| /* |
| * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.net.httpserver; |
| |
| import java.util.*; |
| |
| /** |
| * HTTP request and response headers are represented by this class which implements |
| * the interface |
| * {@link java.util.Map}{@literal <}{@link java.lang.String}, {@link java.util.List} |
| * {@literal <}{@link java.lang.String}{@literal >>}. |
| * The keys are case-insensitive Strings representing the header names and |
| * the value associated with each key is |
| * a {@link List}{@literal <}{@link String}{@literal >} with one |
| * element for each occurrence of the header name in the request or response. |
| * <p> |
| * For example, if a response header instance contains |
| * one key "HeaderName" with two values "value1 and value2" |
| * then this object is output as two header lines: |
| * <blockquote><pre> |
| * HeaderName: value1 |
| * HeaderName: value2 |
| * </pre></blockquote> |
| * <p> |
| * All the normal {@link java.util.Map} methods are provided, but the following |
| * additional convenience methods are most likely to be used: |
| * <ul> |
| * <li>{@link #getFirst(String)} returns a single valued header or the first value of |
| * a multi-valued header.</li> |
| * <li>{@link #add(String,String)} adds the given header value to the list for the given key</li> |
| * <li>{@link #set(String,String)} sets the given header field to the single value given |
| * overwriting any existing values in the value list. |
| * </ul><p> |
| * All methods in this class accept <code>null</code> values for keys and values. However, null |
| * keys will never will be present in HTTP request headers, and will not be output/sent in response headers. |
| * Null values can be represented as either a null entry for the key (i.e. the list is null) or |
| * where the key has a list, but one (or more) of the list's values is null. Null values are output |
| * as a header line containing the key but no associated value. |
| * @since 1.6 |
| */ |
| public class Headers implements Map<String,List<String>> { |
| |
| HashMap<String,List<String>> map; |
| |
| public Headers () {map = new HashMap<String,List<String>>(32);} |
| |
| /* Normalize the key by converting to following form. |
| * First char upper case, rest lower case. |
| * key is presumed to be ASCII |
| */ |
| private String normalize (String key) { |
| if (key == null) { |
| return null; |
| } |
| int len = key.length(); |
| if (len == 0) { |
| return key; |
| } |
| char[] b = key.toCharArray(); |
| if (b[0] >= 'a' && b[0] <= 'z') { |
| b[0] = (char)(b[0] - ('a' - 'A')); |
| } |
| for (int i=1; i<len; i++) { |
| if (b[i] >= 'A' && b[i] <= 'Z') { |
| b[i] = (char) (b[i] + ('a' - 'A')); |
| } |
| } |
| return new String(b); |
| } |
| |
| public int size() {return map.size();} |
| |
| public boolean isEmpty() {return map.isEmpty();} |
| |
| public boolean containsKey(Object key) { |
| if (key == null) { |
| return false; |
| } |
| if (!(key instanceof String)) { |
| return false; |
| } |
| return map.containsKey (normalize((String)key)); |
| } |
| |
| public boolean containsValue(Object value) { |
| return map.containsValue(value); |
| } |
| |
| public List<String> get(Object key) { |
| return map.get(normalize((String)key)); |
| } |
| |
| /** |
| * returns the first value from the List of String values |
| * for the given key (if at least one exists). |
| * @param key the key to search for |
| * @return the first string value associated with the key |
| */ |
| public String getFirst (String key) { |
| List<String> l = map.get(normalize(key)); |
| if (l == null) { |
| return null; |
| } |
| return l.get(0); |
| } |
| |
| public List<String> put(String key, List<String> value) { |
| return map.put (normalize(key), value); |
| } |
| |
| /** |
| * adds the given value to the list of headers |
| * for the given key. If the mapping does not |
| * already exist, then it is created |
| * @param key the header name |
| * @param value the header value to add to the header |
| */ |
| public void add (String key, String value) { |
| String k = normalize(key); |
| List<String> l = map.get(k); |
| if (l == null) { |
| l = new LinkedList<String>(); |
| map.put(k,l); |
| } |
| l.add (value); |
| } |
| |
| /** |
| * sets the given value as the sole header value |
| * for the given key. If the mapping does not |
| * already exist, then it is created |
| * @param key the header name |
| * @param value the header value to set. |
| */ |
| public void set (String key, String value) { |
| LinkedList<String> l = new LinkedList<String>(); |
| l.add (value); |
| put (key, l); |
| } |
| |
| |
| public List<String> remove(Object key) { |
| return map.remove(normalize((String)key)); |
| } |
| |
| public void putAll(Map<? extends String,? extends List<String>> t) { |
| map.putAll (t); |
| } |
| |
| public void clear() {map.clear();} |
| |
| public Set<String> keySet() {return map.keySet();} |
| |
| public Collection<List<String>> values() {return map.values();} |
| |
| public Set<Map.Entry<String, List<String>>> entrySet() { |
| return map.entrySet(); |
| } |
| |
| public boolean equals(Object o) {return map.equals(o);} |
| |
| public int hashCode() {return map.hashCode();} |
| } |