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comparison src/fschmidt/tools/CrawlSite.java @ 68:00520880ad02

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add fschmidt source
author Franklin Schmidt <fschmidt@gmail.com>
date Sun, 05 Oct 2025 17:24:15 -0600
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67:9d0fefce6985 68:00520880ad02
1 /*
2 Copyright (c) 2008 Franklin Schmidt <fschmidt@gmail.com>
3
4 Permission is hereby granted, free of charge, to any person obtaining a copy
5 of this software and associated documentation files (the "Software"), to deal
6 in the Software without restriction, including without limitation the rights
7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 copies of the Software, and to permit persons to whom the Software is
9 furnished to do so, subject to the following conditions:
10
11 The above copyright notice and this permission notice shall be included in
12 all copies or substantial portions of the Software.
13
14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
20 THE SOFTWARE.
21 */
22
23 package fschmidt.tools;
24
25 import java.io.IOException;
26 import java.net.URL;
27 import java.util.Set;
28 import java.util.HashSet;
29 import java.util.Map;
30 import java.util.HashMap;
31 import java.util.Arrays;
32 import java.util.Iterator;
33 import fschmidt.util.java.IoUtils;
34 import fschmidt.html.Html;
35 import fschmidt.html.HtmlTag;
36
37
38 public class CrawlSite {
39 private static final Set<String> endings = new HashSet<String>( Arrays.asList( new String[]{
40 "html", "htm", "ssp", "jsp", "jtp",
41 } ) );
42 private static final Map<String,String> tagMap = new HashMap<String,String>();
43 static {
44 tagMap.put("a","href");
45 tagMap.put("area","href");
46 tagMap.put("base","href");
47 tagMap.put("form","action");
48 tagMap.put("frame","src");
49 tagMap.put("img","src");
50 tagMap.put("link","href");
51 tagMap.put("input","src");
52 }
53
54 private String baseUrl;
55 private Set<String> done = new HashSet<String>();
56
57 public CrawlSite(String baseUrl) {
58 this.baseUrl = baseUrl;
59 }
60
61 protected boolean isHtml(String url) {
62 url = url.substring( url.lastIndexOf('/') + 1 );
63 int i = url.indexOf('.');
64 if( i == -1 )
65 return true;
66 String ending = url.substring(i+1);
67 return endings.contains(ending);
68 }
69
70 protected void process(String url) {
71 System.out.println(url);
72 }
73
74 public void crawl()
75 throws IOException
76 {
77 crawl(baseUrl);
78 }
79
80 private void crawl(String url)
81 throws IOException
82 {
83 if( !done.add(url) )
84 return;
85
86 process(url);
87
88 if( !isHtml(url) )
89 return;
90
91 String page = IoUtils.readPage(url);
92 Html html = new Html(page);
93 Iterator iter = html.iterator();
94 while( iter.hasNext() ) {
95 Object o = iter.next();
96 if( !(o instanceof HtmlTag) )
97 continue;
98 HtmlTag tag = (HtmlTag)o;
99 String tagName = tag.getName().toLowerCase();
100 String attrName = (String)tagMap.get(tagName);
101 if( attrName==null )
102 continue;
103 String val = tag.getAttributeValue(attrName);
104 if( val==null )
105 continue;
106 String url2 = HtmlTag.unquote(val);
107 url2 = new URL(new URL(url),url2).toString();
108 if( !url2.startsWith(baseUrl) )
109 continue;
110 int i = url2.indexOf('#');
111 if( i != -1 )
112 url2 = url2.substring(0,i);
113 String file = url2.substring( url2.lastIndexOf('/') + 1 );
114 if( file.length() > 0 && file.indexOf('.') == -1 )
115 url2 += '/';
116 try {
117 crawl(url2);
118 } catch(IOException e) {
119 // System.err.println(e);
120 System.err.println(e+" referred to from "+url);
121 // e.printStackTrace();
122 }
123 }
124 }
125
126 public static void main(String[] args) throws Exception {
127 new CrawlSite(args[0]).crawl();
128 }
129 }