Additional logging for SNI

core-client/src/main/java/org/glassfish/jersey/client/innate/http/SniConfigurator.java

@@ -16,6 +16,8 @@
 
 package org.glassfish.jersey.client.innate.http;
 
+import org.glassfish.jersey.client.internal.LocalizationMessages;
+
 import javax.net.ssl.SNIHostName;
 import javax.net.ssl.SNIServerName;
 import javax.net.ssl.SSLEngine;
@@ -27,12 +29,14 @@
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
+import java.util.logging.Logger;
 
 /**
  * A unified routines to set {@link SNIHostName} for the {@link javax.net.ssl.SSLContext}.
  * To be reused in connectors.
  */
 final class SniConfigurator {
+    private static final Logger LOGGER = Logger.getLogger(SniConfigurator.class.getName());
     private final String hostName;
     private SniConfigurator(String hostName) {
         this.hostName = hostName;
@@ -85,6 +89,7 @@ void setServerNames(SSLEngine sslEngine) {
         SSLParameters sslParameters = sslEngine.getSSLParameters();
         updateSSLParameters(sslParameters);
         sslEngine.setSSLParameters(sslParameters);
+        LOGGER.fine(LocalizationMessages.SNI_ON_SSLENGINE());
     }
 
     /**
@@ -95,6 +100,7 @@ void setServerNames(SSLSocket sslSocket) {
         SSLParameters sslParameters = sslSocket.getSSLParameters();
         updateSSLParameters(sslParameters);
         sslSocket.setSSLParameters(sslParameters);
+        LOGGER.fine(LocalizationMessages.SNI_ON_SSLSOCKET());
     }
 
     private SSLParameters updateSSLParameters(SSLParameters sslParameters) {
@@ -103,6 +109,7 @@ private SSLParameters updateSSLParameters(SSLParameters sslParameters) {
         serverNames.add(serverName);
 
         sslParameters.setServerNames(serverNames);
+        LOGGER.finer(LocalizationMessages.SNI_UPDATE_SSLPARAMS(hostName));
 
         return sslParameters;
     }

core-client/src/main/java/org/glassfish/jersey/client/internal/HttpUrlConnector.java

@@ -345,7 +345,13 @@ private ClientResponse _apply(final ClientRequest request) throws IOException {
         final HttpURLConnection uc;
         final Optional<ClientProxy> proxy = ClientProxy.proxyFromRequest(request);
         final SSLParamConfigurator sniConfig = SSLParamConfigurator.builder().request(request).build();
-        final URI sniUri = sniConfig.isSNIRequired() ? sniConfig.toIPRequestUri() : request.getUri();
+        final URI sniUri;
+        if (sniConfig.isSNIRequired()) {
+            sniUri = sniConfig.toIPRequestUri();
+            LOGGER.fine(LocalizationMessages.SNI_URI_REPLACED(sniUri.getHost(), request.getUri().getHost()));
+        } else {
+            sniUri = request.getUri();
+        }
 
         proxy.ifPresent(clientProxy -> ClientProxy.setBasicAuthorizationHeader(request.getHeaders(), proxy.get()));
         uc = this.connectionFactory.getConnection(sniUri.toURL(), proxy.isPresent() ? proxy.get().proxy() : null);

core-client/src/main/resources/org/glassfish/jersey/client/internal/localization.properties

@@ -83,6 +83,10 @@ restricted.header.property.setting.false=Restricted headers are not enabled usin
 restricted.header.property.setting.true=Restricted headers are enabled using [{0}] system property(setting only takes effect on\
    connections created after the property has been set/changed).
 request.entity.already.written=The entity was already written in this request. The entity can be written (serialized into the output stream) only once per a request.
+sni.on.sslsocket=Setting SNIServerName on SSLSocket
+sni.on.sslengine=Setting SNIServerName on SSLEngine
+sni.uri.replaced=HTTP Request sent with request to IP address {0} rather than the hostname {1}.
+sni.update.sslparams=Updating SSLParameters for SNIServerName={0}.
 unexpected.error.response.processing=Unexpected error during response processing.
 use.encoding.ignored=Value {1} of {0} client property will be ignored as it is not a valid supported encoding. \
   Valid supported encodings are: {2}