source: josm/trunk/src/org/openstreetmap/josm/tools/WikiReader.java@ 9621

Last change on this file since 9621 was 9168, checked in by simon04, 8 years ago

see #12231 - Uniform access to HTTP resources
  • Property svn:eol-style set to native
File size: 5.7 KB
Line 
1// License: GPL. For details, see LICENSE file.
2package org.openstreetmap.josm.tools;
3
4import java.io.BufferedReader;
5import java.io.IOException;
6import java.net.URL;
7
8import org.openstreetmap.josm.Main;
9import org.openstreetmap.josm.tools.LanguageInfo.LocaleType;
10
11/**
12 * Read a trac-wiki page.
13 *
14 * @author imi
15 */
16public class WikiReader {
17
18 private final String baseurl;
19
20 /**
21 * Constructs a new {@code WikiReader} for the given base URL.
22 * @param baseurl The wiki base URL
23 */
24 public WikiReader(String baseurl) {
25 this.baseurl = baseurl;
26 }
27
28 /**
29 * Constructs a new {@code WikiReader}.
30 */
31 public WikiReader() {
32 this(Main.pref.get("help.baseurl", Main.getJOSMWebsite()));
33 }
34
35 /**
36 * Returns the base URL of wiki.
37 * @return the base URL of wiki
38 * @since 7434
39 */
40 public final String getBaseUrlWiki() {
41 return baseurl + "/wiki/";
42 }
43
44 /**
45 * Read the page specified by the url and return the content.
46 *
47 * If the url is within the baseurl path, parse it as an trac wikipage and replace relative paths etc..
48 * @param url the URL to read
49 * @return The page as string
50 *
51 * @throws IOException Throws, if the page could not be loaded.
52 */
53 public String read(String url) throws IOException {
54 URL u = new URL(url);
55 try (BufferedReader in = HttpClient.create(u).connect().getContentReader()) {
56 boolean txt = url.endsWith("?format=txt");
57 if (url.startsWith(getBaseUrlWiki()) && !txt)
58 return readFromTrac(in, u);
59 return readNormal(in, !txt);
60 }
61 }
62
63 /**
64 * Reads the localized version of the given wiki page.
65 * @param text The page title, without locale prefix
66 * @return the localized version of the given wiki page
67 * @throws IOException if any I/O error occurs
68 */
69 public String readLang(String text) throws IOException {
70 String languageCode;
71 String res = "";
72
73 languageCode = LanguageInfo.getWikiLanguagePrefix(LocaleType.DEFAULTNOTENGLISH);
74 if (languageCode != null) {
75 res = readLang(new URL(getBaseUrlWiki() + languageCode + text));
76 }
77
78 if (res.isEmpty()) {
79 languageCode = LanguageInfo.getWikiLanguagePrefix(LocaleType.BASELANGUAGE);
80 if (languageCode != null) {
81 res = readLang(new URL(getBaseUrlWiki() + languageCode + text));
82 }
83 }
84
85 if (res.isEmpty()) {
86 languageCode = LanguageInfo.getWikiLanguagePrefix(LocaleType.ENGLISH);
87 if (languageCode != null) {
88 res = readLang(new URL(getBaseUrlWiki() + languageCode + text));
89 }
90 }
91
92 if (res.isEmpty()) {
93 throw new IOException(text + " does not exist");
94 } else {
95 return res;
96 }
97 }
98
99 private String readLang(URL url) throws IOException {
100 try (BufferedReader in = HttpClient.create(url).connect().getContentReader()) {
101 return readFromTrac(in, url);
102 }
103 }
104
105 private static String readNormal(BufferedReader in, boolean html) throws IOException {
106 StringBuilder b = new StringBuilder();
107 for (String line = in.readLine(); line != null; line = in.readLine()) {
108 if (!line.contains("[[TranslatedPages]]")) {
109 b.append(line.replaceAll(" />", ">")).append('\n');
110 }
111 }
112 return html ? "<html>" + b + "</html>" : b.toString();
113 }
114
115 protected String readFromTrac(BufferedReader in, URL url) throws IOException {
116 boolean inside = false;
117 boolean transl = false;
118 boolean skip = false;
119 StringBuilder b = new StringBuilder();
120 StringBuilder full = new StringBuilder();
121 for (String line = in.readLine(); line != null; line = in.readLine()) {
122 full.append(line);
123 if (line.contains("<div id=\"searchable\">")) {
124 inside = true;
125 } else if (line.contains("<div class=\"wiki-toc trac-nav\"")) {
126 transl = true;
127 } else if (line.contains("<div class=\"wikipage searchable\">")) {
128 inside = true;
129 } else if (line.contains("<div class=\"buttons\">")) {
130 inside = false;
131 } else if (line.contains("<h3>Attachments</h3>")) {
132 inside = false;
133 } else if (line.contains("<div id=\"attachments\">")) {
134 inside = false;
135 } else if (line.contains("<div class=\"trac-modifiedby\">")) {
136 skip = true;
137 }
138 if (inside && !transl && !skip) {
139 // add a border="0" attribute to images, otherwise the internal help browser
140 // will render a thick border around images inside an <a> element
141 // remove width information to avoid distorded images (fix #11262)
142 b.append(line.replaceAll("<img ", "<img border=\"0\" ")
143 .replaceAll("width=\"(\\d+)\"", "")
144 .replaceAll("<span class=\"icon\">.</span>", "")
145 .replaceAll("href=\"/", "href=\"" + baseurl + '/')
146 .replaceAll(" />", ">"))
147 .append('\n');
148 } else if (transl && line.contains("</div>")) {
149 transl = false;
150 }
151 if (line.contains("</div>")) {
152 skip = false;
153 }
154 }
155 if (b.indexOf(" Describe ") >= 0
156 || b.indexOf(" does not exist. You can create it here.</p>") >= 0)
157 return "";
158 if (b.length() == 0)
159 b = full;
160 return "<html><base href=\""+url.toExternalForm() +"\"> " + b + "</html>";
161 }
162}
Note: See TracBrowser for help on using the repository browser.