001    /****************************************************************
002     * Licensed to the Apache Software Foundation (ASF) under one   *
003     * or more contributor license agreements.  See the NOTICE file *
004     * distributed with this work for additional information        *
005     * regarding copyright ownership.  The ASF licenses this file   *
006     * to you under the Apache License, Version 2.0 (the            *
007     * "License"); you may not use this file except in compliance   *
008     * with the License.  You may obtain a copy of the License at   *
009     *                                                              *
010     *   http://www.apache.org/licenses/LICENSE-2.0                 *
011     *                                                              *
012     * Unless required by applicable law or agreed to in writing,   *
013     * software distributed under the License is distributed on an  *
014     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
015     * KIND, either express or implied.  See the License for the    *
016     * specific language governing permissions and limitations      *
017     * under the License.                                           *
018     ****************************************************************/
019    
020    package org.apache.james.mime4j.field;
021    
022    import java.io.StringReader;
023    
024    import org.apache.james.mime4j.codec.DecodeMonitor;
025    import org.apache.james.mime4j.dom.FieldParser;
026    import org.apache.james.mime4j.dom.field.ContentLocationField;
027    import org.apache.james.mime4j.field.structured.parser.ParseException;
028    import org.apache.james.mime4j.field.structured.parser.StructuredFieldParser;
029    import org.apache.james.mime4j.stream.Field;
030    
031    /**
032     * Represents a <code>Content-Location</code> field.
033     */
034    public class ContentLocationFieldImpl extends AbstractField implements ContentLocationField {
035    
036        private boolean parsed = false;
037        private String location;
038        private ParseException parseException;
039    
040        ContentLocationFieldImpl(Field rawField, DecodeMonitor monitor) {
041            super(rawField, monitor);
042        }
043    
044        private void parse() {
045            parsed = true;
046            String body = getBody();
047            location = null;
048            if (body != null) {
049                StringReader stringReader = new StringReader(body);
050                StructuredFieldParser parser = new StructuredFieldParser(stringReader);
051                try {
052                    // From RFC2017 3.1
053                    /*
054                     * Extraction of the URL string from the URL-parameter is even simpler:
055                     * The enclosing quotes and any linear whitespace are removed and the
056                     * remaining material is the URL string.
057                     * Read more: http://www.faqs.org/rfcs/rfc2017.html#ixzz0aufO9nRL
058                     */
059                    location = parser.parse().replaceAll("\\s", "");
060                } catch (ParseException ex) {
061                    parseException = ex;
062                }
063            }
064        }
065    
066        public String getLocation() {
067            if (!parsed) {
068                parse();
069            }
070            return location;
071        }
072    
073        @Override
074        public org.apache.james.mime4j.dom.field.ParseException getParseException() {
075            return parseException;
076        }
077    
078        public static final FieldParser<ContentLocationField> PARSER = new FieldParser<ContentLocationField>() {
079    
080            public ContentLocationField parse(final Field rawField, final DecodeMonitor monitor) {
081                return new ContentLocationFieldImpl(rawField, monitor);
082            }
083    
084        };
085    
086    }
087