add proxy handler for PUT request

gateway-ha/src/main/java/io/trino/gateway/proxyserver/ProxyRequestHandler.java

@@ -58,6 +58,7 @@
 import static io.airlift.http.client.Request.Builder.prepareDelete;
 import static io.airlift.http.client.Request.Builder.prepareGet;
 import static io.airlift.http.client.Request.Builder.preparePost;
+import static io.airlift.http.client.Request.Builder.preparePut;
 import static io.airlift.http.client.StaticBodyGenerator.createStaticBodyGenerator;
 import static io.airlift.jaxrs.AsyncResponseHandler.bindAsyncResponse;
 import static io.trino.gateway.ha.handler.ProxyUtils.QUERY_TEXT_LENGTH_FOR_HISTORY;
@@ -140,6 +141,17 @@ public void postRequest(
         performRequest(remoteUri, servletRequest, asyncResponse, request);
     }
 
+    public void putRequest(
+            String statement,
+            HttpServletRequest servletRequest,
+            AsyncResponse asyncResponse,
+            URI remoteUri)
+    {
+        Request.Builder request = preparePut()
+                .setBodyGenerator(createStaticBodyGenerator(statement, UTF_8));
+        performRequest(remoteUri, servletRequest, asyncResponse, request);
+    }
+
     private void performRequest(
             URI remoteUri,
             HttpServletRequest servletRequest,

gateway-ha/src/main/java/io/trino/gateway/proxyserver/RouteToBackendResource.java

@@ -20,6 +20,7 @@
 import jakarta.ws.rs.DELETE;
 import jakarta.ws.rs.GET;
 import jakarta.ws.rs.POST;
+import jakarta.ws.rs.PUT;
 import jakarta.ws.rs.Path;
 import jakarta.ws.rs.container.AsyncResponse;
 import jakarta.ws.rs.container.Suspended;
@@ -85,4 +86,15 @@ public void deleteHandler(
         String remoteUri = routingTargetHandler.getRoutingDestination(servletRequest);
         proxyRequestHandler.deleteRequest(servletRequest, asyncResponse, URI.create(remoteUri));
     }
+
+    @PUT
+    public void putHandler(
+            String body,
+            @Context HttpServletRequest servletRequest,
+            @Suspended AsyncResponse asyncResponse)
+    {
+        MultiReadHttpServletRequest multiReadHttpServletRequest = new MultiReadHttpServletRequest(servletRequest, body);
+        String remoteUri = routingTargetHandler.getRoutingDestination(multiReadHttpServletRequest);
+        proxyRequestHandler.putRequest(body, multiReadHttpServletRequest, asyncResponse, URI.create(remoteUri));
+    }
 }

gateway-ha/src/test/java/io/trino/gateway/ha/TestPutRequestHandler.java

@@ -0,0 +1,122 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.trino.gateway.ha;
+
+import okhttp3.MediaType;
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.RequestBody;
+import okhttp3.Response;
+import okhttp3.mockwebserver.Dispatcher;
+import okhttp3.mockwebserver.MockResponse;
+import okhttp3.mockwebserver.MockWebServer;
+import okhttp3.mockwebserver.RecordedRequest;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.TestInstance;
+import org.junit.jupiter.api.TestInstance.Lifecycle;
+
+import static com.google.common.net.HttpHeaders.CONTENT_TYPE;
+import static com.google.common.net.MediaType.JSON_UTF_8;
+import static org.assertj.core.api.Assertions.assertThat;
+
+@TestInstance(Lifecycle.PER_CLASS)
+public class TestPutRequestHandler
+{
+    private final OkHttpClient httpClient = new OkHttpClient();
+    private MockWebServer mockTrinoServer = new MockWebServer();
+
+    private final int routerPort = 21001 + (int) (Math.random() * 1000);
+    private final int customBackendPort = 21000 + (int) (Math.random() * 1000);
+
+    private static final String OK = "OK";
+    private static final int NOT_FOUND = 404;
+
+    private final String customPutEndpoint = "/v1/custom"; // this is enabled in test-config-template.yml
+    private final String healthCheckEndpoint = "/v1/info";
+
+    @BeforeAll
+    public void setup()
+            throws Exception
+    {
+        HaGatewayTestUtils.prepareMockBackend(mockTrinoServer, customBackendPort, "default custom response");
+        mockTrinoServer.setDispatcher(new Dispatcher() {
+            @Override
+            public MockResponse dispatch(RecordedRequest request)
+            {
+                if (request.getPath().equals(healthCheckEndpoint)) {
+                    return new MockResponse().setResponseCode(200)
+                            .setHeader(CONTENT_TYPE, JSON_UTF_8)
+                            .setBody("{\"starting\": false}");
+                }
+
+                if (request.getMethod().equals("PUT") && request.getPath().equals(customPutEndpoint)) {
+                    return new MockResponse().setResponseCode(200)
+                            .setHeader(CONTENT_TYPE, JSON_UTF_8)
+                            .setBody(OK);
+                }
+
+                return new MockResponse().setResponseCode(NOT_FOUND);
+            }
+        });
+
+        // seed database
+        HaGatewayTestUtils.TestConfig testConfig =
+                HaGatewayTestUtils.buildGatewayConfigAndSeedDb(routerPort, "test-config-template.yml");
+
+        // Start Gateway
+        String[] args = {testConfig.configFilePath()};
+        HaGatewayLauncher.main(args);
+
+        // Set up backend
+        HaGatewayTestUtils.setUpBackend(
+                "custom", "http://localhost:" + customBackendPort, "externalUrl", true, "adhoc", routerPort);
+    }
+
+    @AfterAll
+    public void cleanup()
+            throws Exception
+    {
+        if (mockTrinoServer != null) {
+            mockTrinoServer.shutdown();
+        }
+    }
+
+    @Test
+    public void testPutRequestHandler()
+            throws Exception
+    {
+        RequestBody requestBody =
+                RequestBody.create(MediaType.parse("application/json; charset=utf-8"), "SELECT 1");
+        Request putRequest =
+                new Request.Builder()
+                        .url("http://localhost:" + routerPort + customPutEndpoint)
+                        .put(requestBody)
+                        .build();
+
+        try (Response response = httpClient.newCall(putRequest).execute()) {
+            assertThat(response.body().string()).isEqualTo(OK);
+        }
+
+        Request postRequest =
+                new Request.Builder()
+                        .url("http://localhost:" + routerPort + customPutEndpoint)
+                        .post(requestBody)
+                        .build();
+        try (Response response = httpClient.newCall(postRequest).execute()) {
+            assertThat(response.code()).isEqualTo(NOT_FOUND);
+        }
+    }
+}