| /** |
| * 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.gateway.identityasserter.common.filter; |
| |
| import org.apache.commons.io.IOUtils; |
| import org.apache.hadoop.gateway.SpiGatewayMessages; |
| import org.apache.hadoop.gateway.config.GatewayConfig; |
| import org.apache.hadoop.gateway.i18n.messages.MessagesFactory; |
| |
| import javax.servlet.ServletInputStream; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletRequestWrapper; |
| import java.io.ByteArrayInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.UnsupportedEncodingException; |
| import java.net.URLEncoder; |
| import java.nio.charset.Charset; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Enumeration; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| public class IdentityAsserterHttpServletRequestWrapper extends HttpServletRequestWrapper { |
| |
| private static SpiGatewayMessages log = MessagesFactory.get( SpiGatewayMessages.class ); |
| |
| private static final String PRINCIPAL_PARAM = "user.name"; |
| private static final String DOAS_PRINCIPAL_PARAM = "doAs"; |
| |
| String username = null; |
| |
| public IdentityAsserterHttpServletRequestWrapper( HttpServletRequest request, String principal ) { |
| super(request); |
| username = principal; |
| } |
| |
| @Override |
| public String getParameter(String name) { |
| if (name.equals(PRINCIPAL_PARAM)) { |
| return username; |
| } |
| return super.getParameter(name); |
| } |
| |
| @SuppressWarnings("rawtypes") |
| @Override |
| public Map getParameterMap() { |
| return getParams(); |
| } |
| |
| @SuppressWarnings({ "unchecked", "rawtypes" }) |
| @Override |
| public Enumeration getParameterNames() { |
| Map<String, String[]> params = getParams(); |
| if (params == null) { |
| params = new HashMap<String, String[]>(); |
| } |
| Enumeration<String> e = Collections.enumeration((Collection<String>) params.keySet()); |
| |
| return e; |
| } |
| |
| @Override |
| public String[] getParameterValues(String name) { |
| Map<String, String[]> params = getParams(); |
| if (params == null) { |
| params = new HashMap<String, String[]>(); |
| } |
| |
| return params.get(name); |
| } |
| |
| private Map<String, String[]> getParams( String qString ) { |
| Map<String, String[]> params = null; |
| if (getMethod().equals("GET")) { |
| if (qString != null && qString.length() > 0) { |
| params = parseQueryString(qString); |
| } |
| else { |
| params = new HashMap<String, String[]>(); |
| } |
| } |
| else { |
| if (qString == null || qString.length() == 0) { |
| return null; |
| } |
| else { |
| params = parseQueryString(qString); |
| } |
| } |
| return params; |
| } |
| |
| private Map<String, String[]> getParams() { |
| return getParams( super.getQueryString() ); |
| } |
| |
| @Override |
| public String getQueryString() { |
| String q = null; |
| Map<String, String[]> params = getParams(); |
| |
| if (params == null) { |
| params = new HashMap<String, String[]>(); |
| } |
| |
| ArrayList<String> al = new ArrayList<String>(); |
| al.add(username); |
| String[] a = { "" }; |
| |
| if ("true".equals(System.getProperty(GatewayConfig.HADOOP_KERBEROS_SECURED))) { |
| params.put(DOAS_PRINCIPAL_PARAM, al.toArray(a)); |
| params.remove(PRINCIPAL_PARAM); |
| } else { |
| params.put(PRINCIPAL_PARAM, al.toArray(a)); |
| } |
| |
| String encoding = getCharacterEncoding(); |
| if (encoding == null) { |
| encoding = Charset.defaultCharset().name(); |
| } |
| q = urlEncode(params, encoding); |
| return q; |
| } |
| |
| @Override |
| public int getContentLength() { |
| int len; |
| String contentType = getContentType(); |
| // If the content type is a form we might rewrite the body so default it to -1. |
| if( contentType != null && contentType.startsWith( "application/x-www-form-urlencoded" ) ) { |
| len = -1; |
| } else { |
| len = super.getContentLength(); |
| } |
| return len; |
| } |
| |
| @Override |
| public ServletInputStream getInputStream() throws java.io.IOException { |
| String contentType = getContentType(); |
| if( contentType != null && contentType.startsWith( "application/x-www-form-urlencoded" ) ) { |
| String encoding = getCharacterEncoding(); |
| if( encoding == null ) { |
| encoding = Charset.defaultCharset().name(); |
| } |
| String body = IOUtils.toString( super.getInputStream(), encoding ); |
| Map<String, String[]> params = getParams( body ); |
| if (params == null) { |
| params = new HashMap<String, String[]>(); |
| } |
| body = urlEncode( params, encoding ); |
| // ASCII is OK here because the urlEncode about should have already escaped |
| return new ServletInputStreamWrapper( new ByteArrayInputStream( body.getBytes( "US-ASCII" ) ) ); |
| } else { |
| return super.getInputStream(); |
| } |
| } |
| |
| static String urlEncode( String string, String encoding ) { |
| try { |
| return URLEncoder.encode( string, encoding ); |
| } catch (UnsupportedEncodingException e) { |
| throw new UnsupportedOperationException(e); |
| } |
| } |
| |
| public static String urlEncode( Map<String, String[]> map, String encoding ) { |
| StringBuilder sb = new StringBuilder(); |
| for( Map.Entry<String,String[]> entry : map.entrySet() ) { |
| String name = entry.getKey(); |
| if( name != null && name.length() > 0 ) { |
| String[] values = entry.getValue(); |
| if( values == null || values.length == 0 ) { |
| sb.append( entry.getKey() ); |
| } else { |
| for( int i = 0; i < values.length; i++ ) { |
| String value = values[ i ]; |
| if( value != null ) { |
| if( sb.length() > 0 ) { |
| sb.append( "&" ); |
| } |
| try { |
| sb.append( urlEncode( name, encoding ) ); |
| sb.append( "=" ); |
| sb.append( urlEncode( value, encoding ) ); |
| } catch( IllegalArgumentException e ) { |
| log.skippingUnencodableParameter( name, value, encoding, e ); |
| } |
| } |
| } |
| } |
| } |
| } |
| return sb.toString(); |
| } |
| |
| @SuppressWarnings({ "deprecation", "unchecked" }) |
| private static Map<String,String[]> parseQueryString( String queryString ) { |
| return javax.servlet.http.HttpUtils.parseQueryString( queryString ); |
| } |
| |
| private class ServletInputStreamWrapper extends ServletInputStream { |
| |
| private InputStream stream; |
| |
| private ServletInputStreamWrapper( InputStream stream ) { |
| this.stream = stream; |
| } |
| |
| @Override |
| public int read() throws IOException { |
| return stream.read(); |
| } |
| |
| } |
| |
| } |