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* Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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import com.sun.net.httpserver.HttpContext;
import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServer;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.net.ProxySelector;
import java.net.SocketAddress;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.charset.StandardCharsets;
import java.security.NoSuchAlgorithmException;
import java.util.List;
import java.util.Set;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.util.stream.Collectors;
import static java.net.Proxy.NO_PROXY;
/**
* @test
* @bug 8230526
* @summary Verifies that PlainProxyConnections are cached and reused properly. We do this by
* verifying that the remote address of the HTTP exchange (on the fake proxy server)
* is always the same InetSocketAddress.
* @modules jdk.httpserver
* @run main/othervm PlainProxyConnectionTest
* @author danielfuchs
*/
public class PlainProxyConnectionTest {
static final String RESPONSE = "<html><body><p>Hello World!</body></html>";
static final String PATH = "/foo/";
static final ConcurrentLinkedQueue<InetSocketAddress> connections = new ConcurrentLinkedQueue<>();
// For convenience the server is used both as a plain server and as a plain proxy.
// When used as a proxy, it serves the request itself instead of forwarding it
// to the requested server.
static HttpServer createHttpsServer() throws IOException, NoSuchAlgorithmException {
HttpServer server = com.sun.net.httpserver.HttpServer.create();
HttpContext context = server.createContext(PATH);
context.setHandler(new HttpHandler() {
@Override
public void handle(HttpExchange he) throws IOException {
connections.add(he.getRemoteAddress());
he.getResponseHeaders().add("encoding", "UTF-8");
byte[] bytes = RESPONSE.getBytes(StandardCharsets.UTF_8);
he.sendResponseHeaders(200, bytes.length > 0 ? bytes.length : -1);
he.getResponseBody().write(bytes);
he.close();
}
});
InetSocketAddress addr = new InetSocketAddress(InetAddress.getLoopbackAddress(), 0);
server.bind(addr, 0);
return server;
}
public static void main(String[] args)
throws IOException,
URISyntaxException,
NoSuchAlgorithmException,
InterruptedException
{
HttpServer server = createHttpsServer();
server.start();
try {
test(server, HttpClient.Version.HTTP_1_1);
test(server, HttpClient.Version.HTTP_2);
} finally {
server.stop(0);
System.out.println("Server stopped");
}
}
/**
* A Proxy Selector that wraps a ProxySelector.of(), and counts the number
* of times its select method has been invoked. This can be used to ensure
* that the Proxy Selector is invoked only once per HttpClient.sendXXX
* invocation.
*/
static class CountingProxySelector extends ProxySelector {
private final ProxySelector proxySelector;
private volatile int count; // 0
private CountingProxySelector(InetSocketAddress proxyAddress) {
proxySelector = ProxySelector.of(proxyAddress);
}
public static CountingProxySelector of(InetSocketAddress proxyAddress) {
return new CountingProxySelector(proxyAddress);
}
int count() { return count; }
@Override
public List<Proxy> select(URI uri) {
count++;
return proxySelector.select(uri);
}
@Override
public void connectFailed(URI uri, SocketAddress sa, IOException ioe) {
proxySelector.connectFailed(uri, sa, ioe);
}
}
// The sanity test sends request to the server, and through the proxy,
// using the legacy HttpURLConnection to verify that server and proxy
// work as expected.
private static void performSanityTest(HttpServer server, URI uri, URI proxiedURI)
throws IOException {
connections.clear();
System.out.println("Verifying communication with server");
try (InputStream is = uri.toURL().openConnection(NO_PROXY).getInputStream()) {
String resp = new String(is.readAllBytes(), StandardCharsets.UTF_8);
System.out.println(resp);
if (!RESPONSE.equals(resp)) {
throw new AssertionError("Unexpected response from server");
}
}
System.out.println("Communication with server OK");
int count = connections.size();
if (count != 1) {
System.err.println("Unexpected connection count: " + count);
System.err.println("Connections: " + connections);
throw new AssertionError("Expected only one connection: " + connections);
}
try {
System.out.println("Pretending the server is a proxy...");
Proxy p = new Proxy(Proxy.Type.HTTP,
InetSocketAddress.createUnresolved(
server.getAddress().getAddress().getHostAddress(),
server.getAddress().getPort()));
System.out.println("Verifying communication with proxy");
HttpURLConnection conn = (HttpURLConnection) proxiedURI.toURL().openConnection(p);
try (InputStream is = conn.getInputStream()) {
String resp = new String(is.readAllBytes(), StandardCharsets.UTF_8);
System.out.println(resp);
if (!RESPONSE.equals(resp)) {
throw new AssertionError("Unexpected response from proxy");
}
}
count = connections.size();
if (count != 2) {
System.err.println("Unexpected connection count: " + count);
System.err.println("Connections: " + connections);
throw new AssertionError("Expected two connection: " + connections);
}
System.out.println("Communication with proxy OK");
} finally {
connections.clear();
}
}
public static void test(HttpServer server, HttpClient.Version version)
throws IOException,
URISyntaxException,
InterruptedException {
connections.clear();
System.out.println("\n===== Testing with " + version);
System.out.println("Server is: " + server.getAddress().toString());
URI uri = new URI("http", null,
server.getAddress().getAddress().getHostAddress(),
server.getAddress().getPort(), PATH + "x",
null, null);
URI proxiedURI = new URI("http://some.host.that.does.not.exist:4242" + PATH + "x");
performSanityTest(server, uri, proxiedURI);
try {
connections.clear();
System.out.println("\nReal test begins here.");
System.out.println("Setting up request with HttpClient for version: "
+ version.name());
// This will force the HTTP client to see the server as a proxy,
// and to (re)use a PlainProxyConnection to send the request
// to the fake `proxiedURI` at
// http://some.host.that.does.not.exist:4242/foo/x
//
CountingProxySelector ps = CountingProxySelector.of(
InetSocketAddress.createUnresolved(
server.getAddress().getAddress().getHostAddress(),
server.getAddress().getPort()));
HttpClient client = HttpClient.newBuilder()
.version(version)
.proxy(ps)
.build();
HttpRequest request = HttpRequest.newBuilder()
.uri(proxiedURI)
.GET()
.build();
System.out.println("Sending request with HttpClient: " + request);
HttpResponse<String> response
= client.send(request, HttpResponse.BodyHandlers.ofString());
System.out.println("Got response");
String resp = response.body();
System.out.println("Received: " + resp);
if (!RESPONSE.equals(resp)) {
throw new AssertionError("Unexpected response");
}
if (ps.count() > 1) {
throw new AssertionError("CountingProxySelector. Expected 1, got " + ps.count());
}
int count = connections.size();
if (count != 1) {
System.err.println("Unexpected connection count: " + count);
System.err.println("Connections: " + connections);
throw new AssertionError("Expected only one connection: " + connections);
}
for (int i = 2; i < 5; i++) {
System.out.println("Sending next request (" + i + ") with HttpClient: " + request);
response = client.send(request, HttpResponse.BodyHandlers.ofString());
System.out.println("Got response");
resp = response.body();
System.out.println("Received: " + resp);
if (!RESPONSE.equals(resp)) {
throw new AssertionError("Unexpected response");
}
if (ps.count() > i) {
throw new AssertionError("CountingProxySelector. Expected "
+ i + ", got " + ps.count());
}
count = connections.size();
if (count != i) {
System.err.println("Unexpected connection count: " + count);
System.err.println("Connections: " + connections);
throw new AssertionError("Expected " + i + ": " + connections);
}
}
Set<InetSocketAddress> remote = connections.stream().distinct().collect(Collectors.toSet());
count = remote.size();
if (count != 1) {
System.err.println("Unexpected connection count: " + count);
System.err.println("Connections: " + remote);
throw new AssertionError("Expected only one connection: " + remote);
} else {
System.out.println("PASSED: Proxy received only one connection from: " + remote);
}
} finally {
connections.clear();
}
}
}