| /* |
| * 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.knox.gateway.util; |
| |
| import java.io.UnsupportedEncodingException; |
| import java.net.URLDecoder; |
| import java.nio.charset.StandardCharsets; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.StringTokenizer; |
| |
| public class HttpUtils { |
| |
| public static Map<String, List<String>> splitQuery(String queryString) |
| throws UnsupportedEncodingException { |
| final Map<String, List<String>> queryPairs = new HashMap<>(); |
| if (queryString == null || queryString.trim().isEmpty()) { |
| return queryPairs; |
| } |
| final String[] pairs = queryString.split("&"); |
| for (String pair : pairs) { |
| final int idx = pair.indexOf('='); |
| final String key = idx > 0 ? URLDecoder.decode(pair.substring(0, idx), StandardCharsets.UTF_8.name()) : pair; |
| if (!queryPairs.containsKey(key)) { |
| queryPairs.put(key, new ArrayList<String>()); |
| } |
| final String value = idx > 0 && pair.length() > idx + 1 |
| ? URLDecoder.decode(pair.substring(idx + 1), StandardCharsets.UTF_8.name()) : ""; |
| queryPairs.get(key).add(value); |
| } |
| return queryPairs; |
| } |
| |
| public static Map<String,String[]> parseQueryString( String queryString ) { |
| Map<String,String[]> map = new HashMap<>(); |
| if( queryString != null && !queryString.isEmpty() ) { |
| StringTokenizer parser = new StringTokenizer( queryString, "&?;=", true ); |
| String name = null; |
| String value = null; |
| while( parser.hasMoreTokens() ) { |
| String token = parser.nextToken(); |
| String ttoken = token.trim(); |
| if( ttoken.length() == 1 ) { |
| char c = ttoken.charAt( 0 ); |
| switch( c ) { |
| case '&': |
| case '?': |
| case ';': |
| addQueryStringParam( map, name, value ); |
| name = null; |
| value = null; |
| continue; |
| case '=': |
| if( name == null ) { |
| name = ""; |
| value = ""; |
| } else if( name.isEmpty() ) { |
| addQueryStringParam( map, name, value ); |
| name = ""; |
| value = ""; |
| } else { |
| value = ""; |
| } |
| continue; |
| } |
| } |
| if( name == null ) { |
| name = token; |
| } else { |
| value = token; |
| } |
| } // while |
| if( name != null ) { |
| addQueryStringParam( map, name, value ); |
| } |
| } |
| return map; |
| } |
| |
| private static final String urlDecodeUtf8( String s ) { |
| if( s != null ) { |
| try { |
| s = URLDecoder.decode( s, StandardCharsets.UTF_8.name() ); |
| } catch( UnsupportedEncodingException e ) { |
| // Ignore it. |
| } |
| } |
| return s; |
| } |
| |
| static final void addQueryStringParam( final Map<String,String[]> map, String name, String value ) { |
| name = urlDecodeUtf8( name ); |
| value = urlDecodeUtf8( value ); |
| String[] values = map.get( name ); |
| if( values == null ) { |
| values = new String[]{ value }; |
| } else { |
| values = Arrays.copyOf( values, values.length + 1 ); |
| values[ values.length-1 ] = value; |
| } |
| map.put( name, values ); |
| } |
| |
| } |