problems with ajaxError catching all exceptions solved

[pazpar2-moved-to-github.git] / js / pz2.js

diff --git a/js/pz2.js b/js/pz2.js
index 9d1e294..9136654 100644 (file)
--- a/js/pz2.js
+++ b/js/pz2.js
@@ -1,5 +1,5 @@
 /*
-** $Id: pz2.js,v 1.4 2007-03-28 15:20:53 jakub Exp $
+** $Id: pz2.js,v 1.11 2007-04-20 13:56:20 jakub Exp $
 ** pz2.js - pazpar2's javascript client library.
 */
 
@@ -33,7 +33,11 @@ var pz2 = function(paramArray) {
 
     // at least one callback required
     if ( !paramArray )
-        throw new Error("An array with parameters has to be suplied when instantiating a class");   
+        throw new Error("An array with parameters has to be suplied when instantiating a class");
+
+    //supported pazpar2's protocol version
+    __myself.suppProtoVer = '1';
+    __myself.errorHandler = paramArray.errorhandler || null;
     
     // function callbacks
     __myself.statCallback = paramArray.onstat || null;
@@ -71,22 +75,49 @@ var pz2 = function(paramArray) {
     //timers
     __myself.statTime = paramArray.stattime || 2000;
     __myself.statTimer = null;
-    __myself.termTime = paramArray.termtime || 2000;
+    __myself.termTime = paramArray.termtime || 1000;
     __myself.termTimer = null;
-    __myself.showTime = paramArray.showtime || 2000;
+    __myself.showTime = paramArray.showtime || 1000;
     __myself.showTimer = null;
+    __myself.showFastCount = 4;
     __myself.bytargetTime = paramArray.bytargettime || 1000;
     __myself.bytargetTimer = null;
 
+    //useful?
+    __myself.dumpFactor = 500;
+    __myself.showCounter = 0;
+    __myself.termCounter = 0;
+
     // active clients, updated by stat and show
     // might be an issue since bytarget will poll accordingly
     __myself.activeClients = 1;
 
     // error handling
     $(document).ajaxError( 
-    function (request, settings, exception) {
-        if ( settings.responseXML && settings.responseXML.getElementsByTagName("error") )
-            throw new Error( settings.responseXML.getElementsByTagName("error")[0].childNodes[0].nodeValue);
+    function (ajaxError, xhr, reqSettings, prevException)
+    {
+        if ( xhr.responseXML && xhr.responseXML.getElementsByTagName("error").length )
+       {
+           var errMsg = xhr.responseXML.getElementsByTagName("error")[0].childNodes[0].nodeValue;
+            var errCode = xhr.responseXML.getElementsByTagName("error")[0].getAttribute("code");
+            
+            var err = new Error(errMsg);
+            err.code = errCode;
+           
+            if (__myself.errorHandler) {
+                __myself.errorHandler(err);
+            }
+            else {
+                throw err;
+            }
+       }
+        // ensure the errors are propagated
+       else if (prevException != undefined ) {
+           throw prevException;
+        }
+        else {
+                throw new Error("XMLHttpRequest error. STATUS: " + xhr.status + " STATUS TEXT: " + xhr.statusText);
+        }
     });
     
     // auto init session?
@@ -97,12 +128,14 @@ pz2.prototype = {
     init: function(keepAlive) 
     {
         if ( keepAlive < __myself.keepAlive )
-            __myself.keepAlive = keepAlive;  
+            __myself.keepAlive = keepAlive;
         
         $.get( __myself.pz2String,
             { "command": "init" },
             function(data) {
                 if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
+                    if ( data.getElementsByTagName("protocol")[0].childNodes[0].nodeValue != __myself.suppProtoVer )
+                        throw new Error("Server's protocol not supported by the client");
                     __myself.initStatusOK = true;
                     __myself.sessionID = data.getElementsByTagName("session")[0].childNodes[0].nodeValue;
                     setTimeout(__myself.ping, __myself.keepAlive);
@@ -141,7 +174,10 @@ pz2.prototype = {
         clearTimeout(__myself.showTimer);
         clearTimeout(__myself.termTimer);
         clearTimeout(__myself.bytargetTimer);
-
+        
+        __myself.showCounter = 0;
+        __myself.termCounter = 0;
+        
         if( !__myself.initStatusOK )
             return;
         
@@ -165,8 +201,8 @@ pz2.prototype = {
                     if ( __myself.statCallback )
                         __myself.statTimer = setTimeout("__myself.stat()", __myself.statTime / 2);
                     if ( __myself.termlistCallback )
-                        __myself.termlist();
-                        //__myself.termTimer = setTimeout("__myself.termlist()", __myself.termTime / 2);
+                        //__myself.termlist();
+                        __myself.termTimer = setTimeout("__myself.termlist()", __myself.termTime / 2);
                     if ( __myself.bytargetCallback )
                         __myself.bytargetTimer = setTimeout("__myself.bytarget()", __myself.bytargetTime / 2);
                 }
@@ -248,17 +284,33 @@ pz2.prototype = {
                     var hit = new Array();
                     for (i = 0; i < hits.length; i++) {
                         show.hits[i] = new Array();
+                       show.hits[i]['location'] = new Array();
                         for ( j = 0; j < hits[i].childNodes.length; j++) {
+                           var locCount = 0;
                             if ( hits[i].childNodes[j].nodeType == Node.ELEMENT_NODE ) {
-                                var nodeName = hits[i].childNodes[j].nodeName;
-                                var nodeText = hits[i].childNodes[j].firstChild.nodeValue;
-                                show.hits[i][nodeName] = nodeText;
+                               if (hits[i].childNodes[j].nodeName == 'location') {
+                                   var locNode = hits[i].childNodes[j];
+                                   var id = locNode.getAttribute('id');
+                                   show.hits[i]['location'][id] = {
+                                       "id": locNode.getAttribute("id"),
+                                       "name": locNode.getAttribute("name")
+                                   };
+                               }
+                               else {
+                                   var nodeName = hits[i].childNodes[j].nodeName;
+                                    var nodeText = hits[i].childNodes[j].firstChild.nodeValue;
+                                   show.hits[i][nodeName] = nodeText;
+                               }
                             }
                         }
                     }
                     __myself.showCallback(show);
+                    __myself.showCounter++;
+                   var delay = __myself.showTime;
+                   if (__myself.showCounter > __myself.showFastCount)
+                           delay *= 2;
                     if (activeClients > 0)
-                        __myself.showTimer = setTimeout("__myself.show()", __myself.showTime);
+                        __myself.showTimer = setTimeout("__myself.show()", delay);
                 }
                 else
                     // if it gets here the http return code was 200 (pz2 errors are 417)
@@ -299,7 +351,11 @@ pz2.prototype = {
                         for ( j = 0; j < locationNodes[i].childNodes.length; j++) {
                             if ( locationNodes[i].childNodes[j].nodeType == Node.ELEMENT_NODE ) {
                                 var nodeName = locationNodes[i].childNodes[j].nodeName;
-                                var nodeText = locationNodes[i].childNodes[j].firstChild.nodeValue;
+                                var nodeText;
+                               if (locationNodes[i].childNodes[j].firstChild)
+                                       nodeText = locationNodes[i].childNodes[j].firstChild.nodeValue;
+                               else
+                                       nodeText = '';
                                 record["location"][i][nodeName] = nodeText;                            
                             }
                         }
@@ -345,9 +401,11 @@ pz2.prototype = {
                             termList[listName][j] = term;
                         }
                     }
+
                     __myself.termlistCallback(termList);
+                    __myself.termCounter++;
                     if (termList["activeclients"] > 0)
-                        __myself.termTimer = setTimeout("__myself.termlist()", __myself.termTime); 
+                        __myself.termTimer = setTimeout("__myself.termlist()", (__myself.termTime + __myself.termCounter*__myself.dumpFactor)); 
                 }
                 else
                     // if it gets here the http return code was 200 (pz2 errors are 417)