/*
-** $Id: pz2.js,v 1.6 2007-04-13 17:19:53 quinn Exp $
+** $Id: pz2.js,v 1.60 2007-10-02 10:33:18 jakub Exp $
** pz2.js - pazpar2's javascript client library.
*/
Node.DOCUMENT_FRAGMENT_NODE = 11;
Node.NOTATION_NODE = 12;
}
-// check for jQuery
-if(typeof window.jQuery == "undefined"){
- throw new Error("pz2.js requires jQuery library");
-}
+
// prevent execution of more than once
if(typeof window.pz2 == "undefined") {
window.undefined = window.undefined;
-var pz2 = function(paramArray) {
+var pz2 = function ( paramArray )
+{
+
+ // at least one callback required
+ if ( !paramArray )
+ throw new Error("Pz2.js: An array with parameters has to be suplied when instantiating a class");
+
//for convenience
__myself = this;
- // at least one callback required
- if ( !paramArray )
- throw new Error("An array with parameters has to be suplied when instantiating a class");
+ //supported pazpar2's protocol version
+ __myself.suppProtoVer = '1';
+ if (typeof paramArray.pazpar2path != "undefined")
+ __myself.pz2String = paramArray.pazpar2path;
+ else
+ __myself.pz2String = "/pazpar2/search.pz2";
+ __myself.useSessions = true;
+
+ __myself.stylesheet = paramArray.detailstylesheet || null;
+ //load stylesheet if required in async mode
+ if( __myself.stylesheet ) {
+ var request = new pzHttpRequest( __myself.stylesheet );
+ request.get( {}, function ( doc ) { __myself.xslDoc = doc; } );
+ }
+
+ __myself.errorHandler = paramArray.errorhandler || null;
// function callbacks
__myself.statCallback = paramArray.onstat || null;
__myself.termlistCallback = paramArray.onterm || null;
__myself.recordCallback = paramArray.onrecord || null;
__myself.bytargetCallback = paramArray.onbytarget || null;
+ __myself.resetCallback = paramArray.onreset || null;
// termlist keys
__myself.termKeys = paramArray.termlist || "subject";
// some configurational stuff
- __myself.pz2String = "search.pz2";
__myself.keepAlive = 50000;
+
+ if ( paramArray.keepAlive < __myself.keepAlive )
+ __myself.keepAlive = paramArray.keepAlive;
__myself.sessionID = null;
__myself.initStatusOK = false;
__myself.pingStatusOK = false;
__myself.searchStatusOK = false;
-
- if ( paramArray.keepAlive < __myself.keepAlive )
- __myself.keepAlive = paramArray.keepAlive;
-
+
// for sorting
__myself.currentSort = "relevance";
+
// where are we?
__myself.currentStart = 0;
__myself.currentNum = 20;
// last full record retrieved
__myself.currRecID = null;
+
// current query
__myself.currQuery = null;
//timers
- __myself.statTime = paramArray.stattime || 2000;
+ __myself.statTime = paramArray.stattime || 1000;
__myself.statTimer = null;
__myself.termTime = paramArray.termtime || 1000;
__myself.termTimer = null;
__myself.showTime = paramArray.showtime || 1000;
__myself.showTimer = null;
+ __myself.showFastCount = 4;
__myself.bytargetTime = paramArray.bytargettime || 1000;
__myself.bytargetTimer = null;
- //useful?
+ // counters for each command and applied delay
__myself.dumpFactor = 500;
__myself.showCounter = 0;
__myself.termCounter = 0;
+ __myself.statCounter = 0;
+ __myself.bytargetCounter = 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);
- });
-
- // auto init session?
- if (paramArray.autoInit !== false)
- __myself.init(__myself.keepAlive);
+ // if in proxy mode no need to init
+ if (paramArray.usesessions != undefined) {
+ __myself.useSessions = paramArray.usesessions;
+ __myself.initStatusOK = true;
+ }
+ // else, auto init session or wait for a user init?
+ if (__myself.useSessions && paramArray.autoInit !== false) {
+ __myself.init();
+ }
};
-pz2.prototype = {
- init: function(keepAlive)
+
+pz2.prototype =
+{
+ //error handler for async error throws
+ throwError: function (errMsg, errCode)
+ {
+ var err = new Error(errMsg);
+ if (errCode) err.code = errCode;
+
+ if (__myself.errorHandler) {
+ __myself.errorHandler(err);
+ }
+ else {
+ throw err;
+ }
+ },
+
+ // stop activity by clearing tiemouts
+ stop: function ()
+ {
+ clearTimeout(__myself.statTimer);
+ clearTimeout(__myself.showTimer);
+ clearTimeout(__myself.termTimer);
+ clearTimeout(__myself.bytargetTimer);
+ },
+
+ // reset status variables
+ reset: function ()
+ {
+ if ( __myself.useSessions ) {
+ __myself.sessionID = null;
+ __myself.initStatusOK = false;
+ __myself.pingStatusOK = false;
+ }
+ __myself.searchStatusOK = false;
+ __myself.stop();
+
+ if ( __myself.resetCallback )
+ __myself.resetCallback();
+ },
+
+ init: function ( sessionId )
{
- if ( keepAlive < __myself.keepAlive )
- __myself.keepAlive = keepAlive;
+ __myself.reset();
- $.get( __myself.pz2String,
- { "command": "init" },
- function(data) {
- if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
- __myself.initStatusOK = true;
- __myself.sessionID = data.getElementsByTagName("session")[0].childNodes[0].nodeValue;
- setTimeout(__myself.ping, __myself.keepAlive);
+ // session id as a param
+ if ( sessionId != undefined && __myself.useSessions ) {
+ __myself.initStatusOK = true;
+ __myself.sessionID = sessionId;
+ __myself.ping();
+ // old school direct pazpar2 init
+ } else if (__myself.useSessions) {
+ var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
+ request.get(
+ { "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);
+ }
+ else
+ // if it gets here the http return code was 200 (pz2 errors are 417)
+ // but the response was invalid, it should never occur
+ // setTimeout("__myself.init()", 1000);
+ __myself.throwError('Init failed. Malformed WS resonse.', 110);
}
- else
- // if it gets here the http return code was 200 (pz2 errors are 417)
- // but the response was invalid, it should never occur
- setTimeout("__myself.init()", 1000);
- }
- );
+ );
+ // when through proxy no need to init
+ } else {
+ __myself.initStatusOK = true;
+ }
},
// no need to ping explicitly
- ping: function()
+ ping: function ()
{
- if( !__myself.initStatusOK )
- return;
+ // pinging only makes sense when using pazpar2 directly
+ if( !__myself.initStatusOK || !__myself.useSessions )
+ throw new Error('Pz2.js: Ping not allowed (proxy mode) or session not initialized.');
// session is not initialized code here
-
- $.get( __myself.pz2String,
+
+ var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
+ request.get(
{ "command": "ping", "session": __myself.sessionID },
function(data) {
if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
else
// if it gets here the http return code was 200 (pz2 errors are 417)
// but the response was invalid, it should never occur
- setTimeout("__myself.ping()", 1000);
+ // setTimeout("__myself.ping()", 1000);
+ __myself.throwError('Ping failed. Malformed WS resonse.', 111);
}
);
},
- search: function(query, num, sort, filter)
+ search: function (query, num, sort, filter, showfrom)
{
clearTimeout(__myself.statTimer);
clearTimeout(__myself.showTimer);
__myself.showCounter = 0;
__myself.termCounter = 0;
+ __myself.bytargetCounter = 0;
+ __myself.statCounter = 0;
+ // no proxy mode
if( !__myself.initStatusOK )
- return;
+ throw new Error('Pz2.js: session not initialized.');
if( query !== undefined )
__myself.currQuery = query;
else
- throw new Error("You need to supply query to the search command");
-
- if( filter !== undefined )
- var searchParams = { "command": "search", "session": __myself.sessionID, "query": __myself.currQuery, "filter": filter };
+ throw new Error("Pz2.js: no query supplied to the search command.");
+
+ if ( showfrom !== undefined )
+ var start = showfrom;
else
- var searchParams = { "command": "search", "session": __myself.sessionID, "query": __myself.currQuery };
+ var start = 0;
- $.get( __myself.pz2String,
+ var searchParams = { "command": "search", "query": __myself.currQuery, "session": __myself.sessionID };
+
+ if (filter !== undefined)
+ searchParams["filter"] = filter;
+
+ var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
+ request.get(
searchParams,
function(data) {
if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
__myself.searchStatusOK = true;
//piggyback search
- __myself.show(0, num, sort);
+ __myself.show(start, num, sort);
if ( __myself.statCallback )
- __myself.statTimer = setTimeout("__myself.stat()", __myself.statTime / 2);
+ __myself.stat();
+ //__myself.statTimer = setTimeout("__myself.stat()", __myself.statTime / 4);
if ( __myself.termlistCallback )
- //__myself.termlist();
- __myself.termTimer = setTimeout("__myself.termlist()", __myself.termTime / 2);
+ __myself.termlist();
+ //__myself.termTimer = setTimeout("__myself.termlist()", __myself.termTime / 4);
if ( __myself.bytargetCallback )
- __myself.bytargetTimer = setTimeout("__myself.bytarget()", __myself.bytargetTime / 2);
+ __myself.bytarget();
+ //__myself.bytargetTimer = setTimeout("__myself.bytarget()", __myself.bytargetTime / 4);
}
else
// if it gets here the http return code was 200 (pz2 errors are 417)
// but the response was invalid, it should never occur
- setTimeout("__myself.search(__myself.currQuery)", 1000);
+ // setTimeout("__myself.search(__myself.currQuery)", 500);
+ __myself.throwError('Search failed. Malformed WS resonse.', 112);
}
);
},
stat: function()
{
- if( !__myself.searchStatusOK )
- return;
+ if( !__myself.initStatusOK )
+ throw new Error('Pz2.js: session not initialized.');
+
// if called explicitly takes precedence
clearTimeout(__myself.statTimer);
-
- $.get( __myself.pz2String,
+
+ var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
+ request.get(
{ "command": "stat", "session": __myself.sessionID },
function(data) {
if ( data.getElementsByTagName("stat") ) {
"failed": Number( data.getElementsByTagName("failed")[0].childNodes[0].nodeValue ),
"error": Number( data.getElementsByTagName("error")[0].childNodes[0].nodeValue )
};
+
+ __myself.statCounter++;
+ var delay = __myself.statTime + __myself.statCounter * __myself.dumpFactor;
+ if ( activeClients > 0 )
+ __myself.statTimer = setTimeout("__myself.stat()", delay);
__myself.statCallback(stat);
- if (activeClients > 0)
- __myself.statTimer = setTimeout("__myself.stat()", __myself.statTime);
}
else
// if it gets here the http return code was 200 (pz2 errors are 417)
// but the response was invalid, it should never occur
- __myself.statTimer = setTimeout("__myself.stat()", __myself.statTime / 4);
+ //__myself.statTimer = setTimeout("__myself.stat()", __myself.statTime / 4);
+ __myself.throwError('Stat failed. Malformed WS resonse.', 113);
}
);
},
show: function(start, num, sort)
{
- if( !__myself.searchStatusOK )
- return;
+ if( !__myself.searchStatusOK && __myself.useSessions )
+ throw new Error('Pz2.js: show command has to be preceded with a search command.');
+
// if called explicitly takes precedence
clearTimeout(__myself.showTimer);
__myself.currentStart = Number( start );
if( num !== undefined )
__myself.currentNum = Number( num );
-
- $.get( __myself.pz2String,
+
+ var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
+ var context = this;
+ request.get(
{ "command": "show", "session": __myself.sessionID, "start": __myself.currentStart,
"num": __myself.currentNum, "sort": __myself.currentSort, "block": 1 },
function(data) {
// first parse the status data send along with records
// this is strictly bound to the format
var activeClients = Number( data.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue );
+ __myself.activeClients = activeClients;
var show = {
"activeclients": activeClients,
"merged": Number( data.getElementsByTagName("merged")[0].childNodes[0].nodeValue ),
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 = 'ERROR'
+ if ( hits[i].childNodes[j].firstChild )
+ nodeText = hits[i].childNodes[j].firstChild.nodeValue;
+ show.hits[i][nodeName] = nodeText;
+ }
}
}
}
- __myself.showCallback(show);
__myself.showCounter++;
- if (activeClients > 0)
- __myself.showTimer = setTimeout("__myself.show()", (__myself.showTime + __myself.showCounter*__myself.dumpFactor));
+ var delay = __myself.showTime;
+ if (__myself.showCounter > __myself.showFastCount)
+ delay += __myself.showCounter * __myself.dumpFactor;
+ if ( activeClients > 0 )
+ __myself.showTimer = setTimeout("__myself.show()", delay);
+
+ __myself.showCallback(show);
}
else
// if it gets here the http return code was 200 (pz2 errors are 417)
// but the response was invalid, it should never occur
- __myself.showTimer = setTimeout("__myself.show()", __myself.showTime / 4);
+ // __myself.showTimer = setTimeout("__myself.show()", __myself.showTime / 4);
+ __myself.throwError('Show failed. Malformed WS resonse.', 114);
}
);
},
- record: function(id)
+ record: function(id, offset, params)
{
- if( !__myself.searchStatusOK )
- return;
+ // we may call record with no previous search if in proxy mode
+ if( !__myself.searchStatusOK && __myself.useSessions)
+ throw new Error('Pz2.js: record command has to be preceded with a search command.');
+
+ if ( params == undefined )
+ params = {};
+
+ if ( params.callback != undefined ) {
+ callback = params.callback;
+ } else {
+ callback = __myself.recordCallback;
+ }
+
+ // what is that?
+ if ( params['handle'] == undefined )
+ handle = {};
+ else
+ handle = params['handle'];
if( id !== undefined )
__myself.currRecID = id;
+
+ var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
+
+ var recordParams = { "command": "record",
+ "session": __myself.sessionID,
+ "id": __myself.currRecID };
+
+ if (offset !== undefined) {
+ recordParams["offset"] = offset;
+ }
+
+ if (params.syntax != undefined) {
+ recordParams['syntax'] = params.syntax;
+ }
+
+ __myself.currRecOffset = offset;
- $.get( __myself.pz2String,
- { "command": "record", "session": __myself.sessionID, "id": __myself.currRecID },
+ request.get(
+ recordParams,
function(data) {
var recordNode;
var record = new Array();
- if ( recordNode = data.getElementsByTagName("record")[0] ) {
- for ( i = 0; i < recordNode.childNodes.length; i++) {
- if ( recordNode.childNodes[i].nodeType == Node.ELEMENT_NODE ) {
- var nodeName = recordNode.childNodes[i].nodeName;
- var nodeText = recordNode.childNodes[i].firstChild.nodeValue;
- record[nodeName] = nodeText;
+ record['xmlDoc'] = data;
+ if (__myself.currRecOffset !== undefined) {
+ record['offset'] = __myself.currRecOffset;
+ callback(record, handle);
+ } else if ( recordNode = data.getElementsByTagName("record")[0] ) {
+ // if stylesheet was fetched do not parse the response
+ if ( __myself.xslDoc ) {
+ record['recid'] = recordNode.getElementsByTagName("recid")[0].firstChild.nodeValue;
+ record['xslDoc'] = __myself.xslDoc;
+ } else {
+ for ( i = 0; i < recordNode.childNodes.length; i++) {
+ if ( recordNode.childNodes[i].nodeType == Node.ELEMENT_NODE
+ && recordNode.childNodes[i].nodeName != 'location' ) {
+ var nodeName = recordNode.childNodes[i].nodeName;
+ var nodeText = recordNode.childNodes[i].firstChild.nodeValue;
+ record[nodeName] = nodeText;
+ }
}
- }
- // the location is hard coded
- var locationNodes = recordNode.getElementsByTagName("location");
- record["location"] = new Array();
- for ( i = 0; i < locationNodes.length; i++ ) {
- record["location"][i] = {
- "id": locationNodes[i].getAttribute("id"),
- "name": locationNodes[i].getAttribute("name")
- };
- 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;
- if (locationNodes[i].childNodes[j].firstChild)
- nodeText = locationNodes[i].childNodes[j].firstChild.nodeValue;
- else
- nodeText = '';
- record["location"][i][nodeName] = nodeText;
+ // the location might be empty!!
+ var locationNodes = recordNode.getElementsByTagName("location");
+ record["location"] = new Array();
+ for ( i = 0; i < locationNodes.length; i++ ) {
+ record["location"][i] = {
+ "id": locationNodes[i].getAttribute("id"),
+ "name": locationNodes[i].getAttribute("name")
+ };
+
+ 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 = '';
+ if (locationNodes[i].childNodes[j].firstChild)
+ nodeText = locationNodes[i].childNodes[j].firstChild.nodeValue;
+ record["location"][i][nodeName] = nodeText;
+ }
}
}
}
- __myself.recordCallback(record);
+
+ callback(record, handle);
}
else
// if it gets here the http return code was 200 (pz2 errors are 417)
// but the response was invalid, it should never occur
- setTimeout("__myself.record(__myself.currRecID)", 1000);
+ // setTimeout("__myself.record(__myself.currRecID)", 500);
+ __myself.throwError('Record failed. Malformed WS resonse.', 115);
}
);
},
+
termlist: function()
{
- if( !__myself.searchStatusOK )
- return;
+ if( !__myself.searchStatusOK && __myself.useSessions )
+ throw new Error('Pz2.js: termlist command has to be preceded with a search command.');
+
// if called explicitly takes precedence
clearTimeout(__myself.termTimer);
-
- $.get( __myself.pz2String,
+
+ var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
+ request.get(
{ "command": "termlist", "session": __myself.sessionID, "name": __myself.termKeys },
function(data) {
if ( data.getElementsByTagName("termlist") ) {
- var termList = { "activeclients": Number( data.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue ) };
+ var activeClients = Number( data.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue );
+ __myself.activeClients = activeClients;
+ var termList = { "activeclients": activeClients };
var termLists = data.getElementsByTagName("list");
//for each termlist
for (i = 0; i < termLists.length; i++) {
//for each term in the list
for (j = 0; j < terms.length; j++) {
var term = {
- "name": terms[j].getElementsByTagName("name")[0].childNodes[0].nodeValue,
- "freq": terms[j].getElementsByTagName("frequency")[0].childNodes[0].nodeValue
+ "name": (terms[j].getElementsByTagName("name")[0].childNodes.length
+ ? terms[j].getElementsByTagName("name")[0].childNodes[0].nodeValue
+ : 'ERROR'),
+ "freq": terms[j].getElementsByTagName("frequency")[0].childNodes[0].nodeValue || 'ERROR'
};
var termIdNode = terms[j].getElementsByTagName("id");
}
}
- __myself.termlistCallback(termList);
__myself.termCounter++;
- if (termList["activeclients"] > 0)
- __myself.termTimer = setTimeout("__myself.termlist()", (__myself.termTime + __myself.termCounter*__myself.dumpFactor));
+ var delay = __myself.termTime + __myself.termCounter * __myself.dumpFactor;
+ if ( activeClients > 0 )
+ __myself.termTimer = setTimeout("__myself.termlist()", delay);
+
+ __myself.termlistCallback(termList);
}
else
// if it gets here the http return code was 200 (pz2 errors are 417)
// but the response was invalid, it should never occur
- __myself.termTimer = setTimeout("__myself.termlist()", __myself.termTime / 4);
+ // __myself.termTimer = setTimeout("__myself.termlist()", __myself.termTime / 4);
+ __myself.throwError('Termlist failed. Malformed WS resonse.', 116);
}
);
},
bytarget: function()
{
+ if( !__myself.initStatusOK && __myself.useSessions )
+ throw new Error('Pz2.js: bytarget command has to be preceded with a search command.');
+
+ // no need to continue
if( !__myself.searchStatusOK )
return;
+
// if called explicitly takes precedence
clearTimeout(__myself.bytargetTimer);
-
- $.get( __myself.pz2String,
+
+ var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler);
+ request.get(
{ "command": "bytarget", "session": __myself.sessionID },
function(data) {
if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
}
}
}
- __myself.bytargetCallback(bytarget);
+
+ __myself.bytargetCounter++;
+ var delay = __myself.bytargetTime + __myself.bytargetCounter * __myself.dumpFactor;
if ( __myself.activeClients > 0 )
- __myself.bytargetTimer = setTimeout("__myself.bytarget()", __myself.bytargetTime);
+ __myself.bytargetTimer = setTimeout("__myself.bytarget()", delay);
+
+ __myself.bytargetCallback(bytarget);
}
else
// if it gets here the http return code was 200 (pz2 errors are 417)
// but the response was invalid, it should never occur
- __myself.bytargetTimer = setTimeout("__myself.bytarget()", __myself.bytargetTime / 4);
+ // __myself.bytargetTimer = setTimeout("__myself.bytarget()", __myself.bytargetTime / 4);
+ __myself.throwError('Bytarget failed. Malformed WS resonse.', 117);
}
);
},
+
// just for testing, probably shouldn't be here
showNext: function(page)
{
var step = page || 1;
__myself.show( ( step * __myself.currentNum ) + __myself.currentStart );
},
+
showPrev: function(page)
{
if (__myself.currentStart == 0 )
var newStart = __myself.currentStart - (step * __myself.currentNum );
__myself.show( newStart > 0 ? newStart : 0 );
},
+
showPage: function(pageNum)
{
//var page = pageNum || 1;
__myself.show(pageNum * __myself.currentNum);
}
};
+
+/*
+*********************************************************************************
+** AJAX HELPER CLASS ************************************************************
+*********************************************************************************
+*/
+var pzHttpRequest = function ( url, errorHandler ) {
+ this.request = null;
+ this.url = url;
+ this.errorHandler = errorHandler || null;
+ this.async = true;
+
+ if ( window.XMLHttpRequest ) {
+ this.request = new XMLHttpRequest();
+ } else if ( window.ActiveXObject ) {
+ try {
+ this.request = new ActiveXObject( 'Msxml2.XMLHTTP' );
+ } catch (err) {
+ this.request = new ActiveXObject( 'Microsoft.XMLHTTP' );
+ }
+ }
+};
+
+pzHttpRequest.prototype =
+{
+ get: function ( params, callback )
+ {
+ this._send( 'GET', params, '', callback );
+ },
+
+ post: function ( params, data, callback )
+ {
+ this._send( 'POST', params, data, callback );
+ },
+
+ load: function ()
+ {
+ this.async = false;
+ this.request.open( 'GET', this.url, this.async );
+ this.request.send('');
+ if ( this.request.status == 200 )
+ return this.request.responseXML;
+ },
+
+ _send: function ( type, params, data, callback )
+ {
+ this.callback = callback;
+ var context = this;
+ this.async = true;
+ this.request.open( type, this._urlAppendParams(params), this.async );
+ this.request.onreadystatechange = function () {
+ context._handleResponse();
+ }
+ this.request.send(data);
+ },
+
+ _urlAppendParams: function (params)
+ {
+ var getUrl = this.url;
+
+ var sep = '?';
+ var el = params;
+ for (var key in el) {
+ if (el[key] != null) {
+ getUrl += sep + key + '=' + encodeURIComponent(el[key]);
+ sep = '&';
+ }
+ }
+ return getUrl;
+ },
+
+ _handleResponse: function ()
+ {
+ if ( this.request.readyState == 4 ) {
+ // pick up pazpr2 errors first
+ if ( this.request.responseXML
+ && this.request.responseXML.documentElement.nodeName == 'error'
+ && this.request.responseXML.getElementsByTagName("error").length ) {
+ var errAddInfo = '';
+ if ( this.request.responseXML.getElementsByTagName("error")[0].childNodes.length )
+ errAddInfo = ': ' + this.request.responseXML.getElementsByTagName("error")[0].childNodes[0].nodeValue;
+ var errMsg = this.request.responseXML.getElementsByTagName("error")[0].getAttribute("msg");
+ var errCode = this.request.responseXML.getElementsByTagName("error")[0].getAttribute("code");
+
+ var err = new Error(errMsg + errAddInfo);
+ err.code = errCode;
+
+ if (this.errorHandler) {
+ this.errorHandler(err);
+ }
+ else {
+ throw err;
+ }
+ } else if ( this.request.status == 200 ) {
+ this.callback( this.request.responseXML );
+ } else {
+ var err = new Error("Pz2.js: HTTP request error (AJAX). Code: "
+ + this.request.status + " Info: "
+ + this.request.statusText );
+ err.code = 'HTTP';
+
+ if (this.errorHandler) {
+ this.errorHandler(err);
+ }
+ else {
+ throw err;
+ }
+ }
+ }
+ }
+};
+
+/*
+*********************************************************************************
+** XML HELPER CLASS ************************************************************
+*********************************************************************************
+*/
+
+// DOMDocument
+
+if ( window.ActiveXObject) {
+ var DOMDoc = document;
+} else {
+ var DOMDoc = Document.prototype;
+}
+
+DOMDoc.newXmlDoc = function ( root )
+{
+ var doc;
+
+ if (document.implementation && document.implementation.createDocument) {
+ doc = document.implementation.createDocument('', root, null);
+ } else if ( window.ActiveXObject ) {
+ doc = new ActiveXObject("MSXML2.DOMDocument");
+ doc.loadXML('<' + root + '/>');
+ } else {
+ throw new Error ('No XML support in this browser');
+ }
+
+ return doc;
+}
+
+
+DOMDoc.parseXmlFromString = function ( xmlString )
+{
+ var doc;
+
+ if ( window.DOMParser ) {
+ var parser = new DOMParser();
+ doc = parser.parseFromString( xmlString, "text/xml");
+ } else if ( window.ActiveXObject ) {
+ doc = new ActiveXObject("MSXML2.DOMDocument");
+ doc.loadXML( xmlString );
+ } else {
+ throw new Error ("No XML parsing support in this browser.");
+ }
+
+ return doc;
+}
+
+DOMDoc.transformToDoc = function (xmlDoc, xslDoc)
+{
+ if ( window.XSLTProcessor ) {
+ var proc = new XSLTProcessor();
+ proc.importStylesheet( xslDoc );
+ return proc.transformToDocument(xmlDoc);
+ } else if ( window.ActiveXObject ) {
+ return document.parseXmlFromString(xmlDoc.transformNode(xslDoc));
+ } else {
+ alert( 'Unable to perform XSLT transformation in this browser' );
+ }
+}
+
+// DOMElement
+
+Element_removeFromDoc = function (DOM_Element)
+{
+ DOM_Element.parentNode.removeChild(DOM_Element);
+}
+
+Element_emptyChildren = function (DOM_Element)
+{
+ while( DOM_Element.firstChild ) {
+ DOM_Element.removeChild( DOM_Element.firstChild )
+ }
+}
+
+Element_appendTransformResult = function ( DOM_Element, xmlDoc, xslDoc )
+{
+ if ( window.XSLTProcessor ) {
+ var proc = new XSLTProcessor();
+ proc.importStylesheet( xslDoc );
+ var docFrag = false;
+ docFrag = proc.transformToFragment( xmlDoc, DOM_Element.ownerDocument );
+ DOM_Element.appendChild(docFrag);
+ } else if ( window.ActiveXObject ) {
+ DOM_Element.innerHTML = xmlDoc.transformNode( xslDoc );
+ } else {
+ alert( 'Unable to perform XSLT transformation in this browser' );
+ }
+}
+
+Element_appendTextNode = function (DOM_Element, tagName, textContent )
+{
+ var node = DOM_Element.ownerDocument.createElement(tagName);
+ var text = DOM_Element.ownerDocument.createTextNode(textContent);
+
+ DOM_Element.appendChild(node);
+ node.appendChild(text);
+
+ return node;
+}
+
+Element_setTextContent = function ( DOM_Element, textContent )
+{
+ if (typeof DOM_Element.textContent !== "undefined") {
+ DOM_Element.textContent = textContent;
+ } else if (typeof DOM_Element.innerText !== "undefined" ) {
+ DOM_Element.innerText = textContent;
+ } else {
+ throw new Error("Cannot set text content of the node, no such method.");
+ }
+}
+
+Element_getTextContent = function (DOM_Element)
+{
+ if ( typeof DOM_Element.textContent != 'undefined' ) {
+ return DOM_Element.textContent;
+ } else if (typeof DOM_Element.text != 'undefined') {
+ return DOM_Element.text;
+ } else {
+ throw new Error("Cannot get text content of the node, no such method.");
+ }
+}
+
}
projects / pazpar2-moved-to-github.git / blobdiff