| /** |
| * 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.http; |
| |
| import java.io.BufferedReader; |
| import java.io.IOException; |
| import java.io.InputStreamReader; |
| import java.net.URL; |
| import java.net.URLConnection; |
| import java.util.Random; |
| |
| import javax.servlet.Filter; |
| import javax.servlet.FilterChain; |
| import javax.servlet.FilterConfig; |
| import javax.servlet.ServletException; |
| import javax.servlet.ServletRequest; |
| import javax.servlet.ServletResponse; |
| import javax.servlet.http.HttpServletRequest; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.net.NetUtils; |
| import org.apache.hadoop.test.GenericTestUtils; |
| import org.junit.Test; |
| |
| public class TestServletFilter extends HttpServerFunctionalTest { |
| static final Log LOG = LogFactory.getLog(HttpServer2.class); |
| static volatile String uri = null; |
| |
| /** A very simple filter which record the uri filtered. */ |
| static public class SimpleFilter implements Filter { |
| private FilterConfig filterConfig = null; |
| |
| @Override |
| public void init(FilterConfig filterConfig) throws ServletException { |
| this.filterConfig = filterConfig; |
| } |
| |
| @Override |
| public void destroy() { |
| this.filterConfig = null; |
| } |
| |
| @Override |
| public void doFilter(ServletRequest request, ServletResponse response, |
| FilterChain chain) throws IOException, ServletException { |
| if (filterConfig == null) |
| return; |
| |
| uri = ((HttpServletRequest)request).getRequestURI(); |
| LOG.info("filtering " + uri); |
| chain.doFilter(request, response); |
| } |
| |
| /** Configuration for the filter */ |
| static public class Initializer extends FilterInitializer { |
| public Initializer() {} |
| |
| @Override |
| public void initFilter(FilterContainer container, Configuration conf) { |
| container.addFilter("simple", SimpleFilter.class.getName(), null); |
| } |
| } |
| } |
| |
| |
| /** access a url, ignoring some IOException such as the page does not exist */ |
| static void access(String urlstring) throws IOException { |
| LOG.warn("access " + urlstring); |
| URL url = new URL(urlstring); |
| URLConnection connection = url.openConnection(); |
| connection.connect(); |
| |
| try { |
| BufferedReader in = new BufferedReader(new InputStreamReader( |
| connection.getInputStream())); |
| try { |
| for(; in.readLine() != null; ); |
| } finally { |
| in.close(); |
| } |
| } catch(IOException ioe) { |
| LOG.warn("urlstring=" + urlstring, ioe); |
| } |
| } |
| |
| @Test |
| public void testServletFilter() throws Exception { |
| Configuration conf = new Configuration(); |
| |
| //start a http server with CountingFilter |
| conf.set(HttpServer2.FILTER_INITIALIZER_PROPERTY, |
| SimpleFilter.Initializer.class.getName()); |
| HttpServer2 http = createTestServer(conf); |
| http.start(); |
| |
| final String fsckURL = "/fsck"; |
| final String stacksURL = "/stacks"; |
| final String ajspURL = "/a.jsp"; |
| final String logURL = "/logs/a.log"; |
| final String hadooplogoURL = "/static/hadoop-logo.jpg"; |
| |
| final String[] urls = {fsckURL, stacksURL, ajspURL, logURL, hadooplogoURL}; |
| final Random ran = new Random(); |
| final int[] sequence = new int[50]; |
| |
| //generate a random sequence and update counts |
| for(int i = 0; i < sequence.length; i++) { |
| sequence[i] = ran.nextInt(urls.length); |
| } |
| |
| //access the urls as the sequence |
| final String prefix = "http://" |
| + NetUtils.getHostPortString(http.getConnectorAddress(0)); |
| try { |
| for(int i = 0; i < sequence.length; i++) { |
| access(prefix + urls[sequence[i]]); |
| |
| //make sure everything except fsck get filtered |
| if (sequence[i] == 0) { |
| assertEquals(null, uri); |
| } else { |
| assertEquals(urls[sequence[i]], uri); |
| uri = null; |
| } |
| } |
| } finally { |
| http.stop(); |
| } |
| } |
| |
| static public class ErrorFilter extends SimpleFilter { |
| @Override |
| public void init(FilterConfig arg0) throws ServletException { |
| throw new ServletException("Throwing the exception from Filter init"); |
| } |
| |
| /** Configuration for the filter */ |
| static public class Initializer extends FilterInitializer { |
| public Initializer() { |
| } |
| |
| @Override |
| public void initFilter(FilterContainer container, Configuration conf) { |
| container.addFilter("simple", ErrorFilter.class.getName(), null); |
| } |
| } |
| } |
| |
| @Test |
| public void testServletFilterWhenInitThrowsException() throws Exception { |
| Configuration conf = new Configuration(); |
| // start a http server with ErrorFilter |
| conf.set(HttpServer2.FILTER_INITIALIZER_PROPERTY, |
| ErrorFilter.Initializer.class.getName()); |
| HttpServer2 http = createTestServer(conf); |
| try { |
| http.start(); |
| fail("expecting exception"); |
| } catch (IOException e) { |
| assertTrue( e.getMessage().contains("Problem in starting http server. Server handlers failed")); |
| } |
| } |
| |
| /** |
| * Similar to the above test case, except that it uses a different API to add the |
| * filter. Regression test for HADOOP-8786. |
| */ |
| @Test |
| public void testContextSpecificServletFilterWhenInitThrowsException() |
| throws Exception { |
| Configuration conf = new Configuration(); |
| HttpServer2 http = createTestServer(conf); |
| HttpServer2.defineFilter(http.webAppContext, |
| "ErrorFilter", ErrorFilter.class.getName(), |
| null, null); |
| try { |
| http.start(); |
| fail("expecting exception"); |
| } catch (IOException e) { |
| GenericTestUtils.assertExceptionContains("Unable to initialize WebAppContext", e); |
| } |
| } |
| |
| } |