Changeset 3346

Timestamp:

2002-08-12T09:53:13+12:00 (22 years ago)

Author:

kjdon

Message:

does a proper job now

File:

• trunk/gsdl3/src/java/org/greenstone/gsdl3/LibraryServlet.java (modified) (2 diffs)

trunk/gsdl3/src/java/org/greenstone/gsdl3/LibraryServlet.java

@@ -7 +7 @@
 import javax.servlet.*;
 import javax.servlet.http.*;
+import java.util.Enumeration;
+import java.io.File;
 
 /** a servlet to serve the greenstone library - using servlets instead
  * of cgi
+ * the init method is called only once - the first time the servlet classes
+ * are loaded. Each time a request comes in to the servlet, the session()
+ * method is called in a new thread (calls doGet/doPut etc)
+ * takes the a=p&p=home type args and builds a simple request to send to 
+ * its receptionist, which returns the result in html, cos output=html
+ * is set in the request
+ * @see Receptionist
  */
 public class LibraryServlet extends HttpServlet {
     
-    private String gsdl_home_;
-    private String site_home_;
-    private MessageRouter mr_=null;
-
+    private ConfigVars config_=null; // holds all teh system set up vars
+    private Receptionist recept_=null;
+    private ModuleInterface message_router_=null;
+    /** initialise the servlet
+     */
     public void init(ServletConfig config) throws ServletException {
     // always call super.init;
     super.init(config);
-    gsdl_home_ = config.getInitParameter("gsdlhome");
-    if (gsdl_home_ == null) {
+
+    config_ = new ConfigVars();
+    String sites_home_ = config.getInitParameter("siteshome");
+    String site_name_ = config.getInitParameter("sitename");
+    String interfaces_home_ = config.getInitParameter("interfaceshome");
+    String interface_name_ = config.getInitParameter("interfacename");
+    if (sites_home_ == null || site_name_==null || interfaces_home_ ==null || interface_name_==null) {
         // must have this
-        System.err.println("gsdlhome not set!");
-        System.exit(1);
-    }
-    site_home_ = config.getInitParameter("sitehome");
-    if (site_home_ == null) {
-        // must have this
-        System.err.println("sitehome not set!");
+        System.err.println("initialisation parameters not all set!");
+        System.err.println(" you must have siteshome, sitename, interfaceshome, interfacename");
         System.exit(1);
     }
 
-    // new message router
-    mr_ = new MessageRouter();
-    mr_.setSiteHome(site_home_);
-    mr_.configure();
+    config_.sites_home_ = sites_home_;
+    config_.site_name_ = site_name_;
+    config_.interfaces_home_ = interfaces_home_;
+    config_.interface_name_ =interface_name_;
+
+    config_.createXML();
+    
+    // new message router - create it and pass a handle to recept.
+    // the servlet wont use this directly
+    MessageRouter mr = new MessageRouter();
+    mr.setSiteHome(config_.sites_home_+File.separatorChar
+               +config_.site_name_);
+    mr.configure();
+    // new receptionist
+    recept_ = new Receptionist();
+    recept_.setConfigVars(config_);
+    recept_.setMessageRouter(mr);
+    recept_.configure();
 
     }
@@ -46 +70 @@
     response.setContentType("text/html");
     PrintWriter out = response.getWriter();
-    
+
+    String lang = request.getParameter("l");
+    if (lang==null || lang.equals("")) {
+        lang = "en"; // the default
+    }
+    // the request to the receptionist  
+    String xml_request="<message lang='"+lang+"'>";
+
     String action = request.getParameter("a");
     if (action==null || action.equals("")) {
-        // the home page
-        
-        //String describe = "<message><request type='describe' info='collectionList'/></message>";
-        //String result = mr_.process(describe);
-        
+        // display the home page
+        // a=p&p=home
+        xml_request +="<request type='action' output='html' info='p/home'/>";
+    } else {
+        String subaction = request.getParameter("sa");
+        xml_request += "<request type='action' info='"+action;
+        if (subaction != null) {
+        xml_request += "/"+subaction;
+        }
+        xml_request += "'><paramList>";
+        Enumeration params = request.getParameterNames();
+        while(params.hasMoreElements()) {
+        String name = (String)params.nextElement();
+        if (!name.equals("a") && !name.equals("sa")) {
+            String value = request.getParameter(name);
+        // for now, just add value as attribute - should un-url 
+            // encode them etc and so some might need to be text not atts
+            // or is that done already?
+            xml_request += "<param name='"+name+"' value='"+value+"'/>";
+        }
+        }
+        xml_request += "</paramList></request>";
+    }
+    xml_request += "</message>";
 
-        //try a transform - hard coded result to test the stylesheet
-        String result = "<message><collectionList><collection name='mycol'><metadata name='icon'>logo.gif</metadata><metadata name='title'>my collection</metadata></collection><collection name='demo'><metadata name='icon'>fao.gif</metadata><metadata name='title'>mg demo</metadata></collection><collection name='mgppdemo'><metadata name='icon'>demo.gif</metadata><metadata name='title'>mgpp demo</metadata></collection></collectionList></message>";
+    System.out.println("request="+xml_request);
 
-        XMLTransformer transformer = new XMLTransformer();
-        String stylesheet = "/research/kjdon/home/gsdl3/transform/home.xsl";
-        String transformed_result = transformer.transform(stylesheet, result);
-        out.println(transformed_result);
-    }
-    else {
-        // do the appropriate action
-        out.println("<html>\n"+
-            "<head><title>Hello Greenstone Library</title></head>"+
-            "<body>\n"+
-            "<p>greenstone action:"+action+"</p>\n"+
-            "</body></html>");
-            
-    }
+    String result = recept_.process(xml_request);
+    out.println(result);
+
+
     
     }