/**
    *
    * 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.hadoop.hbase;
  
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertTrue;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.net.URL;
  
  import org.apache.commons.io.IOUtils;
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.apache.hadoop.hbase.testclassification.MediumTests;
  import org.apache.hadoop.hbase.util.Bytes;
  import org.junit.AfterClass;
  import org.junit.BeforeClass;
  import org.junit.Test;
  import org.junit.experimental.categories.Category;
  
  /**
   * Testing, info servers are disabled.  This test enables then and checks that
   * they serve pages.
   */
  @Category(MediumTests.class)
  public class TestInfoServers {
    private static final Log LOG = LogFactory.getLog(TestInfoServers.class);
    private final static HBaseTestingUtility UTIL = new HBaseTestingUtility();
  
    @BeforeClass
    public static void beforeClass() throws Exception {
      // The info servers do not run in tests by default.
      // Set them to ephemeral ports so they will start
      UTIL.getConfiguration().setInt(HConstants.MASTER_INFO_PORT, 0);
      UTIL.getConfiguration().setInt(HConstants.REGIONSERVER_INFO_PORT, 0);
  
      //We need to make sure that the server can be started as read only.
      UTIL.getConfiguration().setBoolean("hbase.master.ui.readonly", true);
      UTIL.startMiniCluster();
      if (!UTIL.getHBaseCluster().waitForActiveAndReadyMaster(30000)) {
        throw new RuntimeException("Active master not ready");
      }
    }
  
    @AfterClass
    public static void afterClass() throws Exception {
      UTIL.shutdownMiniCluster();
    }
  
    /**
     * Ensure when we go to top level index pages that we get redirected to an info-server specific status
     * page.
     */
    @Test
    public void testInfoServersRedirect() throws Exception {
      int port = UTIL.getHBaseCluster().getMaster().getInfoServer().getPort();
      assertContainsContent(new URL("http://localhost:" + port + "/index.html"), "master-status");
      port = UTIL.getHBaseCluster().getRegionServerThreads().get(0).getRegionServer()
          .getInfoServer().getPort();
      assertContainsContent(new URL("http://localhost:" + port + "/index.html"), "rs-status");
    }
  
    /**
     * Test that the status pages in the minicluster load properly.
     *
     * This is somewhat a duplicate of TestRSStatusServlet and
     * TestMasterStatusServlet, but those are true unit tests
     * whereas this uses a cluster.
     */
    @Test
    public void testInfoServersStatusPages() throws Exception {
      int port = UTIL.getHBaseCluster().getMaster().getInfoServer().getPort();
      assertContainsContent(new URL("http://localhost:" + port + "/master-status"), "meta");
      port = UTIL.getHBaseCluster().getRegionServerThreads().get(0).getRegionServer()
          .getInfoServer().getPort();
      assertContainsContent(new URL("http://localhost:" + port + "/rs-status"), "meta");
    }
  
    @Test
    public void testMasterServerReadOnly() throws Exception {
      TableName tableName = TableName.valueOf("testMasterServerReadOnly");
      byte[] cf = Bytes.toBytes("d");
     UTIL.createTable(tableName, cf);
     UTIL.waitTableAvailable(tableName);
     int port = UTIL.getHBaseCluster().getMaster().getInfoServer().getPort();
     assertDoesNotContainContent(new URL("http://localhost:" + port + "/table.jsp?name=" + tableName
         + "&action=split&key="), "Table action request accepted");
     assertDoesNotContainContent(
       new URL("http://localhost:" + port + "/table.jsp?name=" + tableName), "Actions:");
   }
 
   private void assertContainsContent(final URL u, final String expected) throws IOException {
     LOG.info("Testing " + u.toString() + " has " + expected);
     String content = getUrlContent(u);
     assertTrue("expected=" + expected + ", content=" + content, content.contains(expected));
   }
 
   private void assertDoesNotContainContent(final URL u, final String expected) throws IOException {
     LOG.info("Testing " + u.toString() + " does not have " + expected);
     String content = getUrlContent(u);
     assertFalse("Does Not Contain =" + expected + ", content=" + content,
       content.contains(expected));
   }
 
   private String getUrlContent(URL u) throws IOException {
     java.net.URLConnection c = u.openConnection();
     c.setConnectTimeout(2000);
     c.setReadTimeout(2000);
     c.connect();
     try (InputStream in = c.getInputStream()) {
       return IOUtils.toString(in);
     }
   }
 }