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);
细节的处理比较啰嗦，主要是配置文件，缓存上次的 ip，多个子域名的处理，获取子域名的 record id
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;
}
}
项目的 Github 地址 https://github.com/koocyton/AliDnsRefresh ，打好的包也在里面
我是一个 Java 新手，多多指教
如何获取AccessKeyId和AccessKeySecret ? 参考 https://helpcdn.aliyun.com/knowledge_detail/48699.html
我的内容比较粗糙，http://blog.csdn.net/jiyuxian/article/details/53762646 说的比较详细
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版权声明：本文为CSDN博主「koocyton」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/koocyton/article/details/79331305
