1
22
23 package com.liferay.util;
24
25 import com.liferay.portal.kernel.util.CharPool;
26 import com.liferay.portal.kernel.util.StringPool;
27
28 import com.sun.syndication.feed.synd.SyndContent;
29 import com.sun.syndication.feed.synd.SyndEntry;
30 import com.sun.syndication.feed.synd.SyndFeed;
31 import com.sun.syndication.io.FeedException;
32 import com.sun.syndication.io.SyndFeedOutput;
33
34 import java.util.List;
35
36 import org.jdom.IllegalDataException;
37
38
44 public class RSSUtil {
45
46 public static final String RSS = "rss";
47
48 public static final double[] RSS_VERSIONS = new double[] {
49 0.9, 0.91, 0.93, 0.94, 1.0, 2.0
50 };
51
52 public static final String ATOM = "atom";
53
54 public static final double[] ATOM_VERSIONS = new double[] {0.3, 1.0};
55
56 public static final String DEFAULT_TYPE = ATOM;
57
58 public static final double DEFAULT_VERSION = 1.0;
59
60 public static final String DEFAULT_ENTRY_TYPE = "html";
61
62 public static final String DEFAULT_FEED_TYPE = getFeedType(
63 DEFAULT_TYPE, DEFAULT_VERSION);
64
65 public static final String DISPLAY_STYLE_ABSTRACT = "abstract";
66
67 public static final String DISPLAY_STYLE_FULL_CONTENT = "full-content";
68
69 public static final String DISPLAY_STYLE_TITLE = "title";
70
71 public static String export(SyndFeed feed) throws FeedException {
72 feed.setEncoding(StringPool.UTF8);
73
74 SyndFeedOutput output = new SyndFeedOutput();
75
76 try {
77 return output.outputString(feed);
78 }
79 catch (IllegalDataException ide) {
80
81
83 _regexpStrip(feed);
84
85 return output.outputString(feed);
86 }
87 }
88
89 public static String getFeedType(String type, double version) {
90 return type + StringPool.UNDERLINE + version;
91 }
92
93 private static void _regexpStrip(SyndFeed feed) {
94 feed.setTitle(_regexpStrip(feed.getTitle()));
95 feed.setDescription(_regexpStrip(feed.getDescription()));
96
97 List<SyndEntry> entries = feed.getEntries();
98
99 for (SyndEntry entry : entries) {
100 entry.setTitle(_regexpStrip(entry.getTitle()));
101
102 SyndContent content = entry.getDescription();
103
104 content.setValue(_regexpStrip(content.getValue()));
105 }
106 }
107
108 private static String _regexpStrip(String text) {
109 text = Normalizer.normalizeToAscii(text);
110
111 char[] array = text.toCharArray();
112
113 for (int i = 0; i < array.length; i++) {
114 String s = String.valueOf(array[i]);
115
116 if (!s.matches(_REGEXP_STRIP)) {
117 array[i] = CharPool.SPACE;
118 }
119 }
120
121 return new String(array);
122 }
123
124 private static final String _REGEXP_STRIP = "[\\d\\w]";
125
126 }