HTTP
リクエストを送信するアプリを作成しようとしていますApache経由 HC 4経由SOCKS5プロキシ。アプリがマルチスレッド化されているため、アプリグローバルプロキシを使用できません(HttpClient
インスタンスごとに異なるプロキシが必要です)。 HC4でのSOCKS5の使用例は見つかりませんでした。どうすれば使用できますか?
SOCKは、HTTPではなく、TCP/IPレベルのプロキシプロトコルです。そのままではHttpClientではサポートされていません。
カスタム接続ソケットファクトリを使用して、HttpClientをカスタマイズし、SOCKSプロキシ経由で接続を確立できます。
編集:プレーンソケットの代わりにSSLに変更
Registry<ConnectionSocketFactory> reg = RegistryBuilder.<ConnectionSocketFactory>create()
.register("http", PlainConnectionSocketFactory.INSTANCE)
.register("https", new MyConnectionSocketFactory(SSLContexts.createSystemDefault()))
.build();
PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager(reg);
CloseableHttpClient httpclient = HttpClients.custom()
.setConnectionManager(cm)
.build();
try {
InetSocketAddress socksaddr = new InetSocketAddress("mysockshost", 1234);
HttpClientContext context = HttpClientContext.create();
context.setAttribute("socks.address", socksaddr);
HttpHost target = new HttpHost("localhost", 80, "http");
HttpGet request = new HttpGet("/");
System.out.println("Executing request " + request + " to " + target + " via SOCKS proxy " + socksaddr);
CloseableHttpResponse response = httpclient.execute(target, request, context);
try {
System.out.println("----------------------------------------");
System.out.println(response.getStatusLine());
EntityUtils.consume(response.getEntity());
} finally {
response.close();
}
} finally {
httpclient.close();
}
static class MyConnectionSocketFactory extends SSLConnectionSocketFactory {
public MyConnectionSocketFactory(final SSLContext sslContext) {
super(sslContext);
}
@Override
public Socket createSocket(final HttpContext context) throws IOException {
InetSocketAddress socksaddr = (InetSocketAddress) context.getAttribute("socks.address");
Proxy proxy = new Proxy(Proxy.Type.SOCKS, socksaddr);
return new Socket(proxy);
}
}
上記の答えは、あなたの国がDNSレコードにも害を及ぼさない限り、かなりうまくいきます。 Java「プロキシ経由で接続している間はDNSサーバーを使用しないでください」と言うのは非常に困難です。
Javaランタイム6とsocks v5プロキシ-可能ですか?
また、ローカルでホスト名を解決しようとするため、Apache HttpClientも困難です。上記のコードにいくつかの変更を加えることで、これを処理できます。
static class FakeDnsResolver implements DnsResolver {
@Override
public InetAddress[] resolve(String Host) throws UnknownHostException {
// Return some fake DNS record for every request, we won't be using it
return new InetAddress[] { InetAddress.getByAddress(new byte[] { 1, 1, 1, 1 }) };
}
}
static class MyConnectionSocketFactory extends PlainConnectionSocketFactory {
@Override
public Socket createSocket(final HttpContext context) throws IOException {
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, HttpHost Host, InetSocketAddress remoteAddress,
InetSocketAddress localAddress, HttpContext context) throws IOException {
// Convert address to unresolved
InetSocketAddress unresolvedRemote = InetSocketAddress
.createUnresolved(Host.getHostName(), remoteAddress.getPort());
return super.connectSocket(connectTimeout, socket, Host, unresolvedRemote, localAddress, context);
}
}
static class MySSLConnectionSocketFactory extends SSLConnectionSocketFactory {
public MySSLConnectionSocketFactory(final SSLContext sslContext) {
// You may need this verifier if target site's certificate is not secure
super(sslContext, ALLOW_ALL_HOSTNAME_VERIFIER);
}
@Override
public Socket createSocket(final HttpContext context) throws IOException {
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, HttpHost Host, InetSocketAddress remoteAddress,
InetSocketAddress localAddress, HttpContext context) throws IOException {
// Convert address to unresolved
InetSocketAddress unresolvedRemote = InetSocketAddress
.createUnresolved(Host.getHostName(), remoteAddress.getPort());
return super.connectSocket(connectTimeout, socket, Host, unresolvedRemote, localAddress, context);
}
}
public static void main(String[] args) throws Exception {
Registry<ConnectionSocketFactory> reg = RegistryBuilder.<ConnectionSocketFactory> create()
.register("http", new MyConnectionSocketFactory())
.register("https", new MySSLConnectionSocketFactory(SSLContexts.createSystemDefault())).build();
PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager(reg, new FakeDnsResolver());
CloseableHttpClient httpclient = HttpClients.custom().setConnectionManager(cm).build();
try {
InetSocketAddress socksaddr = new InetSocketAddress("mysockshost", 1234);
HttpClientContext context = HttpClientContext.create();
context.setAttribute("socks.address", socksaddr);
HttpGet request = new HttpGet("https://www.funnyordie.com");
System.out.println("Executing request " + request + " via SOCKS proxy " + socksaddr);
CloseableHttpResponse response = httpclient.execute(request, context);
try {
System.out.println("----------------------------------------");
System.out.println(response.getStatusLine());
int i = -1;
InputStream stream = response.getEntity().getContent();
while ((i = stream.read()) != -1) {
System.out.print((char) i);
}
EntityUtils.consume(response.getEntity());
} finally {
response.close();
}
} finally {
httpclient.close();
}
}
@olegの回答に触発されました。呼び出し方法に特別な制約を課すことなく、適切に構成されたCloseableHttpClientを提供するユーティリティを作成できます。
ConnectionSocketFactoryでProxySelectorを使用してプロキシを選択できます。
CloseableHttpClientインスタンスを構築するためのユーティリティクラス:
import org.Apache.http.HttpHost;
import org.Apache.http.config.Registry;
import org.Apache.http.config.RegistryBuilder;
import org.Apache.http.conn.socket.ConnectionSocketFactory;
import org.Apache.http.conn.socket.PlainConnectionSocketFactory;
import org.Apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.Apache.http.impl.client.CloseableHttpClient;
import org.Apache.http.impl.client.HttpClients;
import org.Apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.Apache.http.protocol.HttpContext;
import org.Apache.http.protocol.HttpCoreContext;
import org.Apache.http.ssl.SSLContexts;
import javax.net.ssl.SSLContext;
import Java.io.IOException;
import Java.net.*;
public final class HttpHelper {
public static CloseableHttpClient createClient()
{
Registry<ConnectionSocketFactory> reg = RegistryBuilder.<ConnectionSocketFactory>create()
.register("http", ProxySelectorPlainConnectionSocketFactory.INSTANCE)
.register("https", new ProxySelectorSSLConnectionSocketFactory(SSLContexts.createSystemDefault()))
.build();
PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager(reg);
return HttpClients.custom()
.setConnectionManager(cm)
.build();
}
private enum ProxySelectorPlainConnectionSocketFactory implements ConnectionSocketFactory {
INSTANCE;
@Override
public Socket createSocket(HttpContext context) {
return HttpHelper.createSocket(context);
}
@Override
public Socket connectSocket(int connectTimeout, Socket sock, HttpHost Host, InetSocketAddress remoteAddress, InetSocketAddress localAddress, HttpContext context) throws IOException {
return PlainConnectionSocketFactory.INSTANCE.connectSocket(connectTimeout, sock, Host, remoteAddress, localAddress, context);
}
}
private static final class ProxySelectorSSLConnectionSocketFactory extends SSLConnectionSocketFactory {
ProxySelectorSSLConnectionSocketFactory(SSLContext sslContext) {
super(sslContext);
}
@Override
public Socket createSocket(HttpContext context) {
return HttpHelper.createSocket(context);
}
}
private static Socket createSocket(HttpContext context) {
HttpHost httpTargetHost = (HttpHost) context.getAttribute(HttpCoreContext.HTTP_TARGET_Host);
URI uri = URI.create(httpTargetHost.toURI());
Proxy proxy = ProxySelector.getDefault().select(uri).iterator().next();
return new Socket(proxy);
}
}
それを使用するクライアントコード:
import com.okta.tools.helpers.HttpHelper;
import org.Apache.http.client.methods.CloseableHttpResponse;
import org.Apache.http.client.methods.HttpGet;
import org.Apache.http.impl.client.CloseableHttpClient;
import org.Apache.http.util.EntityUtils;
import Java.io.IOException;
import Java.net.URI;
public class Main {
public static void main(String[] args) throws IOException {
URI uri = URI.create("http://example.com/");
HttpGet request = new HttpGet(uri);
try (CloseableHttpClient closeableHttpClient = HttpHelper.createClient()) {
try (CloseableHttpResponse response = closeableHttpClient.execute(request)) {
System.out.println("----------------------------------------");
System.out.println(response.getStatusLine());
System.out.println(EntityUtils.toString(response.getEntity()));
}
}
}
}