| /* |
| * 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.commons.io.IOUtils; |
| import org.apache.knox.gateway.filter.GatewayResponse; |
| import org.apache.http.client.HttpClient; |
| import org.apache.http.client.methods.HttpUriRequest; |
| |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| import java.util.Arrays; |
| import java.util.Enumeration; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| public abstract class AbstractGatewayDispatch implements Dispatch { |
| private static final Set<String> REQUEST_EXCLUDE_HEADERS = new HashSet<>(Arrays.asList( |
| "Host", "Authorization", "Content-Length", "Transfer-Encoding")); |
| |
| protected HttpClient client; |
| |
| @Override |
| public void init() { |
| } |
| |
| protected void writeResponse(HttpServletRequest request, HttpServletResponse response, InputStream stream) |
| throws IOException { |
| if (response instanceof GatewayResponse) { |
| ((GatewayResponse) response).streamResponse(stream); |
| } else { |
| try(OutputStream output = response.getOutputStream()) { |
| IOUtils.copy(stream, output); |
| } |
| } |
| } |
| |
| @Override |
| public synchronized HttpClient getHttpClient() { |
| return client; |
| } |
| |
| @Override |
| public synchronized void setHttpClient(HttpClient client) { |
| this.client = client; |
| } |
| |
| @Override |
| public URI getDispatchUrl(HttpServletRequest request) { |
| StringBuffer str = request.getRequestURL(); |
| String query = request.getQueryString(); |
| if ( query != null ) { |
| str.append('?'); |
| str.append(query); |
| } |
| return URI.create(str.toString()); |
| } |
| |
| @Override |
| public void doGet(URI url, HttpServletRequest request, HttpServletResponse response ) |
| throws IOException, URISyntaxException { |
| response.sendError( HttpServletResponse.SC_METHOD_NOT_ALLOWED ); |
| } |
| |
| @Override |
| public void doPost(URI url, HttpServletRequest request, HttpServletResponse response ) |
| throws IOException, URISyntaxException { |
| response.sendError( HttpServletResponse.SC_METHOD_NOT_ALLOWED ); |
| } |
| |
| @Override |
| public void doPut(URI url, HttpServletRequest request, HttpServletResponse response ) |
| throws IOException, URISyntaxException { |
| response.sendError( HttpServletResponse.SC_METHOD_NOT_ALLOWED ); |
| } |
| |
| @Override |
| public void doPatch(URI url, HttpServletRequest request, HttpServletResponse response ) |
| throws IOException, URISyntaxException { |
| response.sendError( HttpServletResponse.SC_METHOD_NOT_ALLOWED ); |
| } |
| |
| @Override |
| public void doDelete(URI url, HttpServletRequest request, HttpServletResponse response ) |
| throws IOException, URISyntaxException { |
| response.sendError( HttpServletResponse.SC_METHOD_NOT_ALLOWED ); |
| } |
| |
| @Override |
| public void doOptions(URI url, HttpServletRequest request, HttpServletResponse response ) |
| throws IOException, URISyntaxException { |
| response.sendError( HttpServletResponse.SC_METHOD_NOT_ALLOWED ); |
| } |
| |
| /** |
| * @since 0.14.0 |
| */ |
| @Override |
| public void doHead(URI url, HttpServletRequest request, HttpServletResponse response ) |
| throws IOException, URISyntaxException { |
| response.sendError( HttpServletResponse.SC_METHOD_NOT_ALLOWED ); |
| } |
| |
| public void copyRequestHeaderFields(HttpUriRequest outboundRequest, |
| HttpServletRequest inboundRequest) { |
| Enumeration<String> headerNames = inboundRequest.getHeaderNames(); |
| while( headerNames.hasMoreElements() ) { |
| String name = headerNames.nextElement(); |
| if ( !outboundRequest.containsHeader( name ) |
| && !getOutboundRequestExcludeHeaders().contains( name ) ) { |
| String value = inboundRequest.getHeader( name ); |
| outboundRequest.addHeader( name, value ); |
| } |
| } |
| } |
| |
| public Set<String> getOutboundRequestExcludeHeaders() { |
| return REQUEST_EXCLUDE_HEADERS; |
| } |
| |
| protected void encodeUnwiseCharacters(StringBuffer str) { |
| int pipe = str.indexOf("|"); |
| while (pipe > -1) { |
| str.replace(pipe, pipe+1, "%7C"); |
| pipe = str.indexOf("|", pipe+1); |
| } |
| int dq = str.indexOf("\""); |
| while (dq > -1) { |
| str.replace(dq, dq+1, "%22"); |
| dq = str.indexOf("\"", dq+1); |
| } |
| int lessThan = str.indexOf("<"); |
| while (lessThan > -1) { |
| str.replace(lessThan, lessThan+1, "%3C"); |
| lessThan = str.indexOf("<", lessThan+1); |
| } |
| int greaterThan = str.indexOf(">"); |
| while (greaterThan > -1) { |
| str.replace(greaterThan, greaterThan+1, "%3E"); |
| greaterThan = str.indexOf(">", greaterThan+1); |
| } |
| } |
| } |