Matcher m; UpdateDomainRecordRequest updateRequest = new UpdateDomainRecordRequest(); // 每 30 秒循环一次 while (true) { // 摘取页面 ipHtml = this.httpGet(requestUrl); // 抓取成功 if (ipHtml != null) { // IP 正则取出 m = pattern.matcher(ipHtml); newIp = m.find() ? m.group(1) : newIp; // 如果 IP 发生了变化 if (newIp != null && !newIp.equals(oldIp)) { // 初始化更新域名解析的类 updateRequest.setType("A"); // 设置新的 IP updateRequest.setValue(newIp); // 将每个要解析的域名都处理一次 for (String recordId : recordRRList.keySet()) { // 域名 updateRequest.setRR(recordRRList.get(recordId)); // recordId updateRequest.setRecordId(recordId); // print log System.out.println("Try Update Domain : " + recordRRList.get(recordId) + "." + rootDomain + "\n"); try { UpdateDomainRecordResponse updateResponse = client.getAcsResponse(updateRequest); System.out.println("UpdateDomainRecordResponse : " + updateResponse + "\n"); } catch (ClientException e) { System.out.println("client.getAcsResponse Error : " + e.getMessage() + "\n"); } } // 旧 IP 重新赋值 oldIp = newIp; } // 线程等待 10 秒 synchronized (this) { try { this.wait(30 * 1000); } catch (Exception e) { System.out.println("System wait error : " + e.getMessage() + "\n"); } } } } } private String httpGet(String url) { HttpURLConnection http = null; InputStream is = null; try { URL urlGet = new URL(url); http = (HttpURLConnection) urlGet.openConnection(); http.setRequestMethod("GET"); http.setRequestProperty("Content-Type", "text/html; charset=UTF-8"); http.setDoOutput(true); http.setDoInput(true); http.connect(); is = http.getInputStream(); int size = is.available(); byte[] jsonBytes = new byte[size]; is.read(jsonBytes); return new String(jsonBytes, "UTF-8"); } catch (Exception e) { return null; } } private Properties getProperties() { try { InputStream is = new FileInputStream(propertyFile); Properties pros = new Properties(); pros.load(is); return pros; } catch (IOException e) { System.out.println(propertyFile + " is can not read \n"); } return null; } }

我是一个 Java 新手，多多指教

原文链接：https://blog.csdn.net/koocyton/article/details/79331305