java.net.UnknownHostException：主机是未解析的 SOCKS 代理

Posted 2023-02-24

【中文标题】java.net.UnknownHostException：主机是未解析的 SOCKS 代理

【英文标题】：java.net.UnknownHostException: Host is unresolved SOCKS proxy

【发布时间】：2018-11-13 03:06:55

【问题描述】：

我在特定端口上设置了 Tor，并希望通过该端口访问该网站。以下代码在 android 7.0 中完美运行，但在 android 6.0 中出现以下错误。可能是什么问题？ Tor 服务在我发送请求的特定端口成功运行。 运行这个库的示例代码（https://github.com/jehy/Tor-Onion-Proxy-Library）

错误

java.net.UnknownHostException：主机未解析：google.com W/System.err：在 java.net.Socket.connect(Socket.java:893) W / System.err：在 cz.msebera.android.httpclient.conn.socket.PlainConnectionSocketFactory.connectSocket(PlainConnectionSocketFactory.java:74) W / System.err：在 com.example.nandan.sampletorproxyapp.MyConnectionSocketFactory.connectSocket(MyConnectionSocketFactory.java:33) W / System.err：在 cz.msebera.android.httpclient.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:134) W / System.err：在 cz.msebera.android.httpclient.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:353) W / System.err：在 cz.msebera.android.httpclient.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:380) W / System.err：在 cz.msebera.android.httpclient.impl.execchain.MainClientExec.execute(MainClientExec.java:236) W / System.err：在 cz.msebera.android.httpclient.impl.execchain.ProtocolExec.execute(ProtocolExec.java:184) W / System.err：在 cz.msebera.android.httpclient.impl.execchain.RetryExec.execute(RetryExec.java:88) W / System.err：在 cz.msebera.android.httpclient.impl.execchain.RedirectExec.execute(RedirectExec.java:110) W / System.err：在 cz.msebera.android.httpclient.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184) W / System.err：在 cz.msebera.android.httpclient.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82) W / System.err：在 cz.msebera.android.httpclient.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:55) W / System.err：在 com.example.nandan.sampletorproxyapp.MainActivity$TorTask.doInBackground(MainActivity.java:85) W / System.err：在 com.example.nandan.sampletorproxyapp.MainActivity$TorTask.doInBackground(MainActivity.java:60) W/System.err：在 android.os.AsyncTask$2.call(AsyncTask.java:295) W / System.err：在 java.util.concurrent.FutureTask.run(FutureTask.java:237) W/System.err: 在 android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234) W / System.err：在 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113) W / System.err：在 java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588) W/System.err：在 java.lang.Thread.run(Thread.java:818)

主要活动

HttpClient httpClient = getNewHttpClient();
int port = onionProxyManager.getIPv4LocalHostSocksPort();
InetSocketAddress socksaddr = new InetSocketAddress("127.0.0.1", port);
HttpClientContext context = HttpClientContext.create();
context.setAttribute("socks.address", socksaddr);
HttpGet httpGet = new HttpGet("http://google.co.in");     
HttpResponse httpResponse = httpClient.execute(httpGet, context); // GETTING ERROR HERE



static class FakeDnsResolver implements DnsResolver 
    @Override
    public InetAddress[] resolve(String host) throws UnknownHostException 
        return new InetAddress[]  InetAddress.getByAddress(new byte[]  1, 1, 1, 1 ) ;
    



public HttpClient getNewHttpClient() 

    Registry<ConnectionSocketFactory> reg = RegistryBuilder.<ConnectionSocketFactory>create()
            .register("http", new MyConnectionSocketFactory())
            .build();
    PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager(reg,new FakeDnsResolver());
    return HttpClients.custom()
            .setConnectionManager(cm)
            .build();

MyConnectionSocketFactory.java

import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.net.Socket;

import cz.msebera.android.httpclient.HttpHost;
import cz.msebera.android.httpclient.conn.socket.PlainConnectionSocketFactory;
import cz.msebera.android.httpclient.protocol.HttpContext;

public class MyConnectionSocketFactory extends PlainConnectionSocketFactory 

    @Override
    public Socket createSocket(final HttpContext context) 
        InetSocketAddress socksaddr = (InetSocketAddress) context.getAttribute("socks.address");
        Proxy proxy = new Proxy(Proxy.Type.SOCKS, socksaddr);
        return new Socket(proxy);
    

    @Override
    public Socket connectSocket(
            int connectTimeout,
            Socket socket,
            final HttpHost host,
            final InetSocketAddress remoteAddress,
            final InetSocketAddress localAddress,
            final HttpContext context) throws IOException

        InetSocketAddress unresolvedRemote = InetSocketAddress
                .createUnresolved(host.getHostName(), remoteAddress.getPort());
        return super.connectSocket(connectTimeout, socket, host, unresolvedRemote, localAddress, context);
    

【参考方案1】：

尝试改变

HttpGet httpGet = new HttpGet("http:google.co.in"); 

到

HttpGet httpGet = new HttpGet("http://google.co.in");  

或

URI uri = new URIBuilder()
            .setScheme("http")
            .setHost("google.co.in")
            .build();
HttpGet httpGet = new HttpGet(uri);

更新 - 试试这个

HttpHost target = new HttpHost("google.co.in", 80, "http");
HttpGet httpGet = new HttpGet("/");
HttpResponse httpResponse = httpClient.execute(target, httpGet, context);

如果它不起作用，我不太确定。也许试试这个链接希望这有助于How to use HttpClientBuilder with Http proxy?

【讨论】：

我使用的是HttpGet httpGet = new HttpGet("http://google.co.in");，对不起，我确实弄错了为什么发布这个问题。第二个也不行。

更新了我的答案。希望对您有所帮助

另外，如果您打印port 变量，它会给您一个有效的端口号还是为空？