[jira] [Work logged] (KNOX-2253) Add support to handle Livy server redirects

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/KNOX-2253?focusedWorklogId=405860&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-405860 ]

ASF GitHub Bot logged work on KNOX-2253:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 19/Mar/20 00:22
            Start Date: 19/Mar/20 00:22
    Worklog Time Spent: 10m 
      Work Description: RogPodge commented on pull request #275: KNOX-2253 Add support to handle Livy server redirects
URL: https://github.com/apache/knox/pull/275#discussion_r394717991
 
 

 ##########
 File path: gateway-service-livy/src/main/java/org/apache/knox/gateway/livy/LivyHaDispatch.java
 ##########
 @@ -0,0 +1,156 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with this
+ * work for additional information regarding copyright ownership. The ASF
+ * licenses this file to you 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 org.apache.knox.gateway.livy;
+
+import org.apache.http.HttpResponse;
+import org.apache.http.client.methods.HttpRequestBase;
+import org.apache.http.client.methods.HttpUriRequest;
+import org.apache.http.entity.BufferedHttpEntity;
+import org.apache.knox.gateway.ha.dispatch.DefaultHaDispatch;
+import org.apache.knox.gateway.filter.AbstractGatewayFilter;
+import org.apache.knox.gateway.i18n.messages.MessagesFactory;
+import org.apache.knox.gateway.livy.i18n.RMMessages;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.net.URI;
+import java.nio.charset.StandardCharsets;
+import java.util.concurrent.atomic.AtomicInteger;
+
+public class  LivyHaDispatch extends DefaultHaDispatch {
+    private static final String FAILOVER_COUNTER_ATTRIBUTE = "dispatch.ha.failover.counter";
+    private static final String LOCATION = "Location";
+    private static final RMMessages LOG = MessagesFactory.get(RMMessages.class);
 
 Review comment:
   Changed
 
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Issue Time Tracking
-------------------

    Worklog Id:     (was: 405860)
    Time Spent: 1.5h  (was: 1h 20m)

> Add support to handle Livy server redirects
> -------------------------------------------
>
>                 Key: KNOX-2253
>                 URL: https://issues.apache.org/jira/browse/KNOX-2253
>             Project: Apache Knox
>          Issue Type: Improvement
>            Reporter: Roger Liu
>            Assignee: Roger Liu
>            Priority: Major
>             Fix For: 1.5.0
>
>          Time Spent: 1.5h
>  Remaining Estimate: 0h
>
> Currently knox gateway does not seemlessly handle Livy redirect responses like it does with Yarn resource manager. We need a patch to knox gateway to handle these redirect responses on server side



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