Changeset 24019 for main/trunk/greenstone3/src/java/org/greenstone/gsdl3
- Timestamp:
- 2011-05-17T13:20:56+12:00 (13 years ago)
- Location:
- main/trunk/greenstone3/src/java/org/greenstone/gsdl3
- Files:
-
- 2 edited
Legend:
- Unmodified
- Added
- Removed
-
main/trunk/greenstone3/src/java/org/greenstone/gsdl3/LibraryServlet.java
r23968 r24019 23 23 24 24 /** a servlet to serve the greenstone library - we are using servlets instead 25 26 27 28 29 30 31 32 33 34 35 36 37 38 25 * of cgi 26 * the init method is called only once - the first time the servlet classes 27 * are loaded. Each time a request comes in to the servlet, the session() 28 * method is called in a new thread (calls doGet/doPut etc) 29 * takes the a=p&p=home type args and builds a simple request to send to 30 * its receptionist, which returns a result in html, cos output=html 31 * is set in the request 32 * 33 * 18/Jul/07 xiao 34 * modify to make the cached parameters collection-specific. 35 * Most of the work is done in doGet(), except adding an inner class UserSessionCache. 36 * 37 * @see Receptionist 38 */ 39 39 public class LibraryServlet extends HttpServlet { 40 41 /** the receptionist to send messages to */ 42 protected Receptionist recept=null; 43 44 /** the default language - is specified by setting a servlet param, 45 * otherwise DEFAULT_LANG is used*/ 46 protected String default_lang= null; 47 48 /** Whether or not client-side XSLT support should be exposed */ 49 protected boolean supports_client_xslt = false; 50 51 /** The default default - used if a default lang is not specified 52 * in the servlet params */ 53 protected final String DEFAULT_LANG = "en"; 54 55 /** container Document to create XML Nodes */ 56 protected Document doc=null; 57 58 /** a converter class to parse XML and create Docs */ 59 protected XMLConverter converter=null; 60 61 /** the cgi stuff - the Receptionist can add new args to this 62 * 63 * its used by the servlet to determine what args to save */ 64 protected GSParams params = null; 65 66 /** user id - new one per session. This doesn't work if session state is saved between restarts - this requires this value to be saved too. */ 67 protected int next_user_id = 0; 68 69 /** a hash that contains all the active session IDs mapped to the cached items 70 * It is updated whenever the whole site or a particular collection is reconfigured 71 * using the command a=s&sa=c or a=s&sa=c&c=xxx 72 * It is in the form: sid -> (UserSessionCache object) 73 */ 74 protected Hashtable session_ids_table = new Hashtable(); 75 76 /** the maximum interval that the cached info remains in session_ids_table (in seconds) 77 * This is set in web.xml 78 */ 79 protected int session_expiration = 1800; 80 81 static Logger logger = Logger.getLogger(org.greenstone.gsdl3.LibraryServlet.class.getName()); 82 83 /** initialise the servlet 84 */ 85 public void init(ServletConfig config) throws ServletException { 86 // always call super.init; 87 super.init(config); 88 // disable preferences - does this work anyway?? 89 //System.setProperty("java.util.prefs.PreferencesFactory", "org.greenstone.gsdl3.util.DisabledPreferencesFactory"); 90 91 String library_name = config.getInitParameter(GSConstants.LIBRARY_NAME); 92 String gsdl3_home = config.getInitParameter(GSConstants.GSDL3_HOME); 93 String interface_name = config.getInitParameter(GSConstants.INTERFACE_NAME); 94 95 String allowXslt = (String)config.getInitParameter(GSConstants.ALLOW_CLIENT_SIDE_XSLT); 96 supports_client_xslt = allowXslt != null && allowXslt.equals("true"); 97 98 this.default_lang = config.getInitParameter(GSConstants.DEFAULT_LANG); 99 String sess_expire = config.getInitParameter(GSXML.SESSION_EXPIRATION); 100 101 if (sess_expire != null && !sess_expire.equals("")) { 102 this.session_expiration = Integer.parseInt(sess_expire); 103 } 104 105 if (library_name == null || interface_name ==null) { 106 // must have this 107 System.err.println("initialisation parameters not all set!"); 108 System.err.println(" you must have libraryname and interfacename"); 109 System.exit(1); 110 } 111 112 String site_name = config.getInitParameter(GSConstants.SITE_NAME); 113 String remote_site_name = null; 114 String remote_site_type = null; 115 String remote_site_address = null; 116 117 if (site_name == null) { 118 // no site, try for communicator 119 remote_site_name = config.getInitParameter("remote_site_name"); 120 remote_site_type = config.getInitParameter("remote_site_type"); 121 remote_site_address = config.getInitParameter("remote_site_address"); 122 if (remote_site_name == null || remote_site_type == null || remote_site_address == null) { 123 System.err.println("initialisation paramters not all set!"); 124 System.err.println("if site_name is not set, then you must have remote_site_name, remote_site_type and remote_site_address set"); 125 System.exit(1); 126 } 127 } 128 129 if (this.default_lang == null) { 130 // choose english 131 this.default_lang = DEFAULT_LANG; 132 } 133 134 HashMap config_params = new HashMap(); 135 136 config_params.put(GSConstants.LIBRARY_NAME, library_name); 137 config_params.put(GSConstants.INTERFACE_NAME, interface_name); 138 config_params.put(GSConstants.ALLOW_CLIENT_SIDE_XSLT, supports_client_xslt); 139 140 if (site_name != null) { 141 config_params.put(GSConstants.SITE_NAME, site_name); 142 } 143 this.converter = new XMLConverter(); 144 this.doc = this.converter.newDOM(); 145 146 // the receptionist -the servlet will talk to this 147 String recept_name = (String)config.getInitParameter("receptionist_class"); 148 if (recept_name == null) { 149 this.recept = new DefaultReceptionist(); 150 } else { 151 try { 152 this.recept = (Receptionist)Class.forName("org.greenstone.gsdl3.core."+recept_name).newInstance(); 153 } catch (Exception e) { // cant use this new one, so use normal one 154 System.err.println("LibraryServlet configure exception when trying to use a new Receptionist "+recept_name+": "+e.getMessage()); 155 e.printStackTrace(); 156 this.recept = new DefaultReceptionist(); 157 } 158 } 159 this.recept.setConfigParams(config_params); 160 161 // the receptionist uses a MessageRouter or Communicator to send its requests to. We either create a MessageRouter here for the designated site (if site_name set), or we create a Communicator for a remote site. The is given to teh Receptionist, and the servlet never talks to it again.directly. 162 if (site_name != null) { 163 String mr_name = (String)config.getInitParameter("messagerouter_class"); 164 MessageRouter message_router = null; 165 if (mr_name == null) { // just use the normal MR 166 message_router = new MessageRouter(); 167 } else { // try the specified one 168 try { 169 message_router = (MessageRouter)Class.forName("org.greenstone.gsdl3.core."+mr_name).newInstance(); 170 } catch (Exception e) { // cant use this new one, so use normal one 171 System.err.println("LibraryServlet configure exception when trying to use a new MessageRouter "+mr_name+": "+e.getMessage()); 172 e.printStackTrace(); 173 message_router = new MessageRouter(); 174 } 175 } 176 177 message_router.setSiteName(site_name); 178 message_router.setLibraryName(library_name); 179 message_router.configure(); 180 this.recept.setMessageRouter(message_router); 181 } else { 182 // talking to a remote site, create a communicator 183 Communicator communicator = null; 184 // we need to create the XML to configure the communicator 185 Element site_elem = this.doc.createElement(GSXML.SITE_ELEM); 186 site_elem.setAttribute(GSXML.TYPE_ATT, remote_site_type); 187 site_elem.setAttribute(GSXML.NAME_ATT, remote_site_name); 188 site_elem.setAttribute(GSXML.ADDRESS_ATT, remote_site_address); 189 190 if (remote_site_type.equals(GSXML.COMM_TYPE_SOAP_JAVA)) { 191 communicator = new SOAPCommunicator(); 192 } else { 193 System.err.println("LibraryServlet.init Error: invalid Communicator type: "+remote_site_type); 194 System.exit(1); 195 } 196 197 if (!communicator.configure(site_elem)) { 198 System.err.println("LibraryServlet.init Error: Couldn't configure communicator"); 199 System.exit(1); 200 } 201 this.recept.setMessageRouter(communicator); 202 } 203 204 // the params arg thingy 205 206 String params_name = (String)config.getInitParameter("params_class"); 207 if (params_name == null) { 208 this.params = new GSParams(); 209 } else { 210 try { 211 this.params = (GSParams)Class.forName("org.greenstone.gsdl3.util."+params_name).newInstance(); 212 } catch (Exception e) { 213 System.err.println("LibraryServlet configure exception when trying to use a new params thing "+params_name+": "+e.getMessage()); 214 e.printStackTrace(); 215 this.params = new GSParams(); 216 } 217 } 218 // pass it to the receptionist 219 this.recept.setParams(this.params); 220 this.recept.configure(); 221 222 } 223 224 225 private void logUsageInfo(HttpServletRequest request){ 226 String usageInfo = ""; 227 228 //session-info: get params stored in the session 229 HttpSession session = request.getSession(true); 230 Enumeration attributeNames = session.getAttributeNames(); 231 while(attributeNames.hasMoreElements()) { 232 String name = (String)attributeNames.nextElement(); 233 usageInfo +=name+"="+session.getAttribute(name)+" "; 234 } 235 236 //logged info = general-info + session-info 237 usageInfo = 238 request.getServletPath()+" "+ //serlvet 239 "["+request.getQueryString()+"]" +" "+ //the query string 240 "["+usageInfo.trim()+"]" +" "+ // params stored in a session 241 request.getRemoteAddr()+" "+ //remote address 242 request.getRequestedSessionId()+" "+ //session id 243 request.getHeader("user-agent")+" "; //the remote brower info 244 245 logger.info(usageInfo); 246 247 } 248 249 public class UserSessionCache implements HttpSessionBindingListener { 250 251 String session_id = ""; 252 253 /** a hash that maps the session ID to a hashtable that maps the coll_name to its parameters 254 * coll_name -> Hashtable (param_name -> param_value) 255 */ 256 protected Hashtable coll_name_params_table = null; 257 258 public UserSessionCache(String id, Hashtable table) { 259 session_id = id; 260 coll_name_params_table = (table == null)? new Hashtable() : table; 261 } 262 263 protected void cleanupCache(String coll_name) { 264 if (coll_name_params_table.containsKey(coll_name)) { 265 coll_name_params_table.remove(coll_name); 266 } 267 } 268 269 protected Hashtable getParamsTable() { 270 return coll_name_params_table; 271 } 272 273 public void valueBound(HttpSessionBindingEvent event) { 274 // Do nothing 275 } 276 277 public void valueUnbound(HttpSessionBindingEvent event) { 278 if(session_ids_table.containsKey(session_id)) { 279 session_ids_table.remove(session_id); 280 } 281 } 282 283 public int tableSize() { 284 return (coll_name_params_table == null)? 0 : coll_name_params_table.size(); 285 } 286 287 } 288 289 public void doGet (HttpServletRequest request, HttpServletResponse response) 290 throws ServletException, IOException { 291 logUsageInfo (request); 292 293 String query_string = request.getQueryString(); 294 if (query_string!=null){ 295 String[] query_arr = StringUtils.split(query_string, "&"); 296 boolean redirect = false; 297 String href = null; 298 String rl = null; 299 String[] nameval = new String[2]; // Reuse it for memory efficiency purposes 300 301 for (int i=0;i<query_arr.length;i++){ 302 303 if (query_arr[i].startsWith("el=")){ 304 if (query_arr[i].substring(query_arr[i].indexOf("=")+1,query_arr[i].length()).equals("direct")){ 305 redirect = true; 306 } 307 }else if(query_arr[i].startsWith("href=")){ 308 href = query_arr[i].substring(query_arr[i].indexOf("=")+1,query_arr[i].length()); 309 href = StringUtils.replace(href, "%2f", "/"); 310 href = StringUtils.replace(href, "%7e", "~"); 311 href = StringUtils.replace(href, "%3f", "?"); 312 href = StringUtils.replace(href, "%3A", "\\:"); 313 }else if(query_arr[i].startsWith("rl=")){ 314 rl = query_arr[i].substring(query_arr[i].indexOf("=")+1,query_arr[i].length()); 315 } 316 } 317 318 //if query_string contains "el=", the web page will be redirected to the external URl, otherwise a greenstone page with an external URL will be displayed 319 //"rl=0" this is an external link 320 //"rl=1" this is an internal link 321 if ((redirect) && (href != null) && (rl.equals("0"))){// This is an external link, the web page is re-directed to the external URL (&el=&rl=0&href="http://...") 322 response.setContentType("text/xml"); 323 response.sendRedirect(href); 324 } 325 } 326 327 // Nested Diagnostic Configurator to identify the client for 328 HttpSession session = request.getSession (true); 329 session.setMaxInactiveInterval(session_expiration); 330 String uid = (String)session.getAttribute (GSXML.USER_ID_ATT); 331 if (uid ==null) { 332 uid = ""+getNextUserId (); 333 session.setAttribute (GSXML.USER_ID_ATT, uid); 334 } 335 request.setCharacterEncoding ("UTF-8"); 336 response.setContentType ("text/html;charset=UTF-8"); 337 PrintWriter out = response.getWriter (); 338 339 String lang = request.getParameter (GSParams.LANGUAGE); 340 if (lang==null || lang.equals ("")) { 341 // try the session cached lang 342 lang = (String)session.getAttribute (GSParams.LANGUAGE); 343 if (lang==null || lang.equals ("")) { 344 // still not set, use the default 345 lang = this.default_lang; 346 } 347 } 348 349 // set the lang in the session 350 session.setAttribute (GSParams.LANGUAGE, lang); 351 352 String output = request.getParameter (GSParams.OUTPUT); 353 if (output==null || output.equals ("")) { 354 output = "html"; // uses html by default 355 } 356 357 // If server output, force a switch to traditional interface 358 //output = (output.equals("server")) ? "html" : output; 359 360 // Force change the output mode if client-side XSLT is supported - server vs. client 361 // BUT only if the library allows client-side transforms 362 if(supports_client_xslt) { 363 // MUST be done before the xml_message is built 364 Cookie[] cookies = request.getCookies(); 365 Cookie xsltCookie = null; 366 367 // The client has cookies enabled and a value set - use it! 368 if(cookies != null) { 369 for(Cookie c : cookies) { 370 if(c.getName().equals("supportsXSLT")) { 371 xsltCookie = c; 372 break; 373 } 374 } 375 output = (xsltCookie != null && xsltCookie.getValue().equals("true") && output.equals("html")) ? "xsltclient" : output; 376 } 377 } 378 379 // the request to the receptionist 380 Element xml_message = this.doc.createElement (GSXML.MESSAGE_ELEM); 381 Element xml_request = GSXML.createBasicRequest (this.doc, GSXML.REQUEST_TYPE_PAGE, "", lang, uid); 382 xml_request.setAttribute (GSXML.OUTPUT_ATT, output); 383 384 xml_message.appendChild (xml_request); 385 386 String action = request.getParameter (GSParams.ACTION); 387 String subaction = request.getParameter (GSParams.SUBACTION); 388 String collection = request.getParameter(GSParams.COLLECTION); 389 String service = request.getParameter(GSParams.SERVICE); 390 391 // We clean up the cache session_ids_table if system 392 // commands are issued (and also don't need to do caching for this request) 393 boolean should_cache = true; 394 if(action != null && action.equals(GSParams.SYSTEM)) { 395 should_cache = false; 396 397 // we may want to remove all collection cache info, or just a specific collection 398 boolean clean_all = true; 399 String clean_collection = null; 400 // system commands are to activate/deactivate stuff 401 // collection param is in the sc parameter. 402 // don't like the fact that it is hard coded here 403 String coll = request.getParameter(GSParams.SYSTEM_CLUSTER); 404 if (coll != null && !coll.equals("")) { 405 clean_all = false; 406 clean_collection = coll; 407 } else { 408 // check other system types 409 if (subaction.equals("a") || subaction.equals("d")) { 410 String module_name = request.getParameter("sn"); 411 if (module_name != null && !module_name.equals("")) { 412 clean_all = false; 413 clean_collection = module_name; 414 } 415 } 416 } 417 if (clean_all) { 418 session_ids_table = new Hashtable(); 419 session.removeAttribute(GSXML.USER_SESSION_CACHE_ATT); 420 } else { 421 // just clean up info for clean_collection 422 ArrayList cache_list = new ArrayList(session_ids_table.values()); 423 for (int i=0; i<cache_list.size(); i++) { 424 UserSessionCache cache = (UserSessionCache)cache_list.get(i); 425 cache.cleanupCache(clean_collection); 426 } 427 428 } 429 430 } 431 432 // cache_key is the collection name, or service name 433 String cache_key = collection; 434 if (cache_key == null || cache_key.equals("")) { 435 cache_key = service; 436 } 437 438 // logger.info("should_cache= " + should_cache); 439 440 //clear the collection-specific cache in the session, since we have no way to know whether this session is 441 //about the same collection as the last session or not. 442 Enumeration attributeNames = session.getAttributeNames(); 443 while(attributeNames.hasMoreElements()) { 444 String name = (String)attributeNames.nextElement(); 445 if (!name.equals (GSXML.USER_SESSION_CACHE_ATT) 446 && !name.equals (GSParams.LANGUAGE) 447 && !name.equals (GSXML.USER_ID_ATT)) { 448 449 session.removeAttribute(name); 450 } 451 } 452 453 UserSessionCache session_cache = null; 454 Hashtable param_table = null; 455 Hashtable table = null; 456 String sid = session.getId(); 457 if (should_cache == true && cache_key != null && !cache_key.equals("")) { 458 if (session_ids_table.containsKey(sid)) { 459 session_cache = (UserSessionCache)session_ids_table.get(sid); 460 param_table = session_cache.getParamsTable(); 461 logger.info("collections in table: " + tableToString(param_table)); 462 if (param_table.containsKey(cache_key)) { 463 //logger.info("existing table: " + collection); 464 table = (Hashtable)param_table.get(cache_key); 465 } else { 466 table = new Hashtable(); 467 param_table.put(cache_key, table); 468 //logger.info("new table: " + collection); 469 } 470 } else { 471 param_table = new Hashtable(); 472 table = new Hashtable(); 473 param_table.put(cache_key, table); 474 session_cache = new UserSessionCache(sid, param_table); 475 session_ids_table.put(sid, session_cache); 476 session.setAttribute(GSXML.USER_SESSION_CACHE_ATT, session_cache); 477 //logger.info("new session id"); 478 } 479 } 480 481 if (action==null || action.equals ("")) { 482 // should we do all the following stuff if using default page? 483 // display the home page - the default page 484 xml_request.setAttribute (GSXML.ACTION_ATT, "p"); 485 xml_request.setAttribute (GSXML.SUBACTION_ATT, PageAction.HOME_PAGE); 486 } 487 else { 488 xml_request.setAttribute (GSXML.ACTION_ATT, action); 489 if (subaction != null) { 490 xml_request.setAttribute (GSXML.SUBACTION_ATT, subaction); 491 } 492 493 // create the param list for the greenstone request - includes 494 // the params from the current request and any others from the saved session 495 Element xml_param_list = this.doc.createElement (GSXML.PARAM_ELEM+GSXML.LIST_MODIFIER); 496 xml_request.appendChild (xml_param_list); 497 498 Enumeration params = request.getParameterNames (); 499 while(params.hasMoreElements ()) { 500 String name = (String)params.nextElement (); 501 if (!name.equals (GSParams.ACTION) 502 && !name.equals (GSParams.SUBACTION) 503 && !name.equals (GSParams.LANGUAGE) 504 && !name.equals (GSParams.OUTPUT)) {// we have already dealt with these 505 506 String value=""; 507 String [] values = request.getParameterValues (name); 508 value = values[0]; 509 if (values.length > 1) { 510 for (int i=1; i< values.length; i++) { 511 value += ","+values[i]; 512 } 513 } 514 // either add it to the param list straight away, or save it to the session and add it later 515 if (this.params.shouldSave (name) && table != null) { 516 table.put(name, value); 517 } else { 518 Element param = this.doc.createElement (GSXML.PARAM_ELEM); 519 param.setAttribute (GSXML.NAME_ATT, name); 520 param.setAttribute (GSXML.VALUE_ATT, GSXML.xmlSafe (value)); 521 xml_param_list.appendChild (param); 522 } 523 } 524 } 525 //put everything in the table into the session 526 // do we need to do this? why not just put from table into param list 527 if (table != null) { 528 Enumeration keys = table.keys (); 529 while(keys.hasMoreElements ()) { 530 String name = (String)keys.nextElement(); 531 session.setAttribute(name, (String)table.get(name)); 532 } 533 } 534 535 // put in all the params from the session cache 536 params = session.getAttributeNames (); 537 while(params.hasMoreElements ()) { 538 String name = (String)params.nextElement (); 539 540 if ( !name.equals (GSXML.USER_SESSION_CACHE_ATT) 541 && !name.equals (GSParams.LANGUAGE) 542 && !name.equals (GSXML.USER_ID_ATT)) { 543 544 // lang and uid are stored but we dont want it in the param list cos its already in the request 545 Element param = this.doc.createElement (GSXML.PARAM_ELEM); 546 param.setAttribute (GSXML.NAME_ATT, name); 547 String value = GSXML.xmlSafe ((String)session.getAttribute (name)); 548 549 // ugly hack to undo : escaping 550 value = StringUtils.replace(value, "%3A", "\\:"); 551 param.setAttribute (GSXML.VALUE_ATT,value); 552 xml_param_list.appendChild (param); 553 } 554 } 555 } 556 557 if (!output.equals("html") && !output.equals("server") && !output.equals("xsltclient")) { 558 response.setContentType ("text/xml"); // for now use text 559 } 560 561 //GSXML.printXMLNode(xml_message); 562 563 Node xml_result = this.recept.process(xml_message); 564 encodeURLs (xml_result, response); 565 out.println (this.converter.getPrettyString (xml_result)); 566 567 displaySize(session_ids_table); 568 569 } //end of doGet(HttpServletRequest, HttpServletResponse) 570 571 //a debugging method 572 private void displaySize(Hashtable table) { 573 if(table == null) { 574 logger.info("cached table is null"); 575 return; 576 } 577 if (table.size() == 0) { 578 logger.info("cached table size is zero"); 579 return; 580 } 581 int num_cached_coll = 0; 582 ArrayList cache_list = new ArrayList(table.values()); 583 for (int i=0; i<cache_list.size(); i++) { 584 num_cached_coll += ((UserSessionCache)cache_list.get(i)).tableSize(); 585 } 586 logger.info("Number of sessions : total number of cached collection info = " + table.size() + " : " + num_cached_coll); 587 } 588 589 /** merely a debugging method! */ 590 private String tableToString(Hashtable table) { 591 String str = ""; 592 Enumeration keys = table.keys (); 593 while(keys.hasMoreElements ()) { 594 String name = (String)keys.nextElement(); 595 str += name + ", "; 596 } 597 return str; 598 } 599 600 /** this goes through each URL and adds in a session id if needed-- 601 * its needed if the browser doesn't accept cookies 602 * also escapes things if needed 603 */ 604 protected void encodeURLs(Node dataNode, HttpServletResponse response) { 605 606 if (dataNode == null) { 607 return; 608 } 609 610 Element data =null; 611 612 short nodeType = dataNode.getNodeType(); 613 if (nodeType == Node.DOCUMENT_NODE) { 614 Document docNode = (Document)dataNode; 615 data = docNode.getDocumentElement() ; 616 } 617 else { 618 data = (Element)dataNode; 619 } 620 621 if ( data != null ) { 622 623 // get all the <a> elements 624 NodeList hrefs = data.getElementsByTagName("a"); 625 // Instead of calculating each iteration... 626 int hrefscount = hrefs.getLength(); 627 628 for (int i=0; hrefs!=null && i < hrefscount; i++) { 629 Element a = (Element)hrefs.item(i); 630 // ugly hack to get rid of : in the args - interferes with session handling 631 String href = a.getAttribute("href"); 632 if (!href.equals("")) { 633 if (href.indexOf("?")!=-1) { 634 String[] parts = StringUtils.split(href, "\\?", -1); 635 if (parts.length == 1) 636 { 637 parts[0] = StringUtils.replace(parts[0], ":", "%3A"); 638 href = "?"+parts[0]; 639 } 640 else 641 { 642 parts[1] = StringUtils.replace(parts[1], ":", "%3A"); 643 href = parts[0]+"?"+parts[1]; 644 } 645 646 } 647 a.setAttribute("href", response.encodeURL(href)); 648 } 649 } 650 651 // now find any submit bits - get all the <form> elements 652 NodeList forms = data.getElementsByTagName("form"); 653 int formscount = forms.getLength(); 654 for (int i=0; forms!=null && i < formscount; i++) { 655 Element form = (Element)forms.item(i); 656 form.setAttribute("action", response.encodeURL(form.getAttribute("action"))); 657 } 658 // are these the only cases where URLs occur?? 659 // we should only do this for greenstone urls? 660 } 661 662 } 663 664 synchronized protected int getNextUserId() { 665 next_user_id++; 666 return next_user_id; 667 } 668 669 public void doPost(HttpServletRequest request, HttpServletResponse response) 670 throws ServletException, IOException { 671 672 doGet(request,response); 673 674 } 40 41 /** the receptionist to send messages to */ 42 protected Receptionist recept=null; 43 44 /** the default language - is specified by setting a servlet param, 45 * otherwise DEFAULT_LANG is used*/ 46 protected String default_lang= null; 47 48 /** Whether or not client-side XSLT support should be exposed */ 49 protected boolean supports_client_xslt = false; 50 51 /** The default default - used if a default lang is not specified 52 * in the servlet params */ 53 protected final String DEFAULT_LANG = "en"; 54 55 /** container Document to create XML Nodes */ 56 protected Document doc=null; 57 58 /** a converter class to parse XML and create Docs */ 59 protected XMLConverter converter=null; 60 61 /** the cgi stuff - the Receptionist can add new args to this 62 * 63 * its used by the servlet to determine what args to save */ 64 protected GSParams params = null; 65 66 /** user id - new one per session. This doesn't work if session state is saved between restarts - this requires this value to be saved too. */ 67 protected int next_user_id = 0; 68 69 /** a hash that contains all the active session IDs mapped to the cached items 70 * It is updated whenever the whole site or a particular collection is reconfigured 71 * using the command a=s&sa=c or a=s&sa=c&c=xxx 72 * It is in the form: sid -> (UserSessionCache object) 73 */ 74 protected Hashtable session_ids_table = new Hashtable(); 75 76 /** the maximum interval that the cached info remains in session_ids_table (in seconds) 77 * This is set in web.xml 78 */ 79 protected int session_expiration = 1800; 80 81 static Logger logger = Logger.getLogger(org.greenstone.gsdl3.LibraryServlet.class.getName()); 82 83 /** initialise the servlet 84 */ 85 public void init(ServletConfig config) throws ServletException { 86 // always call super.init; 87 super.init(config); 88 // disable preferences - does this work anyway?? 89 //System.setProperty("java.util.prefs.PreferencesFactory", "org.greenstone.gsdl3.util.DisabledPreferencesFactory"); 90 91 String library_name = config.getInitParameter(GSConstants.LIBRARY_NAME); 92 String gsdl3_home = config.getInitParameter(GSConstants.GSDL3_HOME); 93 String interface_name = config.getInitParameter(GSConstants.INTERFACE_NAME); 94 95 String allowXslt = (String)config.getInitParameter(GSConstants.ALLOW_CLIENT_SIDE_XSLT); 96 supports_client_xslt = allowXslt != null && allowXslt.equals("true"); 97 98 this.default_lang = config.getInitParameter(GSConstants.DEFAULT_LANG); 99 String sess_expire = config.getInitParameter(GSXML.SESSION_EXPIRATION); 100 101 if (sess_expire != null && !sess_expire.equals("")) { 102 this.session_expiration = Integer.parseInt(sess_expire); 103 } 104 105 if (library_name == null || interface_name ==null) { 106 // must have this 107 System.err.println("initialisation parameters not all set!"); 108 System.err.println(" you must have libraryname and interfacename"); 109 System.exit(1); 110 } 111 112 String site_name = config.getInitParameter(GSConstants.SITE_NAME); 113 String remote_site_name = null; 114 String remote_site_type = null; 115 String remote_site_address = null; 116 117 if (site_name == null) { 118 // no site, try for communicator 119 remote_site_name = config.getInitParameter("remote_site_name"); 120 remote_site_type = config.getInitParameter("remote_site_type"); 121 remote_site_address = config.getInitParameter("remote_site_address"); 122 if (remote_site_name == null || remote_site_type == null || remote_site_address == null) { 123 System.err.println("initialisation paramters not all set!"); 124 System.err.println("if site_name is not set, then you must have remote_site_name, remote_site_type and remote_site_address set"); 125 System.exit(1); 126 } 127 } 128 129 if (this.default_lang == null) { 130 // choose english 131 this.default_lang = DEFAULT_LANG; 132 } 133 134 HashMap config_params = new HashMap(); 135 136 config_params.put(GSConstants.LIBRARY_NAME, library_name); 137 config_params.put(GSConstants.INTERFACE_NAME, interface_name); 138 config_params.put(GSConstants.ALLOW_CLIENT_SIDE_XSLT, supports_client_xslt); 139 140 if (site_name != null) { 141 config_params.put(GSConstants.SITE_NAME, site_name); 142 } 143 this.converter = new XMLConverter(); 144 this.doc = this.converter.newDOM(); 145 146 // the receptionist -the servlet will talk to this 147 String recept_name = (String)config.getInitParameter("receptionist_class"); 148 if (recept_name == null) { 149 this.recept = new DefaultReceptionist(); 150 } else { 151 try { 152 this.recept = (Receptionist)Class.forName("org.greenstone.gsdl3.core."+recept_name).newInstance(); 153 } catch (Exception e) { // cant use this new one, so use normal one 154 System.err.println("LibraryServlet configure exception when trying to use a new Receptionist "+recept_name+": "+e.getMessage()); 155 e.printStackTrace(); 156 this.recept = new DefaultReceptionist(); 157 } 158 } 159 this.recept.setConfigParams(config_params); 160 161 // the receptionist uses a MessageRouter or Communicator to send its requests to. We either create a MessageRouter here for the designated site (if site_name set), or we create a Communicator for a remote site. The is given to teh Receptionist, and the servlet never talks to it again.directly. 162 if (site_name != null) { 163 String mr_name = (String)config.getInitParameter("messagerouter_class"); 164 MessageRouter message_router = null; 165 if (mr_name == null) { // just use the normal MR 166 message_router = new MessageRouter(); 167 } else { // try the specified one 168 try { 169 message_router = (MessageRouter)Class.forName("org.greenstone.gsdl3.core."+mr_name).newInstance(); 170 } catch (Exception e) { // cant use this new one, so use normal one 171 System.err.println("LibraryServlet configure exception when trying to use a new MessageRouter "+mr_name+": "+e.getMessage()); 172 e.printStackTrace(); 173 message_router = new MessageRouter(); 174 } 175 } 176 177 message_router.setSiteName(site_name); 178 message_router.setLibraryName(library_name); 179 message_router.configure(); 180 this.recept.setMessageRouter(message_router); 181 } else { 182 // talking to a remote site, create a communicator 183 Communicator communicator = null; 184 // we need to create the XML to configure the communicator 185 Element site_elem = this.doc.createElement(GSXML.SITE_ELEM); 186 site_elem.setAttribute(GSXML.TYPE_ATT, remote_site_type); 187 site_elem.setAttribute(GSXML.NAME_ATT, remote_site_name); 188 site_elem.setAttribute(GSXML.ADDRESS_ATT, remote_site_address); 189 190 if (remote_site_type.equals(GSXML.COMM_TYPE_SOAP_JAVA)) { 191 communicator = new SOAPCommunicator(); 192 } else { 193 System.err.println("LibraryServlet.init Error: invalid Communicator type: "+remote_site_type); 194 System.exit(1); 195 } 196 197 if (!communicator.configure(site_elem)) { 198 System.err.println("LibraryServlet.init Error: Couldn't configure communicator"); 199 System.exit(1); 200 } 201 this.recept.setMessageRouter(communicator); 202 } 203 204 // the params arg thingy 205 206 String params_name = (String)config.getInitParameter("params_class"); 207 if (params_name == null) { 208 this.params = new GSParams(); 209 } else { 210 try { 211 this.params = (GSParams)Class.forName("org.greenstone.gsdl3.util."+params_name).newInstance(); 212 } catch (Exception e) { 213 System.err.println("LibraryServlet configure exception when trying to use a new params thing "+params_name+": "+e.getMessage()); 214 e.printStackTrace(); 215 this.params = new GSParams(); 216 } 217 } 218 // pass it to the receptionist 219 this.recept.setParams(this.params); 220 this.recept.configure(); 221 222 } 223 224 225 private void logUsageInfo(HttpServletRequest request){ 226 String usageInfo = ""; 227 228 //session-info: get params stored in the session 229 HttpSession session = request.getSession(true); 230 Enumeration attributeNames = session.getAttributeNames(); 231 while(attributeNames.hasMoreElements()) { 232 String name = (String)attributeNames.nextElement(); 233 usageInfo +=name+"="+session.getAttribute(name)+" "; 234 } 235 236 //logged info = general-info + session-info 237 usageInfo = 238 request.getServletPath()+" "+ //serlvet 239 "["+request.getQueryString()+"]" +" "+ //the query string 240 "["+usageInfo.trim()+"]" +" "+ // params stored in a session 241 request.getRemoteAddr()+" "+ //remote address 242 request.getRequestedSessionId()+" "+ //session id 243 request.getHeader("user-agent")+" "; //the remote brower info 244 245 logger.info(usageInfo); 246 247 } 248 249 public class UserSessionCache implements HttpSessionBindingListener { 250 251 String session_id = ""; 252 253 /** a hash that maps the session ID to a hashtable that maps the coll_name to its parameters 254 * coll_name -> Hashtable (param_name -> param_value) 255 */ 256 protected Hashtable coll_name_params_table = null; 257 258 public UserSessionCache(String id, Hashtable table) { 259 session_id = id; 260 coll_name_params_table = (table == null)? new Hashtable() : table; 261 } 262 263 protected void cleanupCache(String coll_name) { 264 if (coll_name_params_table.containsKey(coll_name)) { 265 coll_name_params_table.remove(coll_name); 266 } 267 } 268 269 protected Hashtable getParamsTable() { 270 return coll_name_params_table; 271 } 272 273 public void valueBound(HttpSessionBindingEvent event) { 274 // Do nothing 275 } 276 277 public void valueUnbound(HttpSessionBindingEvent event) { 278 if(session_ids_table.containsKey(session_id)) { 279 session_ids_table.remove(session_id); 280 } 281 } 282 283 public int tableSize() { 284 return (coll_name_params_table == null)? 0 : coll_name_params_table.size(); 285 } 286 287 } 288 289 public void doGet (HttpServletRequest request, HttpServletResponse response) 290 throws ServletException, IOException { 291 logUsageInfo (request); 292 293 String query_string = request.getQueryString(); 294 if (query_string!=null){ 295 String[] query_arr = StringUtils.split(query_string, "&"); 296 boolean redirect = false; 297 String href = null; 298 String rl = null; 299 String[] nameval = new String[2]; // Reuse it for memory efficiency purposes 300 301 for (int i=0;i<query_arr.length;i++){ 302 303 if (query_arr[i].startsWith("el=")){ 304 if (query_arr[i].substring(query_arr[i].indexOf("=")+1,query_arr[i].length()).equals("direct")){ 305 redirect = true; 306 } 307 }else if(query_arr[i].startsWith("href=")){ 308 href = query_arr[i].substring(query_arr[i].indexOf("=")+1,query_arr[i].length()); 309 href = StringUtils.replace(href, "%2f", "/"); 310 href = StringUtils.replace(href, "%7e", "~"); 311 href = StringUtils.replace(href, "%3f", "?"); 312 href = StringUtils.replace(href, "%3A", "\\:"); 313 }else if(query_arr[i].startsWith("rl=")){ 314 rl = query_arr[i].substring(query_arr[i].indexOf("=")+1,query_arr[i].length()); 315 } 316 } 317 318 //if query_string contains "el=", the web page will be redirected to the external URl, otherwise a greenstone page with an external URL will be displayed 319 //"rl=0" this is an external link 320 //"rl=1" this is an internal link 321 if ((redirect) && (href != null) && (rl.equals("0"))){// This is an external link, the web page is re-directed to the external URL (&el=&rl=0&href="http://...") 322 response.setContentType("text/xml"); 323 response.sendRedirect(href); 324 } 325 } 326 327 // Nested Diagnostic Configurator to identify the client for 328 HttpSession session = request.getSession (true); 329 session.setMaxInactiveInterval(session_expiration); 330 String uid = (String)session.getAttribute (GSXML.USER_ID_ATT); 331 if (uid ==null) { 332 uid = ""+getNextUserId (); 333 session.setAttribute (GSXML.USER_ID_ATT, uid); 334 } 335 request.setCharacterEncoding ("UTF-8"); 336 response.setContentType ("text/html;charset=UTF-8"); 337 PrintWriter out = response.getWriter (); 338 339 String lang = request.getParameter (GSParams.LANGUAGE); 340 if (lang==null || lang.equals ("")) { 341 // try the session cached lang 342 lang = (String)session.getAttribute (GSParams.LANGUAGE); 343 if (lang==null || lang.equals ("")) { 344 // still not set, use the default 345 lang = this.default_lang; 346 } 347 } 348 349 // set the lang in the session 350 session.setAttribute (GSParams.LANGUAGE, lang); 351 352 String output = request.getParameter (GSParams.OUTPUT); 353 if (output==null || output.equals ("")) { 354 output = "html"; // uses html by default 355 } 356 357 // If server output, force a switch to traditional interface 358 //output = (output.equals("server")) ? "html" : output; 359 360 // Force change the output mode if client-side XSLT is supported - server vs. client 361 // BUT only if the library allows client-side transforms 362 if(supports_client_xslt) { 363 // MUST be done before the xml_message is built 364 Cookie[] cookies = request.getCookies(); 365 Cookie xsltCookie = null; 366 367 // The client has cookies enabled and a value set - use it! 368 if(cookies != null) { 369 for(Cookie c : cookies) { 370 if(c.getName().equals("supportsXSLT")) { 371 xsltCookie = c; 372 break; 373 } 374 } 375 output = (xsltCookie != null && xsltCookie.getValue().equals("true") && output.equals("html")) ? "xsltclient" : output; 376 } 377 } 378 379 // the request to the receptionist 380 Element xml_message = this.doc.createElement (GSXML.MESSAGE_ELEM); 381 Element xml_request = GSXML.createBasicRequest (this.doc, GSXML.REQUEST_TYPE_PAGE, "", lang, uid); 382 xml_request.setAttribute (GSXML.OUTPUT_ATT, output); 383 384 xml_message.appendChild (xml_request); 385 386 String action = request.getParameter (GSParams.ACTION); 387 String subaction = request.getParameter (GSParams.SUBACTION); 388 String collection = request.getParameter(GSParams.COLLECTION); 389 String service = request.getParameter(GSParams.SERVICE); 390 391 // We clean up the cache session_ids_table if system 392 // commands are issued (and also don't need to do caching for this request) 393 boolean should_cache = true; 394 if(action != null && action.equals(GSParams.SYSTEM)) { 395 should_cache = false; 396 397 // we may want to remove all collection cache info, or just a specific collection 398 boolean clean_all = true; 399 String clean_collection = null; 400 // system commands are to activate/deactivate stuff 401 // collection param is in the sc parameter. 402 // don't like the fact that it is hard coded here 403 String coll = request.getParameter(GSParams.SYSTEM_CLUSTER); 404 if (coll != null && !coll.equals("")) { 405 clean_all = false; 406 clean_collection = coll; 407 } else { 408 // check other system types 409 if (subaction.equals("a") || subaction.equals("d")) { 410 String module_name = request.getParameter("sn"); 411 if (module_name != null && !module_name.equals("")) { 412 clean_all = false; 413 clean_collection = module_name; 414 } 415 } 416 } 417 if (clean_all) { 418 session_ids_table = new Hashtable(); 419 session.removeAttribute(GSXML.USER_SESSION_CACHE_ATT); 420 } else { 421 // just clean up info for clean_collection 422 ArrayList cache_list = new ArrayList(session_ids_table.values()); 423 for (int i=0; i<cache_list.size(); i++) { 424 UserSessionCache cache = (UserSessionCache)cache_list.get(i); 425 cache.cleanupCache(clean_collection); 426 } 427 428 } 429 430 } 431 432 // cache_key is the collection name, or service name 433 String cache_key = collection; 434 if (cache_key == null || cache_key.equals("")) { 435 cache_key = service; 436 } 437 438 // logger.info("should_cache= " + should_cache); 439 440 //clear the collection-specific cache in the session, since we have no way to know whether this session is 441 //about the same collection as the last session or not. 442 Enumeration attributeNames = session.getAttributeNames(); 443 while(attributeNames.hasMoreElements()) { 444 String name = (String)attributeNames.nextElement(); 445 if (!name.equals (GSXML.USER_SESSION_CACHE_ATT) 446 && !name.equals (GSParams.LANGUAGE) 447 && !name.equals (GSXML.USER_ID_ATT)) { 448 449 session.removeAttribute(name); 450 } 451 } 452 453 UserSessionCache session_cache = null; 454 Hashtable param_table = null; 455 Hashtable table = null; 456 String sid = session.getId(); 457 if (should_cache == true && cache_key != null && !cache_key.equals("")) { 458 if (session_ids_table.containsKey(sid)) { 459 session_cache = (UserSessionCache)session_ids_table.get(sid); 460 param_table = session_cache.getParamsTable(); 461 logger.info("collections in table: " + tableToString(param_table)); 462 if (param_table.containsKey(cache_key)) { 463 //logger.info("existing table: " + collection); 464 table = (Hashtable)param_table.get(cache_key); 465 } else { 466 table = new Hashtable(); 467 param_table.put(cache_key, table); 468 //logger.info("new table: " + collection); 469 } 470 } else { 471 param_table = new Hashtable(); 472 table = new Hashtable(); 473 param_table.put(cache_key, table); 474 session_cache = new UserSessionCache(sid, param_table); 475 session_ids_table.put(sid, session_cache); 476 session.setAttribute(GSXML.USER_SESSION_CACHE_ATT, session_cache); 477 //logger.info("new session id"); 478 } 479 } 480 481 if (action==null || action.equals ("")) { 482 // should we do all the following stuff if using default page? 483 // display the home page - the default page 484 xml_request.setAttribute (GSXML.ACTION_ATT, "p"); 485 xml_request.setAttribute (GSXML.SUBACTION_ATT, PageAction.HOME_PAGE); 486 } 487 else { 488 xml_request.setAttribute (GSXML.ACTION_ATT, action); 489 if (subaction != null) { 490 xml_request.setAttribute (GSXML.SUBACTION_ATT, subaction); 491 } 492 493 // create the param list for the greenstone request - includes 494 // the params from the current request and any others from the saved session 495 Element xml_param_list = this.doc.createElement (GSXML.PARAM_ELEM+GSXML.LIST_MODIFIER); 496 xml_request.appendChild (xml_param_list); 497 498 Enumeration params = request.getParameterNames (); 499 while(params.hasMoreElements ()) { 500 String name = (String)params.nextElement (); 501 if (!name.equals (GSParams.ACTION) 502 && !name.equals (GSParams.SUBACTION) 503 && !name.equals (GSParams.LANGUAGE) 504 && !name.equals (GSParams.OUTPUT)) {// we have already dealt with these 505 506 String value=""; 507 String [] values = request.getParameterValues (name); 508 value = values[0]; 509 if (values.length > 1) { 510 for (int i=1; i< values.length; i++) { 511 value += ","+values[i]; 512 } 513 } 514 // either add it to the param list straight away, or save it to the session and add it later 515 if (this.params.shouldSave (name) && table != null) { 516 table.put(name, value); 517 } else { 518 Element param = this.doc.createElement (GSXML.PARAM_ELEM); 519 param.setAttribute (GSXML.NAME_ATT, name); 520 param.setAttribute (GSXML.VALUE_ATT, GSXML.xmlSafe (value)); 521 xml_param_list.appendChild (param); 522 } 523 } 524 } 525 //put everything in the table into the session 526 // do we need to do this? why not just put from table into param list 527 if (table != null) { 528 Enumeration keys = table.keys (); 529 while(keys.hasMoreElements ()) { 530 String name = (String)keys.nextElement(); 531 session.setAttribute(name, (String)table.get(name)); 532 } 533 } 534 535 // put in all the params from the session cache 536 params = session.getAttributeNames (); 537 while(params.hasMoreElements ()) { 538 String name = (String)params.nextElement (); 539 540 if ( !name.equals (GSXML.USER_SESSION_CACHE_ATT) 541 && !name.equals (GSParams.LANGUAGE) 542 && !name.equals (GSXML.USER_ID_ATT)) { 543 544 // lang and uid are stored but we dont want it in the param list cos its already in the request 545 Element param = this.doc.createElement (GSXML.PARAM_ELEM); 546 param.setAttribute (GSXML.NAME_ATT, name); 547 String value = GSXML.xmlSafe ((String)session.getAttribute (name)); 548 549 // ugly hack to undo : escaping 550 value = StringUtils.replace(value, "%3A", "\\:"); 551 param.setAttribute (GSXML.VALUE_ATT,value); 552 xml_param_list.appendChild (param); 553 } 554 } 555 } 556 557 if (!output.equals("html") && !output.equals("server") && !output.equals("xsltclient")) { 558 response.setContentType ("text/xml"); // for now use text 559 } 560 561 //Add custom HTTP headers if requested 562 String httpHeaders = StringEscapeUtils.unescapeHtml4(request.getParameter(GSParams.HTTPHEADERFIELDS)); 563 if (httpHeaders!=null && !httpHeaders.equals ("")) { 564 String[] headerParams = StringUtils.split(httpHeaders, "&"); 565 566 for(int j = 0; j < headerParams.length; j++) 567 { 568 int index = StringUtils.indexOf(headerParams[j], "="); 569 570 if(index != -1) 571 { 572 response.setHeader(StringUtils.substring(headerParams[j], 0, index), StringUtils.substring(headerParams[j], index+1)); 573 } 574 } 575 576 } 577 578 //GSXML.printXMLNode(xml_message); 579 Node xml_result = this.recept.process(xml_message); 580 encodeURLs (xml_result, response); 581 out.println (this.converter.getPrettyString (xml_result)); 582 583 displaySize(session_ids_table); 584 585 } //end of doGet(HttpServletRequest, HttpServletResponse) 586 587 //a debugging method 588 private void displaySize(Hashtable table) { 589 if(table == null) { 590 logger.info("cached table is null"); 591 return; 592 } 593 if (table.size() == 0) { 594 logger.info("cached table size is zero"); 595 return; 596 } 597 int num_cached_coll = 0; 598 ArrayList cache_list = new ArrayList(table.values()); 599 for (int i=0; i<cache_list.size(); i++) { 600 num_cached_coll += ((UserSessionCache)cache_list.get(i)).tableSize(); 601 } 602 logger.info("Number of sessions : total number of cached collection info = " + table.size() + " : " + num_cached_coll); 603 } 604 605 /** merely a debugging method! */ 606 private String tableToString(Hashtable table) { 607 String str = ""; 608 Enumeration keys = table.keys (); 609 while(keys.hasMoreElements ()) { 610 String name = (String)keys.nextElement(); 611 str += name + ", "; 612 } 613 return str; 614 } 615 616 /** this goes through each URL and adds in a session id if needed-- 617 * its needed if the browser doesn't accept cookies 618 * also escapes things if needed 619 */ 620 protected void encodeURLs(Node dataNode, HttpServletResponse response) { 621 622 if (dataNode == null) { 623 return; 624 } 625 626 Element data =null; 627 628 short nodeType = dataNode.getNodeType(); 629 if (nodeType == Node.DOCUMENT_NODE) { 630 Document docNode = (Document)dataNode; 631 data = docNode.getDocumentElement() ; 632 } 633 else { 634 data = (Element)dataNode; 635 } 636 637 if ( data != null ) { 638 639 // get all the <a> elements 640 NodeList hrefs = data.getElementsByTagName("a"); 641 // Instead of calculating each iteration... 642 int hrefscount = hrefs.getLength(); 643 644 for (int i=0; hrefs!=null && i < hrefscount; i++) { 645 Element a = (Element)hrefs.item(i); 646 // ugly hack to get rid of : in the args - interferes with session handling 647 String href = a.getAttribute("href"); 648 if (!href.equals("")) { 649 if (href.indexOf("?")!=-1) { 650 String[] parts = StringUtils.split(href, "\\?", -1); 651 if (parts.length == 1) 652 { 653 parts[0] = StringUtils.replace(parts[0], ":", "%3A"); 654 href = "?"+parts[0]; 655 } 656 else 657 { 658 parts[1] = StringUtils.replace(parts[1], ":", "%3A"); 659 href = parts[0]+"?"+parts[1]; 660 } 661 662 } 663 a.setAttribute("href", response.encodeURL(href)); 664 } 665 } 666 667 // now find any submit bits - get all the <form> elements 668 NodeList forms = data.getElementsByTagName("form"); 669 int formscount = forms.getLength(); 670 for (int i=0; forms!=null && i < formscount; i++) { 671 Element form = (Element)forms.item(i); 672 form.setAttribute("action", response.encodeURL(form.getAttribute("action"))); 673 } 674 // are these the only cases where URLs occur?? 675 // we should only do this for greenstone urls? 676 } 677 678 } 679 680 synchronized protected int getNextUserId() { 681 next_user_id++; 682 return next_user_id; 683 } 684 685 public void doPost(HttpServletRequest request, HttpServletResponse response) 686 throws ServletException, IOException { 687 688 doGet(request,response); 689 690 } 675 691 676 692 } -
main/trunk/greenstone3/src/java/org/greenstone/gsdl3/util/GSParams.java
r23968 r24019 29 29 public static final String RESPONSE_ONLY = "ro"; // if == 1 do the request and pass back the response xml - no page formatting 30 30 public static final String OUTPUT = "o"; // if processing is to be done, what type of output - html/xml/other?? 31 public static final String HTTPHEADERFIELDS = "hhf"; 31 32 public static final String SERVICE = "s"; // the name of the service 32 33 public static final String CLUSTER = "c"; // these two are the same
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