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rss reader

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Jul 26.2008

Hi everyone. I want to implement in my site a rss news reader. In my country we have a newspaper named Clarin, wich offers rss services. In example, Clarin offers [url]http://www.clarin.com/suplementos/viajes/ultimo/viajes.xml[/url] file for reading new about travels and tourism. In my site, I want to implement somehow a script that do the following:

  • – Load xml file

  • – Parse when is loaded

  • – Show news on user’s screen

    • The truth is that I’m having trouble in first step. I have this script to show the server’s response:

    <script>
    var obj = new HttpRequest();
    obj.setResponseType(1);
    obj.oncomplete = function(){
    document.getElementById(‘rss’).innerHTML = obj.getResponse();

    }
    obj.loadAsync(‘www.clarin.com/suplementos/viajes/ultimo/viajes.xml’);
    </script>

    HttpRequest is an object wich implements Ajax. This object works well. With obj.setResponseType(1) I determine that server’s response will be plain text. obj.oncomple is the function wich is executed when the ajax object is in readyState 4 (complete). obj.loadAsync is actually the function that allows me to load a file asynchronously. The code works well, but it shows the ‘Page Not Found’ screen. I check one thousand times the path of the file and it’s correct. So, what’s happening here?. Is this the way to implement rss news reader from javascript?. Regards.

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    JavaScript

    2 Comments(s) ↴

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    @A1ien51Jul 26.2008 — JavaScript has a same domain policy. It can not talk to other domains. Therefore you can not request that XML document. You would have to use a serverside proxy to fetch the XML.

    Eric
    Copy linkTweet thisAlerts:
    @rnd_meJul 27.2008 — [CODE]
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head><title>rss test</title>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    </head>
    <body onload="boot()">
    <div id='news'></div>

    <script type='text/javascript'>

    function el(tid) {return document.getElementById(tid);}
    function JSget(turl) {var xJs = document.createElement("script");xJs.type = "text/javascript";var h = document.getElementsByTagName("head");if (h && h[0]) {h[0].appendChild(xJs);}xJs.src = turl;return xJs;}
    function getFeed(feed, callback) {var src = "http://pipes.yahoo.com/pipes/9oyONQzA2xGOkM4FqGIyXQ/run?&_render=json&_callback=" + callback + "&feed=" + feed;if (feed.match && feed.match(/pipes.yahoo.com/)) {src = feed + "?_render=json&_callback=" + callback;}JSget(src);}


    function rssCallback(a) {
    var items = a.value.items;
    var output = [];
    for (var i = 0, mx = items.length; i < mx; i++) {
    var it = items[i];
    output[i] = it.title.link(it.link).bold() + " <br> " + it.pubDate + "<br>" + it.description;
    }
    el("news").innerHTML = output.join("<br><br>");
    }

    function boot(){
    getFeed("http://www.clarin.com/suplementos/viajes/ultimo/viajes.xml", "rssCallback")
    }

    </script>
    </body>
    </html>
    [/CODE]
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