mirror of
https://github.com/yacy/yacy_search_server.git
synced 2024-09-19 00:01:41 +02:00
added experimental javascript terminal for rss feeds (not used yet anywhere yet, expect the worst)
.. possibly to be used as content for iframes within monitoring pages not ready yet! git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@4727 6c8d7289-2bf4-0310-a012-ef5d649a1542
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orbiter
parent
da386a1924
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167
htroot/js/rss2.js
Executable file
167
htroot/js/rss2.js
Executable file
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// parser for rss2
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function RSS2Enclosure(encElement) {
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if (encElement == null) {
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this.url = null;
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this.length = null;
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this.type = null;
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} else {
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this.url = encElement.getAttribute("url");
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this.length = encElement.getAttribute("length");
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this.type = encElement.getAttribute("type");
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}
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}
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function RSS2Guid(guidElement) {
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if (guidElement == null) {
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this.isPermaLink = null;
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this.value = null;
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} else {
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this.isPermaLink = guidElement.getAttribute("isPermaLink");
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this.value = guidElement.childNodes[0].nodeValue;
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}
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}
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function RSS2Source(souElement) {
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if (souElement == null) {
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this.url = null;
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this.value = null;
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} else {
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this.url = souElement.getAttribute("url");
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this.value = souElement.childNodes[0].nodeValue;
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}
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}
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function RSS2Item(itemxml) {
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//required
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this.title;
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this.link;
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this.description;
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//optional vars
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this.author;
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this.comments;
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this.pubDate;
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//optional objects
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this.category;
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this.enclosure;
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this.guid;
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this.source;
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var properties = new Array("title", "link", "description", "author", "comments", "pubDate");
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//var properties = new Array("title", "link");
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var tmpElement = null;
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for (var i=0; i<properties.length; i++) {
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tmpElement = itemxml.getElementsByTagName(properties[i])[0];
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if ((tmpElement != null) && (tmpElement.firstChild))
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eval("this."+properties[i]+"=tmpElement.firstChild.nodeValue");
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}
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this.category = new RSS2Category(itemxml.getElementsByTagName("category")[0]);
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this.enclosure = new RSS2Enclosure(itemxml.getElementsByTagName("enclosure")[0]);
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this.guid = new RSS2Guid(itemxml.getElementsByTagName("guid")[0]);
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this.source = new RSS2Source(itemxml.getElementsByTagName("source")[0]);
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}
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function RSS2Category(catElement) {
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if (catElement == null) {
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this.domain = null;
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this.value = null;
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} else {
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this.domain = catElement.getAttribute("domain");
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this.value = catElement.childNodes[0].nodeValue;
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}
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}
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function RSS2Image(imgElement) {
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if (imgElement == null) {
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this.url = null;
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this.link = null;
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this.width = null;
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this.height = null;
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this.description = null;
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} else {
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imgAttribs = new Array("url","title","link","width","height","description");
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for (var i=0; i<imgAttribs.length; i++)
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if (imgElement.getAttribute(imgAttribs[i]) != null)
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eval("this."+imgAttribs[i]+"=imgElement.getAttribute("+imgAttribs[i]+")");
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}
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}
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function RSS2Channel(rssxml) {
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//required
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this.title;
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this.link;
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this.description;
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//array of RSS2Item objects
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this.items = new Array();
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//optional vars
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this.language;
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this.copyright;
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this.managingEditor;
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this.webMaster;
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this.pubDate;
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this.lastBuildDate;
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this.generator;
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this.docs;
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this.ttl;
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this.rating;
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//optional objects
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this.category;
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this.image;
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var chanElement = rssxml.getElementsByTagName("channel")[0];
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var itemElements = rssxml.getElementsByTagName("item");
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for (var i=0; i<itemElements.length; i++) {
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Item = new RSS2Item(itemElements[i]);
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this.items.push(Item);
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//chanElement.removeChild(itemElements[i]);
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}
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var properties = new Array("title", "link", "description", "language", "copyright", "managingEditor", "webMaster", "pubDate", "lastBuildDate", "generator", "docs", "ttl", "rating");
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var tmpElement = null;
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for (var i=0; i<properties.length; i++) {
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tmpElement = chanElement.getElementsByTagName(properties[i])[0];
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if ((tmpElement!= null) && (tmpElement.firstChild))
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eval("this."+properties[i]+"=tmpElement.firstChild.nodeValue");
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}
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this.category = new RSS2Category(chanElement.getElementsByTagName("category")[0]);
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this.image = new RSS2Image(chanElement.getElementsByTagName("image")[0]);
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}
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// loader and display method for rss
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// this needs ajax.js and a method showRSS(RSS) to display a rss file
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var xhr;
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function getRSS(url){
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xhr = createRequestObject();
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xhr.open("GET",url,true);
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xhr.setRequestHeader("Cache-Control", "no-cache");
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xhr.setRequestHeader("Pragma", "no-cache");
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xhr.onreadystatechange = processRSS;
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xhr.send(null);
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}
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function processRSS() {
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if (xhr.readyState == 4) {
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if (xhr.status == 200) {
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if (xhr.responseText != null) {
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RSS = new RSS2Channel(xhr.responseXML);
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showRSS(RSS);
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} else {
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alert("rss file not found.");
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return false;
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}
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}
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else
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alert("Error code " + xhr.status + " received: " + xhr.statusText);
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}
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}
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151
htroot/rssTerminal.html
Executable file
151
htroot/rssTerminal.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
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<title>rss terminal</title>
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<style type="text/css">
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div#container {
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padding:6px;
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background:#fff;
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border:1px solid #000;
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width: 600px;
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height: 360px;
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margin:0 auto;
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text-align:left;
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}
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div#container p {
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margin:0px 0;
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}
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div#scrollObject {
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position: absolute;
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overflow: hidden;
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width: 600px;
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height: 360px;
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}
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div#content {
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position:absolute;
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font:9px 'Lucida Console', 'Courier New', monospace;
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top:0;
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left:0;
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}
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</style>
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<script type="text/javascript" src="/js/ajax.js"></script>
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<script type="text/javascript" src="/js/rss2.js"></script>
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<script type="text/javascript">
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var lines = new Array();
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var maxlines = 360 / 9;
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var maxwidth = 600 / 5;
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var maxtime = 30000; // time that should be wasted until everything is scrolled
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var minwait = 50; // if this is too short, the CPU will eat all performance
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var maxwait = 500;
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var scroller = null;
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var idleping = null;
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var lastwait = 1000;
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var tab = " ";
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function fillLines() {
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for (var i = 0; i < maxlines; i++) {
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addLine("");
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}
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}
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function addLine(line) {
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while (line.length > maxwidth) {
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lines.push(line.substring(0, maxwidth));
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line = tab + line.substring(maxwidth);
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}
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lines.push(line);
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if (lines.length > maxlines) {
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if (scroller != null) {
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window.clearInterval(scroller);
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scroller = null;
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}
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scroller=window.setInterval("scroll()", newwait());
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}
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show();
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}
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function show() {
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var doc = document.getElementById("content");
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doc.innerHTML = "";
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for (var i = 0; i < maxlines; i++) {
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doc.innerHTML += lines[i] + "<br />";
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}
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}
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function newwait() {
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if (lines.length > maxlines) {
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var time = maxtime / (lines.length - maxlines);
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if (time < minwait) time = minwait;
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if (time > maxwait) time = maxwait;
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} else {
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time = maxwait;
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}
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if (time < lastwait) time = (time + maxlines * lastwait) / (maxlines + 1);
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lastwait = time;
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return time;
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}
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function scroll() {
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if (scroller != null) {
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window.clearInterval(scroller);
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scroller = null;
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}
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if (lines.length > maxlines) {
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var factor = (lines.length - maxlines) / maxlines / 10;
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if (factor < 0) factor = 1;
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if (factor > 3) factor = 3;
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for (var i = 0; i < factor; i++) {
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lines.shift();
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}
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show();
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scroller=window.setInterval("scroll()", newwait());
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}
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}
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function showRSS(RSS) {
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//populate the items
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for (var i=0; i<RSS.items.length; i++) {
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if (RSS.items[i].title != null) addLine(RSS.items[i].title);
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if (RSS.items[i].link != null) addLine(tab + RSS.items[i].link);
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if (RSS.items[i].description != null) addLine(tab + RSS.items[i].description);
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}
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return true;
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}
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function idlepingInit() {
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idleping = window.setInterval("idlepingExec()", 10000);
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}
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function idlepingExec() {
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if (lines.length <= maxlines) {
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// feed in some empty lines to make the list appear alive
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addLine("");
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}
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}
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</script>
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</head>
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<body>
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<div id="container">
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<div id="scrollObject">
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<div id="content"></div>
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</div>
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</div>
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</body>
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<script type="text/javascript">
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fillLines();
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idlepingInit();
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getRSS("http://localhost:8080/yacysearch.rss?search=java&count=100");
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//getRSS("http://news.google.com/news?output=rss");
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</script>
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</html>
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