RSS-Readers

Ein nett gemachter RSS Reader in Javascript, nur schade, dass der Code unkommentiert ist (aber bei so wenig Lines of Code versteht man den auch so ;-))

Ajax.RssReader = Class.create();
Ajax.RssReader.prototype = Object.extend(new Ajax.Request(), {

initialize : function( url, options ) {

options = options || {};

this.setOptions(options);

this.items = {};

var onSuccess = this.options.onSuccess || Prototype.emptyFunction;
var onFailure = this.options.onFailure || Prototype.emptyFunction;

this.options.onSuccess = (function(t) { if( this.onSuccess(t) ) { onSuccess(this); } else { this.onFailure(t); onFailure(this); } }).bind(this);
this.options.onFailure = (function(t) { this.onFailure(t); onFailure(this); }).bind(this);

this.request( url );

},

onSuccess : function( t ) {

try {
var node = t.responseXML;
var xmlChannel = node.getElementsByTagName(’channel’).item(0);
}
catch(e) {
return false;
}

this.channel = {
title: this._getElementValue(xmlChannel, ‘title’),
link: this._getElementValue(xmlChannel, ‘link’),
description: this._getElementValue(xmlChannel, ‘description’),
language: this._getElementValue(xmlChannel, ‘language’),
copyright: this._getElementValue(xmlChannel, ‘copyright’),
managingEditor: this._getElementValue(xmlChannel, ‘managingEditor’),
webMaster: this._getElementValue(xmlChannel, ‘webMaster’),
pubDate: this._getElementValue(xmlChannel, ‘pubDate’),
lastBuildDate: this._getElementValue(xmlChannel, ‘lastBuildDate’)
};

this.items = new Array();

var xmlItems = xmlChannel.getElementsByTagName(’item’);

for (var n=0; n

var xmlItem = xmlItems[n];

var item = {
title: this._getElementValue(xmlItem, 'title'),
link: this._getElementValue(xmlItem, 'link'),
description: this._getElementValue(xmlItem, 'description'),
author: this._getElementValue(xmlItem, 'author'),
category: this._getElementValue(xmlItem, 'category'),
comments: this._getElementValue(xmlItem, 'comments'),
guid: this._getElementValue(xmlItem, 'guid'),
pubDate: this._getElementValue(xmlItem, 'pubDate')
};

this.items.push( item );

}

return true;

},

onFailure : function( t ) {

},

_getElementValue : function( node, elementName ) {

try {
var value = node.getElementsByTagName(elementName).item(0).firstChild.data;
}
catch(e) {
var value = '';
}

return value;

}

});

Noch ist dieser in JS gecodeter Rss-Reader nicht stabil, bei aufgetretenen Problemen bittet der Autor um Hinweise an: r.schuil@gmail.com (nur englische Mails)

http://r.schuil.googlepages.com/ajax.rssreader

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This entry was posted on Dienstag, Juni 6th, 2006 at 8:52 pm and is filed under RSS Readers und Aggregatoren.