content: /**
   * 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 org.apache.aurora.scheduler.http;
  
  import java.io.IOException;
  import java.net.URL;
  import java.nio.charset.StandardCharsets;
  import java.util.Optional;
  
  import javax.ws.rs.core.HttpHeaders;
  import javax.ws.rs.core.MediaType;
  
  import com.google.common.io.Resources;
  import com.sun.jersey.api.client.ClientResponse;
  import com.sun.jersey.api.client.ClientResponse.Status;
  
  import org.junit.Test;
  
  import static org.apache.aurora.gen.apiConstants.BYPASS_LEADER_REDIRECT_HEADER_NAME;
  import static org.junit.Assert.assertEquals;
  
  public class ServletFilterTest extends AbstractJettyTest {
  
    protected ClientResponse get(String path) {
      return getRequestBuilder(path)
          .header(HttpHeaders.ACCEPT_ENCODING, "gzip")
          .get(ClientResponse.class);
    }
  
    protected ClientResponse post(String path, String body) {
      return getRequestBuilder(path)
          .header(HttpHeaders.ACCEPT_ENCODING, "gzip")
          .type(MediaType.TEXT_PLAIN_TYPE)
          .post(ClientResponse.class, body);
    }
  
    private void assertContentEncoding(ClientResponse response, Optional<String> encoding) {
      assertEquals(
          encoding.orElse(null),
          response.getHeaders().getFirst(HttpHeaders.CONTENT_ENCODING));
    }
  
    private void assertGzipEncodedGet(String path) {
      assertContentEncoding(get(path), Optional.of("gzip"));
    }
  
    @Test
    public void testGzipEncoding() throws Exception {
      replayAndStart();
  
      assertGzipEncodedGet("/");
      assertGzipEncodedGet("/scheduler");
      assertGzipEncodedGet("/scheduler/");
      assertGzipEncodedGet("/scheduler/role");
      assertGzipEncodedGet("/scheduler/role/");
      assertGzipEncodedGet("/scheduler/role/env/");
      assertGzipEncodedGet("/scheduler/role/env/job");
      assertGzipEncodedGet("/scheduler/role/env/job/");
  
      assertGzipEncodedGet("/updates");
      assertGzipEncodedGet("/updates/");
    }
  
    private void assertResponseStatus(
        String path,
        Status expectedStatus,
        Optional<URL> responseResource) throws IOException {
  
      ClientResponse response = get(path);
      assertEquals(expectedStatus.getStatusCode(), response.getStatus());
  
      if (responseResource.isPresent()) {
        assertEquals(
            Resources.toString(responseResource.get(), StandardCharsets.UTF_8),
            response.getEntity(String.class));
      }
    }
  
    private void leaderRedirectSmokeTest(Status expectedStatus, Optional<URL> responseResource)
        throws IOException {
  
      assertResponseStatus("/scheduler", expectedStatus, responseResource);
      assertResponseStatus("/scheduler/", expectedStatus, responseResource);
      assertResponseStatus("/scheduler/role", expectedStatus, responseResource);
      assertResponseStatus("/scheduler/role/env", expectedStatus, responseResource);
      assertResponseStatus("/scheduler/role/env/job", expectedStatus, responseResource);
  
      assertResponseStatus("/updates", expectedStatus, responseResource);
      assertResponseStatus("/updates/", expectedStatus, responseResource);
    }
  
    @Test
    public void testLeaderRedirect() throws Exception {
      replayAndStart();
  
      assertResponseStatus("/", Status.OK, Optional.empty());
  
      // If there's no leader, we should send service unavailable and an error page.
      unsetLeadingSchduler();
      leaderRedirectSmokeTest(
          Status.SERVICE_UNAVAILABLE,
          Optional.of(
              Resources.getResource(
                  LeaderRedirectFilter.class,
                  LeaderRedirectFilter.NO_LEADER_PAGE)));
  
      // This process is leading
      setLeadingScheduler(httpServer.getHost(), httpServer.getPort());
      leaderRedirectSmokeTest(Status.OK, Optional.empty());
  
      setLeadingScheduler("otherHost", 1234);
      leaderRedirectSmokeTest(Status.TEMPORARY_REDIRECT, Optional.empty());
      assertResponseStatus("/", Status.OK, Optional.empty());
    }
  
    @Test
    public void testHeaderOverridesLeaderRedirect() throws Exception {
      replayAndStart();
  
      unsetLeadingSchduler();
  
      ClientResponse response = getRequestBuilder("/scheduler")
          .header(BYPASS_LEADER_REDIRECT_HEADER_NAME, "true")
          .get(ClientResponse.class);
  
      assertEquals(Status.OK.getStatusCode(), response.getStatus());
    }
  }
  