| /* |
| * 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.knox.gateway.dispatch; |
| |
| import org.apache.knox.gateway.config.Configure; |
| import org.apache.knox.gateway.config.Default; |
| import org.apache.knox.gateway.util.StringUtils; |
| |
| import javax.servlet.http.HttpServletRequest; |
| import java.io.UnsupportedEncodingException; |
| import java.net.URI; |
| import java.net.URLDecoder; |
| import java.nio.charset.StandardCharsets; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Optional; |
| import java.util.Set; |
| import java.util.stream.Collectors; |
| |
| /** |
| * Extends DefaultDispatch to: |
| * make request/response exclude headers configurable |
| * make url encoding configurable |
| */ |
| public class ConfigurableDispatch extends DefaultDispatch { |
| private Set<String> requestExcludeHeaders = super.getOutboundRequestExcludeHeaders(); |
| private Set<String> responseExcludeHeaders = super.getOutboundResponseExcludeHeaders(); |
| private Set<String> responseExcludeSetCookieHeaderDirectives = super.getOutboundResponseExcludedSetCookieHeaderDirectives(); |
| private Boolean removeUrlEncoding = false; |
| |
| private Set<String> convertCommaDelimitedHeadersToSet(String headers) { |
| return headers == null ? Collections.emptySet(): new HashSet<>(Arrays.asList(headers.split(","))); |
| } |
| |
| @Configure |
| protected void setRequestExcludeHeaders(@Default(" ") String headers) { |
| if(!" ".equals(headers)) { |
| this.requestExcludeHeaders = convertCommaDelimitedHeadersToSet(headers); |
| } |
| } |
| |
| @Configure |
| protected void setResponseExcludeHeaders(@Default(" ") String headers) { |
| if (!" ".equals(headers)) { |
| final Set<String> headerSet = convertCommaDelimitedHeadersToSet(headers); |
| populateSetCookieHeaderDirectiveExlusions(headerSet); |
| populateHttpHeaderExlusionsOtherThanSetCookie(headerSet); |
| } |
| } |
| |
| private void populateSetCookieHeaderDirectiveExlusions(final Set<String> headerSet) { |
| final Optional<String> setCookieHeader = headerSet.stream().filter(s -> StringUtils.startsWithIgnoreCase(s, SET_COOKIE)).findFirst(); |
| if (setCookieHeader.isPresent()) { |
| final String[] setCookieHeaderParts = setCookieHeader.get().split(":"); |
| responseExcludeSetCookieHeaderDirectives = setCookieHeaderParts.length > 1 |
| ? new HashSet<>(Arrays.asList(setCookieHeaderParts[1].split(";"))).stream().map(e -> e.trim()).collect(Collectors.toSet()) |
| : Collections.emptySet(); |
| } else { |
| responseExcludeSetCookieHeaderDirectives = Collections.emptySet(); |
| } |
| } |
| |
| private void populateHttpHeaderExlusionsOtherThanSetCookie(final Set<String> headerSet) { |
| final Set<String> excludedHeadersOthenThanSetCookie = headerSet.stream().filter(s -> !StringUtils.startsWithIgnoreCase(s, SET_COOKIE)).collect(Collectors.toSet()); |
| if (!excludedHeadersOthenThanSetCookie.isEmpty()) { |
| this.responseExcludeHeaders = excludedHeadersOthenThanSetCookie; |
| } |
| } |
| |
| |
| @Configure |
| protected void setRemoveUrlEncoding(@Default("false") String removeUrlEncoding) { |
| this.removeUrlEncoding = Boolean.parseBoolean(removeUrlEncoding); |
| } |
| |
| @Override |
| public Set<String> getOutboundResponseExcludeHeaders() { |
| return responseExcludeHeaders == null ? Collections.emptySet() : responseExcludeHeaders; |
| } |
| |
| @Override |
| public Set<String> getOutboundResponseExcludedSetCookieHeaderDirectives() { |
| return responseExcludeSetCookieHeaderDirectives == null ? Collections.emptySet() : responseExcludeSetCookieHeaderDirectives; |
| } |
| |
| @Override |
| public Set<String> getOutboundRequestExcludeHeaders() { |
| return requestExcludeHeaders == null ? Collections.emptySet() : requestExcludeHeaders; |
| } |
| |
| public boolean getRemoveUrlEncoding() { |
| return removeUrlEncoding; |
| } |
| |
| @Override |
| public URI getDispatchUrl(HttpServletRequest request) { |
| if (getRemoveUrlEncoding()) { |
| String base = request.getRequestURI(); |
| StringBuffer str = new StringBuffer(); |
| str.append(base); |
| String query = request.getQueryString(); |
| if (query != null) { |
| try { |
| query = URLDecoder.decode(query, StandardCharsets.UTF_8.name()); |
| } catch (UnsupportedEncodingException e) { |
| // log |
| } |
| str.append('?'); |
| str.append(query); |
| } |
| encodeUnwiseCharacters(str); |
| return URI.create(str.toString()); |
| } |
| |
| return super.getDispatchUrl(request); |
| } |
| } |