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	<title>Blog cakephp en español por Hospedaxes &#187; Sindicación de noticias</title>
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	<link>http://cakephp.hospedaxes.com</link>
	<description>Blog sobre desarrollo web con cakephp en español por Hospedaxes</description>
	<lastBuildDate>Mon, 26 Apr 2010 07:11:23 +0000</lastBuildDate>
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		<title>Sindicación de noticias</title>
		<link>http://cakephp.hospedaxes.com/sindicacion-de-noticias</link>
		<comments>http://cakephp.hospedaxes.com/sindicacion-de-noticias#comments</comments>
		<pubDate>Tue, 06 May 2008 14:51:16 +0000</pubDate>
		<dc:creator>nuria</dc:creator>
				<category><![CDATA[Noticias]]></category>
		<category><![CDATA[cakephp-1.2]]></category>
		<category><![CDATA[feed]]></category>
		<category><![CDATA[RSS]]></category>
		<category><![CDATA[Sindicación de noticias]]></category>
		<category><![CDATA[sindicación web]]></category>

		<guid isPermaLink="false">http://www.hospedaxes.com/blog-cakephp/?p=16</guid>
		<description><![CDATA[Hoy vamos a explicar cómo hacer en CakePHP 1.2 un canal de sindicación de noticias o sindicación web. Es una funcionalidad que utilizamos con mucha frecuencia en nuestros diseños web y para la que Cake nos ofrece un buen soporte.
Cake nos proporciona un helper, RSSHelper, que nos permite hacer en muy pocas líneas de código [...]]]></description>
			<content:encoded><![CDATA[<p>Hoy vamos a explicar cómo hacer en <a title="CakePHP" href="http://www.cakephp.org/">CakePHP 1.2</a> un canal de <a title="Artículo acerca de la sindicación web" href="http://es.wikipedia.org/wiki/Sindicación_web">sindicación de noticias o sindicación web</a>. Es una funcionalidad que utilizamos con mucha frecuencia en nuestros <a title="Hospedaxes" href="http://www.hospedaxes.com">diseños web</a> y para la que Cake nos ofrece un buen soporte.</p>
<p>Cake nos proporciona un helper, <a title="API del RSS Helper" href="http://api.cakephp.org/1.2/class_rss_helper.html">RSSHelper</a>, que nos permite hacer en muy pocas líneas de código un RSS.</p>
<p>Lo primero que tenemos que hacer es una función en el controlador o bien utilizar la misma función index del controlador que queramos sindicar:</p>
<div class="igBar"><span id="lphp-6"><a href="#" onclick="javascript:showPlainTxt('php-6'); return false;">PLAIN TEXT</a></span></div>
<div class="syntax_hilite"><span class="langName">PHP:</span>
<div id="php-6">
<div class="php">
<ol>
<li style="font-family: 'Courier New', Courier, monospace; color: black; font-weight: normal; font-style: normal;color:#3A6A8B;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#000000; font-weight:bold;">class</span> NoticiasController extends AppController</div>
</li>
<li style="font-weight: bold;color:#26536A;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#006600; font-weight:bold;">&#123;</span></div>
</li>
<li style="font-family: 'Courier New', Courier, monospace; color: black; font-weight: normal; font-style: normal;color:#3A6A8B;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#000000; font-weight:bold;">var</span> <span style="color:#0000FF;">$helpers</span> = <a href="http://www.php.net/array"><span style="color:#000066;">array</span></a><span style="color:#006600; font-weight:bold;">&#40;</span><span style="color:#FF0000;">'Rss'</span>, <span style="color:#FF0000;">'Xml'</span><span style="color:#006600; font-weight:bold;">&#41;</span>;</div>
</li>
<li style="font-weight: bold;color:#26536A;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#000000; font-weight:bold;">var</span> <span style="color:#0000FF;">$components</span> = <a href="http://www.php.net/array"><span style="color:#000066;">array</span></a><span style="color:#006600; font-weight:bold;">&#40;</span><span style="color:#FF0000;">'RequestHandler'</span><span style="color:#006600; font-weight:bold;">&#41;</span>;</div>
</li>
<li style="font-family: 'Courier New', Courier, monospace; color: black; font-weight: normal; font-style: normal;color:#3A6A8B;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;">&nbsp;</div>
</li>
<li style="font-weight: bold;color:#26536A;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#000000; font-weight:bold;">function</span> index<span style="color:#006600; font-weight:bold;">&#40;</span><span style="color:#006600; font-weight:bold;">&#41;</span></div>
</li>
<li style="font-family: 'Courier New', Courier, monospace; color: black; font-weight: normal; font-style: normal;color:#3A6A8B;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#006600; font-weight:bold;">&#123;</span></div>
</li>
<li style="font-weight: bold;color:#26536A;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#616100;">if</span> <span style="color:#006600; font-weight:bold;">&#40;</span><span style="color:#0000FF;">$this</span>-&gt;<span style="color:#006600;">RequestHandler</span>-&gt;<span style="color:#006600;">prefers</span><span style="color:#006600; font-weight:bold;">&#40;</span><span style="color:#FF0000;">'rss'</span><span style="color:#006600; font-weight:bold;">&#41;</span><span style="color:#006600; font-weight:bold;">&#41;</span></div>
</li>
<li style="font-family: 'Courier New', Courier, monospace; color: black; font-weight: normal; font-style: normal;color:#3A6A8B;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#006600; font-weight:bold;">&#123;</span></div>
</li>
<li style="font-weight: bold;color:#26536A;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#0000FF;">$this</span>-&gt;<span style="color:#006600;">layout</span> = <span style="color:#FF0000;">'default'</span>;</div>
</li>
<li style="font-family: 'Courier New', Courier, monospace; color: black; font-weight: normal; font-style: normal;color:#3A6A8B;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#0000FF;">$this</span>-&gt;<span style="color:#006600;">set</span><span style="color:#006600; font-weight:bold;">&#40;</span><span style="color:#FF0000;">'channel'</span>,<a href="http://www.php.net/array"><span style="color:#000066;">array</span></a><span style="color:#006600; font-weight:bold;">&#40;</span></div>
</li>
<li style="font-weight: bold;color:#26536A;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#FF0000;">'title'</span> =&gt; <span style="color:#FF0000;">'Portal web - Noticias'</span>,</div>
</li>
<li style="font-family: 'Courier New', Courier, monospace; color: black; font-weight: normal; font-style: normal;color:#3A6A8B;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#FF0000;">'description'</span> =&gt; <span style="color:#FF0000;">'Sindicación de noticias de nuestro portal web'</span>,</div>
</li>
<li style="font-weight: bold;color:#26536A;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#FF0000;">'link'</span> =&gt; <span style="color:#FF0000;">'http://url_al_portal.com'</span><span style="color:#006600; font-weight:bold;">&#41;</span><span style="color:#006600; font-weight:bold;">&#41;</span>;</div>
</li>
<li style="font-family: 'Courier New', Courier, monospace; color: black; font-weight: normal; font-style: normal;color:#3A6A8B;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#0000FF;">$this</span>-&gt;<span style="color:#006600;">set</span><span style="color:#006600; font-weight:bold;">&#40;</span><span style="color:#FF0000;">'data'</span>, <span style="color:#0000FF;">$this</span>-&gt;<span style="color:#006600;">Noticia</span>-&gt;<span style="color:#006600;">findAll</span><span style="color:#006600; font-weight:bold;">&#40;</span><span style="color:#000000; font-weight:bold;">null</span>, <span style="color:#000000; font-weight:bold;">null</span>, <a href="http://www.php.net/array"><span style="color:#000066;">array</span></a><span style="color:#006600; font-weight:bold;">&#40;</span><span style="color:#FF0000;">'Noticia.fecha DESC'</span><span style="color:#006600; font-weight:bold;">&#41;</span>, <span style="color:#CC66CC;color:#800000;">10</span><span style="color:#006600; font-weight:bold;">&#41;</span><span style="color:#006600; font-weight:bold;">&#41;</span>;</div>
</li>
<li style="font-weight: bold;color:#26536A;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#006600; font-weight:bold;">&#125;</span></div>
</li>
<li style="font-family: 'Courier New', Courier, monospace; color: black; font-weight: normal; font-style: normal;color:#3A6A8B;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#616100;">else</span></div>
</li>
<li style="font-weight: bold;color:#26536A;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#006600; font-weight:bold;">&#123;</span></div>
</li>
<li style="font-family: 'Courier New', Courier, monospace; color: black; font-weight: normal; font-style: normal;color:#3A6A8B;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#FF9933; font-style:italic;">// Si no es un RSS, ponemos aquí cómo queremos que se comporte el index</span></div>
</li>
<li style="font-weight: bold;color:#26536A;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#0000FF;">$this</span>-&gt;<span style="color:#006600;">redirect</span><span style="color:#006600; font-weight:bold;">&#40;</span><span style="color:#FF0000;">"otra_funcion"</span><span style="color:#006600; font-weight:bold;">&#41;</span>;</div>
</li>
<li style="font-family: 'Courier New', Courier, monospace; color: black; font-weight: normal; font-style: normal;color:#3A6A8B;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#006600; font-weight:bold;">&#125;</span></div>
</li>
<li style="font-weight: bold;color:#26536A;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#006600; font-weight:bold;">&#125;</span></div>
</li>
<li style="font-family: 'Courier New', Courier, monospace; color: black; font-weight: normal; font-style: normal;color:#3A6A8B;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#006600; font-weight:bold;">&#125;</span> </div>
</li>
</ol>
</div>
</div>
</div>
<p>
Vemos que tuvimos que importar algunos helpers y componentes. Establecemos aquí ya el título, descripción y enlace del canal, y los datos que queremos sindicar.</p>
<p>En la capa de la vista, tenemos que definir el layout <em>default.ctp</em>, que estará en la carpeta <em>views/layout/rss</em> y será de una manera tan simple como la siguiente:</p>
<div class="igBar"><span id="lphp-7"><a href="#" onclick="javascript:showPlainTxt('php-7'); return false;">PLAIN TEXT</a></span></div>
<div class="syntax_hilite"><span class="langName">PHP:</span>
<div id="php-7">
<div class="php">
<ol>
<li style="font-family: 'Courier New', Courier, monospace; color: black; font-weight: normal; font-style: normal;color:#3A6A8B;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#000000; font-weight:bold;">&lt;?php</span></div>
</li>
<li style="font-weight: bold;color:#26536A;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><a href="http://www.php.net/echo"><span style="color:#000066;">echo</span></a> <span style="color:#0000FF;">$content_for_layout</span>;</div>
</li>
<li style="font-family: 'Courier New', Courier, monospace; color: black; font-weight: normal; font-style: normal;color:#3A6A8B;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#000000; font-weight:bold;">?&gt;</span> </div>
</li>
</ol>
</div>
</div>
</div>
<p></p>
<p>Y también definir la vista en si, que estará en nuestro caso en la carpeta views/noticias/rss y se llamará index.ctp, y que tendrá la forma:</p>
<div class="igBar"><span id="lphp-8"><a href="#" onclick="javascript:showPlainTxt('php-8'); return false;">PLAIN TEXT</a></span></div>
<div class="syntax_hilite"><span class="langName">PHP:</span>
<div id="php-8">
<div class="php">
<ol>
<li style="font-family: 'Courier New', Courier, monospace; color: black; font-weight: normal; font-style: normal;color:#3A6A8B;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#000000; font-weight:bold;">function</span> convertirRSS<span style="color:#006600; font-weight:bold;">&#40;</span><span style="color:#0000FF;">$data</span><span style="color:#006600; font-weight:bold;">&#41;</span></div>
</li>
<li style="font-weight: bold;color:#26536A;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#006600; font-weight:bold;">&#123;</span></div>
</li>
<li style="font-family: 'Courier New', Courier, monospace; color: black; font-weight: normal; font-style: normal;color:#3A6A8B;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#616100;">return</span> <a href="http://www.php.net/array"><span style="color:#000066;">array</span></a><span style="color:#006600; font-weight:bold;">&#40;</span></div>
</li>
<li style="font-weight: bold;color:#26536A;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#FF0000;">'title'</span> =&gt; <span style="color:#0000FF;">$data</span><span style="color:#006600; font-weight:bold;">&#91;</span><span style="color:#FF0000;">'Noticia'</span><span style="color:#006600; font-weight:bold;">&#93;</span><span style="color:#006600; font-weight:bold;">&#91;</span><span style="color:#FF0000;">'titulo'</span><span style="color:#006600; font-weight:bold;">&#93;</span>,</div>
</li>
<li style="font-family: 'Courier New', Courier, monospace; color: black; font-weight: normal; font-style: normal;color:#3A6A8B;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#FF0000;">'link'</span>&nbsp; =&gt; <a href="http://www.php.net/array"><span style="color:#000066;">array</span></a><span style="color:#006600; font-weight:bold;">&#40;</span><span style="color:#FF0000;">'action'</span> =&gt; <span style="color:#FF0000;">'ver'</span>, <span style="color:#0000FF;">$data</span><span style="color:#006600; font-weight:bold;">&#91;</span><span style="color:#FF0000;">'Noticia'</span><span style="color:#006600; font-weight:bold;">&#93;</span><span style="color:#006600; font-weight:bold;">&#91;</span><span style="color:#FF0000;">'url'</span><span style="color:#006600; font-weight:bold;">&#93;</span>, <span style="color:#0000FF;">$data</span><span style="color:#006600; font-weight:bold;">&#91;</span><span style="color:#FF0000;">'Noticia'</span><span style="color:#006600; font-weight:bold;">&#93;</span><span style="color:#006600; font-weight:bold;">&#91;</span><span style="color:#FF0000;">'id'</span><span style="color:#006600; font-weight:bold;">&#93;</span><span style="color:#006600; font-weight:bold;">&#41;</span>,</div>
</li>
<li style="font-weight: bold;color:#26536A;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#FF0000;">'description'</span> =&gt; <span style="color:#0000FF;">$data</span><span style="color:#006600; font-weight:bold;">&#91;</span><span style="color:#FF0000;">'Noticia'</span><span style="color:#006600; font-weight:bold;">&#93;</span><span style="color:#006600; font-weight:bold;">&#91;</span><span style="color:#FF0000;">'texto'</span><span style="color:#006600; font-weight:bold;">&#93;</span>,</div>
</li>
<li style="font-family: 'Courier New', Courier, monospace; color: black; font-weight: normal; font-style: normal;color:#3A6A8B;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#FF0000;">'pubDate'</span> =&gt; <span style="color:#0000FF;">$data</span><span style="color:#006600; font-weight:bold;">&#91;</span><span style="color:#FF0000;">'Noticia'</span><span style="color:#006600; font-weight:bold;">&#93;</span><span style="color:#006600; font-weight:bold;">&#91;</span><span style="color:#FF0000;">'fecha'</span><span style="color:#006600; font-weight:bold;">&#93;</span></div>
</li>
<li style="font-weight: bold;color:#26536A;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#006600; font-weight:bold;">&#41;</span>;</div>
</li>
<li style="font-family: 'Courier New', Courier, monospace; color: black; font-weight: normal; font-style: normal;color:#3A6A8B;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#006600; font-weight:bold;">&#125;</span></div>
</li>
<li style="font-weight: bold;color:#26536A;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><a href="http://www.php.net/echo"><span style="color:#000066;">echo</span></a> <span style="color:#0000FF;">$xml</span>-&gt;<span style="color:#006600;">header</span><span style="color:#006600; font-weight:bold;">&#40;</span><a href="http://www.php.net/array"><span style="color:#000066;">array</span></a><span style="color:#006600; font-weight:bold;">&#40;</span><span style="color:#FF0000;">'version'</span>=&gt;<span style="color:#FF0000;">'1.0'</span>, <span style="color:#FF0000;">'encoding'</span>=&gt;<span style="color:#FF0000;">'utf-8'</span><span style="color:#006600; font-weight:bold;">&#41;</span><span style="color:#006600; font-weight:bold;">&#41;</span>;</div>
</li>
<li style="font-family: 'Courier New', Courier, monospace; color: black; font-weight: normal; font-style: normal;color:#3A6A8B;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#0000FF;">$document</span> = <span style="color:#0000FF;">$rss</span>-&gt;<span style="color:#006600;">channel</span><span style="color:#006600; font-weight:bold;">&#40;</span><a href="http://www.php.net/array"><span style="color:#000066;">array</span></a><span style="color:#006600; font-weight:bold;">&#40;</span><span style="color:#006600; font-weight:bold;">&#41;</span>, <span style="color:#0000FF;">$channel</span>, <span style="color:#0000FF;">$rss</span>-&gt;<span style="color:#006600;">items</span><span style="color:#006600; font-weight:bold;">&#40;</span><span style="color:#0000FF;">$data</span>, <span style="color:#FF0000;">'convertirRSS'</span><span style="color:#006600; font-weight:bold;">&#41;</span><span style="color:#006600; font-weight:bold;">&#41;</span>;</div>
</li>
<li style="font-weight: bold;color:#26536A;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><a href="http://www.php.net/echo"><span style="color:#000066;">echo</span></a> <span style="color:#0000FF;">$rss</span>-&gt;<span style="color:#006600;">document</span><span style="color:#006600; font-weight:bold;">&#40;</span><a href="http://www.php.net/array"><span style="color:#000066;">array</span></a><span style="color:#006600; font-weight:bold;">&#40;</span><span style="color:#FF0000;">'version'</span>=&gt;<span style="color:#FF0000;">'2.0'</span><span style="color:#006600; font-weight:bold;">&#41;</span>, <span style="color:#0000FF;">$document</span><span style="color:#006600; font-weight:bold;">&#41;</span>;</div>
</li>
<li style="font-family: 'Courier New', Courier, monospace; color: black; font-weight: normal; font-style: normal;color:#3A6A8B;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;"><span style="color:#000000; font-weight:bold;">?&gt;</span> </div>
</li>
</ol>
</div>
</div>
</div>
<p></p>
<p>Ya por último, lo único que tenemos que hacer es meter en la cabecera de nuestro código html, el link, para que nos ponga en la barra del navegador el enlace a nuestro rss:</p>
<div class="igBar"><span id="lphp-9"><a href="#" onclick="javascript:showPlainTxt('php-9'); return false;">PLAIN TEXT</a></span></div>
<div class="syntax_hilite"><span class="langName">PHP:</span>
<div id="php-9">
<div class="php">
<ol>
<li style="font-family: 'Courier New', Courier, monospace; color: black; font-weight: normal; font-style: normal;color:#3A6A8B;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;">&lt;link rel=<span style="color:#FF0000;">"alternate"</span> type=<span style="color:#FF0000;">"application/rss+xml"</span> title=<span style="color:#FF0000;">"Nuestro portal web RSS Feed"</span> href=<span style="color:#FF0000;">"/noticias/index.rss"</span> /&gt; </div>
</li>
</ol>
</div>
</div>
</div>
<p></p>
<p>Y, como vemos, esta url no sigue el formato estándar de las urls que utiliza Cake, por lo que tenemos que definir en el archivo config/routes.php una regla para ello:</p>
<div class="igBar"><span id="lphp-10"><a href="#" onclick="javascript:showPlainTxt('php-10'); return false;">PLAIN TEXT</a></span></div>
<div class="syntax_hilite"><span class="langName">PHP:</span>
<div id="php-10">
<div class="php">
<ol>
<li style="font-family: 'Courier New', Courier, monospace; color: black; font-weight: normal; font-style: normal;color:#3A6A8B;">
<div style="font-family: 'Courier New', Courier, monospace; font-weight: normal;">Router::<span style="color:#006600;">parseExtensions</span><span style="color:#006600; font-weight:bold;">&#40;</span><span style="color:#006600; font-weight:bold;">&#41;</span>; </div>
</li>
</ol>
</div>
</div>
</div>
<p></p>
<p>Con esto ya tendríamos definido el RSS para nuestra aplicación.</p>
]]></content:encoded>
			<wfw:commentRss>http://cakephp.hospedaxes.com/sindicacion-de-noticias/feed</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
	</channel>
</rss>

