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 5870bae..9136654 100644 (file)
--- a/js/pz2.js
+++ b/js/pz2.js
@@ -1,5 +1,5 @@
 /*
-** $Id: pz2.js,v 1.7 2007-04-15 03:24:18 quinn 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;
@@ -75,6 +79,7 @@ var pz2 = function(paramArray) {
     __myself.termTimer = null;
     __myself.showTime = paramArray.showtime || 1000;
     __myself.showTimer = null;
+    __myself.showFastCount = 4;
     __myself.bytargetTime = paramArray.bytargettime || 1000;
     __myself.bytargetTimer = null;
 
@@ -89,9 +94,30 @@ var pz2 = function(paramArray) {
 
     // 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?
@@ -102,12 +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);
@@ -270,7 +298,7 @@ pz2.prototype = {
                                }
                                else {
                                    var nodeName = hits[i].childNodes[j].nodeName;
-                                   var nodeText = hits[i].childNodes[j].firstChild.nodeValue;
+                                    var nodeText = hits[i].childNodes[j].firstChild.nodeValue;
                                    show.hits[i][nodeName] = nodeText;
                                }
                             }
@@ -278,8 +306,11 @@ pz2.prototype = {
                     }
                     __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.showCounter*__myself.dumpFactor));
+                        __myself.showTimer = setTimeout("__myself.show()", delay);
                 }
                 else
                     // if it gets here the http return code was 200 (pz2 errors are 417)