X-Git-Url: http://git.indexdata.com/?a=blobdiff_plain;f=js%2Fpz2.js;h=028a5556d81c1451ddbf1918456bb26b6ffd38f1;hb=d24daa29f95b96d573b0480d043d0d9e43637cc4;hp=e2025d0cab6621d76e4e57e54fa604e14ffd70a7;hpb=8072aa01dfce99fcef6e4a0b8540ff611f3c26aa;p=pazpar2-moved-to-github.git diff --git a/js/pz2.js b/js/pz2.js index e2025d0..028a555 100644 --- a/js/pz2.js +++ b/js/pz2.js @@ -1,5 +1,5 @@ /* -** $Id: pz2.js,v 1.22 2007-05-31 08:46:32 jakub Exp $ +** $Id: pz2.js,v 1.49 2007-07-26 13:47:52 jakub Exp $ ** pz2.js - pazpar2's javascript client library. */ @@ -30,20 +30,19 @@ var pz2 = function(paramArray) { //supported pazpar2's protocol version __myself.suppProtoVer = '1'; - __myself.pz2String = "search.pz2"; + __myself.pz2String = paramArray.pazpar2path || "/pazpar2/search.pz2"; __myself.stylesheet = paramArray.detailstylesheet || null; - + __myself.useSessions = true; + if (paramArray.usesessions != undefined) { + __myself.useSessions = paramArray.usesessions; + } + //load stylesheet if required in async mode if( __myself.stylesheet ) { var request = new pzHttpRequest( __myself.stylesheet ); - request.get( - {}, - function ( doc ) { - __myself.xslDoc = doc; - } - ); + request.get( {}, function ( doc ) { __myself.xslDoc = doc; } ); } - + // at least one callback required if ( !paramArray ) throw new Error("An array with parameters has to be suplied when instantiating a class"); @@ -109,7 +108,16 @@ var pz2 = function(paramArray) { if (paramArray.autoInit !== false) __myself.init(); }; -pz2.prototype = { +pz2.prototype = +{ + stop: function () + { + clearTimeout(__myself.statTimer); + clearTimeout(__myself.showTimer); + clearTimeout(__myself.termTimer); + clearTimeout(__myself.bytargetTimer); + }, + reset: function () { __myself.sessionID = null; @@ -117,10 +125,7 @@ pz2.prototype = { __myself.pingStatusOK = false; __myself.searchStatusOK = false; - clearTimeout(__myself.statTimer); - clearTimeout(__myself.showTimer); - clearTimeout(__myself.termTimer); - clearTimeout(__myself.bytargetTimer); + __myself.stop(); if ( __myself.resetCallback ) __myself.resetCallback(); @@ -128,12 +133,12 @@ pz2.prototype = { init: function ( sessionId ) { __myself.reset(); + if ( sessionId != undefined ) { __myself.initStatusOK = true; __myself.sessionID = sessionId; __myself.ping(); - - } else { + } else if (__myself.useSessions) { var request = new pzHttpRequest(__myself.pz2String, __myself.errorHandler); request.get( { "command": "init" }, @@ -151,7 +156,9 @@ pz2.prototype = { setTimeout("__myself.init()", 1000); } ); - } + } else { + __myself.initStatusOK = true; + } }, // no need to ping explicitly ping: function () @@ -194,10 +201,11 @@ pz2.prototype = { 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 }; - else - var searchParams = { "command": "search", "session": __myself.sessionID, "query": __myself.currQuery }; + 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, @@ -314,7 +322,9 @@ pz2.prototype = { } else { var nodeName = hits[i].childNodes[j].nodeName; - var nodeText = hits[i].childNodes[j].firstChild.nodeValue; + var nodeText = 'ERROR' + if ( hits[i].childNodes[j].firstChild ) + nodeText = hits[i].childNodes[j].firstChild.nodeValue; show.hits[i][nodeName] = nodeText; } } @@ -336,23 +346,52 @@ pz2.prototype = { } ); }, - record: function(id) + record: function(id,offset, params) { - if( !__myself.searchStatusOK ) + if ( params == undefined ) + params = {}; + + if ( params.callback != undefined ) { + callback = params.callback; + } else { + callback = __myself.recordCallback; + } + + if ( params['handle'] == undefined ) + handle = {}; + else + handle = params['handle']; + + if( !__myself.searchStatusOK && __myself.useSessions) return; 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; request.get( - { "command": "record", "session": __myself.sessionID, "id": __myself.currRecID }, + recordParams, function(data) { var recordNode; var record = new Array(); - if ( recordNode = data.getElementsByTagName("record")[0] ) { + 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['xmlDoc'] = data; + record['recid'] = recordNode.getElementsByTagName("recid")[0].firstChild.nodeValue; record['xslDoc'] = __myself.xslDoc; } else { for ( i = 0; i < recordNode.childNodes.length; i++) { @@ -384,7 +423,7 @@ pz2.prototype = { } } - __myself.recordCallback(record); + callback(record, handle); } else // if it gets here the http return code was 200 (pz2 errors are 417) @@ -416,8 +455,10 @@ pz2.prototype = { //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"); @@ -511,6 +552,7 @@ 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(); @@ -527,24 +569,48 @@ pzHttpRequest.prototype = { get: function ( params, callback ) { - this.callback = callback; - - var getUrl = this.url; - var paramArr = new Array(); + this._send( 'GET', params, '', callback ); + }, - for ( var key in params ) { - paramArr.push(key + '=' + params[key] ); - } + post: function ( params, data, callback ) + { + this._send( 'POST', params, data, callback ); + }, - if ( paramArr.length ) - getUrl += '?' + paramArr.join('&'); + 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.request.open( 'GET', getUrl, true ); + this.async = true; + this.request.open( type, this._urlAppendParams(params), this.async ); this.request.onreadystatechange = function () { context._handleResponse(); } - this.request.send(null); + 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 + '=' + encodeURI(el[key]); + sep = '&'; + } + } + return getUrl; }, _handleResponse: function () @@ -587,6 +653,116 @@ pzHttpRequest.prototype = /* ********************************************************************************* +** 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; +} + +// 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 (DOM_Element.textContent) { + return DOM_Element.textContent; + } else if (DOM_Element.text ) { + return DOM_Element.text; + } else { + throw new Error("Cannot get text content of the node, no such method."); + } +} + +/* +********************************************************************************* ** QUERY CLASS ****************************************************************** ********************************************************************************* */ @@ -607,6 +783,10 @@ pzQuery.prototype = { this.simpleFilter = null; this.numTerms = 0; }, + clearSimpleQuery: function() + { + this.simpleQuery = ''; + }, addTerm: function(field, value) { var term = {"field": field, "value": value};