| /** |
| * 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.hdfs.web; |
| |
| import java.net.URI; |
| import java.util.List; |
| import java.util.Map; |
| |
| import javax.ws.rs.core.MultivaluedMap; |
| import javax.ws.rs.core.UriBuilder; |
| |
| import com.sun.jersey.spi.container.ContainerRequest; |
| import com.sun.jersey.spi.container.ContainerRequestFilter; |
| import com.sun.jersey.spi.container.ContainerResponseFilter; |
| import com.sun.jersey.spi.container.ResourceFilter; |
| import org.apache.hadoop.util.StringUtils; |
| |
| /** |
| * A filter to change parameter names to lower cases |
| * so that parameter names are considered as case insensitive. |
| */ |
| public class ParamFilter implements ResourceFilter { |
| private static final ContainerRequestFilter LOWER_CASE |
| = new ContainerRequestFilter() { |
| @Override |
| public ContainerRequest filter(final ContainerRequest request) { |
| final MultivaluedMap<String, String> parameters = request.getQueryParameters(); |
| if (containsUpperCase(parameters.keySet())) { |
| //rebuild URI |
| final URI lower = rebuildQuery(request.getRequestUri(), parameters); |
| request.setUris(request.getBaseUri(), lower); |
| } |
| return request; |
| } |
| }; |
| |
| @Override |
| public ContainerRequestFilter getRequestFilter() { |
| return LOWER_CASE; |
| } |
| |
| @Override |
| public ContainerResponseFilter getResponseFilter() { |
| return null; |
| } |
| |
| /** Do the strings contain upper case letters? */ |
| static boolean containsUpperCase(final Iterable<String> strings) { |
| for(String s : strings) { |
| for(int i = 0; i < s.length(); i++) { |
| if (Character.isUpperCase(s.charAt(i))) { |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| /** Rebuild the URI query with lower case parameter names. */ |
| private static URI rebuildQuery(final URI uri, |
| final MultivaluedMap<String, String> parameters) { |
| UriBuilder b = UriBuilder.fromUri(uri).replaceQuery(""); |
| for(Map.Entry<String, List<String>> e : parameters.entrySet()) { |
| final String key = StringUtils.toLowerCase(e.getKey()); |
| for(String v : e.getValue()) { |
| b = b.queryParam(key, v); |
| } |
| } |
| return b.build(); |
| } |
| } |