| /** |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.ozone.s3; |
| |
| 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 javax.servlet.http.HttpServletRequestWrapper; |
| import java.io.IOException; |
| import java.util.Enumeration; |
| import java.util.NoSuchElementException; |
| |
| /** |
| * Filter to accept queries with empty string content-type (ruby sdk). |
| */ |
| public class EmptyContentTypeFilter implements Filter { |
| |
| @Override |
| public void init(FilterConfig filterConfig) throws ServletException { |
| |
| } |
| |
| @Override |
| public void doFilter( |
| ServletRequest request, ServletResponse response, FilterChain chain |
| ) throws IOException, ServletException { |
| HttpServletRequest httpRequest = (HttpServletRequest) request; |
| if ("".equals(httpRequest.getContentType())) { |
| chain.doFilter(new HttpServletRequestWrapper(httpRequest) { |
| @Override |
| public String getContentType() { |
| return null; |
| } |
| |
| @Override |
| public String getHeader(String name) { |
| if (name.equalsIgnoreCase("Content-Type")) { |
| return null; |
| } |
| return super.getHeader(name); |
| } |
| |
| @Override |
| public Enumeration<String> getHeaders(String name) { |
| if ("Content-Type".equalsIgnoreCase(name)) { |
| return null; |
| } |
| return super.getHeaders(name); |
| } |
| |
| @Override |
| public Enumeration<String> getHeaderNames() { |
| return new EnumerationWrapper(super.getHeaderNames()); |
| } |
| }, response); |
| } else { |
| chain.doFilter(request, response); |
| } |
| |
| } |
| |
| @Override |
| public void destroy() { |
| |
| } |
| |
| /** |
| * Enumeration Wrapper which removes Content-Type from the original |
| * enumeration. |
| */ |
| public static class EnumerationWrapper implements Enumeration<String> { |
| |
| private final Enumeration<String> original; |
| |
| private String nextElement; |
| |
| public EnumerationWrapper(Enumeration<String> original) { |
| this.original = original; |
| step(); |
| } |
| |
| private void step() { |
| if (original.hasMoreElements()) { |
| nextElement = original.nextElement(); |
| } else { |
| nextElement = null; |
| } |
| if ("Content-Type".equalsIgnoreCase(nextElement)) { |
| if (original.hasMoreElements()) { |
| nextElement = original.nextElement(); |
| } else { |
| nextElement = null; |
| } |
| } |
| } |
| |
| @Override |
| public boolean hasMoreElements() { |
| return nextElement != null; |
| } |
| |
| @Override |
| public String nextElement() { |
| if (nextElement == null) { |
| throw new NoSuchElementException(); |
| } |
| String returnValue = nextElement; |
| step(); |
| return returnValue; |
| } |
| } |
| } |