HtmlCleaner


1   /*
2    * Copyright 2004 Outerthought bvba and Schaubroeck nv
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *     http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package org.outerj.daisy.htmlcleaner;
17  
18  import java.io.OutputStream  ;
19  import java.io.ByteArrayOutputStream  ;
20  import org.outerj.daisy.xmlutil.SaxBuffer;
21  
22  /**
23   * Performs cleanup of HTML documents to well-formed HTML-as-XML documents.
24   *
25   * <p>More information:
26   * <ul>
27   *  <li>To instantiate: see {@link HtmlCleanerFactory} and {@link HtmlCleanerTemplate}
28   *  <li>About cleanup procedure: see {@link NekoHtmlParser}, {@link HtmlRepairer}
29   *      and {@link StylingHtmlSerializer}.
30   * </ul>
31   */
32  public class HtmlCleaner {
33      private HtmlCleanerTemplate template;
34  
35      HtmlCleaner(HtmlCleanerTemplate template) {
36          this.template = template;
37      }
38  
39      /**
40       * Parses and cleans up the HTML, writing the result to the given outputstream,
41       * encoded as UTF-8.
42       */
43      public void clean(String   somethingWhichLooksLikeHtml, OutputStream   outputStream) throws Exception   {
44          NekoHtmlParser parser = new NekoHtmlParser();
45          SaxBuffer buffer = parser.parse(GeckoCorruptTagCleaner.clean(somethingWhichLooksLikeHtml));
46  
47          StylingHtmlSerializer serializer = new StylingHtmlSerializer(template);
48          serializer.setOutputStream(outputStream);
49          HtmlRepairer repairer = new HtmlRepairer(template);
50  
51          repairer.clean(buffer, new MergeCharacterEventsHandler(serializer));
52      }
53  
54      public byte[] cleanToByteArray(String   somethingWhichLooksLikeHtml) throws Exception   {
55          ByteArrayOutputStream   os = new ByteArrayOutputStream  (10000);
56          clean(somethingWhichLooksLikeHtml, os);
57          return os.toByteArray();
58      }
59  
60      public String   cleanToString(String   somethingWhichLooksLikeHtml) throws Exception   {
61          ByteArrayOutputStream   os = new ByteArrayOutputStream  (10000);
62          clean(somethingWhichLooksLikeHtml, os);
63          return os.toString("UTF-8");
64      }
65  }
66
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