【发布时间】：2021-08-10 10:14:03
【问题描述】：
我有这个有效的代码（有一个警告）。
import java.io.*;
import java.util.ArrayList;
import java.util.List;
import org.apache.hc.client5.http.classic.methods.HttpGet;
import org.apache.hc.client5.http.classic.methods.HttpPost;
import org.apache.hc.client5.http.entity.UrlEncodedFormEntity;
import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
import org.apache.hc.client5.http.impl.classic.CloseableHttpResponse;
import org.apache.hc.client5.http.impl.classic.HttpClients;
import org.apache.hc.core5.http.HttpEntity;
import org.apache.hc.core5.http.NameValuePair;
import org.apache.hc.core5.http.io.entity.EntityUtils;
import org.apache.hc.core5.http.io.entity.StringEntity;
import org.apache.hc.core5.http.message.BasicNameValuePair;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.json.JSONArray;
import org.json.JSONObject;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.util.Enumeration;
/**
*/
public class PorkbunDynDNSClient
{
static String endpoint = "";
static String apikey = "";
static String secretapikey = "";
private static String getLocalIPv6Address() throws IOException
{
InetAddress inetAddress = null;
Enumeration<NetworkInterface> networkInterfaces = NetworkInterface.getNetworkInterfaces();
outer:
while (networkInterfaces.hasMoreElements())
{
Enumeration<InetAddress> inetAds = networkInterfaces.nextElement().getInetAddresses();
while (inetAds.hasMoreElements())
{
inetAddress = inetAds.nextElement();
//Check if it‘s ipv6 address and reserved address
if (inetAddress instanceof Inet6Address && !isReservedAddr(inetAddress))
{
break outer;
}
}
}
String ipAddr = inetAddress.getHostAddress();
// Filter network card No
int index = ipAddr.indexOf("%");
if (index > 0) {
ipAddr = ipAddr.substring(0, index);
}
return ipAddr;
}
/**
* Check if it‘s "local address" or "link local address" or
* "loopbackaddress"
*
* @param ip address
*
* @return result
*/
private static boolean isReservedAddr(InetAddress inetAddr)
{
if (inetAddr.isAnyLocalAddress() || inetAddr.isLinkLocalAddress() || inetAddr.isLoopbackAddress())
{
return true;
}
return false;
}
public static void main(String[] args)
{
if (args.length < 3)
{
System.out.println("Required arguments are domain, subdomain, record type\nExample 1: yourdomain.com \"www\" A\nExample 2: yourdomain.com \"\" A");
return;
}
String domainName = args[0].toLowerCase();
String subDomain = args[1].toLowerCase();
String recordType = args[2].toUpperCase();
String hostName = domainName;
if(subDomain.length() > 0)
hostName = subDomain+"."+domainName;
// read config file
try
{
File config = new File("./config.json");
FileInputStream fis = new FileInputStream(config);
byte[] data = new byte[(int) config.length()];
fis.read(data);
fis.close();
String configStr = new String(data, "UTF-8");
JSONObject configObj = new JSONObject(configStr);
endpoint = configObj.get("endpoint").toString();
apikey = configObj.get("apikey").toString();
secretapikey = configObj.get("secretapikey").toString();
System.out.println("API endpoint: "+endpoint);
System.out.println("apikey: "+apikey);
System.out.println("secretapikey: "+secretapikey);
}
catch(Exception e)
{
e.printStackTrace();
System.exit(0);
}
String realIp = "";
// ping API to get current IP
if(recordType.equals("AAAA"))
{
try
{
realIp = getLocalIPv6Address().toLowerCase();
System.out.println("Detected current IPv6 as "+realIp+".");
}
catch(Exception e)
{
e.printStackTrace();
System.out.println("Could not get IPv6 from local computer.");
System.exit(0);
}
} else {
JSONObject pingResult = ping();
if(!pingResult.get("status").toString().equals("SUCCESS"))
{
System.out.println("Could not get ping result from API.");
System.out.println(pingResult);
System.exit(0);
}
System.out.println(pingResult);
realIp = pingResult.get("yourIp").toString().toLowerCase();
System.out.println("Detected current IPv4 as "+realIp+".");
}
// get current records
JSONObject retrieveResult = retrieve(domainName);
if(!retrieveResult.get("status").toString().equals("SUCCESS"))
{
System.out.println("Could not get records from API.");
System.out.println(retrieveResult);
System.exit(0);
}
System.out.println(retrieveResult);
JSONArray records = (JSONArray)retrieveResult.get("records");
for(int i = 0; i < records.length(); i++)
{
JSONObject record = (JSONObject)records.get(i);
String currentId = record.get("id").toString().toLowerCase();
String currentName = record.get("name").toString().toLowerCase();
String currentType = record.get("type").toString().toUpperCase();
String currentContent = record.get("content").toString().toLowerCase();
if(currentName.equals(hostName) && currentType.equals(recordType))
{
System.out.println(currentType+" record for "+currentName+" is currently "+currentContent+".");
if(!currentContent.equals(realIp))
{
System.out.println("Modifying current DNS record due to IP address mismatch.");
// edit record
JSONObject editResult = edit(domainName, currentId, subDomain, currentType, realIp, "300", "0");
if(!editResult.get("status").toString().equals("SUCCESS"))
{
System.out.println("Could not edit record via API.");
System.out.println(editResult);
System.exit(0);
}
System.out.println(editResult);
}
}
}
}
static JSONObject edit(String domain, String id, String name, String type, String content, String ttl, String prio)
{
JSONObject data = new JSONObject();
data.put("name", name);
data.put("type", type);
data.put("content", content);
data.put("ttl", ttl);
data.put("prio", prio);
String commandEndpoint = endpoint+"/dns/edit/"+domain+"/"+id;
JSONObject result = sendCommand(commandEndpoint, data);
return(result);
}
static JSONObject retrieve(String domain)
{
JSONObject data = new JSONObject();
String commandEndpoint = endpoint+"/dns/retrieve/"+domain;
JSONObject result = sendCommand(commandEndpoint, data);
return(result);
}
static JSONObject ping()
{
JSONObject data = new JSONObject();
String commandEndpoint = endpoint+"/ping";
JSONObject result = sendCommand(commandEndpoint, data);
return(result);
}
static JSONObject sendCommand(String url, JSONObject data)
{
JSONObject result = null;
data.put("secretapikey", secretapikey);
data.put("apikey", apikey);
try (final CloseableHttpClient httpclient = HttpClients.createDefault())
{
final HttpPost httpPost = new HttpPost(url);
StringEntity entity = new StringEntity(data.toString());
httpPost.setEntity(entity);
try (final CloseableHttpResponse response = httpclient.execute(httpPost))
{
System.out.println(response.getCode() + " " + response.getReasonPhrase());
final HttpEntity entity2 = response.getEntity();
String responseString = EntityUtils.toString(entity2, "UTF-8");
result = new JSONObject(responseString);
EntityUtils.consume(entity2);
}
catch(Exception e)
{
e.printStackTrace();
return(null);
}
}
catch(Exception e)
{
e.printStackTrace();
return(null);
}
return(result);
}
}
此代码来自porkbun-dynamic-dns-java，当我登录时它在我的 Linux 上运行良好。
但是当我让这个脚本在启动时运行时，我得到了这个错误：
API endpoint: https://porkbun.com/api/json/v3
apikey: xxxxx
secretapikey: xxxxx
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
java.net.UnknownHostException: porkbun.com: Falha temporária na resolução de nome
at java.base/java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.base/java.net.InetAddress$PlatformNameService.lookupAllHostAddr(InetAddress.java:932)
at java.base/java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1517)
at java.base/java.net.InetAddress$NameServiceAddresses.get(InetAddress.java:851)
at java.base/java.net.InetAddress.getAllByName0(InetAddress.java:1507)
at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1366)
at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1300)
at org.apache.hc.client5.http.SystemDefaultDnsResolver.resolve(SystemDefaultDnsResolver.java:43)
at org.apache.hc.client5.http.impl.io.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:118)
at org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:409)
at org.apache.hc.client5.http.impl.classic.InternalExecRuntime.connectEndpoint(InternalExecRuntime.java:164)
at org.apache.hc.client5.http.impl.classic.InternalExecRuntime.connectEndpoint(InternalExecRuntime.java:174)
at org.apache.hc.client5.http.impl.classic.ConnectExec.execute(ConnectExec.java:135)
at org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51)
at org.apache.hc.client5.http.impl.classic.ExecChainElement$1.proceed(ExecChainElement.java:57)
at org.apache.hc.client5.http.impl.classic.ProtocolExec.execute(ProtocolExec.java:172)
at org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51)
at org.apache.hc.client5.http.impl.classic.ExecChainElement$1.proceed(ExecChainElement.java:57)
at org.apache.hc.client5.http.impl.classic.HttpRequestRetryExec.execute(HttpRequestRetryExec.java:93)
at org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51)
at org.apache.hc.client5.http.impl.classic.ExecChainElement$1.proceed(ExecChainElement.java:57)
at org.apache.hc.client5.http.impl.classic.ContentCompressionExec.execute(ContentCompressionExec.java:128)
at org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51)
at org.apache.hc.client5.http.impl.classic.ExecChainElement$1.proceed(ExecChainElement.java:57)
at org.apache.hc.client5.http.impl.classic.RedirectExec.execute(RedirectExec.java:116)
at org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51)
at org.apache.hc.client5.http.impl.classic.InternalHttpClient.doExecute(InternalHttpClient.java:178)
at org.apache.hc.client5.http.impl.classic.CloseableHttpClient.execute(CloseableHttpClient.java:75)
at org.apache.hc.client5.http.impl.classic.CloseableHttpClient.execute(CloseableHttpClient.java:89)
at PorkbunDynDNSClient.sendCommand(PorkbunDynDNSClient.java:239)
at PorkbunDynDNSClient.ping(PorkbunDynDNSClient.java:220)
at PorkbunDynDNSClient.main(PorkbunDynDNSClient.java:142)
Exception in thread "main" java.lang.NullPointerException: Cannot invoke "org.json.JSONObject.get(String)" because "<local6>" is null
at PorkbunDynDNSClient.main(PorkbunDynDNSClient.java:143)
API endpoint: https://porkbun.com/api/json/v3
apikey: xxxxx
secretapikey: xxxxx
Detected current IPv6 as 1xx.xxx.xxx.xxx.
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
java.net.UnknownHostException: porkbun.com: Falha temporária na resolução de nome
at java.base/java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.base/java.net.InetAddress$PlatformNameService.lookupAllHostAddr(InetAddress.java:932)
at java.base/java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1517)
at java.base/java.net.InetAddress$NameServiceAddresses.get(InetAddress.java:851)
at java.base/java.net.InetAddress.getAllByName0(InetAddress.java:1507)
at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1366)
at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1300)
at org.apache.hc.client5.http.SystemDefaultDnsResolver.resolve(SystemDefaultDnsResolver.java:43)
at org.apache.hc.client5.http.impl.io.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:118)
at org.apache.hc.client5.http.impl.io.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:409)
at org.apache.hc.client5.http.impl.classic.InternalExecRuntime.connectEndpoint(InternalExecRuntime.java:164)
at org.apache.hc.client5.http.impl.classic.InternalExecRuntime.connectEndpoint(InternalExecRuntime.java:174)
at org.apache.hc.client5.http.impl.classic.ConnectExec.execute(ConnectExec.java:135)
at org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51)
at org.apache.hc.client5.http.impl.classic.ExecChainElement$1.proceed(ExecChainElement.java:57)
at org.apache.hc.client5.http.impl.classic.ProtocolExec.execute(ProtocolExec.java:172)
at org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51)
at org.apache.hc.client5.http.impl.classic.ExecChainElement$1.proceed(ExecChainElement.java:57)
at org.apache.hc.client5.http.impl.classic.HttpRequestRetryExec.execute(HttpRequestRetryExec.java:93)
at org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51)
at org.apache.hc.client5.http.impl.classic.ExecChainElement$1.proceed(ExecChainElement.java:57)
at org.apache.hc.client5.http.impl.classic.ContentCompressionExec.execute(ContentCompressionExec.java:128)
at org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51)
at org.apache.hc.client5.http.impl.classic.ExecChainElement$1.proceed(ExecChainElement.java:57)
at org.apache.hc.client5.http.impl.classic.RedirectExec.execute(RedirectExec.java:116)
at org.apache.hc.client5.http.impl.classic.ExecChainElement.execute(ExecChainElement.java:51)
at org.apache.hc.client5.http.impl.classic.InternalHttpClient.doExecute(InternalHttpClient.java:178)
at org.apache.hc.client5.http.impl.classic.CloseableHttpClient.execute(CloseableHttpClient.java:75)
at org.apache.hc.client5.http.impl.classic.CloseableHttpClient.execute(CloseableHttpClient.java:89)
at PorkbunDynDNSClient.sendCommand(PorkbunDynDNSClient.java:239)
at PorkbunDynDNSClient.retrieve(PorkbunDynDNSClient.java:211)
at PorkbunDynDNSClient.main(PorkbunDynDNSClient.java:155)
Exception in thread "main" java.lang.NullPointerException: Cannot invoke "org.json.JSONObject.get(String)" because "<local6>" is null
at PorkbunDynDNSClient.main(PorkbunDynDNSClient.java:156)
我假设这是因为在启动时我仍然没有发布的 IPv6 地址。
我无法修复此错误。
有人可以帮忙吗？
【问题讨论】：