Enable HTTP/2 over TLS in http-client

CHANGES

@@ -19,6 +19,9 @@ Platform 3.28
 
   We now handle the Retry-After: header of 429 HTTP status codes.
 
+  HTTP/2 now works over TLS, negotiating with the server using ALPN.
+  HTTP/2 may be enabled using the "http-client.http2.enabled" configuration property.
+
 * Maven plugin upgrades
 
   - maven-deploy-plugin to 3.1.3 (was 2.8.2)

http-client/src/main/java/com/proofpoint/http/client/jetty/JettyHttpClient.java

@@ -24,15 +24,17 @@
 import org.eclipse.jetty.client.InputStreamResponseListener;
 import org.eclipse.jetty.client.Response;
 import org.eclipse.jetty.client.Socks4Proxy;
-import org.eclipse.jetty.client.transport.HttpClientTransportOverHTTP;
+import org.eclipse.jetty.client.transport.HttpClientConnectionFactory;
+import org.eclipse.jetty.client.transport.HttpClientTransportDynamic;
 import org.eclipse.jetty.client.transport.HttpDestination;
 import org.eclipse.jetty.client.transport.HttpExchange;
 import org.eclipse.jetty.client.transport.HttpRequest;
 import org.eclipse.jetty.client.transport.internal.HttpConnectionOverHTTP;
 import org.eclipse.jetty.http.HttpCookieStore;
 import org.eclipse.jetty.http2.client.HTTP2Client;
-import org.eclipse.jetty.http2.client.transport.HttpClientTransportOverHTTP2;
+import org.eclipse.jetty.http2.client.transport.ClientConnectionFactoryOverHTTP2;
 import org.eclipse.jetty.io.ArrayByteBufferPool;
+import org.eclipse.jetty.io.ClientConnectionFactory;
 import org.eclipse.jetty.io.ClientConnector;
 import org.eclipse.jetty.util.component.LifeCycle;
 import org.eclipse.jetty.util.ssl.SslContextFactory;
@@ -179,22 +181,27 @@ public JettyHttpClient(
             sslContextFactory.setTrustAll(true);
         }
 
-        HttpClientTransport transport;
+        ClientConnector clientConnector = new ClientConnector();
+        clientConnector.setSelectors(config.getSelectorCount());
+        clientConnector.setSslContextFactory(sslContextFactory);
+
+        ImmutableList.Builder<ClientConnectionFactory.Info> protocols = ImmutableList.builder();
         if (config.isHttp2Enabled()) {
-            HTTP2Client client = new HTTP2Client();
+            HTTP2Client client = new HTTP2Client(clientConnector);
             client.setInitialSessionRecvWindow(toIntExact(config.getHttp2InitialSessionReceiveWindowSize().toBytes()));
             client.setInitialStreamRecvWindow(toIntExact(config.getHttp2InitialStreamReceiveWindowSize().toBytes()));
             client.setInputBufferSize(toIntExact(config.getHttp2InputBufferSize().toBytes()));
-            client.setSelectors(config.getSelectorCount());
-            transport = new HttpClientTransportOverHTTP2(client);
-        }
-        else {
-            ClientConnector clientConnector = new ClientConnector();
-            clientConnector.setSelectors(config.getSelectorCount());
-            clientConnector.setSslContextFactory(sslContextFactory);
-            transport = new HttpClientTransportOverHTTP(clientConnector);
+            client.setStreamIdleTimeout(idleTimeoutMillis);
+            protocols.add(new ClientConnectionFactoryOverHTTP2.HTTP2(client));
         }
 
+        protocols.add(HttpClientConnectionFactory.HTTP11);
+
+        // The order of the protocols indicates the client's preference.
+        // The first is the most preferred, the last is the least preferred, but
+        // the protocol version to use can be explicitly specified in the request.
+        HttpClientTransport transport = new HttpClientTransportDynamic(clientConnector, protocols.build().toArray(new ClientConnectionFactory.Info[0]));
+
         httpClient = new AuthorizationPreservingHttpClient(transport);
 
         // request and response buffer size

http-client/src/test/java/com/proofpoint/http/client/AbstractHttpClientTest.java

@@ -12,6 +12,8 @@
 import com.proofpoint.tracetoken.TraceToken;
 import com.proofpoint.units.Duration;
 import org.eclipse.jetty.alpn.server.ALPNServerConnectionFactory;
+import org.eclipse.jetty.ee10.servlet.ServletContextHandler;
+import org.eclipse.jetty.ee10.servlet.ServletHolder;
 import org.eclipse.jetty.http2.server.HTTP2CServerConnectionFactory;
 import org.eclipse.jetty.http2.server.HTTP2ServerConnectionFactory;
 import org.eclipse.jetty.server.ConnectionFactory;
@@ -23,8 +25,6 @@
 import org.eclipse.jetty.server.SslConnectionFactory;
 import org.eclipse.jetty.server.handler.ContextHandlerCollection;
 import org.eclipse.jetty.server.handler.gzip.GzipHandler;
-import org.eclipse.jetty.ee10.servlet.ServletContextHandler;
-import org.eclipse.jetty.ee10.servlet.ServletHolder;
 import org.eclipse.jetty.util.ssl.SslContextFactory;
 import org.testng.Assert;
 import org.testng.SkipException;
@@ -1292,7 +1292,15 @@ public void testConnectReadRequestWriteJunkHangup()
     public void testDynamicBodySourceConnectWriteRequestClose()
             throws Exception
     {
-        try (FakeServer fakeServer = new FakeServer(scheme, host, 1024, null, true)) {
+        int bodySize;
+        if (createClientConfig().isHttp2Enabled()) {
+            // HTTP/2 over TLS has smaller buffers for this
+            bodySize = 256;
+        } else {
+            bodySize = 1024;
+        }
+
+        try (FakeServer fakeServer = new FakeServer(scheme, host, bodySize, null, true)) {
             HttpClientConfig config = createClientConfig();
             config.setConnectTimeout(new Duration(5, SECONDS));
             config.setIdleTimeout(new Duration(5, SECONDS));
@@ -1308,7 +1316,7 @@ public void testDynamicBodySourceConnectWriteRequestClose()
                         .setUri(fakeServer.getUri())
                         .setBodySource((DynamicBodySource) out -> () -> {
                             if (invocation.getAndIncrement() < 100) {
-                                out.write(new byte[1024]);
+                                out.write(new byte[bodySize]);
                             }
                             else {
                                 out.close();

http-client/src/test/java/com/proofpoint/http/client/jetty/TestJettyHttpsClientHttp2.java

@@ -13,9 +13,4 @@ protected HttpClientConfig createClientConfig()
         return super.createClientConfig()
                 .setHttp2Enabled(true);
     }
-
-    @BeforeMethod
-    public void checkValidConfiguration(){
-        throw new SkipException("Https is not supported for Http/2");
-    }
 }