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		<title>URL Rewriting contra ataques ?(!)</title>
		<link>http://feedproxy.google.com/~r/joaopedropereira/~3/YHL0i-SRQgg/</link>
		<comments>http://joaopedropereira.com/blog/2010/08/27/url-rewriting-contra-ataques/#comments</comments>
		<pubDate>Fri, 27 Aug 2010 10:39:54 +0000</pubDate>
		<dc:creator>João Pedro Pereira</dc:creator>
				<category><![CDATA[Optimização]]></category>
		<category><![CDATA[SEO]]></category>
		<category><![CDATA[Segurança]]></category>
		<category><![CDATA[Webdevelopment]]></category>
		<category><![CDATA[htaccess]]></category>
		<category><![CDATA[SQL Injection]]></category>

		<guid isPermaLink="false">http://joaopedropereira.com/blog/?p=926</guid>
		<description><![CDATA[O URL Rewriting ganhou muitos adeptos quando surgiu a moda das SEO (Search Engine Optimization) e das USO (User Scan Optimization) de forma a tornar as ligações de mais fácil leitura e percepção do seu conteúdo quer para os Motores de Pesquisa quer para o scan que o nosso cérebro faz quando olha para uma [...]]]></description>
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<p>O URL Rewriting ganhou muitos adeptos quando surgiu a moda das SEO (Search Engine Optimization) e das USO (User Scan Optimization) de forma a tornar as ligações de mais fácil leitura e percepção do seu conteúdo quer para os Motores de Pesquisa quer para o scan que o nosso cérebro faz quando olha para uma ligação, e é normalmente com este intuito que é utilizado.</p>
<p>Contudo, é possível utilizar URL Rewriting para melhorar a segurança do seu site.</p>
<p style="text-align: center;"><a href="http://joaopedropereira.com/blog/wp-content/uploads/2010/08/obfuscation.jpg"><img class="aligncenter size-full wp-image-927" title="obfuscation" src="http://joaopedropereira.com/blog/wp-content/uploads/2010/08/obfuscation.jpg" alt="" width="360" height="450" /></a></p>
<p><strong>ATENÇÃO: Não é seguro confiar neste método para a obtenção de um site seguro, este é apenas um método possível de obfuscação, isto é, para tornar mais dificil de perceber onde poderão estar as falhas, principalmente para ferramentas automáticas de pentesting!</strong></p>
<p>Imaginemos o seguinte URL:</p>
<p>http://exemplo.pt/pagina.php?id=13&amp;titulo=AppVulneravel</p>
<p>Uma ferramenta automática de SQL Injection fazia parsing do URL e detectava dois parâmetros com dois valores: ( id =&gt; 13, titulo =&gt; &#8216;AppVulneravel&#8217; ) .</p>
<p>Utilizando o seguinte ficheiro .htaccess:</p>

<div class="wp_syntax"><div class="code"><pre class="htaccess" style="font-family:monospace;"># Turn on URL rewriting
RewriteEngine On
&nbsp;
# Allow any files or directories that exist to be displayed directly
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
&nbsp;
RewriteRule ^pagina/(.+)/(.+) pagina.php?id=$1&amp;amp;titulo=$2 [PT,L]</pre></div></div>

<p>Já podíamos chamar a mesma página da seguinte forma:</p>
<p>http://exemplo.pt/pagina/13/AppVulneravel</p>
<p>A mesma ferramenta automática mais dificilmente chegaria a verificar se 13 e AppVulneravel não eram directórios e estávamos a trabalhar no index desse directório.</p>
<p>Neste caso, um olhar sobre o URL e percebia-se que estava a ser usado URL Rewriting e podia-se tentar explorar vulnerabilidades a partir desses parâmetros e/ou configurado uma ferramenta para fazer os testes correctamente tendo em conta essa informação.</p>
<p>Mas um outro exemplo:</p>
<p>pagina.php</p>

<div class="wp_syntax"><div class="code"><pre class="php" style="font-family:monospace;"><span style="color: #b1b100;">include</span><span style="color: #009900;">&#40;</span><span style="color: #000088;">$_GET</span><span style="color: #009900;">&#91;</span><span style="color: #0000ff;">'file'</span><span style="color: #009900;">&#93;</span><span style="color: #339933;">.</span><span style="color: #0000ff;">'.php'</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span> <span style="color: #666666; font-style: italic;">// ATENÇÃO: Este código é altamente inseguro! Só para fins demonstrativos!</span></pre></div></div>

<p>Tirando partido do código anterior podíamos ter os seguintes URLs:</p>
<p>http://exemplo.pt/index</p>
<p>http://exemplo.pt/about</p>
<p>Sem conhecer o site em questão eu diria que teriam um ficheiro .htaccess semelhante a este:</p>

<div class="wp_syntax"><div class="code"><pre class="htaccess" style="font-family:monospace;"># Turn on URL rewriting
RewriteEngine On
&nbsp;
# Allow any files or directories that exist to be displayed directly
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
&nbsp;
RewriteRule ^(home)$ index.php [PT,L]
RewriteRule ^(about)$ about.php [PT,L]</pre></div></div>

<p>Contudo, neste contexto, seria algo mais como:</p>

<div class="wp_syntax"><div class="code"><pre class="htaccess" style="font-family:monospace;"># Turn on URL rewriting
RewriteEngine On
&nbsp;
# Allow any files or directories that exist to be displayed directly
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
&nbsp;
RewriteRule ^(.+) pagina.php?file=$1 [PT,L]</pre></div></div>

<h2>Conclusão</h2>
<p>Podemos ver que este método é excelente para dificultar a tarefa a script kiddies e crackers com ferramentas de crawling com pesquisa de vulnerabilidades, pode também diminuir os pontos de teste de possíveis atacantes, como é mostrado neste último exemplo. No entanto, é preciso ter em muita atenção o que já referi anteriormente: Não é seguro confiar neste método para a obtenção de um site seguro, este é apenas um método possível de obfuscação, isto é, para tornar mais dificil de perceber onde poderão estar as falhas, principalmente para ferramentas automáticas de pentesting!</p>


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		<title>Web Security – You’re Doing it WRONG</title>
		<link>http://feedproxy.google.com/~r/joaopedropereira/~3/r9wjkx4UCkY/</link>
		<comments>http://joaopedropereira.com/blog/2010/08/25/web-security-youre-doing-it-wrong/#comments</comments>
		<pubDate>Wed, 25 Aug 2010 10:33:20 +0000</pubDate>
		<dc:creator>João Pedro Pereira</dc:creator>
				<category><![CDATA[Segurança]]></category>
		<category><![CDATA[Webdevelopment]]></category>
		<category><![CDATA[injection]]></category>
		<category><![CDATA[sql]]></category>
		<category><![CDATA[vulnerabilidade]]></category>
		<category><![CDATA[xss]]></category>

		<guid isPermaLink="false">http://joaopedropereira.com/blog/?p=906</guid>
		<description><![CDATA[É triste o estado de descuido em que se encontram a maior parte dos WebSites nacionais&#8230; Não falo ao nível de organização, acessibilidade, usabilidade, design&#8230; mas sim ao nível da segurança, ou melhor, à falta dela&#8230; Navegar por sites de grandes empresas, de universidades e respectivas faculdades, de sites governamentais, etc. aleatoriamente é quase como [...]]]></description>
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<p style="text-align: justify;">É triste o estado de descuido em que se encontram a maior parte dos WebSites nacionais&#8230; Não falo ao nível de organização, acessibilidade, usabilidade, design&#8230; mas sim ao nível da segurança, ou melhor, à falta dela&#8230;</p>
<p style="text-align: justify;"><img class="aligncenter size-full wp-image-907" title="XSS Mosquito" src="http://joaopedropereira.com/blog/wp-content/uploads/2010/08/misquito2.jpg" alt="" width="242" height="179" /></p>
<p style="text-align: justify;">Navegar por sites de grandes empresas, de universidades e respectivas faculdades, de sites governamentais, etc. aleatoriamente é quase como encontrar a cada clique um potencial alvo de ataque, quer ao site em si só para fazer defaces estúpidos, quer para atacar os seus visitantes ou para roubar dados e bases de dados importantes.</p>
<p style="text-align: justify;">Porquê que isto acontece ? Porque é que não há cuidado em aplicar filtros nos formulários e nas querys que são feitas client-side  ? Existem já filtros desenvolvidos, open-source, que podiam ser aplicados rapidamente aquando do processo de desenvolvimento e que mais ou menos eficientes já eram algo melhor do que nada!! Não custava nem uma hora no desenvolvimento final de um website, e para empresas cujo negócio é o desenvolvimento de soluções web à medida para grandes entidades é inadmissível nunca se terem preocupado em criar uma solução por mais simples que fosse para aplicar a todos os seus trabalhos&#8230;</p>
<p style="text-align: justify;">Depois há sempre os bons da fita que quando se apercebem de alguma coisa avisam os developers do site em questão e tentam ajudar. Quando isto acontece existem três tipos de empresas / pessoas:<br />
- não ligam nenhum à sugestão dada e o site continua vulnerável<br />
- ameaçam a pessoa que os está a alertar de lhes pôr um processo em cima (aqui ainda não percebi se é com medo que se peça dinheiro ou que fale com o cliente afectado)<br />
- agradecem a sugestão, corrigem o erro e em alguns casos oferecem recompensas (dinheiro, serviços e até empregos)</p>
<p style="text-align: justify;">Eu pessoalmente já tive estas experiências e desde que as minhas boas intenções foram levadas a mal e fui ameaçado por uma grande empresa portuguesa de desenvolvimento web que deixei de me interessar por ajudar.</p>
<p style="text-align: justify;">Depois claro que aparecem sempre problemas com bases de dados com informações confidenciais roubadas, session hijacking, ou os famosos defaces.</p>
<p style="text-align: justify;">Vamos lá pessoal, não é nada de impossível, é só preciso querer. Com o mínimo de cuidado podem ser evitadas muitas situações embaraçosas para vocês, para os vossos clientes e para o público alvo dos vossos clientes.</p>
<p style="text-align: justify;"><span style="color: #c0c0c0;">Imagem de http://www.fireblog.com/</span></p>


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			<wfw:commentRss>http://joaopedropereira.com/blog/2010/08/25/web-security-youre-doing-it-wrong/feed/</wfw:commentRss>
		<slash:comments>6</slash:comments>
		<feedburner:origLink>http://joaopedropereira.com/blog/2010/08/25/web-security-youre-doing-it-wrong/</feedburner:origLink></item>
		<item>
		<title>PHP RSS Feed Generator Class</title>
		<link>http://feedproxy.google.com/~r/joaopedropereira/~3/17h2TojQGSc/</link>
		<comments>http://joaopedropereira.com/blog/2010/07/28/php-rss-feed-generator-class/#comments</comments>
		<pubDate>Tue, 27 Jul 2010 23:06:28 +0000</pubDate>
		<dc:creator>João Pedro Pereira</dc:creator>
				<category><![CDATA[PHP]]></category>
		<category><![CDATA[Projectos]]></category>
		<category><![CDATA[Webdevelopment]]></category>
		<category><![CDATA[class]]></category>
		<category><![CDATA[feed]]></category>
		<category><![CDATA[php]]></category>
		<category><![CDATA[rss]]></category>

		<guid isPermaLink="false">http://joaopedropereira.com/blog/?p=858</guid>
		<description><![CDATA[English Version &#124; Versão Portuguesa It&#8217;s been a while since I&#8217;ve planned on developing a new platform for my work as Web Developer, and next to all Web Developers, and I started to develop some modules and this RSS Generator Class born to fulfill my needs. Supported versions: RSS 2.0 Download: Download it Features: Generates [...]]]></description>
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<h2 style="text-align: center;"><a title="English Version" href="#english">English Version</a> | <a href="#portugues">Versão Portuguesa</a></h2>
<p style="text-align: center;"><a class="button" href="http://joaopedropereira.com/projects/rss_gen/rss_gen.zip"><br />
</a></p>
<hr />
<span id="english"> </span></p>
<p>It&#8217;s been a while since I&#8217;ve planned on developing a new platform for my work as Web Developer, and next to all Web Developers, and I started to develop some modules and this RSS Generator Class born to fulfill my needs.</p>
<p><span style="text-decoration: underline;">Supported versions:</span><br />
RSS 2.0</p>
<p><span style="text-decoration: underline;">Download:</span><br />
<a title="Download RSS Feed Generator Class" href="http://joaopedropereira.com/projects/rss_gen/rss_gen.zip">Download it</a></p>
<p><span style="text-decoration: underline;">Features:</span><br />
Generates RSS 2.0 feeds<br />
All feeds are validated by <a title="Feed Validator" href="http://feedvalidator.org/" target="_blank">feed validator</a><br />
Supports all feed elements<br />
Simple &amp; easy to define channel proprieties<br />
Simple &amp; easy to define item elements<br />
Enables usage of sub-tags and attributes</p>
<p><span style="text-decoration: underline;">Example </span></p>
<p>It&#8217;s a minimum &#8220;how to&#8221; example needed to understand how to use this class. It&#8217;s part of the download package.</p>

<div class="wp_syntax"><div class="code"><pre class="php" style="font-family:monospace;"><span style="color: #b1b100;">include</span><span style="color: #009900;">&#40;</span> <span style="color: #0000ff;">&quot;feed.php&quot;</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
&nbsp;
	<span style="color: #666666; font-style: italic;">//Create a new Feed</span>
	<span style="color: #000088;">$feed</span> <span style="color: #339933;">=</span> <span style="color: #000000; font-weight: bold;">new</span> Feed<span style="color: #009900;">&#40;</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
&nbsp;
	<span style="color: #666666; font-style: italic;">//Setting the channel elements</span>
	<span style="color: #666666; font-style: italic;">//Helper -&gt; http://www.rssboard.org/rss-specification</span>
	<span style="color: #000088;">$feed</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">setFeedTitle</span><span style="color: #009900;">&#40;</span> <span style="color: #0000ff;">'Demo - RSS Generator Class'</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
	<span style="color: #000088;">$feed</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">setFeedLink</span><span style="color: #009900;">&#40;</span> <span style="color: #0000ff;">'http://joaopedropereira.com/blog/rss'</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
	<span style="color: #000088;">$feed</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">setFeedDesc</span><span style="color: #009900;">&#40;</span> <span style="color: #0000ff;">'This is demo of generating a RSS feed. ONLY RSS Version 2.0 Supported'</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
	<span style="color: #000088;">$feed</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">setFeedImage</span><span style="color: #009900;">&#40;</span> <span style="color: #0000ff;">'Oh, my photo...'</span><span style="color: #339933;">,</span> <span style="color: #0000ff;">'http://joaopedropereira.com/projects/rss_gen'</span><span style="color: #339933;">,</span> <span style="color: #0000ff;">'http://s3.amazonaws.com/twitter_production/profile_images/63969619/imagemresized.jpg'</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
&nbsp;
	<span style="color: #666666; font-style: italic;">//Is possible to use setChannelElm() function for setting other optional channel elements</span>
	<span style="color: #000088;">$feed</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">setChannelElm</span><span style="color: #009900;">&#40;</span> <span style="color: #0000ff;">'language'</span><span style="color: #339933;">,</span> <span style="color: #0000ff;">'en-us'</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
&nbsp;
	<span style="color: #666666; font-style: italic;">//Create a new Item</span>
	<span style="color: #000088;">$item1</span> <span style="color: #339933;">=</span> <span style="color: #000000; font-weight: bold;">new</span> Item<span style="color: #009900;">&#40;</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
&nbsp;
	<span style="color: #666666; font-style: italic;">//Setting the Item elements</span>
	<span style="color: #666666; font-style: italic;">//Helper -&gt; http://www.rssboard.org/rss-specification</span>
	<span style="color: #000088;">$item1</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">setItemTitle</span><span style="color: #009900;">&#40;</span> <span style="color: #0000ff;">'Item nº 1'</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
	<span style="color: #000088;">$item1</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">setItemLink</span><span style="color: #009900;">&#40;</span> <span style="color: #0000ff;">'http://joaopedropereira.com'</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
	<span style="color: #000088;">$item1</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">setItemDate</span><span style="color: #009900;">&#40;</span> <span style="color: #990000;">time</span><span style="color: #009900;">&#40;</span> <span style="color: #009900;">&#41;</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
	<span style="color: #000088;">$item1</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">setItemDesc</span><span style="color: #009900;">&#40;</span> <span style="color: #0000ff;">'Bla, bla, bla, item nº 1.'</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
	<span style="color: #000088;">$item1</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">setItemEnclosure</span><span style="color: #009900;">&#40;</span> <span style="color: #0000ff;">'http://www.beardodisco.com/beatelectric/music/Loverboy12Mix.mp3'</span><span style="color: #339933;">,</span> <span style="color: #0000ff;">'17121349'</span><span style="color: #339933;">,</span> <span style="color: #0000ff;">'audio/mpeg'</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
	<span style="color: #000088;">$item1</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">setItemAuthor</span><span style="color: #009900;">&#40;</span> <span style="color: #0000ff;">'contacto@joaopedropereira.com (João Pedro Pereira)'</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
	<span style="color: #666666; font-style: italic;">//As in Channel is possible to use setItemElm() function for setting other optional item elements</span>
&nbsp;
	<span style="color: #666666; font-style: italic;">//Create another Item</span>
	<span style="color: #000088;">$item2</span> <span style="color: #339933;">=</span> <span style="color: #000000; font-weight: bold;">new</span> Item<span style="color: #009900;">&#40;</span> <span style="color: #0000ff;">'Item nº 2'</span><span style="color: #339933;">,</span> <span style="color: #0000ff;">'http://twitter.com/joaoppereira'</span><span style="color: #339933;">,</span> <span style="color: #0000ff;">'Bla, bla, bla, twitter of the owner of the blog of a webdeveloper'</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
&nbsp;
	<span style="color: #000088;">$item2</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">setItemDate</span><span style="color: #009900;">&#40;</span> <span style="color: #990000;">time</span><span style="color: #009900;">&#40;</span> <span style="color: #009900;">&#41;</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
	<span style="color: #000088;">$item2</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">setItemAuthor</span><span style="color: #009900;">&#40;</span> <span style="color: #0000ff;">'contacto@joaopedropereira.com (João Pedro Pereira)'</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
&nbsp;
	<span style="color: #666666; font-style: italic;">//Adding both created items</span>
	<span style="color: #000088;">$feed</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">addItem</span><span style="color: #009900;">&#40;</span> <span style="color: #000088;">$item1</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
	<span style="color: #000088;">$feed</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">addItem</span><span style="color: #009900;">&#40;</span> <span style="color: #000088;">$item2</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
&nbsp;
	<span style="color: #666666; font-style: italic;">//Now we're ready to generate the Feed, Awesome!</span>
	<span style="color: #000088;">$feed</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">genFeed</span><span style="color: #009900;">&#40;</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span></pre></div></div>

<p style="text-align: center;"><a class="button" href="http://joaopedropereira.com/projects/rss_gen/rss_gen.zip">Download</a> | <a class="button" href="http://joaopedropereira.com/projects/rss_gen/">Demo</a></p>
<p><img src="http://joaopedropereira.com/blog/wp-content/uploads/2010/07/Demo-RSS-Generator-Class_1280270120429-w640-h480.png" alt="" title="Demo - RSS Feed Generator Class" width="640" height="311" class="aligncenter size-full wp-image-886" /></p>
<p style="text-align: center;"><a class="button" href="http://joaopedropereira.com/projects/rss_gen/rss_gen.zip">Download</a> | <a class="button" href="http://joaopedropereira.com/projects/rss_gen/">Demo</a></p>
<p><strong>EDIT</strong></p>
<p>HOT NEWS, PHP XML-RSS Feed Generator Was Accepted on <a class="button" href="http://www.phpclasses.org/package/6394-PHP-Generate-RSS-2-0-feeds.html">PHPClasses.org</a>!!</p>
<hr />
<p><span id="portugues"> </span></p>
<p>Há já algum tempo que pretendo desenvolver uma nova plataforma para o meu trabalho como Web Developer, e numa fase posterior abrir como serviço para todos os Web Developers, e por isso comecei a desenvolver alguns módulos para essa plataforma, trabalho que deu, entre outros, no módulo de RSS Feed&#8217;s surgindo assim a RSS Generator Class para satisfazer as necessidades.</p>
<p><span style="text-decoration: underline;">Versões Suportadas:</span><br />
RSS 2.0</p>
<p><span style="text-decoration: underline;">Download:</span><br />
<a title="Download RSS Feed Generator Class" href="http://joaopedropereira.com/projects/rss_gen/rss_gen.zip">Download it</a></p>
<p><span style="text-decoration: underline;">Funcionalidades:</span><br />
Gera RSS Feeds versão 2.0<br />
As feeds são válidas conforme o <a title="Feed Validator" href="http://feedvalidator.org/" target="_blank">feed validator</a><br />
Suporta todos os elementos quer dos channel&#8217;s quer dos item&#8217;s<br />
É simples definir as propriedades do channel<br />
É simples definir as propriedades dos items</p>
<p>É possível utilizar sub-tags e atributos</p>
<p><span style="text-decoration: underline;">Exemplo</span></p>
<p>Um pequeno exemplo que mostra como se pode fazer uso desta classe. Faz parte do pacote disponível para download.</p>

<div class="wp_syntax"><div class="code"><pre class="php" style="font-family:monospace;"><span style="color: #b1b100;">include</span><span style="color: #009900;">&#40;</span> <span style="color: #0000ff;">&quot;feed.php&quot;</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
&nbsp;
	<span style="color: #666666; font-style: italic;">//Create a new Feed</span>
	<span style="color: #000088;">$feed</span> <span style="color: #339933;">=</span> <span style="color: #000000; font-weight: bold;">new</span> Feed<span style="color: #009900;">&#40;</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
&nbsp;
	<span style="color: #666666; font-style: italic;">//Setting the channel elements</span>
	<span style="color: #666666; font-style: italic;">//Helper -&gt; http://www.rssboard.org/rss-specification</span>
	<span style="color: #000088;">$feed</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">setFeedTitle</span><span style="color: #009900;">&#40;</span> <span style="color: #0000ff;">'Demo - RSS Generator Class'</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
	<span style="color: #000088;">$feed</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">setFeedLink</span><span style="color: #009900;">&#40;</span> <span style="color: #0000ff;">'http://joaopedropereira.com/blog/rss'</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
	<span style="color: #000088;">$feed</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">setFeedDesc</span><span style="color: #009900;">&#40;</span> <span style="color: #0000ff;">'This is demo of generating a RSS feed. ONLY RSS Version 2.0 Supported'</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
	<span style="color: #000088;">$feed</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">setFeedImage</span><span style="color: #009900;">&#40;</span> <span style="color: #0000ff;">'Oh, my photo...'</span><span style="color: #339933;">,</span> <span style="color: #0000ff;">'http://joaopedropereira.com/projects/rss_gen'</span><span style="color: #339933;">,</span> <span style="color: #0000ff;">'http://s3.amazonaws.com/twitter_production/profile_images/63969619/imagemresized.jpg'</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
&nbsp;
	<span style="color: #666666; font-style: italic;">//Is possible to use setChannelElm() function for setting other optional channel elements</span>
	<span style="color: #000088;">$feed</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">setChannelElm</span><span style="color: #009900;">&#40;</span> <span style="color: #0000ff;">'language'</span><span style="color: #339933;">,</span> <span style="color: #0000ff;">'en-us'</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
&nbsp;
	<span style="color: #666666; font-style: italic;">//Create a new Item</span>
	<span style="color: #000088;">$item1</span> <span style="color: #339933;">=</span> <span style="color: #000000; font-weight: bold;">new</span> Item<span style="color: #009900;">&#40;</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
&nbsp;
	<span style="color: #666666; font-style: italic;">//Setting the Item elements</span>
	<span style="color: #666666; font-style: italic;">//Helper -&gt; http://www.rssboard.org/rss-specification</span>
	<span style="color: #000088;">$item1</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">setItemTitle</span><span style="color: #009900;">&#40;</span> <span style="color: #0000ff;">'Item nº 1'</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
	<span style="color: #000088;">$item1</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">setItemLink</span><span style="color: #009900;">&#40;</span> <span style="color: #0000ff;">'http://joaopedropereira.com'</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
	<span style="color: #000088;">$item1</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">setItemDate</span><span style="color: #009900;">&#40;</span> <span style="color: #990000;">time</span><span style="color: #009900;">&#40;</span> <span style="color: #009900;">&#41;</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
	<span style="color: #000088;">$item1</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">setItemDesc</span><span style="color: #009900;">&#40;</span> <span style="color: #0000ff;">'Bla, bla, bla, item nº 1.'</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
	<span style="color: #000088;">$item1</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">setItemEnclosure</span><span style="color: #009900;">&#40;</span> <span style="color: #0000ff;">'http://www.beardodisco.com/beatelectric/music/Loverboy12Mix.mp3'</span><span style="color: #339933;">,</span> <span style="color: #0000ff;">'17121349'</span><span style="color: #339933;">,</span> <span style="color: #0000ff;">'audio/mpeg'</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
	<span style="color: #000088;">$item1</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">setItemAuthor</span><span style="color: #009900;">&#40;</span> <span style="color: #0000ff;">'contacto@joaopedropereira.com (João Pedro Pereira)'</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
	<span style="color: #666666; font-style: italic;">//As in Channel is possible to use setItemElm() function for setting other optional item elements</span>
&nbsp;
	<span style="color: #666666; font-style: italic;">//Create another Item</span>
	<span style="color: #000088;">$item2</span> <span style="color: #339933;">=</span> <span style="color: #000000; font-weight: bold;">new</span> Item<span style="color: #009900;">&#40;</span> <span style="color: #0000ff;">'Item nº 2'</span><span style="color: #339933;">,</span> <span style="color: #0000ff;">'http://twitter.com/joaoppereira'</span><span style="color: #339933;">,</span> <span style="color: #0000ff;">'Bla, bla, bla, twitter of the owner of the blog of a webdeveloper'</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
&nbsp;
	<span style="color: #000088;">$item2</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">setItemDate</span><span style="color: #009900;">&#40;</span> <span style="color: #990000;">time</span><span style="color: #009900;">&#40;</span> <span style="color: #009900;">&#41;</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
	<span style="color: #000088;">$item2</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">setItemAuthor</span><span style="color: #009900;">&#40;</span> <span style="color: #0000ff;">'contacto@joaopedropereira.com (João Pedro Pereira)'</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
&nbsp;
	<span style="color: #666666; font-style: italic;">//Adding both created items</span>
	<span style="color: #000088;">$feed</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">addItem</span><span style="color: #009900;">&#40;</span> <span style="color: #000088;">$item1</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
	<span style="color: #000088;">$feed</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">addItem</span><span style="color: #009900;">&#40;</span> <span style="color: #000088;">$item2</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
&nbsp;
	<span style="color: #666666; font-style: italic;">//Now we're ready to generate the Feed, Awesome!</span>
	<span style="color: #000088;">$feed</span><span style="color: #339933;">-&gt;</span><span style="color: #004000;">genFeed</span><span style="color: #009900;">&#40;</span> <span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span></pre></div></div>

<p style="text-align: center;"><a href="http://joaopedropereira.com/projects/rss_gen/rss_gen.zip">Download</a> | <a href="http://joaopedropereira.com/projects/rss_gen/">Demo</a></p>
<p><strong>EDIT</strong></p>
<p>HOT NEWS, PHP XML-RSS Feed Generator foi aceite no <a class="button" href="http://www.phpclasses.org/package/6394-PHP-Generate-RSS-2-0-feeds.html">PHPClasses.org</a>!!</p>


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		<title>PHP Simple Events System Overview</title>
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		<comments>http://joaopedropereira.com/blog/2010/07/21/php-simple-events-system-overview/#comments</comments>
		<pubDate>Wed, 21 Jul 2010 18:30:41 +0000</pubDate>
		<dc:creator>scorch</dc:creator>
				<category><![CDATA[PHP]]></category>
		<category><![CDATA[Projectos]]></category>
		<category><![CDATA[Webdevelopment]]></category>
		<category><![CDATA[AJAX]]></category>
		<category><![CDATA[eventos]]></category>
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		<category><![CDATA[OOP]]></category>
		<category><![CDATA[php]]></category>

		<guid isPermaLink="false">http://joaopedropereira.com/blog/?p=817</guid>
		<description><![CDATA[O PHP-SimpleEventsSystem é uma simples classe em PHP que permite a qualquer programador criar uma aplicação orientada a eventos em PHP. Sendo assim, esta classe possibilita a criação mais facilmente de aplicações web com possibilidade de adicionar plugins, sem que estes tenham de mexer com o código interno da aplicação, permite que uma framework use [...]]]></description>
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<p>O PHP-SimpleEventsSystem é uma simples classe em PHP que permite a qualquer programador criar uma aplicação orientada a eventos em PHP. Sendo assim, esta classe possibilita a criação mais facilmente de aplicações web com possibilidade de adicionar plugins, sem que estes tenham de mexer com o código interno da aplicação, permite que uma framework use internamente a classe PHP-SES e melhorando consideravelmente a interacção entre a framework e a aplicação. Mas permite muito mais, permite até onde a sua imaginação chegar. <img src='http://joaopedropereira.com/blog/wp-includes/images/smilies/icon_biggrin.gif' alt=':D' class='wp-smiley' /> </p>
<h2>Basic Overview</h2>
<p>Quem quiser ver a documentação completa da framework, pode aceder <a href="http://www.wiki.portugal-a-programar.org/php:tutoriais:php-ses_basicos" target="_blank">aqui</a>. No entanto, aqui vai ficar uma explicação da classe e de como ela funciona, que é bastante simples.</p>
<p>A classe cria um array multi-dimensional onde guarda as funções e o respectivo evento a que elas foram anexadas. Sempre que se anexa uma função, a classe pode ou não verificar se a função existe, conforme os parâmetros que o programador introduzir. Se passar nesse teste, verifica se a função já está anexada a esse mesmo evento,  e só depois anexa a função (as funções caso seja um array).</p>
<p>Ao executar-mos um determinado evento, a classe verifica se este existe, e em caso afirmativo, percorre o array com as funções anexadas a esse evento, e executa-as a todas pela ordem com que forma anexadas. Caso a opção Auto_run esteja activa, a função vai ainda percorrer todas as funções definidas pelo utilizador (programador da aplicação, utilizador da classe entenda-se) e verifica se alguma coincide com a formatação obrigatória e com o nome do evento em questão (<span style="text-decoration: underline">um_nome_qualquer<strong>_handles_</strong>nome_do_evento</span>). Se essa função já estiver anexada ao array, e por consequente já tiver sido executada, a classe não a executa novamente. Se ainda não estiver anexada, a classe executa-a e, caso a opção Auto_index esteja activa, indexa a função ao array do respectivo evento.</p>
<h2>Sugestões de sintaxe dos nomes dos eventos</h2>
<p>Numa aplicação de grandes dimensões torna-se importante a sintaxe que usamos e a forma como organizamos os nomes dos eventos, para que não existam conflitos e seja mais fácil memorizar o grande número de eventos que uma aplicação possa ter. Para isso os nomes dos eventos necessitam de ter lógica, e apesar de serem um pouco compridos, serão óbvios. Primeiro teremos de ter em conta algumas considerações.<br />
Os nomes dos eventos podem conter qualquer carácter, incluindo pontos, que podem servir de separador entre as várias &#8220;secções virtuais&#8221; do nome do evento. No entanto nomes de eventos com pontos não serão possíveis de aceder através da funcionalidade Auto-Index e Auto-Run pois as funções não suportam, obviamente, este tipo de caracteres no seu nome. Assim sendo, sugiro o uso do <em>underscore</em> como separador.<br />
Em todas as aplicações há uma &#8220;secção&#8221; que deve existir em todos os eventos, que indica se o evento retrata alguma acção em PHP ou HTML. Ou seja, e apesar de todas as instruções em código PHP sejam de PHP, poderão existir eventos que retratam a impressão de texto para o browser, e assim sendo, o nome do evento deve começar por <strong>html_</strong>, senão, caso retratem acções PHP, como uma conexão a uma Base de Dados, a leitura de um ficheiro, o fim de um ciclo, a execução de uma qualquer estrutura de controlo, etc., deverão começar por <strong>php_</strong>.<br />
Para a secção de HTML, podemos ainda destinguir se nos estamos a referir a alguma parte genérica do HTML, como por exemplo, um menu, que seja constituído por vários elementos HTML, deve-se adicionar um <strong>generic_</strong> a seguir ao <strong>html_</strong>, ou seja, ficaria <strong>html_generic_menu</strong>, por exemplo.<br />
Caso seja em PHP, deve-se adicionar o nome da &#8220;categoria&#8221; da acção que se está a utilizar. Por exemplo se for uma acção qualquer relacionada com a base de dados MySQL, como inserir um registo, coloca-se o <strong>mysq_</strong> depois do <strong>php_</strong>, ficando, por exemplo, <strong>php_mysql_query_insert_user</strong>.</p>
<p><span style="text-decoration: underline"><strong>Nota:</strong></span> Isto é apenas um exemplo de nomenclatura dos eventos, nada de obrigatório.</p>
<h2>Exemplos e Demos</h2>
<h3>Plugins</h3>
<p>Actualmente, é quase obrigatório qualquer aplicação, seja ela Web ou Desktop, suportar plugins. Só que isto é muitas vezes uma fonte de dor de cabeça para quem programa em PHP, criar um sistema versátil suficiente para suportar plugins. O PHP-SES permite a criação de Aplicações Web que facilmente suportam plugins. Vamos ver o seguinte exemplo.</p>

<div class="wp_syntax"><div class="code"><pre class="php" style="font-family:monospace;"><span style="color: #b1b100;">require</span><span style="color: #009900;">&#40;</span><span style="color: #0000ff;">&quot;..\..\Events.php&quot;</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
&nbsp;
<span style="color: #666666; font-style: italic;">//Inicia a configuração</span>
Events<span style="color: #339933;">::</span><span style="color: #004000;">setConf</span><span style="color: #009900;">&#40;</span><span style="color: #0000ff;">&quot;Auto_run&quot;</span><span style="color: #339933;">,</span> <span style="color: #009900; font-weight: bold;">true</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
Events<span style="color: #339933;">::</span><span style="color: #004000;">setConf</span><span style="color: #009900;">&#40;</span><span style="color: #0000ff;">&quot;Auto_index&quot;</span><span style="color: #339933;">,</span> <span style="color: #009900; font-weight: bold;">true</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
&nbsp;
<span style="color: #666666; font-style: italic;">//Carrega os nomes ficheiros dos plugins.</span>
<span style="color: #000088;">$plugins</span> <span style="color: #339933;">=</span> <span style="color: #990000;">scandir</span><span style="color: #009900;">&#40;</span><span style="color: #0000ff;">&quot;plugins&quot;</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
&nbsp;
<span style="color: #666666; font-style: italic;">//Percorre o array com todos os ficheiros de plugins</span>
<span style="color: #b1b100;">foreach</span> <span style="color: #009900;">&#40;</span><span style="color: #000088;">$plugins</span> <span style="color: #b1b100;">as</span> <span style="color: #000088;">$index</span><span style="color: #339933;">=&gt;</span> <span style="color: #000088;">$file_name</span><span style="color: #009900;">&#41;</span><span style="color: #009900;">&#123;</span>
        <span style="color: #666666; font-style: italic;">//Verifica se o index actual é um ficheiro e não uma pasta</span>
        <span style="color: #b1b100;">if</span> <span style="color: #009900;">&#40;</span><span style="color: #990000;">is_file</span><span style="color: #009900;">&#40;</span><span style="color: #0000ff;">&quot;plugins/&quot;</span><span style="color: #339933;">.</span><span style="color: #000088;">$file_name</span><span style="color: #009900;">&#41;</span><span style="color: #009900;">&#41;</span><span style="color: #009900;">&#123;</span>
                <span style="color: #666666; font-style: italic;">//Inclui e executa o plugin</span>
                <span style="color: #b1b100;">require</span><span style="color: #009900;">&#40;</span><span style="color: #0000ff;">&quot;plugins/&quot;</span><span style="color: #339933;">.</span><span style="color: #000088;">$file_name</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
                <span style="color: #666666; font-style: italic;">//Por uma questão de segurança e para não comprometer o funcionamento da aplicação</span>
                <span style="color: #666666; font-style: italic;">//Depois de se carregar um plugin deve-se sempre habilitar a classe</span>
                <span style="color: #666666; font-style: italic;">//Para não se dar o caso de algum plugin a desabilitar e não a habilitar novamente.</span>
                Events<span style="color: #339933;">::</span><span style="color: #004000;">Enable</span><span style="color: #009900;">&#40;</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
        <span style="color: #009900;">&#125;</span>
<span style="color: #009900;">&#125;</span>
&nbsp;
&nbsp;
<span style="color: #b1b100;">echo</span> <span style="color: #0000ff;">'&lt; !DOCTYPE html PUBLIC &quot;-//W3C//DTD XHTML 1.0 Transitional//EN&quot; &quot;http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd&quot;&gt;
&lt;html xmlns=&quot;http://www.w3.org/1999/xhtml&quot;&gt;
&lt;head&gt;
        &lt;meta http-equiv=&quot;Content-Type&quot; content=&quot;text/html; charset=iso-8856-16&quot; /&gt;'</span><span style="color: #339933;">;</span>
        <span style="color: #666666; font-style: italic;">//Declara uma variável que permitirá adicionar conteúdo dentro dos plugins para a página</span>
        <span style="color: #000088;">$content</span> <span style="color: #339933;">=</span> <span style="color: #0000ff;">&quot;&quot;</span><span style="color: #339933;">;</span>
        <span style="color: #666666; font-style: italic;">//Corre todos os eventos anexados para quando os headers HTML são mostrados</span>
        <span style="color: #666666; font-style: italic;">//Esta é apenas um exemplo da sintaxe para o nome dos eventos.</span>
        Events<span style="color: #339933;">::</span><span style="color: #004000;">Run</span><span style="color: #009900;">&#40;</span><span style="color: #0000ff;">&quot;html_headers&quot;</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
        <span style="color: #b1b100;">echo</span> <span style="color: #000088;">$content</span><span style="color: #339933;">;</span>
        <span style="color: #b1b100;">echo</span> <span style="color: #0000ff;">'&lt;title&gt;'</span><span style="color: #339933;">;</span>
&nbsp;
        <span style="color: #000088;">$content</span> <span style="color: #339933;">=</span> <span style="color: #0000ff;">&quot;PHP-SES Plugins Example&quot;</span><span style="color: #339933;">;</span>
&nbsp;
        Events<span style="color: #339933;">::</span><span style="color: #004000;">Run</span><span style="color: #009900;">&#40;</span><span style="color: #0000ff;">&quot;html_show_title&quot;</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
        <span style="color: #b1b100;">echo</span> <span style="color: #000088;">$content</span><span style="color: #339933;">.</span><span style="color: #0000ff;">'&lt;/title&gt;
&lt;/head&gt;&lt;body&gt;'</span><span style="color: #339933;">;</span>
&nbsp;
<span style="color: #b1b100;">echo</span> <span style="color: #0000ff;">&quot;&lt;h1&gt;Título&lt;/h1&gt;&quot;</span><span style="color: #339933;">;</span>
&nbsp;
<span style="color: #000088;">$content</span> <span style="color: #339933;">=</span> <span style="color: #0000ff;">&quot;&lt;a href=<span style="color: #000099; font-weight: bold;">\&quot;</span>#<span style="color: #000099; font-weight: bold;">\&quot;</span>&gt;Link1&lt;/a&gt;&lt;br /&gt;&quot;</span><span style="color: #339933;">;</span>
<span style="color: #666666; font-style: italic;">//Aqui corre os eventos que permitem alterar o menu</span>
Events<span style="color: #339933;">::</span><span style="color: #004000;">Run</span><span style="color: #009900;">&#40;</span><span style="color: #0000ff;">&quot;html_generic_body_menu&quot;</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
&nbsp;
<span style="color: #b1b100;">echo</span> <span style="color: #000088;">$content</span><span style="color: #339933;">;</span>
<span style="color: #b1b100;">echo</span> <span style="color: #0000ff;">'&lt;/body&gt;
&lt;/html&gt;
'</span></pre></div></div>

<h3>JavaScript Events</h3>
<p>Muitas vezes torna-se cansativo estar a chamar vários exemplos por AJAX, ou até fazer a verificação no PHP através de QueryStrings. Assim sendo, e com este exemplo aplicado, basta, no evento JavaScript, chamar uma função, JavaScript também, o nome do evento em PHP, e depois é só ir adicionando funções PHP ao código PHP.</p>
<p><strong>index.php</strong></p>

<div class="wp_syntax"><div class="code"><pre class="html4strict" style="font-family:monospace;"><span style="color: #009900;">&lt; ?php </span>
<span style="color: #009900;">require<span style="color: #66cc66;">&#40;</span><span style="color: #ff0000;">&quot;..\..\Events.php&quot;</span><span style="color: #66cc66;">&#41;</span>;</span>
&nbsp;
<span style="color: #009900;">?&gt;</span>
<span style="color: #009900;">&lt; !DOCTYPE html PUBLIC <span style="color: #ff0000;">&quot;-//W3C//DTD XHTML 1.0 Transitional//EN&quot;</span> <span style="color: #ff0000;">&quot;http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd&quot;</span>&gt;</span>
<span style="color: #009900;">&lt;<span style="color: #000000; font-weight: bold;">html</span> xmlns<span style="color: #66cc66;">=</span><span style="color: #ff0000;">&quot;http://www.w3.org/1999/xhtml&quot;</span>&gt;</span>
<span style="color: #009900;">&lt;<span style="color: #000000; font-weight: bold;">head</span>&gt;</span>
        <span style="color: #009900;">&lt;<span style="color: #000000; font-weight: bold;">meta</span> <span style="color: #000066;">http-equiv</span><span style="color: #66cc66;">=</span><span style="color: #ff0000;">&quot;Content-Type&quot;</span> <span style="color: #000066;">content</span><span style="color: #66cc66;">=</span><span style="color: #ff0000;">&quot;text/html; charset=iso-8856-16&quot;</span> <span style="color: #66cc66;">/</span>&gt;</span>
        <span style="color: #009900;">&lt;<span style="color: #000000; font-weight: bold;">script</span> <span style="color: #000066;">type</span><span style="color: #66cc66;">=</span><span style="color: #ff0000;">&quot;text/javascript&quot;</span>&gt;</span>
        function RunEvent(event_name){
&nbsp;
                if (window.XMLHttpRequest){// code for IE7+, Firefox, Chrome, Opera, Safari
                        xmlhttp=new XMLHttpRequest();
                } else {// code for IE6, IE5
                        xmlhttp=new ActiveXObject(&quot;Microsoft.XMLHTTP&quot;);
                }
&nbsp;
                xmlhttp.onreadystatechange=function(){
                        if (xmlhttp.readyState==4 <span style="color: #ddbb00;">&amp;&amp; xmlhttp.status==200){</span>
<span style="color: #ddbb00;">                                document.getElementById(&quot;count_number&quot;).innerHTML=xmlhttp.responseText;</span>
                        }
                }
&nbsp;
                xmlhttp.open(&quot;GET&quot;,&quot;run.php?event=&quot; + event_name + &quot;&quot;,true);
                xmlhttp.send();
        }
        <span style="color: #009900;">&lt;<span style="color: #66cc66;">/</span><span style="color: #000000; font-weight: bold;">script</span>&gt;</span>
        <span style="color: #009900;">&lt;<span style="color: #000000; font-weight: bold;">title</span>&gt;</span>JavaScript Buttons Example<span style="color: #009900;">&lt;<span style="color: #66cc66;">/</span><span style="color: #000000; font-weight: bold;">title</span>&gt;</span>
        <span style="color: #009900;">&lt;<span style="color: #66cc66;">/</span><span style="color: #000000; font-weight: bold;">head</span>&gt;</span>
        <span style="color: #009900;">&lt;<span style="color: #000000; font-weight: bold;">body</span>&gt;</span>
        <span style="color: #009900;">&lt;<span style="color: #000000; font-weight: bold;">input</span> <span style="color: #000066;">type</span><span style="color: #66cc66;">=</span><span style="color: #ff0000;">&quot;button&quot;</span> <span style="color: #000066;">name</span><span style="color: #66cc66;">=</span><span style="color: #ff0000;">&quot;btn_sample&quot;</span> <span style="color: #000066;">id</span><span style="color: #66cc66;">=</span><span style="color: #ff0000;">&quot;btn_sample&quot;</span> <span style="color: #000066;">onclick</span><span style="color: #66cc66;">=</span><span style="color: #ff0000;">&quot;RunEvent('html_buttons_click_btn_sample')&quot;</span>  <span style="color: #000066;">value</span><span style="color: #66cc66;">=</span><span style="color: #ff0000;">&quot;Test me. Click me.&quot;</span> <span style="color: #66cc66;">/</span>&gt;</span>
        <span style="color: #009900;">&lt;<span style="color: #000000; font-weight: bold;">div</span> <span style="color: #000066;">id</span><span style="color: #66cc66;">=</span><span style="color: #ff0000;">&quot;count_number&quot;</span>&gt;</span>0<span style="color: #009900;">&lt;<span style="color: #66cc66;">/</span><span style="color: #000000; font-weight: bold;">div</span>&gt;</span>
        <span style="color: #009900;">&lt;<span style="color: #66cc66;">/</span><span style="color: #000000; font-weight: bold;">body</span>&gt;</span>
        <span style="color: #009900;">&lt;<span style="color: #66cc66;">/</span><span style="color: #000000; font-weight: bold;">html</span>&gt;</span></pre></div></div>

<p><strong>run.php</strong></p>

<div class="wp_syntax"><div class="code"><pre class="php" style="font-family:monospace;">&nbsp;
<span style="color: #b1b100;">require</span><span style="color: #009900;">&#40;</span><span style="color: #0000ff;">&quot;..\..\Events.php&quot;</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
&nbsp;
<span style="color: #b1b100;">if</span> <span style="color: #009900;">&#40;</span><span style="color: #339933;">!</span><span style="color: #990000;">defined</span><span style="color: #009900;">&#40;</span>IS_AUTH<span style="color: #009900;">&#41;</span><span style="color: #009900;">&#41;</span><span style="color: #009900;">&#123;</span>
        <span style="color: #990000;">exit</span><span style="color: #339933;">;</span>
<span style="color: #009900;">&#125;</span>
&nbsp;
<span style="color: #666666; font-style: italic;">//Se a variável $_GET[&quot;event&quot;] não estiver declarada, termina a execução da página.</span>
<span style="color: #b1b100;">if</span> <span style="color: #009900;">&#40;</span><span style="color: #339933;">!</span><span style="color: #990000;">isset</span><span style="color: #009900;">&#40;</span><span style="color: #000088;">$_GET</span><span style="color: #009900;">&#91;</span><span style="color: #0000ff;">&quot;event&quot;</span><span style="color: #009900;">&#93;</span><span style="color: #009900;">&#41;</span><span style="color: #009900;">&#41;</span><span style="color: #009900;">&#123;</span>
        <span style="color: #b1b100;">echo</span> <span style="color: #0000ff;">&quot;Não foi definido nenhum evento.&quot;</span><span style="color: #339933;">;</span>
        <span style="color: #990000;">exit</span><span style="color: #339933;">;</span>
<span style="color: #009900;">&#125;</span>
&nbsp;
<span style="color: #666666; font-style: italic;">//Define algumas configurações para não ser necessário anexar a função.</span>
Events<span style="color: #339933;">::</span><span style="color: #004000;">setConf</span><span style="color: #009900;">&#40;</span><span style="color: #0000ff;">&quot;Auto_run&quot;</span><span style="color: #339933;">,</span> <span style="color: #009900; font-weight: bold;">true</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
Events<span style="color: #339933;">::</span><span style="color: #004000;">setConf</span><span style="color: #009900;">&#40;</span><span style="color: #0000ff;">&quot;Auto_index&quot;</span><span style="color: #339933;">,</span> <span style="color: #009900; font-weight: bold;">true</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
&nbsp;
<span style="color: #666666; font-style: italic;">//Declara uma função anexada ao clique do botão</span>
<span style="color: #000000; font-weight: bold;">function</span> update_file_handles_html_buttons_click_btn_sample <span style="color: #009900;">&#40;</span><span style="color: #009900;">&#41;</span><span style="color: #009900;">&#123;</span>
        <span style="color: #666666; font-style: italic;">//Vai buscar o número de clicks que o botão já tem</span>
        <span style="color: #000088;">$number_clicks</span> <span style="color: #339933;">=</span> <span style="color: #990000;">file_get_contents</span><span style="color: #009900;">&#40;</span><span style="color: #0000ff;">&quot;clicks.txt&quot;</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
&nbsp;
        <span style="color: #666666; font-style: italic;">//Escreve outra vez para o ficheiro adicionando um clique</span>
        <span style="color: #990000;">file_put_contents</span><span style="color: #009900;">&#40;</span><span style="color: #0000ff;">&quot;clicks.txt&quot;</span><span style="color: #339933;">,</span> <span style="color: #000088;">$number_clicks</span> <span style="color: #339933;">+</span> <span style="color: #cc66cc;">1</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span>
        <span style="color: #b1b100;">echo</span> <span style="color: #000088;">$number_clicks</span> <span style="color: #339933;">+</span> <span style="color: #cc66cc;">1</span><span style="color: #339933;">;</span>
<span style="color: #009900;">&#125;</span>
&nbsp;
<span style="color: #666666; font-style: italic;">//Corre todos os eventos associados ao clique do botão.</span>
Events<span style="color: #339933;">::</span><span style="color: #004000;">Run</span><span style="color: #009900;">&#40;</span><span style="color: #000088;">$_GET</span><span style="color: #009900;">&#91;</span><span style="color: #0000ff;">&quot;event&quot;</span><span style="color: #009900;">&#93;</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span></pre></div></div>

<p>Pode ver os exemplos em funcionamento, aceda <a href="http://scorchserver.freehosting.com/php_ses_examples/">aqui</a>.</p>


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		<item>
		<title>Não desaproveite o seu Footer!</title>
		<link>http://feedproxy.google.com/~r/joaopedropereira/~3/lrusWwQ3KSU/</link>
		<comments>http://joaopedropereira.com/blog/2010/06/03/nao-desaproveite-o-seu-footer/#comments</comments>
		<pubDate>Thu, 03 Jun 2010 22:08:57 +0000</pubDate>
		<dc:creator>João Pedro Pereira</dc:creator>
				<category><![CDATA[Optimização]]></category>
		<category><![CDATA[Usabilidade]]></category>
		<category><![CDATA[Webdevelopment]]></category>
		<category><![CDATA[footer]]></category>
		<category><![CDATA[sitemap]]></category>
		<category><![CDATA[social]]></category>

		<guid isPermaLink="false">http://joaopedropereira.com/blog/?p=800</guid>
		<description><![CDATA[Ser WebDeveloper não é uma tarefa fácil, não só temos de estar sempre actualizados relativamente ao que o mercado de trabalho exige relativamente a conhecimentos em ferramentas, frameworks e linguagens de programação como também temos de estar em cima dos hot topics na área do WebDesign e Usabilidade. Construir um site do zero não é [...]]]></description>
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<p>Ser WebDeveloper não é uma tarefa fácil, não só temos de estar sempre actualizados relativamente ao que o mercado de trabalho exige relativamente a conhecimentos em ferramentas, frameworks e linguagens de programação como também temos de estar em cima dos hot topics na área do WebDesign e Usabilidade.</p>
<p>Construir um site do zero não é uma tarefa simples, pois exige muito planeamento, estruturação e pensamento criativo e ser criativo é muitas vezes uma dor de cabeça pois quando mais precisamos da nossa amiga criatividade ela pode não aparecer&#8230; E é preciso saber estimulá-la.</p>
<p>Tenho visto na Web Portuguesa bons sites a desaproveitar algumas áreas do site, e neste artigo vou referir-me ao footer.</p>
<p>Além do típico Acordo de Privacidade e Informações Legais (que é sempre uma boa forma de aproveitar o espaço) existem algum conteúdo especifico que pode e deve ser usado no footer.</p>
<p><img class="aligncenter size-medium wp-image-801" title="Sitemap" src="http://joaopedropereira.com/blog/wp-content/uploads/2010/06/inside_sitemap-222x300.jpg" alt="Sitemap" width="222" height="300" /><strong> Sitemap</strong> &#8211; É uma excelente forma de utilizar o espaço do footer pois é útil para os visitantes que se encontrem perdidos ou que simplesmente tenham pressa para encontrar o que procuram sem terem de fazer um scanning por todo o conteúdo do site, que pode ser moroso e por consequência pode fazer-nos perder utilizadores e possíveis clientes. Ninguém gosta de não encontrar rapidamente o que procura e cabe-nos a nós dar-lhes o que desejam.</p>
<p><img class="aligncenter size-medium wp-image-802" title="Contactos" src="http://joaopedropereira.com/blog/wp-content/uploads/2010/06/ContactUs-300x200.jpg" alt="Contactos" width="300" height="200" /></p>
<p><strong>Informação de Contacto </strong>- É também muito importante ter informações de como pode ser feito o contacto com o dono do site ou então criar um formulário de contacto para facilitar o contacto.</p>
<p><span style="text-decoration: underline;">Ferramentas e Inspiração:</span><br />
<a title="15 Great Online Form Building Tools" href="http://www.tripwiremagazine.com/2010/05/15-great-online-form-building-tools.html" target="_blank">15 Great Online Form Building Tools</a><br />
<a title="Beautiful Contact Forms For Your Inspiration" href="http://www.webdesignerdepot.com/2010/05/beautiful-contact-forms-for-your-inspiration/" target="_blank">Beautiful Contact Forms For Your Inspiration</a></p>
<p><strong> Sobre</strong> &#8211; A par da informação de contacto, uma rápida descrição do que é aquela página, quem é a empresa, quem é a pessoa, etc. algo que faça os utilizadores conhecer melhor.</p>
<p><img class="aligncenter size-medium wp-image-809" title="Web2.0 Logos" src="http://joaopedropereira.com/blog/wp-content/uploads/2010/06/web2_logos1-300x251.jpg" alt="" width="300" height="251" /></p>
<p><strong> Social Media</strong> &#8211;  É sem dúvida uma excelente forma de ganhar mais tráfego e/ou de manter os utilizadores actualizados quanto a informações relativos ao produto/conteúdo que o site tem ou vende.</p>
<p>Esta é uma lista de sugestões do que pode ser colocado no footer dos seus sites e dos sites que desenvolve, contudo a lista não termina por aqui existem muito mais coisas que podem ser colocados no footer, feed do Flickr com imagens interessantes, publicidade, formulários para subscrever a newsletters, feeds do twitter e/ou facebook, etc. etc. etc. Apenas a imaginação e originalidade de cada um é o limite.</p>


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		<title>New Features WordPress 3 Review</title>
		<link>http://feedproxy.google.com/~r/joaopedropereira/~3/yf8fm2Lny_o/</link>
		<comments>http://joaopedropereira.com/blog/2010/04/21/wordpress-3-review/#comments</comments>
		<pubDate>Wed, 21 Apr 2010 20:23:10 +0000</pubDate>
		<dc:creator>João Pedro Pereira</dc:creator>
				<category><![CDATA[PHP]]></category>
		<category><![CDATA[Tecnologia]]></category>
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		<category><![CDATA[php]]></category>
		<category><![CDATA[review]]></category>
		<category><![CDATA[wordpress]]></category>

		<guid isPermaLink="false">http://joaopedropereira.com/blog/?p=752</guid>
		<description><![CDATA[É provavelmente ainda um bocado cedo para falar do WordPress 3.0 pois o lançamento desta só está previsto para finais de Maio, mas tenho vindo a brincar um pouco com ele  e com as suas novas funcionalidades. A versão 3.0 do WordPress promete um visual mais soft da página de administração, vai também introduzir uma [...]]]></description>
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<p>É provavelmente ainda um bocado cedo para falar do WordPress 3.0 pois o lançamento desta só está previsto para finais de Maio, mas tenho vindo a brincar um pouco com ele  e com as suas novas funcionalidades.</p>
<p>A versão 3.0 do WordPress promete um visual mais soft da página de administração, vai também introduzir uma nova default theme, a <em>&#8220;Twenty Ten&#8221;</em>, que permite personalizar o fundo e as opções do cabeçalho ( header ), possibilidade de criar os menus com categorias, tags, posts, links externos, etc., entre outras modificações que podem ver na <a title="Wordpress -- Version 3.0" href="http://codex.wordpress.org/Version_3.0" target="_blank">página oficial</a>.</p>
<p><a href="http://joaopedropereira.com/blog/wp-content/uploads/2010/04/Twenty-Ten.png"><img class="aligncenter size-medium wp-image-762" title="Twenty Ten" src="http://joaopedropereira.com/blog/wp-content/uploads/2010/04/Twenty-Ten-300x240.png" alt="" width="300" height="240" /></a></p>
<p>Neste post vou dar realce a apenas duas características que surgirão na versão 3.0 do WordPress, ou pelo menos que estão prevista e que estão em desenvolvimento.</p>
<h2>WordPress + WordPress MU == WordPress 3.0</h2>
<p>O WordPress MU ou WordPress Multi-User era uma versão modificada do sistema WordPress para permitir redes de blogs numa só instalação.</p>
<p><strong><span style="text-decoration: underline;">Site:</span></strong> <a title="Wordpress MU" href="http://mu.wordpress.org/" target="_blank">http://mu.wordpress.org</a></p>
<p>Create a Network of Multiple Sites on WordPress 3.0</p>
<p>É tão simples como adicionar no ficheiro wp-config.php a seguinte linha:</p>

<div class="wp_syntax"><div class="code"><pre class="php" style="font-family:monospace;"><span style="color: #990000;">define</span> <span style="color: #009900;">&#40;</span><span style="color: #0000ff;">'WP_ALLOW_MULTISITE'</span><span style="color: #339933;">,</span> <span style="color: #009900; font-weight: bold;">true</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span></pre></div></div>

<p>Seleccionar o menu<em> Tools -&gt; Network</em> e seguir as instruções.</p>
<p>Este é o menu que vos espera depois de tudo configurado.</p>
<p><img class="aligncenter size-full wp-image-757" title="Wordpress Network Menu" src="http://joaopedropereira.com/blog/wp-content/uploads/2010/04/menu.png" alt="" width="150" height="290" /></p>
<p><strong><span style="text-decoration: underline;">Ver artigo:</span></strong> <a title="Create a Network" href="http://codex.wordpress.org/User:Andrea/Create_A_Network" target="_blank">http://codex.wordpress.org/User:Andrea/Create_A_Network</a></p>
<h2>Custom Post Types on WordPress 3.0</h2>
<p>Quem já teve de desenvolver uma theme para WordPress um pouco mais complexo provavelmente já teve de fazer uns quantos hacks de forma a conseguir ter estilos diferentes para categorias diferentes&#8230; Os developers do WordPress pensaram em nós e decidiram tornar a possibilidade de ter vários estilos para diferentes tipos de posts de uma forma mais simples na versão 3.0 do WordPress.</p>
<p>Para tirar partido desta funcionalidade é necessário adicionar o seguinte código no ficheiro wp-content/themes/yourtheme/functions.php :</p>

<div class="wp_syntax"><div class="code"><pre class="php" style="font-family:monospace;">register_post_type<span style="color: #009900;">&#40;</span><span style="color: #0000ff;">'testemunials'</span><span style="color: #339933;">,</span> <span style="color: #990000;">array</span><span style="color: #009900;">&#40;</span>
    <span style="color: #0000ff;">'label'</span> <span style="color: #339933;">=&gt;</span> __<span style="color: #009900;">&#40;</span><span style="color: #0000ff;">'Testemunials'</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">,</span>
    <span style="color: #0000ff;">'singular_label'</span> <span style="color: #339933;">=&gt;</span> __<span style="color: #009900;">&#40;</span><span style="color: #0000ff;">'Testemunial'</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">,</span>
    <span style="color: #0000ff;">'description'</span> <span style="color: #339933;">=&gt;</span> <span style="color: #0000ff;">'Here goes my testemunials'</span><span style="color: #339933;">,</span>
    <span style="color: #0000ff;">'public'</span> <span style="color: #339933;">=&gt;</span> <span style="color: #009900; font-weight: bold;">true</span><span style="color: #339933;">,</span>
    <span style="color: #0000ff;">'show_ui'</span> <span style="color: #339933;">=&gt;</span> <span style="color: #009900; font-weight: bold;">true</span><span style="color: #339933;">,</span>
    <span style="color: #0000ff;">'capability_type'</span> <span style="color: #339933;">=&gt;</span> <span style="color: #0000ff;">'post'</span><span style="color: #339933;">,</span>
    <span style="color: #0000ff;">'hierarchical'</span> <span style="color: #339933;">=&gt;</span> <span style="color: #009900; font-weight: bold;">false</span><span style="color: #339933;">,</span>
    <span style="color: #0000ff;">'rewrite'</span> <span style="color: #339933;">=&gt;</span> <span style="color: #009900; font-weight: bold;">false</span><span style="color: #339933;">,</span>
    <span style="color: #0000ff;">'query_var'</span> <span style="color: #339933;">=&gt;</span> <span style="color: #009900; font-weight: bold;">false</span><span style="color: #339933;">,</span>
    <span style="color: #0000ff;">'supports'</span> <span style="color: #339933;">=&gt;</span> <span style="color: #990000;">array</span><span style="color: #009900;">&#40;</span>
        <span style="color: #0000ff;">'title'</span><span style="color: #339933;">,</span>
        <span style="color: #0000ff;">'editor'</span><span style="color: #339933;">,</span>
        <span style="color: #0000ff;">'author'</span><span style="color: #339933;">,</span>
        <span style="color: #0000ff;">'excerpts'</span><span style="color: #339933;">,</span>
        <span style="color: #0000ff;">'comments'</span>
    <span style="color: #009900;">&#41;</span>
<span style="color: #009900;">&#41;</span><span style="color: #009900;">&#41;</span><span style="color: #339933;">;</span></pre></div></div>

<p><img class="aligncenter size-medium wp-image-773" title="Menu Custom Post-Type" src="http://joaopedropereira.com/blog/wp-content/uploads/2010/04/menu2-143x300.png" alt="" width="143" height="300" /></p>
<p>Tal como é possível definir vários tipos de posts também é possível utilizar esta funcionalidade para páginas diferentes alterando o parâmetro &#8216;capability_type&#8217; para &#8216;capability_type&#8217;=&gt;&#8217;page&#8217;.</p>
<p><strong><span style="text-decoration: underline;">Function Reference/register post type:</span></strong> <a title="Function Reference/register post type" href="http://codex.wordpress.org/Function_Reference/register_post_type" target="_blank">http://codex.wordpress.org/Function_Reference/register_post_type</a></p>


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		<item>
		<title>Patrocinio – CD Submundos</title>
		<link>http://feedproxy.google.com/~r/joaopedropereira/~3/-ZVm9VBHx-M/</link>
		<comments>http://joaopedropereira.com/blog/2010/04/20/patrocinio-submundos/#comments</comments>
		<pubDate>Tue, 20 Apr 2010 22:36:07 +0000</pubDate>
		<dc:creator>João Pedro Pereira</dc:creator>
				<category><![CDATA[Infos]]></category>
		<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[patrocinio]]></category>

		<guid isPermaLink="false">http://joaopedropereira.com/blog/?p=779</guid>
		<description><![CDATA[É com orgulho que vos apresento o mais recente projecto patrocinado pelo The Blog of a WebDeveloper. O CD Submundos um Projecto Nacional do Mundo da Música. O CD Submundos é um CD criado com músicas dos membros do fórum submundos, e partilhado pela Internet, com a finalidade de divulgar os seus talentos. O CD [...]]]></description>
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<p>É com orgulho que vos apresento o mais recente projecto patrocinado pelo <em>The Blog of a WebDeveloper. </em>O CD Submundos um Projecto Nacional do Mundo da Música.</p>
<p><img class="aligncenter size-medium wp-image-780" title="Submundos" src="http://joaopedropereira.com/blog/wp-content/uploads/2010/04/submundos-300x77.gif" alt="" width="300" height="77" /></p>
<p>O CD Submundos é um CD criado com músicas dos membros do fórum submundos, e partilhado pela Internet, com a finalidade de divulgar os seus talentos. O CD Submundos é partilhado na Internet através de vários sites, com as melhores músicas escolhidas através de votação pelos membros.<br />
Esta versão contou com 7 músicas, organizadas de acordo com a maior percentagem de votos.</p>
<p>CD Submundos:</p>
<p>1 &#8211; Insubmysso &#8211; 69<br />
2 &#8211; Dj Bu5a &#8211; My Soul (DJ DeepBlue &amp; Maurillo Remix)<br />
3 &#8211; Isolaz &#8211; Mudam os Tempos<br />
4 &#8211; Mister Music &#8211; How I feel<br />
5 &#8211; Vedeta &#8211; Honey i got money<br />
6 &#8211; dmL &#8211; Sem Ar<br />
7 &#8211; MRK &#8211; Se Soubesses (O Quanto)</p>
<p><span style="text-decoration: underline;"><strong>Download:</strong></span><strong> </strong><span style="text-decoration: underline;">[35mb]</span></p>
<p><a title="CD Submundos - HotFile" href="http://hotfile.com/dl/38540864/aaae995/CD_Submundos.zip.html" target="_blank">hotfile</a> | <a title="CD Submundos - MegaUpload" href="http://www.megaupload.com/?d=SYM5C44S" target="_blank">megaupload</a></p>


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		<item>
		<title>PHP Security Check-List CheatSheet</title>
		<link>http://feedproxy.google.com/~r/joaopedropereira/~3/iGXskrNv2i8/</link>
		<comments>http://joaopedropereira.com/blog/2010/04/18/php-security-check-list-cheatsheet/#comments</comments>
		<pubDate>Sun, 18 Apr 2010 13:41:56 +0000</pubDate>
		<dc:creator>João Pedro Pereira</dc:creator>
				<category><![CDATA[PHP]]></category>
		<category><![CDATA[Segurança]]></category>
		<category><![CDATA[Webdevelopment]]></category>
		<category><![CDATA[cheatsheet]]></category>
		<category><![CDATA[php]]></category>

		<guid isPermaLink="false">http://joaopedropereira.com/blog/?p=743</guid>
		<description><![CDATA[Para cada projecto que tenho desenvolvido ultimamente utilizando a linguagem de programação server-side PHP, tenho-me guiado por uma checklist de forma a não me esquecer  de nada evitando assim falhas graves nas aplicações que desenvolvo. Pois a segurança é uma das preocupações que tenho. Esta checklist aborda diversas situações como, casos gerais, casos de input, [...]]]></description>
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<p>Para cada projecto que tenho desenvolvido ultimamente utilizando a linguagem de programação server-side PHP, tenho-me guiado por uma checklist de forma a não me esquecer  de nada evitando assim falhas graves nas aplicações que desenvolvo. Pois a segurança é uma das preocupações que tenho.</p>
<p>Esta checklist aborda diversas situações como, casos gerais, casos de input, file uploads, autenticação, entre outros.</p>
<div id="attachment_744" class="wp-caption aligncenter" style="width: 234px"><a href="http://joaopedropereira.com/files/phpsec_cheatsheet.pdf"><img class="size-medium wp-image-744" title="PHP Security CheckList" src="http://joaopedropereira.com/blog/wp-content/uploads/2010/04/phpsec_cheatsheet-224x300.png" alt="" width="224" height="300" /></a><p class="wp-caption-text">Click on image to download</p></div>
<p>Recomendo vivamente a sua utilização e até sugestões de melhorias, apesar de ela não ser da minha autoria.</p>
<p>O que acham desta checklist? Conhecem alguma melhor? Como se guiam no desenvolvimento de aplicações web de forma  a manter a segurança da mesma?</p>


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		<item>
		<title>ConnectionDetails.info :: Information About Your Connection</title>
		<link>http://feedproxy.google.com/~r/joaopedropereira/~3/eoCrkML5JtI/</link>
		<comments>http://joaopedropereira.com/blog/2010/03/17/connectiondetails-info-information-about-your-connection/#comments</comments>
		<pubDate>Wed, 17 Mar 2010 23:33:30 +0000</pubDate>
		<dc:creator>João Pedro Pereira</dc:creator>
				<category><![CDATA[Projectos]]></category>
		<category><![CDATA[Tecnologia]]></category>
		<category><![CDATA[ConnectionDetails.info]]></category>

		<guid isPermaLink="false">http://joaopedropereira.com/blog/?p=739</guid>
		<description><![CDATA[Hoje, dia 17 de Março de 2010, lanço uma primeira versão &#8220;estável&#8221; de um serviço que já corre à algum tempo no dominio ConnectionDetails.info. Este serviço pretende dar informações precisas relativas ao browser bem como algumas características da ligação do utilizador. Numa primeira fase as informações disponíveis são: IP Browser Sistema Operativo De onde veio [...]]]></description>
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<p>Hoje, dia 17 de Março de 2010, lanço uma primeira versão &#8220;estável&#8221; de um serviço que já corre à algum tempo no dominio <a title="ConnectionDetails.info :: Information About Your Connection" href="http://connectiondetails.info">ConnectionDetails.info</a>.</p>
<p>Este serviço pretende dar informações precisas relativas ao browser bem como algumas características da ligação do utilizador. Numa primeira fase as informações disponíveis são:</p>
<ul>
<li>IP</li>
<li>Browser</li>
<li>Sistema Operativo</li>
<li>De onde veio o utilizador (Referrer)</li>
<li>Porta que está a ser usada para efectuar a ligação</li>
<li>Velocidade da ligação</li>
</ul>
<p>Ainda existem alguns bugs quer na aquisição de informações quer no design. Agradecia que fosse feito o report das falhas encontradas e imprecisões.</p>
<p>No futuro pretendo lançar uma versão mais precisa a identificar as informações, bem como adicionar funcionalidades como tentar descobrir qual os routers por trás da ligação, identificar características especificas do browser como as versões de JavaScript suportadas, CSS, versão do Java e do Flash em utilização, etc. Uma outra funcionalidade é o fetching das bases de dados de vulnerabilidades existentes online de forma a encontrar falhas de segurança para a versão dos software instalados.</p>
<p>Agradeço desde todo o suporte que possam dar em especial ao nível de sugestões de funcionalidades, bug catching, criticas/comentários e divulgação.</p>


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		<title>Vulnerabilidades Site Novas Oportunidades</title>
		<link>http://feedproxy.google.com/~r/joaopedropereira/~3/__80ooUUdEA/</link>
		<comments>http://joaopedropereira.com/blog/2010/03/08/vulnerabilidades-site-novas-oportunidades/#comments</comments>
		<pubDate>Mon, 08 Mar 2010 14:43:23 +0000</pubDate>
		<dc:creator>João Pedro Pereira</dc:creator>
				<category><![CDATA[Segurança]]></category>
		<category><![CDATA[Webdevelopment]]></category>
		<category><![CDATA[SQL Injection]]></category>
		<category><![CDATA[vulnerabilidade]]></category>
		<category><![CDATA[xss]]></category>

		<guid isPermaLink="false">http://joaopedropereira.com/blog/?p=722</guid>
		<description><![CDATA[Já há algum tempo que tenho andado a investigar sites nacionais em busca de falhas de segurança e quase todos as têm, as mais frequentes são as falhas XSS mas também é muito comum encontrar falhas de SQL Injection. Hoje tive acesso através de um tweet do Público (http://bit.ly/aU0kuy) à informação de que o site [...]]]></description>
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<p>Já há algum tempo que tenho andado a investigar sites nacionais em busca de falhas de segurança e quase todos as têm, as mais frequentes são as falhas XSS mas também é muito comum encontrar falhas de SQL Injection.</p>
<p style="text-align: center;"><a href="http://joaopedropereira.com/blog/wp-content/uploads/2010/03/logo.png"><img class="size-full wp-image-728 aligncenter" title="Novas Oportunidades" src="http://joaopedropereira.com/blog/wp-content/uploads/2010/03/logo.png" alt="" width="301" height="157" /></a></p>
<p>Hoje tive acesso através de um tweet do Público (<a title="Site das Novas Oportunidades atacado por hacker" href="http://bit.ly/aU0kuy" target="_blank">http://bit.ly/aU0kuy</a>) à informação de que o site das <a title="Novas Oportunidades" href="http://www.novasoportunidades.gov.pt/" target="_blank">Novas Oportunidades</a> tinha sido explorado e alterado por  alguém&#8230; Decidi então enquanto era tempo verificar as falhas que existiam no site e qual o meu espanto (not) quando vejo presentes falhas de XSS, falhas de SQL Injection e falhas de validação de parâmetros que permitem Impersonation Attack através de injecção de URL.</p>
<p>O ataque relatado pelo público foi feito através de SQL Injection possivelmente na página seguinte pois esta está totalmente aberta a ataques deste género: <a href="http://testemunhos.novasoportunidades.gov.pt/detalhe_video.aspx?id=9&amp;tipo=1" target="_blank" class="broken_link">http://testemunhos.novasoportunidades.gov.pt/detalhe_video.aspx</a></p>
<p><a href="http://joaopedropereira.com/blog/wp-content/uploads/2010/03/Screenshot-3.png"><img class="aligncenter size-thumbnail wp-image-736" title="Novas Oportunidades SQL Injection" src="http://joaopedropereira.com/blog/wp-content/uploads/2010/03/Screenshot-3-150x150.png" alt="" width="150" height="150" /></a></p>
<p>O ataque que referi relativo a problemas de validação de parâmetros que permitem injecção de URL: <a href="http://www.novasoportunidades.gov.pt/outerFrame.jsp?link=http://joaopedropereira.com/blog/ " target="_blank">http://www.novasoportunidades.gov.pt/outerFrame.jsp?link=http://joaopedropereira.com/blog/</a></p>
<p><a href="http://joaopedropereira.com/blog/wp-content/uploads/2010/03/Screenshot-2.png"><img class="aligncenter size-thumbnail wp-image-735" title="Novas Oportunidades Impersonation Attack" src="http://joaopedropereira.com/blog/wp-content/uploads/2010/03/Screenshot-2-150x150.png" alt="" width="150" height="150" /></a></p>
<p>Com alguma imaginação pode-se fazer alguns ataques interessantes a partir daqui&#8230;</p>
<p>Na pesquisa também podemos facilmente fazer ataques de XSS (Cross Site Scripting) como referi anteriormente: <a href="http://www.novasoportunidades.gov.pt/np4/q?q=%3Cscript%3Ealert%28%22The+Blog+of+a+WebDeveloper%22%29%3C%2Fscript%3E" target="_blank">http://www.novasoportunidades.gov.pt/np4/q?q=%3Cscript%3Ealert%28%22The+Blog+of+a+WebDeveloper%22%29%3C%2Fscript%3E</a></p>
<p><a href="http://joaopedropereira.com/blog/wp-content/uploads/2010/03/Screenshot-1.png"><img class="aligncenter size-thumbnail wp-image-734" title="Novas Oportunidades XSS Attack" src="http://joaopedropereira.com/blog/wp-content/uploads/2010/03/Screenshot-1-150x150.png" alt="" width="150" height="150" /></a></p>
<p>Isto mostra a preparação e conhecimentos ao nível de segurança informática que os WebDevelopers que o estado contrata têm&#8230; Atenção este não é o único site governamental com problemas graves de segurança, existem mais e talvez que transaccionem dados mais importantes&#8230;</p>
<p><strong><span style="text-decoration: underline;">Nota</span></strong>: Este post não tem como intuito incentivar qualquer tipo de ataque informático, pretende apenas informar e alertar para os problemas informáticos que podem surgir num futuro nas infraestruturas governamentais (e não só). É importante ter as nossas plataformas o mais seguras possíveis, para não sermos surpreendidos um dia.</p>
<p><strong><span style="text-decoration: underline;">EDIT</span></strong></p>
<p>As falhas estão a ser corrigidas, quase completas por isso para registo futuro adicionei screenshots das falhas. É também de valor ler e participar nos comentários a este post que estão a dar uma boa análise do Web Development nacional.</p>
<p><strong>EDIT 2</strong></p>
<p>Governo desmente ataque informático: <a title="Portal Novas Oportunidades não foi alvo de ataque informático" href="http://www.governo.gov.pt/pt/GC18/Governo/Ministerios/MTSS/Notas/Pages/20100308_MTSS_Com_Novas_Oportunidades.aspx" target="_blank">Portal Novas Oportunidades não foi alvo de ataque informático </a>. Provavelmente precisam que venha algo abaixo e que cause danos a muitas pessoas para admitirem os erros&#8230;</p>


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