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1
16
17 package org.apache.jetspeed.portal.portlets;
18
19 import org.apache.jetspeed.util.JetspeedClearElement;
21 import org.apache.ecs.ConcreteElement;
22
23 import org.apache.jetspeed.portal.PortletConfig;
25 import org.apache.jetspeed.portal.PortletException;
26 import org.apache.jetspeed.services.logging.JetspeedLogFactoryService;
27 import org.apache.jetspeed.services.logging.JetspeedLogger;
28 import org.apache.jetspeed.util.HTMLRewriter;
29 import org.apache.jetspeed.util.Base64;
30
31 import org.apache.turbine.util.RunData;
33
34 import java.io.InputStreamReader  ;
36 import java.io.IOException ;
37 import java.io.Reader ;
38 import java.net.URL ;
39 import java.net.URLConnection ;
40 import java.util.StringTokenizer ;
41
42
51 public class WebPagePortlet extends AbstractInstancePortlet
52 {
53
56 private static final JetspeedLogger logger = JetspeedLogFactoryService.getLogger(WebPagePortlet.class.getName());
57
58 protected HTMLRewriter rewriter = null;
59 protected boolean initDone = false;
60 protected boolean contentStale = true;
61 protected boolean cacheContent = false;
62 protected String username = null;
63 protected String password = null;
64
65
69 public void init() throws PortletException {
70
71 if (initDone) return;
73
74 PortletConfig config = this.getPortletConfig();
75
76 try
77 {
78 rewriter = new HTMLRewriter(
80 ! config.getInitParameter("dont_remove_script","no")
81 .equalsIgnoreCase("yes"),
82 ! config.getInitParameter("dont_remove_style","no")
83 .equalsIgnoreCase("yes"),
84 ! config.getInitParameter("dont_remove_noscript","no")
85 .equalsIgnoreCase("yes"),
86 ! config.getInitParameter("dont_remove_meta","no")
87 .equalsIgnoreCase("yes"),
88 ! config.getInitParameter("dont_remove_applet","no")
89 .equalsIgnoreCase("yes"),
90 ! config.getInitParameter("dont_remove_object","no")
91 .equalsIgnoreCase("yes"),
92 ! config.getInitParameter("dont_remove_head","no")
93 .equalsIgnoreCase("yes"),
94 ! config.getInitParameter("dont_remove_onsomething","no")
95 .equalsIgnoreCase("yes"),
96 config.getInitParameter("open_in_popup","no")
97 .equalsIgnoreCase("yes")
98 );
99
100 username = config.getInitParameter("username");
102 password = config.getInitParameter("password");
103
104 contentStale = true;
105 initDone = true;
106 } catch (Exception e) {
107 logger.info("Exception occurred:" + e.toString());
108 e.printStackTrace();
109 throw new PortletException( e.toString() );
110 }
111 }
112
113
117 protected Reader getReader(String url) throws IOException
120 {
121 URL pageUrl = new URL (url);
122
123 URLConnection pageConn = pageUrl.openConnection();
124 try
125 {
126 if (username != null && password !=null)
128 {
129 pageConn.setRequestProperty("Authorization", "Basic " +
130 Base64.encodeAsString(username + ":" + password));
131 }
132
133 }
134 catch (Exception e)
135 {
136 logger.info("Exception occurred:" + e.toString(), e);
137 }
138
139 long pageExpiration = pageConn.getExpiration();
140 String encoding = "iso-8859-1";
141 String contentType = pageConn.getContentType();
142 String tempString = null;
143 String noCache = "no-cache";
144
145 if (contentType != null)
146 {
147 StringTokenizer st = new StringTokenizer (contentType, "; =");
148 while (st.hasMoreTokens())
149 {
150 if (st.nextToken().equalsIgnoreCase("charset"))
151 {
152 try
153 {
154 encoding = st.nextToken();
155 break;
156 }
157 catch (Exception e)
158 {
159 break;
160 }
161 }
162 }
163 }
164
165
168 cacheContent = true; if (pageExpiration == 0) {
170 cacheContent = false;
171 }
172 tempString = pageConn.getHeaderField( "Cache-Control");
174 if (tempString != null) {
175 if (tempString.toLowerCase().indexOf(noCache) >= 0) {
176 cacheContent = false;
177 }
178 }
179 tempString = pageConn.getHeaderField( "Pragma");
181 if (tempString != null) {
182 if (tempString.toLowerCase().indexOf(noCache) >= 0) {
183 cacheContent = false;
184 }
185 }
186
187 Reader rdr = new InputStreamReader (pageConn.getInputStream(),
189 encoding );
190
191 if (pageExpiration > System.currentTimeMillis() && (cacheContent == true))
193 {
194 contentStale = false;
195 logger.debug( "WebPagePortlet caching URL: " +
196 url +
197 " Expiration: " +
198 pageExpiration +
199 ", " +
200 (pageExpiration - System.currentTimeMillis() ) +
201 " milliseconds into the future" );
202 setExpirationMillis(pageExpiration);
203 } else {
204 contentStale = true;
205 }
206
207 return rdr;
208 }
209
210
211
218 public ConcreteElement getContent( RunData data )
219 {
220 PortletConfig config = this.getPortletConfig();
221
222 if (contentStale == true)
223 return getWebPageContent(data, config);
224
225 if (null == getExpirationMillis())
226 return getContent( data, null, true);
227
228 if (getExpirationMillis().longValue() <= System.currentTimeMillis())
229 return getWebPageContent(data, config);
230
231 return getContent( data, null , true );
232 }
233
234 private ConcreteElement getWebPageContent( RunData data, PortletConfig config )
235 {
236
237 String convertedString = null; JetspeedClearElement element = null;
239
240 String url = selectUrl( data, config );
241
242 try
243 {
244 Reader htmlReader = getReader( url );
245 convertedString = rewriter.convertURLs(htmlReader, url);
247 element = new JetspeedClearElement(convertedString);
248
249 this.clearContent(); this.setContent(element);
252
253 htmlReader.close();
254
255 } catch (Exception e) {
256 logger.info("Exception occurred:" + e.toString(), e);
257 }
258
259 return element;
260 }
261
262
268 public void refresh() {
269 if (cacheContent == true) {
270 getWebPageContent(null, this.getPortletConfig());
271 }
272 }
273
274
278 protected String selectUrl( RunData data, PortletConfig config )
279 {
280 String url = config.getURL();
281
282 return url;
283
284 }
286 }
287 |
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