1 files changed, 72 insertions, 0 deletions
diff --git a/jaxrs_client_utils/src/main/java/ai/vespa/util/http/VespaClientBuilderFactory.java b/jaxrs_client_utils/src/main/java/ai/vespa/util/http/VespaClientBuilderFactory.java
new file mode 100644
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+++ b/jaxrs_client_utils/src/main/java/ai/vespa/util/http/VespaClientBuilderFactory.java
@@ -0,0 +1,72 @@
+// Copyright 2019 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package ai.vespa.util.http;
+
+import com.yahoo.security.tls.MixedMode;
+import com.yahoo.security.tls.TlsContext;
+import com.yahoo.security.tls.TransportSecurityUtils;
+
+import javax.ws.rs.client.ClientBuilder;
+import javax.ws.rs.client.ClientRequestContext;
+import javax.ws.rs.client.ClientRequestFilter;
+import javax.ws.rs.core.UriBuilder;
+import java.net.URI;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ * Factory for JAX-RS http client builder for internal Vespa communications over http/https.
+ *
+ * Notes:
+ *  - hostname verification is not enabled - CN/SAN verification is assumed to be handled by the underlying x509 trust manager.
+ *  - ssl context or hostname verifier must not be overriden by the caller
+ *
+ * @author bjorncs
+ */
+public class VespaClientBuilderFactory implements AutoCloseable {
+
+    private static final Logger log = Logger.getLogger(VespaClientBuilderFactory.class.getName());
+
+    private final TlsContext tlsContext = TransportSecurityUtils.createTlsContext().orElse(null);
+    private final MixedMode mixedMode = TransportSecurityUtils.getInsecureMixedMode();
+
+    public ClientBuilder newBuilder() {
+        ClientBuilder builder = ClientBuilder.newBuilder();
+        setSslConfiguration(builder);
+        return builder;
+    }
+
+    private void setSslConfiguration(ClientBuilder builder) {
+        if (tlsContext != null) {
+            builder.sslContext(tlsContext.context());
+            builder.hostnameVerifier((hostname, sslSession) -> true); // disable hostname verification
+            if (mixedMode != MixedMode.PLAINTEXT_CLIENT_MIXED_SERVER) {
+                builder.register(new UriRewritingRequestFilter());
+            }
+        }
+    }
+
+    @Override
+    public void close() {
+        if (tlsContext != null) {
+            tlsContext.close();
+        }
+    }
+
+    static class UriRewritingRequestFilter implements ClientRequestFilter {
+        @Override
+        public void filter(ClientRequestContext requestContext) {
+            requestContext.setUri(rewriteUri(requestContext.getUri()));
+        }
+
+        private static URI rewriteUri(URI originalUri) {
+            if (!originalUri.getScheme().equals("http")) {
+                return originalUri;
+            }
+            int port = originalUri.getPort();
+            int rewrittenPort = port != -1 ? port : 80;
+            URI rewrittenUri = UriBuilder.fromUri(originalUri).scheme("https").port(rewrittenPort).build();
+            log.log(Level.FINE, () -> String.format("Uri rewritten from '%s' to '%s'", originalUri, rewrittenUri));
+            return rewrittenUri;
+        }
+    }
+}