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1
10 package org.mmbase.bridge.jsp.taglib.pageflow;
11
12 import java.util.*;
13 import java.io.*;
14 import java.net.*;
15 import org.mmbase.bridge.jsp.taglib.*;
16 import org.mmbase.bridge.jsp.taglib.util.Attribute;
17 import org.mmbase.bridge.jsp.taglib.util.Referids;
18
19 import javax.servlet.jsp.JspTagException  ;
20 import javax.servlet.jsp.JspException ;
21
22
23 import org.mmbase.util.transformers.Url;
24 import org.mmbase.util.transformers.CharTransformer;
25
26 import org.mmbase.util.Casting;
27 import org.mmbase.util.Entry;
28
29 import org.mmbase.util.logging.Logger;
30 import org.mmbase.util.logging.Logging;
31
32
33
39
40 public class UrlTag extends CloudReferrerTag implements ParamHandler {
41
42 private static final Logger log = Logging.getLoggerInstance(UrlTag.class);
43
44 private static final CharTransformer paramEscaper = new Url(Url.ESCAPE);
45
46 private static Boolean makeRelative = null;
47 private Attribute referids = Attribute.NULL;
48 protected final List extraParameters = new ArrayList();
49 protected Attribute page = Attribute.NULL;
50 protected Attribute escapeAmps = Attribute.NULL;
51 private Attribute absolute = Attribute.NULL;
52 protected Attribute encode = Attribute.NULL;
53
54 public void setReferids(String r) throws JspTagException {
55 referids = getAttribute(r);
56 }
57
58 public void setPage(String p) throws JspTagException {
59 page = getAttribute(p);
60 }
61
62 public void setEscapeamps(String e) throws JspTagException {
63 escapeAmps = getAttribute(e);
64 }
65
66 public void setEncode(String e) throws JspTagException {
67 encode = getAttribute(e);
68 }
69
70
73 public void setAbsolute(String a) throws JspTagException {
74 absolute = getAttribute(a);
75 }
76
77
78 public void addParameter(String key, Object value) throws JspTagException {
79 if (log.isDebugEnabled()) {
80 log.debug("adding parameter " + key + "/" + value);
81 }
82 extraParameters.add(new Entry(key, value));
83 }
84
85
86
87 public int doStartTag() throws JspTagException {
88 log.debug("starttag");
89 extraParameters.clear();
90 helper.useEscaper(false);
91 return EVAL_BODY_BUFFERED;
92 }
93
94
95 protected String getPage() throws JspTagException {
96 return page.getString(this);
97 }
98
99
107 protected StringBuffer makeRelative(StringBuffer show) {
108 javax.servlet.http.HttpServletRequest req = (javax.servlet.http.HttpServletRequest )pageContext.getRequest();
109 if (show.charAt(0) == '/') { if (show.length() > 1 && show.charAt(1) == '/') {
111 log.debug("'absolute' url, not making relative");
112 if (addContext()) {
113 show.deleteCharAt(0);
114 show.insert(0, req.getContextPath());
115 }
116 } else {
117 log.debug("'absolute' url");
118 String thisDir = new java.io.File (req.getServletPath()).getParent();
119 show.insert(0, org.mmbase.util.UriParser.makeRelative(thisDir, "/")); }
121 }
122 return show;
123 }
124
125
133 protected boolean doMakeRelative() {
134 if (makeRelative == null) {
135 String setting = pageContext.getServletContext().getInitParameter("mmbase.taglib.url.makerelative");
136 makeRelative = "true".equals(setting) ? Boolean.TRUE : Boolean.FALSE;
137 }
138 return makeRelative.booleanValue();
139 }
140
141 protected boolean addContext() {
142 return true;
143 }
144
145
148 protected boolean useAbsoluteAttribute(StringBuffer show, String page) throws JspTagException {
149 String abs = absolute.getString(this);
150 if ("".equals(abs) || "false".equals(abs)) return false;
151 javax.servlet.http.HttpServletRequest req = (javax.servlet.http.HttpServletRequest ) pageContext.getRequest();
152
153 if (abs.equals("true")) {
154 String scheme = req.getScheme();
155 show.append(scheme).append("://");
156 show.append(req.getServerName());
157 int port = req.getServerPort();
158 show.append((port == 80 && "http".equals(scheme)) ||
159 (port == 443 && "https".equals(scheme))
160 ? "" : ":" + port);
161 } else if (abs.equals("server")) {
162 } else if (abs.equals("context")) {
164 } else {
165 throw new JspTagException ("Unknown value for 'absolute' attribute '" + abs + "' (must be either 'true', 'false', 'server' or 'context')");
166 }
167 if (! abs.equals("context")) {
168 show.append(req.getContextPath());
169 }
170 char firstChar = page.charAt(0);
171 try {
172 URI uri;
173 if (firstChar != '/') {
174 uri = new URI("servlet", req.getServletPath() + "/../" + page, null);
175 } else {
176 uri = new URI("servlet", page, null);
177 }
178 uri = uri.normalize(); show.append(uri.getSchemeSpecificPart());
180 } catch (URISyntaxException use) {
181 throw new TaglibException(use.getMessage(), use);
182 }
183 return true;
184 }
185
186
189 protected String getUrl(boolean writeamp, boolean encodeUrl) throws JspTagException {
190 StringWriter w = new StringWriter();
191 StringBuffer show = w.getBuffer();
192
193
194 if (referid != Attribute.NULL) {
195 if (page != Attribute.NULL) throw new TaglibException("Cannot specify both 'referid' and 'page' attributes");
196 String url = (String ) getObject(getReferid());
197 if (writeamp) {
198 url = url.replaceAll("&", "&");
199 }
200 if (! useAbsoluteAttribute(show, url)) {
201 show.append(url);
202 }
203 } else {
204 String page = getPage();
205 javax.servlet.http.HttpServletRequest req = (javax.servlet.http.HttpServletRequest ) pageContext.getRequest();
206 if (page.equals("")) { String requestURI = req.getRequestURI();
208 if (requestURI.endsWith("/")) {
209 page = ".";
210 } else {
211 page = new File(requestURI).getName();
212 }
213
214 }
215 if (!useAbsoluteAttribute(show, page)) {
216 if (doMakeRelative()) {
217 show.append(page);
218 page = "";
219 makeRelative(show);
220 } else {
221 if (addContext() && page.charAt(0) == '/') { show.append(req.getContextPath());
223 }
224 }
225 show.append(page);
226 }
227
228 }
229
230
231
233
234 String amp = (writeamp ? "&" : "&");
235 String connector = (show.toString().indexOf('?') == -1 ? "?" : amp);
236
237 if (referids != Attribute.NULL) {
238 Iterator refs = Referids.getReferids(referids, this).entrySet().iterator();
239 while (refs.hasNext()) {
240 Map.Entry entry = (Map.Entry) refs.next();
241 show.append(connector).append(entry.getKey()).append("=");
242 paramEscaper.transform(new StringReader(Casting.toString(entry.getValue())), w);
243 connector = amp;
244 }
245 }
246 Iterator i = extraParameters.iterator();
247 while (i.hasNext()) {
248 Entry param = (Entry) i.next();
249 if (param.getValue() == null) continue;
250 show.append(connector).append(param.getKey()).append('=');
251 paramEscaper.transform(new StringReader(Casting.toString(param.getValue())), w);
252 connector = amp;
253 }
254 if (encodeUrl) {
255 javax.servlet.http.HttpServletResponse response = (javax.servlet.http.HttpServletResponse )pageContext.getResponse();
256 return response.encodeURL(show.toString());
257 } else {
258 return show.toString();
259 }
260 }
261
262 protected String getUrl() throws JspTagException {
263 return getUrl(escapeAmps.getBoolean(this, true));
264 }
265
266 protected String getUrl(boolean e) throws JspTagException {
267 return getUrl(e, encode.getBoolean(this, true));
268 }
269
270 protected void doAfterBodySetValue() throws JspTagException {
271 helper.setValue(getUrl());
272 }
273
274 public int doAfterBody() throws JspException {
275 if (bodyContent != null) bodyContent.clearBody(); return helper.doAfterBody();
277 }
278
279
280 protected void initDoEndTag() throws JspTagException {
281 log.debug("endtag of url tag");
282 if (helper.getJspvar() == null) {
283 helper.overrideWrite(true);
284 }
287
288 }
289 public int doEndTag() throws JspTagException {
290 if (getId() != null) {
291 getContextProvider().getContextContainer().register(getId(), getUrl(false, false)); }
293 initDoEndTag();
294 doAfterBodySetValue();
295 helper.doEndTag();
296 extraParameters.clear();
297 return super.doEndTag();
298 }
299
300
301 }
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