/*
-** $Id: pz2.js,v 1.4 2007-03-28 15:20:53 jakub Exp $
+** $Id: pz2.js,v 1.70 2008-03-12 11:36:57 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) {
- //for convenience
- __myself = this;
-
+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("Pz2.js: Array with parameters has to be suplied.");
+
+ //supported pazpar2's protocol version
+ this.suppProtoVer = '1';
+ if (typeof paramArray.pazpar2path != "undefined")
+ this.pz2String = paramArray.pazpar2path;
+ else
+ this.pz2String = "/pazpar2/search.pz2";
+ this.useSessions = true;
+
+ this.stylesheet = paramArray.detailstylesheet || null;
+ //load stylesheet if required in async mode
+ if( this.stylesheet ) {
+ var context = this;
+ var request = new pzHttpRequest( this.stylesheet );
+ request.get( {}, function ( doc ) { context.xslDoc = doc; } );
+ }
+
+ this.errorHandler = paramArray.errorhandler || null;
// function callbacks
- __myself.statCallback = paramArray.onstat || null;
- __myself.showCallback = paramArray.onshow || null;
- __myself.termlistCallback = paramArray.onterm || null;
- __myself.recordCallback = paramArray.onrecord || null;
- __myself.bytargetCallback = paramArray.onbytarget || null;
+ this.initCallback = paramArray.oninit || null;
+ this.statCallback = paramArray.onstat || null;
+ this.showCallback = paramArray.onshow || null;
+ this.termlistCallback = paramArray.onterm || null;
+ this.recordCallback = paramArray.onrecord || null;
+ this.bytargetCallback = paramArray.onbytarget || null;
+ this.resetCallback = paramArray.onreset || null;
// termlist keys
- __myself.termKeys = paramArray.termlist || "subject";
+ this.termKeys = paramArray.termlist || "subject";
// some configurational stuff
- __myself.pz2String = "search.pz2";
- __myself.keepAlive = 50000;
-
- __myself.sessionID = null;
- __myself.initStatusOK = false;
- __myself.pingStatusOK = false;
- __myself.searchStatusOK = false;
-
- if ( paramArray.keepAlive < __myself.keepAlive )
- __myself.keepAlive = paramArray.keepAlive;
+ this.keepAlive = 50000;
+
+ if ( paramArray.keepAlive < this.keepAlive )
+ this.keepAlive = paramArray.keepAlive;
+ this.sessionID = null;
+ this.initStatusOK = false;
+ this.pingStatusOK = false;
+ this.searchStatusOK = false;
+
// for sorting
- __myself.currentSort = "relevance";
+ this.currentSort = "relevance";
+
// where are we?
- __myself.currentStart = 0;
- __myself.currentNum = 20;
+ this.currentStart = 0;
+ this.currentNum = 20;
// last full record retrieved
- __myself.currRecID = null;
+ this.currRecID = null;
+
// current query
- __myself.currQuery = null;
+ this.currQuery = null;
+
+ //current raw record offset
+ this.currRecOffset = null;
//timers
- __myself.statTime = paramArray.stattime || 2000;
- __myself.statTimer = null;
- __myself.termTime = paramArray.termtime || 2000;
- __myself.termTimer = null;
- __myself.showTime = paramArray.showtime || 2000;
- __myself.showTimer = null;
- __myself.bytargetTime = paramArray.bytargettime || 1000;
- __myself.bytargetTimer = null;
+ this.statTime = paramArray.stattime || 1000;
+ this.statTimer = null;
+ this.termTime = paramArray.termtime || 1000;
+ this.termTimer = null;
+ this.showTime = paramArray.showtime || 1000;
+ this.showTimer = null;
+ this.showFastCount = 4;
+ this.bytargetTime = paramArray.bytargettime || 1000;
+ this.bytargetTimer = null;
+
+ // counters for each command and applied delay
+ this.dumpFactor = 500;
+ this.showCounter = 0;
+ this.termCounter = 0;
+ this.statCounter = 0;
+ this.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);
+ this.activeClients = 1;
+
+ // if in proxy mode no need to init
+ if (paramArray.usesessions != undefined) {
+ this.useSessions = paramArray.usesessions;
+ this.initStatusOK = true;
+ }
+ // else, auto init session or wait for a user init?
+ if (this.useSessions && paramArray.autoInit !== false) {
+ this.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 (this.errorHandler) {
+ this.errorHandler(err);
+ }
+ else {
+ throw err;
+ }
+ },
+
+ // stop activity by clearing tiemouts
+ stop: function ()
+ {
+ clearTimeout(this.statTimer);
+ clearTimeout(this.showTimer);
+ clearTimeout(this.termTimer);
+ clearTimeout(this.bytargetTimer);
+ },
+
+ // reset status variables
+ reset: function ()
+ {
+ if ( this.useSessions ) {
+ this.sessionID = null;
+ this.initStatusOK = false;
+ this.pingStatusOK = false;
+ }
+ this.searchStatusOK = false;
+ this.stop();
+
+ if ( this.resetCallback )
+ this.resetCallback();
+ },
+
+ init: function ( sessionId )
{
- if ( keepAlive < __myself.keepAlive )
- __myself.keepAlive = keepAlive;
+ this.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 && this.useSessions ) {
+ this.initStatusOK = true;
+ this.sessionID = sessionId;
+ this.ping();
+ // old school direct pazpar2 init
+ } else if (this.useSessions) {
+ var context = this;
+ var request = new pzHttpRequest(this.pz2String, this.errorHandler);
+ request.safeGet(
+ { "command": "init" },
+ function(data) {
+ if ( data.getElementsByTagName("status")[0]
+ .childNodes[0].nodeValue == "OK" ) {
+ if ( data.getElementsByTagName("protocol")[0]
+ .childNodes[0].nodeValue
+ != context.suppProtoVer )
+ throw new Error(
+ "Server's protocol not supported by the client"
+ );
+ context.initStatusOK = true;
+ context.sessionID =
+ data.getElementsByTagName("session")[0]
+ .childNodes[0].nodeValue;
+ setTimeout(
+ function () {
+ context.ping();
+ },
+ context.keepAlive
+ );
+ if ( context.initCallback )
+ context.initCallback();
+ }
+ else
+ context.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 {
+ this.initStatusOK = true;
+ }
},
// no need to ping explicitly
- ping: function()
+ ping: function ()
{
- if( !__myself.initStatusOK )
- return;
- // session is not initialized code here
-
- $.get( __myself.pz2String,
- { "command": "ping", "session": __myself.sessionID },
+ // pinging only makes sense when using pazpar2 directly
+ if( !this.initStatusOK || !this.useSessions )
+ throw new Error(
+ 'Pz2.js: Ping not allowed (proxy mode) or session not initialized.'
+ );
+ var context = this;
+ var request = new pzHttpRequest(this.pz2String, this.errorHandler);
+ request.safeGet(
+ { "command": "ping", "session": this.sessionID },
function(data) {
- if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
- __myself.pingStatusOK = true;
- setTimeout("__myself.ping()", __myself.keepAlive);
+ if ( data.getElementsByTagName("status")[0]
+ .childNodes[0].nodeValue == "OK" ) {
+ context.pingStatusOK = true;
+ setTimeout(
+ function () {
+ context.ping();
+ },
+ context.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.ping()", 1000);
+ context.throwError('Ping failed. Malformed WS resonse.',
+ 111);
}
);
},
- search: function(query, num, sort, filter)
+ search: function (query, num, sort, filter, showfrom, addParamsArr)
{
- clearTimeout(__myself.statTimer);
- clearTimeout(__myself.showTimer);
- clearTimeout(__myself.termTimer);
- clearTimeout(__myself.bytargetTimer);
-
- if( !__myself.initStatusOK )
- return;
+ clearTimeout(this.statTimer);
+ clearTimeout(this.showTimer);
+ clearTimeout(this.termTimer);
+ clearTimeout(this.bytargetTimer);
+
+ this.showCounter = 0;
+ this.termCounter = 0;
+ this.bytargetCounter = 0;
+ this.statCounter = 0;
+
+ // no proxy mode
+ if( !this.initStatusOK )
+ throw new Error('Pz2.js: session not initialized.');
if( query !== undefined )
- __myself.currQuery = query;
+ this.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;
+
+ var searchParams = {
+ "command": "search",
+ "query": this.currQuery,
+ "session": this.sessionID
+ };
+
+ if (filter !== undefined)
+ searchParams["filter"] = filter;
- $.get( __myself.pz2String,
+ // copy additional parmeters, do not overwrite
+ if (addParamsArr != undefined) {
+ for (var prop in addParamsArr) {
+ if (!searchParams.hasOwnProperty(prop))
+ searchParams[prop] = addParamsArr[prop];
+ }
+ }
+
+ var context = this;
+ var request = new pzHttpRequest(this.pz2String, this.errorHandler);
+ request.safeGet(
searchParams,
function(data) {
- if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
- __myself.searchStatusOK = true;
+ if ( data.getElementsByTagName("status")[0]
+ .childNodes[0].nodeValue == "OK" ) {
+ context.searchStatusOK = true;
//piggyback search
- __myself.show(0, num, sort);
- if ( __myself.statCallback )
- __myself.statTimer = setTimeout("__myself.stat()", __myself.statTime / 2);
- if ( __myself.termlistCallback )
- __myself.termlist();
- //__myself.termTimer = setTimeout("__myself.termlist()", __myself.termTime / 2);
- if ( __myself.bytargetCallback )
- __myself.bytargetTimer = setTimeout("__myself.bytarget()", __myself.bytargetTime / 2);
+ context.show(start, num, sort);
+ if ( context.statCallback )
+ context.stat();
+ if ( context.termlistCallback )
+ context.termlist();
+ if ( context.bytargetCallback )
+ context.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
- setTimeout("__myself.search(__myself.currQuery)", 1000);
+ context.throwError('Search failed. Malformed WS resonse.',
+ 112);
}
);
},
stat: function()
{
- if( !__myself.searchStatusOK )
- return;
+ if( !this.initStatusOK )
+ throw new Error('Pz2.js: session not initialized.');
+
// if called explicitly takes precedence
- clearTimeout(__myself.statTimer);
-
- $.get( __myself.pz2String,
- { "command": "stat", "session": __myself.sessionID },
+ clearTimeout(this.statTimer);
+
+ var context = this;
+ var request = new pzHttpRequest(this.pz2String, this.errorHandler);
+ request.safeGet(
+ { "command": "stat", "session": this.sessionID },
function(data) {
if ( data.getElementsByTagName("stat") ) {
- var activeClients = Number( data.getElementsByTagName("activeclients")[0].childNodes[0].nodeValue );
- __myself.activeClients = activeClients;
+ var activeClients =
+ Number( data.getElementsByTagName("activeclients")[0]
+ .childNodes[0].nodeValue );
+ context.activeClients = activeClients;
var stat = {
- "activeclients": activeClients,
- "hits": Number( data.getElementsByTagName("hits")[0].childNodes[0].nodeValue ),
- "records": Number( data.getElementsByTagName("records")[0].childNodes[0].nodeValue ),
- "clients": Number( data.getElementsByTagName("clients")[0].childNodes[0].nodeValue ),
- "initializing": Number( data.getElementsByTagName("initializing")[0].childNodes[0].nodeValue ),
- "searching": Number( data.getElementsByTagName("searching")[0].childNodes[0].nodeValue ),
- "presenting": Number( data.getElementsByTagName("presenting")[0].childNodes[0].nodeValue ),
- "idle": Number( data.getElementsByTagName("idle")[0].childNodes[0].nodeValue ),
- "failed": Number( data.getElementsByTagName("failed")[0].childNodes[0].nodeValue ),
- "error": Number( data.getElementsByTagName("error")[0].childNodes[0].nodeValue )
+ "activeclients": activeClients,
+ "hits":
+ Number( data.getElementsByTagName("hits")[0]
+ .childNodes[0].nodeValue ),
+ "records":
+ Number( data.getElementsByTagName("records")[0]
+ .childNodes[0].nodeValue ),
+ "clients":
+ Number( data.getElementsByTagName("clients")[0]
+ .childNodes[0].nodeValue ),
+ "initializing":
+ Number( data.getElementsByTagName("initializing")[0]
+ .childNodes[0].nodeValue ),
+ "searching":
+ Number( data.getElementsByTagName("searching")[0]
+ .childNodes[0].nodeValue ),
+ "presenting":
+ Number( data.getElementsByTagName("presenting")[0]
+ .childNodes[0].nodeValue ),
+ "idle":
+ Number( data.getElementsByTagName("idle")[0]
+ .childNodes[0].nodeValue ),
+ "failed":
+ Number( data.getElementsByTagName("failed")[0]
+ .childNodes[0].nodeValue ),
+ "error":
+ Number( data.getElementsByTagName("error")[0]
+ .childNodes[0].nodeValue )
};
- __myself.statCallback(stat);
- if (activeClients > 0)
- __myself.statTimer = setTimeout("__myself.stat()", __myself.statTime);
+
+ context.statCounter++;
+ var delay = context.statTime
+ + context.statCounter * context.dumpFactor;
+
+ if ( activeClients > 0 )
+ context.statTimer =
+ setTimeout(
+ function () {
+ context.stat();
+ },
+ delay
+ );
+ context.statCallback(stat);
}
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);
+ context.throwError('Stat failed. Malformed WS resonse.',
+ 113);
}
);
},
show: function(start, num, sort)
{
- if( !__myself.searchStatusOK )
- return;
+ if( !this.searchStatusOK && this.useSessions )
+ throw new Error(
+ 'Pz2.js: show command has to be preceded with a search command.'
+ );
+
// if called explicitly takes precedence
- clearTimeout(__myself.showTimer);
+ clearTimeout(this.showTimer);
if( sort !== undefined )
- __myself.currentSort = sort;
+ this.currentSort = sort;
if( start !== undefined )
- __myself.currentStart = Number( start );
+ this.currentStart = Number( start );
if( num !== undefined )
- __myself.currentNum = Number( num );
-
- $.get( __myself.pz2String,
- { "command": "show", "session": __myself.sessionID, "start": __myself.currentStart,
- "num": __myself.currentNum, "sort": __myself.currentSort, "block": 1 },
+ this.currentNum = Number( num );
+
+ var context = this;
+ var request = new pzHttpRequest(this.pz2String, this.errorHandler);
+ request.safeGet(
+ {
+ "command": "show",
+ "session": this.sessionID,
+ "start": this.currentStart,
+ "num": this.currentNum,
+ "sort": this.currentSort,
+ "block": 1
+ },
function(data) {
- if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
+ if ( data.getElementsByTagName("status")[0]
+ .childNodes[0].nodeValue == "OK" ) {
// 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 );
+ var activeClients =
+ Number( data.getElementsByTagName("activeclients")[0]
+ .childNodes[0].nodeValue );
+ context.activeClients = activeClients;
var show = {
- "activeclients": activeClients,
- "merged": Number( data.getElementsByTagName("merged")[0].childNodes[0].nodeValue ),
- "total": Number( data.getElementsByTagName("total")[0].childNodes[0].nodeValue ),
- "start": Number( data.getElementsByTagName("start")[0].childNodes[0].nodeValue ),
- "num": Number( data.getElementsByTagName("num")[0].childNodes[0].nodeValue ),
- "hits": []
+ "activeclients": activeClients,
+ "merged":
+ Number( data.getElementsByTagName("merged")[0]
+ .childNodes[0].nodeValue ),
+ "total":
+ Number( data.getElementsByTagName("total")[0]
+ .childNodes[0].nodeValue ),
+ "start":
+ Number( data.getElementsByTagName("start")[0]
+ .childNodes[0].nodeValue ),
+ "num":
+ Number( data.getElementsByTagName("num")[0]
+ .childNodes[0].nodeValue ),
+ "hits": []
};
// parse all the first-level nodes for all <hit> tags
var hits = data.getElementsByTagName("hit");
- var hit = new Array();
- for (i = 0; i < hits.length; i++) {
- show.hits[i] = new Array();
- for ( j = 0; j < hits[i].childNodes.length; j++) {
- 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;
- }
- }
- }
- __myself.showCallback(show);
- if (activeClients > 0)
- __myself.showTimer = setTimeout("__myself.show()", __myself.showTime);
+ for (i = 0; i < hits.length; i++)
+ show.hits[i] = Element_parseChildNodes(hits[i]);
+
+ context.showCounter++;
+ var delay = context.showTime;
+ if (context.showCounter > context.showFastCount)
+ delay += context.showCounter * context.dumpFactor;
+ if ( activeClients > 0 )
+ context.showTimer = setTimeout(
+ function () {
+ context.show();
+ },
+ delay);
+ global_show = show;
+ context.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);
+ context.throwError('Show failed. Malformed WS resonse.',
+ 114);
}
);
},
- record: function(id)
+ record: function(id, offset, syntax, handler)
{
- if( !__myself.searchStatusOK )
- return;
-
+ // we may call record with no previous search if in proxy mode
+ if(!this.searchStatusOK && this.useSessions)
+ throw new Error(
+ 'Pz2.js: record command has to be preceded with a search command.'
+ );
+
if( id !== undefined )
- __myself.currRecID = id;
+ this.currRecID = id;
+
+ var recordParams = {
+ "command": "record",
+ "session": this.sessionID,
+ "id": this.currRecID
+ };
+
+ this.currRecOffset = null;
+ if (offset != undefined) {
+ recordParams["offset"] = offset;
+ this.currRecOffset = offset;
+ }
+
+ if (syntax != undefined)
+ recordParams['syntax'] = syntax;
- $.get( __myself.pz2String,
- { "command": "record", "session": __myself.sessionID, "id": __myself.currRecID },
+ //overwrite default callback id needed
+ var callback = this.recordCallback;
+ var args = undefined;
+ if (handler != undefined) {
+ callback = handler['callback'];
+ args = handler['args'];
+ }
+
+ var context = this;
+ var request = new pzHttpRequest(this.pz2String, this.errorHandler);
+
+ request.safeGet(
+ 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;
- }
- }
- // 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 = locationNodes[i].childNodes[j].firstChild.nodeValue;
- record["location"][i][nodeName] = nodeText;
- }
- }
- }
- __myself.recordCallback(record);
+ var record;
+ //raw record
+ if (context.currRecOffset !== null) {
+ record = new Array();
+ record['xmlDoc'] = data;
+ record['offset'] = context.currRecOffset;
+ callback(record, args);
+ //pz2 record
+ } else if ( recordNode =
+ data.getElementsByTagName("record")[0] ) {
+ // if stylesheet was fetched do not parse the response
+ if ( context.xslDoc ) {
+ record = new Array();
+ record['xmlDoc'] = data;
+ record['xslDoc'] = context.xslDoc;
+ record['recid'] =
+ recordNode.getElementsByTagName("recid")[0]
+ .firstChild.nodeValue;
+ //parse record
+ } else {
+ record = Element_parseChildNodes(recordNode);
+ }
+ callback(record, args);
}
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);
+ context.throwError('Record failed. Malformed WS resonse.',
+ 115);
}
);
},
+
termlist: function()
{
- if( !__myself.searchStatusOK )
- return;
- // if called explicitly takes precedence
- clearTimeout(__myself.termTimer);
+ if( !this.searchStatusOK && this.useSessions )
+ throw new Error(
+ 'Pz2.js: termlist command has to be preceded with a search command.'
+ );
- $.get( __myself.pz2String,
- { "command": "termlist", "session": __myself.sessionID, "name": __myself.termKeys },
+ // if called explicitly takes precedence
+ clearTimeout(this.termTimer);
+
+ var context = this;
+ var request = new pzHttpRequest(this.pz2String, this.errorHandler);
+ request.safeGet(
+ {
+ "command": "termlist",
+ "session": this.sessionID,
+ "name": this.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 );
+ context.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");
+ var termIdNode =
+ terms[j].getElementsByTagName("id");
if(terms[j].getElementsByTagName("id").length)
- term["id"] = termIdNode[0].childNodes[0].nodeValue;
-
+ term["id"] =
+ termIdNode[0].childNodes[0].nodeValue;
termList[listName][j] = term;
}
}
- __myself.termlistCallback(termList);
- if (termList["activeclients"] > 0)
- __myself.termTimer = setTimeout("__myself.termlist()", __myself.termTime);
+
+ context.termCounter++;
+ var delay = context.termTime
+ + context.termCounter * context.dumpFactor;
+ if ( activeClients > 0 )
+ context.termTimer =
+ setTimeout(
+ function () {
+ context.termlist();
+ },
+ delay
+ );
+
+ context.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);
+ context.throwError('Termlist failed. Malformed WS resonse.',
+ 116);
}
);
},
bytarget: function()
{
- if( !__myself.searchStatusOK )
+ if( !this.initStatusOK && this.useSessions )
+ throw new Error(
+ 'Pz2.js: bytarget command has to be preceded with a search command.'
+ );
+
+ // no need to continue
+ if( !this.searchStatusOK )
return;
- // if called explicitly takes precedence
- clearTimeout(__myself.bytargetTimer);
- $.get( __myself.pz2String,
- { "command": "bytarget", "session": __myself.sessionID },
+ // if called explicitly takes precedence
+ clearTimeout(this.bytargetTimer);
+
+ var context = this;
+ var request = new pzHttpRequest(this.pz2String, this.errorHandler);
+ request.safeGet(
+ { "command": "bytarget", "session": this.sessionID },
function(data) {
- if ( data.getElementsByTagName("status")[0].childNodes[0].nodeValue == "OK" ) {
+ if ( data.getElementsByTagName("status")[0]
+ .childNodes[0].nodeValue == "OK" ) {
var targetNodes = data.getElementsByTagName("target");
var bytarget = new Array();
for ( i = 0; i < targetNodes.length; i++) {
bytarget[i] = new Array();
for( j = 0; j < targetNodes[i].childNodes.length; j++ ) {
- if ( targetNodes[i].childNodes[j].nodeType == Node.ELEMENT_NODE ) {
- var nodeName = targetNodes[i].childNodes[j].nodeName;
- var nodeText = targetNodes[i].childNodes[j].firstChild.nodeValue;
+ if ( targetNodes[i].childNodes[j].nodeType
+ == Node.ELEMENT_NODE ) {
+ var nodeName =
+ targetNodes[i].childNodes[j].nodeName;
+ var nodeText =
+ targetNodes[i].childNodes[j]
+ .firstChild.nodeValue;
bytarget[i][nodeName] = nodeText;
}
}
}
- __myself.bytargetCallback(bytarget);
- if ( __myself.activeClients > 0 )
- __myself.bytargetTimer = setTimeout("__myself.bytarget()", __myself.bytargetTime);
+
+ context.bytargetCounter++;
+ var delay = context.bytargetTime
+ + context.bytargetCounter * context.dumpFactor;
+ if ( context.activeClients > 0 )
+ context.bytargetTimer =
+ setTimeout(
+ function () {
+ context.bytarget();
+ },
+ delay
+ );
+
+ context.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);
+ context.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 );
+ this.show( ( step * this.currentNum ) + this.currentStart );
},
+
showPrev: function(page)
{
- if (__myself.currentStart == 0 )
+ if (this.currentStart == 0 )
return false;
var step = page || 1;
- var newStart = __myself.currentStart - (step * __myself.currentNum );
- __myself.show( newStart > 0 ? newStart : 0 );
+ var newStart = this.currentStart - (step * this.currentNum );
+ this.show( newStart > 0 ? newStart : 0 );
},
+
showPage: function(pageNum)
{
//var page = pageNum || 1;
- __myself.show(pageNum * __myself.currentNum);
+ this.show(pageNum * this.currentNum);
+ }
+};
+
+/*
+********************************************************************************
+** AJAX HELPER CLASS ***********************************************************
+********************************************************************************
+*/
+var pzHttpRequest = function ( url, errorHandler ) {
+ this.maxUrlLength = 2048;
+ this.request = null;
+ this.url = url;
+ this.errorHandler = errorHandler || null;
+ this.async = true;
+ this.requestHeaders = {};
+
+ 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 =
+{
+ safeGet: function ( params, callback )
+ {
+ var encodedParams = this.encodeParams(params);
+ var url = this._urlAppendParams(encodedParams);
+ if (url.length >= this.maxUrlLength) {
+ this.requestHeaders["Content-Type"]
+ = "application/x-www-form-urlencoded";
+ this._send( 'POST', this.url, encodedParams, callback );
+ } else {
+ this._send( 'GET', url, '', callback );
+ }
+ },
+
+ get: function ( params, callback )
+ {
+ this._send( 'GET', this._urlAppendParams(this.encodeParams(params)),
+ '', callback );
+ },
+
+ post: function ( params, data, callback )
+ {
+ this._send( 'POST', this._urlAppendParams(this.encodeParams(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;
+ },
+
+ encodeParams: function (params)
+ {
+ var sep = "";
+ var encoded = "";
+ for (var key in params) {
+ if (params[key] != null) {
+ encoded += sep + key + '=' + encodeURIComponent(params[key]);
+ sep = '&';
+ }
+ }
+ return encoded;
+ },
+
+ _send: function ( type, url, data, callback)
+ {
+ var context = this;
+ this.callback = callback;
+ this.async = true;
+ this.request.open( type, url, this.async );
+ for (var key in this.requestHeaders)
+ this.request.setRequestHeader(key, this.requestHeaders[key]);
+ this.request.onreadystatechange = function () {
+ context._handleResponse();
+ }
+ this.request.send(data);
+ },
+
+ _urlAppendParams: function (encodedParams)
+ {
+ if (encodedParams)
+ return this.url + "?" + encodedParams;
+ else
+ return this.url;
+ },
+
+ _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 FUNCTIONS ********************************************************
+********************************************************************************
+*/
+
+// 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.");
+ }
+}
+
+Element_parseChildNodes = function (node)
+{
+ var parsed = {};
+ var hasChildElems = false;
+
+ if (node.hasChildNodes()) {
+ var children = node.childNodes;
+ for (var i = 0; i < children.length; i++) {
+ var child = children[i];
+ if (child.nodeType == Node.ELEMENT_NODE) {
+ hasChildElems = true;
+ var nodeName = child.nodeName;
+ if (!(nodeName in parsed))
+ parsed[nodeName] = [];
+ parsed[nodeName].push(Element_parseChildNodes(child));
+ }
+ }
+ }
+
+ var attrs = node.attributes;
+ for (var i = 0; i < attrs.length; i++) {
+ var attrName = '@' + attrs[i].nodeName;
+ var attrValue = attrs[i].nodeValue;
+ parsed[attrName] = attrValue;
+ }
+
+ // if no nested elements, get text content
+ if (node.hasChildNodes() && !hasChildElems) {
+ if (node.attributes.length)
+ parsed['textContent'] = node.firstChild.nodeValue;
+ else
+ parsed = node.firstChild.nodeValue;
+ }
+
+ return parsed;
+}
+
+/* do not remove trailing bracket */
}
projects / pazpar2-moved-to-github.git / blobdiff