1 /*
2  * ====================================================================
3  * Licensed to the Apache Software Foundation (ASF) under one
4  * or more contributor license agreements.  See the NOTICE file
5  * distributed with this work for additional information
6  * regarding copyright ownership.  The ASF licenses this file
7  * to you under the Apache License, Version 2.0 (the
8  * "License"); you may not use this file except in compliance
9  * with the License.  You may obtain a copy of the License at
10  *
11  *   http://www.apache.org/licenses/LICENSE-2.0
12  *
13  * Unless required by applicable law or agreed to in writing,
14  * software distributed under the License is distributed on an
15  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16  * KIND, either express or implied.  See the License for the
17  * specific language governing permissions and limitations
18  * under the License.
19  * ====================================================================
20  *
21  * This software consists of voluntary contributions made by many
22  * individuals on behalf of the Apache Software Foundation.  For more
23  * information on the Apache Software Foundation, please see
24  * <http://www.apache.org/>.
25  *
26  */
27 
28 package ch.boye.httpclientandroidlib.impl.cookie;
29 
30 import java.util.ArrayList;
31 import java.util.List;
32 
33 import ch.boye.httpclientandroidlib.HeaderElement;
34 import ch.boye.httpclientandroidlib.NameValuePair;
35 import ch.boye.httpclientandroidlib.ParseException;
36 import ch.boye.httpclientandroidlib.annotation.Immutable;
37 import ch.boye.httpclientandroidlib.message.BasicHeaderElement;
38 import ch.boye.httpclientandroidlib.message.BasicNameValuePair;
39 import ch.boye.httpclientandroidlib.message.ParserCursor;
40 import ch.boye.httpclientandroidlib.protocol.HTTP;
41 import ch.boye.httpclientandroidlib.util.Args;
42 import ch.boye.httpclientandroidlib.util.CharArrayBuffer;
43 
44 /**
45  *
46  * @since 4.0
47  */
48 @Immutable
49 public class NetscapeDraftHeaderParser {
50 
51     public final static NetscapeDraftHeaderParser DEFAULT = new NetscapeDraftHeaderParser();
52 
NetscapeDraftHeaderParser()53     public NetscapeDraftHeaderParser() {
54         super();
55     }
56 
parseHeader( final CharArrayBuffer buffer, final ParserCursor cursor)57     public HeaderElement parseHeader(
58             final CharArrayBuffer buffer,
59             final ParserCursor cursor) throws ParseException {
60         Args.notNull(buffer, "Char array buffer");
61         Args.notNull(cursor, "Parser cursor");
62         final NameValuePair nvp = parseNameValuePair(buffer, cursor);
63         final List<NameValuePair> params = new ArrayList<NameValuePair>();
64         while (!cursor.atEnd()) {
65             final NameValuePair param = parseNameValuePair(buffer, cursor);
66             params.add(param);
67         }
68         return new BasicHeaderElement(
69                 nvp.getName(),
70                 nvp.getValue(), params.toArray(new NameValuePair[params.size()]));
71     }
72 
parseNameValuePair( final CharArrayBuffer buffer, final ParserCursor cursor)73     private NameValuePair parseNameValuePair(
74             final CharArrayBuffer buffer, final ParserCursor cursor) {
75         boolean terminated = false;
76 
77         int pos = cursor.getPos();
78         final int indexFrom = cursor.getPos();
79         final int indexTo = cursor.getUpperBound();
80 
81         // Find name
82         String name = null;
83         while (pos < indexTo) {
84             final char ch = buffer.charAt(pos);
85             if (ch == '=') {
86                 break;
87             }
88             if (ch == ';') {
89                 terminated = true;
90                 break;
91             }
92             pos++;
93         }
94 
95         if (pos == indexTo) {
96             terminated = true;
97             name = buffer.substringTrimmed(indexFrom, indexTo);
98         } else {
99             name = buffer.substringTrimmed(indexFrom, pos);
100             pos++;
101         }
102 
103         if (terminated) {
104             cursor.updatePos(pos);
105             return new BasicNameValuePair(name, null);
106         }
107 
108         // Find value
109         String value = null;
110         int i1 = pos;
111 
112         while (pos < indexTo) {
113             final char ch = buffer.charAt(pos);
114             if (ch == ';') {
115                 terminated = true;
116                 break;
117             }
118             pos++;
119         }
120 
121         int i2 = pos;
122         // Trim leading white spaces
123         while (i1 < i2 && (HTTP.isWhitespace(buffer.charAt(i1)))) {
124             i1++;
125         }
126         // Trim trailing white spaces
127         while ((i2 > i1) && (HTTP.isWhitespace(buffer.charAt(i2 - 1)))) {
128             i2--;
129         }
130         value = buffer.substring(i1, i2);
131         if (terminated) {
132             pos++;
133         }
134         cursor.updatePos(pos);
135         return new BasicNameValuePair(name, value);
136     }
137 
138 }
139