/**
* 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.flume.interceptor;
import java.net.InetAddress;
import com.google.common.base.Charsets;
import org.apache.flume.Context;
import org.apache.flume.Event;
import org.apache.flume.event.EventBuilder;
import org.apache.flume.interceptor.HostInterceptor.Constants;
import org.junit.Assert;
import org.junit.Test;
public class TestHostInterceptor {
/**
* Ensure that the "host" header gets set (to something)
*/
@Test
public void testBasic() throws Exception {
Interceptor.Builder builder = InterceptorBuilderFactory.newInstance(
InterceptorType.HOST.toString());
Interceptor interceptor = builder.build();
Event eventBeforeIntercept = EventBuilder.withBody("test event",
Charsets.UTF_8);
Assert.assertNull(eventBeforeIntercept.getHeaders().get(Constants.HOST));
Event eventAfterIntercept = interceptor.intercept(eventBeforeIntercept);
String actualHost = eventAfterIntercept.getHeaders().get(Constants.HOST);
Assert.assertNotNull(actualHost);
}
@Test
public void testCustomHeader() throws Exception {
Interceptor.Builder builder = InterceptorBuilderFactory.newInstance(
InterceptorType.HOST.toString());
Context ctx = new Context();
ctx.put("preserveExisting", "false");
ctx.put("hostHeader", "hostname");
builder.configure(ctx);
Interceptor interceptor = builder.build();
Event eventBeforeIntercept = EventBuilder.withBody("test event",
Charsets.UTF_8);
Assert.assertNull(eventBeforeIntercept.getHeaders().get("hostname"));
Event eventAfterIntercept = interceptor.intercept(eventBeforeIntercept);
String actualHost = eventAfterIntercept.getHeaders().get("hostname");
Assert.assertNotNull(actualHost);
Assert.assertEquals(InetAddress.getLocalHost().getHostAddress(),
actualHost);
}
/**
* Ensure host is NOT overwritten when preserveExisting=true.
*/
@Test
public void testPreserve() throws Exception {
Context ctx = new Context();
ctx.put("preserveExisting", "true");
Interceptor.Builder builder = InterceptorBuilderFactory.newInstance(
InterceptorType.HOST.toString());
builder.configure(ctx);
Interceptor interceptor = builder.build();
final String ORIGINAL_HOST = "originalhost";
Event eventBeforeIntercept = EventBuilder.withBody("test event",
Charsets.UTF_8);
eventBeforeIntercept.getHeaders().put(Constants.HOST, ORIGINAL_HOST);
Assert.assertEquals(ORIGINAL_HOST,
eventBeforeIntercept.getHeaders().get(Constants.HOST));
String expectedHost = ORIGINAL_HOST;
Event eventAfterIntercept = interceptor.intercept(eventBeforeIntercept);
String actualHost = eventAfterIntercept.getHeaders().get(Constants.HOST);
Assert.assertNotNull(actualHost);
Assert.assertEquals(expectedHost, actualHost);
}
/**
* Ensure host IS overwritten when preserveExisting=false.
*/
@Test
public void testClobber() throws Exception {
Context ctx = new Context();
ctx.put("preserveExisting", "false"); // default behavior
Interceptor.Builder builder = InterceptorBuilderFactory
.newInstance(InterceptorType.HOST.toString());
builder.configure(ctx);
Interceptor interceptor = builder.build();
final String ORIGINAL_HOST = "originalhost";
Event eventBeforeIntercept = EventBuilder.withBody("test event",
Charsets.UTF_8);
eventBeforeIntercept.getHeaders().put(Constants.HOST, ORIGINAL_HOST);
Assert.assertEquals(ORIGINAL_HOST, eventBeforeIntercept.getHeaders()
.get(Constants.HOST));
String expectedHost = InetAddress.getLocalHost().getHostAddress();
Event eventAfterIntercept = interceptor.intercept(eventBeforeIntercept);
String actualHost = eventAfterIntercept.getHeaders().get(Constants.HOST);
Assert.assertNotNull(actualHost);
Assert.assertEquals(expectedHost, actualHost);
}
/**
* Ensure host IP is used by default instead of host name.
*/
@Test
public void testUseIP() throws Exception {
Context ctx = new Context();
ctx.put("useIP", "true"); // default behavior
Interceptor.Builder builder = InterceptorBuilderFactory
.newInstance(InterceptorType.HOST.toString());
builder.configure(ctx);
Interceptor interceptor = builder.build();
final String ORIGINAL_HOST = "originalhost";
Event eventBeforeIntercept = EventBuilder.withBody("test event",
Charsets.UTF_8);
eventBeforeIntercept.getHeaders().put(Constants.HOST, ORIGINAL_HOST);
Assert.assertEquals(ORIGINAL_HOST, eventBeforeIntercept.getHeaders()
.get(Constants.HOST));
String expectedHost = InetAddress.getLocalHost().getHostAddress();
Event eventAfterIntercept = interceptor.intercept(eventBeforeIntercept);
String actualHost = eventAfterIntercept.getHeaders().get(Constants.HOST);
Assert.assertNotNull(actualHost);
Assert.assertEquals(expectedHost, actualHost);
}
/**
* Ensure host name can be used instead of host IP.
*/
@Test
public void testUseHostname() throws Exception {
Context ctx = new Context();
ctx.put("useIP", "false");
Interceptor.Builder builder = InterceptorBuilderFactory
.newInstance(InterceptorType.HOST.toString());
builder.configure(ctx);
Interceptor interceptor = builder.build();
final String ORIGINAL_HOST = "originalhost";
Event eventBeforeIntercept = EventBuilder.withBody("test event",
Charsets.UTF_8);
eventBeforeIntercept.getHeaders().put(Constants.HOST, ORIGINAL_HOST);
Assert.assertEquals(ORIGINAL_HOST, eventBeforeIntercept.getHeaders()
.get(Constants.HOST));
String expectedHost = InetAddress.getLocalHost().getCanonicalHostName();
Event eventAfterIntercept = interceptor.intercept(eventBeforeIntercept);
String actualHost = eventAfterIntercept.getHeaders().get(Constants.HOST);
Assert.assertNotNull(actualHost);
Assert.assertEquals(expectedHost, actualHost);
}
}