mirror of
https://github.com/php/doc-es.git
synced 2026-03-23 23:12:09 +01:00
1318 lines
35 KiB
XML
1318 lines
35 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<!-- EN-Revision: ac397fd0da4d814b5a2f4ba49254f9b6093315e1 Maintainer: PhilDaiguille Status: ready -->
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<!-- Reviewed: no -->
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<chapter xml:id="event.examples" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
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&reftitle.examples;
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<example>
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<title>Cliente HTTP simple</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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// Lectura de la función de retrollamada
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function readcb($bev, $base) {
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//$input = $bev->input; //$bev->getInput();
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//$pos = $input->search("TTP");
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$pos = $bev->input->search("TTP");
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while (($n = $bev->input->remove($buf, 1024)) > 0) {
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echo $buf;
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}
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}
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// Función de retrollamada del evento
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function eventcb($bev, $events, $base) {
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if ($events & EventBufferEvent::CONNECTED) {
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echo "Conectado.\n";
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} elseif ($events & (EventBufferEvent::ERROR | EventBufferEvent::EOF)) {
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if ($events & EventBufferEvent::ERROR) {
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echo "error DNS : ", $bev->getDnsErrorString(), PHP_EOL;
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}
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echo "Cierre\n";
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$base->exit();
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exit("¡Hecho!\n");
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}
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}
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if ($argc != 3) {
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echo <<<EOS
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Trivial HTTP 0.x client
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Syntax: php {$argv[0]} [hostname] [resource]
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Example: php {$argv[0]} www.google.com /
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EOS;
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exit();
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}
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$base = new EventBase();
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$dns_base = new EventDnsBase($base, TRUE); // Se utiliza una resolución DNS asíncrona
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if (!$dns_base) {
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exit("Fallo en la inicialización de la base DNS\n");
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}
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$bev = new EventBufferEvent($base, /* use internal socket */ NULL,
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EventBufferEvent::OPT_CLOSE_ON_FREE | EventBufferEvent::OPT_DEFER_CALLBACKS,
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"readcb", /* writecb */ NULL, "eventcb"
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);
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if (!$bev) {
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exit("Fallo en la creación del socket bufferevent\n");
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}
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//$bev->setCallbacks("readcb", /* writecb */ NULL, "eventcb", $base);
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$bev->enable(Event::READ | Event::WRITE);
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$output = $bev->output; //$bev->getOutput();
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if (!$output->add(
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"GET {$argv[2]} HTTP/1.0\r\n".
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"Host: {$argv[1]}\r\n".
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"Connection: Close\r\n\r\n"
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)) {
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exit("Fallo en la adición de la petición en el buffer de salida\n");
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}
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if (!$bev->connectHost($dns_base, $argv[1], 80, EventUtil::AF_UNSPEC)) {
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exit("Conexión imposible al host {$argv[1]}\n");
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}
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$base->dispatch();
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?>
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]]>
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</programlisting>
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&example.outputs.similar;
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<screen>
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<![CDATA[
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Connected.
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HTTP/1.1 301 Moved Permanently
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Date: Fri, 01 Mar 2013 18:47:48 GMT
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Location: http://www.google.co.uk/
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Content-Type: text/html; charset=UTF-8
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Cache-Control: public, max-age=2592000
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Server: gws
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Content-Length: 221
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X-XSS-Protection: 1; mode=block
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X-Frame-Options: SAMEORIGIN
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Age: 133438
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Expires: Sat, 30 Mar 2013 05:39:28 GMT
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Connection: close
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<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">
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<TITLE>301 Moved</TITLE></HEAD><BODY>
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<H1>301 Moved</H1>
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The document has moved
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<A HREF="http://www.google.co.uk/">here</A>.
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</BODY></HTML>
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Closing
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Done
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]]>
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</screen>
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</example>
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<example>
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<title>Cliente HTTP utilizando una resolución DNS asíncrona</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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/*
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* 1. Conexión a 127.0.0.1 en el puerto 80
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* utilizando EventBufferEvent::connect().
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*
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* 2. Petición /index.cphp vía HTTP/1.0
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* utilizando el buffer de salida.
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*
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* 3. Lectura asíncrona de la respuesta y la muestra en stdout.
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*/
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// Lectura de la función de retrollamada
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function readcb($bev, $base) {
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$input = $bev->getInput();
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while (($n = $input->remove($buf, 1024)) > 0) {
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echo $buf;
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}
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}
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// Función de retrollamada del evento
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function eventcb($bev, $events, $base) {
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if ($events & EventBufferEvent::CONNECTED) {
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echo "Conectado.\n";
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} elseif ($events & (EventBufferEvent::ERROR | EventBufferEvent::EOF)) {
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if ($events & EventBufferEvent::ERROR) {
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echo "Error DNS : ", $bev->getDnsErrorString(), PHP_EOL;
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}
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echo "Cierre\n";
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$base->exit();
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exit("¡Hecho!\n");
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}
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}
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$base = new EventBase();
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echo "paso n°1\n";
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$bev = new EventBufferEvent($base, /* use internal socket */ NULL,
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EventBufferEvent::OPT_CLOSE_ON_FREE | EventBufferEvent::OPT_DEFER_CALLBACKS);
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if (!$bev) {
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exit("Fallo en la creación del socket bufferevent\n");
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}
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echo "paso n°2\n";
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$bev->setCallbacks("readcb", /* writecb */ NULL, "eventcb", $base);
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$bev->enable(Event::READ | Event::WRITE);
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echo "paso n°3\n";
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// Envío de la petición
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$output = $bev->getOutput();
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if (!$output->add(
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"GET /index.cphp HTTP/1.0\r\n".
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"Connection: Close\r\n\r\n"
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)) {
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exit("Fallo en la adición de la petición en el buffer de salida\n");
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}
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/* Conexión al host de forma síncrona.
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Conocemos la IP, por lo que no se necesita resolución DNS. */
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if (!$bev->connect("127.0.0.1:80")) {
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exit("Imposible conectar al host\n");
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}
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// Difunde los eventos pendientes
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$base->dispatch();
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?>
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]]>
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</programlisting>
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</example>
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<example>
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<title>Servidor de visualización</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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/*
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* Servidor de visualización simple basado en las escuchas de conexión libevent.
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*
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* Uso:
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* 1) En un terminal, ejecute:
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*
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* $ php listener.php 9881
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*
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* 2) En otro terminal, abra una conexión, i.e. :
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*
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* $ nc 127.0.0.1 9881
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*
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* 3) Comience a escribir. El servidor debería repetir las entradas.
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*/
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class MyListenerConnection {
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private $bev, $base;
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public function __destruct() {
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$this->bev->free();
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}
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public function __construct($base, $fd) {
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$this->base = $base;
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$this->bev = new EventBufferEvent($base, $fd, EventBufferEvent::OPT_CLOSE_ON_FREE);
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$this->bev->setCallbacks(array($this, "echoReadCallback"), NULL,
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array($this, "echoEventCallback"), NULL);
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if (!$this->bev->enable(Event::READ)) {
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echo "Fallo en la activación de READ\n";
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return;
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}
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}
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public function echoReadCallback($bev, $ctx) {
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// Copia todos los datos desde el buffer de entrada hacia el buffer de salida
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// Variante #1
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$bev->output->addBuffer($bev->input);
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/* Variante #2 */
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/*
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$input = $bev->getInput();
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$output = $bev->getOutput();
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$output->addBuffer($input);
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*/
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}
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public function echoEventCallback($bev, $events, $ctx) {
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if ($events & EventBufferEvent::ERROR) {
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echo "Error desde bufferevent\n";
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}
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if ($events & (EventBufferEvent::EOF | EventBufferEvent::ERROR)) {
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//$bev->free();
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$this->__destruct();
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}
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}
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}
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class MyListener {
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public $base,
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$listener,
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$socket;
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private $conn = array();
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public function __destruct() {
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foreach ($this->conn as &$c) $c = NULL;
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}
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public function __construct($port) {
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$this->base = new EventBase();
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if (!$this->base) {
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echo "Imposible abrir la base del evento";
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exit(1);
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}
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// Variante #1
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/*
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$this->socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
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if (!socket_bind($this->socket, '0.0.0.0', $port)) {
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echo "Imposible enlazar el socket\n";
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exit(1);
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}
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$this->listener = new EventListener($this->base,
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array($this, "acceptConnCallback"), $this->base,
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EventListener::OPT_CLOSE_ON_FREE | EventListener::OPT_REUSEABLE,
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-1, $this->socket);
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*/
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// Variante #2
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$this->listener = new EventListener($this->base,
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array($this, "acceptConnCallback"), $this->base,
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EventListener::OPT_CLOSE_ON_FREE | EventListener::OPT_REUSEABLE, -1,
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"0.0.0.0:$port");
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if (!$this->listener) {
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echo "Imposible crear el oyente";
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exit(1);
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}
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$this->listener->setErrorCallback(array($this, "accept_error_cb"));
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}
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public function dispatch() {
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$this->base->dispatch();
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}
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// Esta función de retrollamada es llamada cuando hay datos para leer en $bev
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public function acceptConnCallback($listener, $fd, $address, $ctx) {
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// ¡Tenemos una nueva conexión! Se define un bufferevent para ella. */
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$base = $this->base;
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$this->conn[] = new MyListenerConnection($base, $fd);
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}
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public function accept_error_cb($listener, $ctx) {
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$base = $this->base;
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fprintf(STDERR, "Se recibe un error %d (%s) en el oyente. "
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."Cerrando.\n",
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EventUtil::getLastSocketErrno(),
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EventUtil::getLastSocketError());
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$base->exit(NULL);
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}
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}
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$port = 9808;
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if ($argc > 1) {
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$port = (int) $argv[1];
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}
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if ($port <= 0 || $port > 65535) {
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exit("Puerto inválido");
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}
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$l = new MyListener($port);
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$l->dispatch();
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?>
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]]>
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</programlisting>
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</example>
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<example>
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<title>Servidor de visualización SSL</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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/*
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* Servidor de visualización SSL
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*
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* Para probar:
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* 1) Ejecute:
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* $ php examples/ssl-echo-server/server.php 9998
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*
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* 2) en otro terminal, ejecute:
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* $ socat - SSL:127.0.0.1:9998,verify=1,cafile=examples/ssl-echo-server/cert.pem
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*/
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class MySslEchoServer {
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public $port,
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$base,
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$bev,
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$listener,
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$ctx;
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function __construct ($port, $host = "127.0.0.1") {
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$this->port = $port;
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$this->ctx = $this->init_ssl();
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if (!$this->ctx) {
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exit("Fallo en la creación del contexto SSL\n");
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}
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$this->base = new EventBase();
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if (!$this->base) {
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exit("Imposible abrir la base del evento\n");
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}
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$this->listener = new EventListener($this->base,
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array($this, "ssl_accept_cb"), $this->ctx,
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EventListener::OPT_CLOSE_ON_FREE | EventListener::OPT_REUSEABLE,
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-1, "$host:$port");
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if (!$this->listener) {
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exit("Imposible crear el oyente\n");
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}
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$this->listener->setErrorCallback(array($this, "accept_error_cb"));
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}
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function dispatch() {
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$this->base->dispatch();
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}
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// Esta función de retrollamada es llamada cuando hay datos para leer en $bev.
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function ssl_read_cb($bev, $ctx) {
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$in = $bev->input; //$bev->getInput();
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printf("Recepción de %zu bytes\n", $in->length);
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printf("----- datos ----\n");
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printf("%ld:\t%s\n", (int) $in->length, $in->pullup(-1));
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$bev->writeBuffer($in);
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}
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// Esta función de retrollamada es llamada cuando ocurren errores en el oyente de eventos,
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// i.e. la conexión se cierra, o ocurre un error
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function ssl_event_cb($bev, $events, $ctx) {
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if ($events & EventBufferEvent::ERROR) {
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// Recupera los errores desde la pila de errores SSL
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while ($err = $bev->sslError()) {
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fprintf(STDERR, "Error Bufferevent %s.\n", $err);
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}
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}
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if ($events & (EventBufferEvent::EOF | EventBufferEvent::ERROR)) {
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$bev->free();
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}
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}
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// Esta función de retrollamada es llamada cuando un cliente acepta una nueva conexión
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function ssl_accept_cb($listener, $fd, $address, $ctx) {
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// ¡Tenemos una nueva conexión! Se define un bufferevent para ella.
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$this->bev = EventBufferEvent::sslSocket($this->base, $fd, $this->ctx,
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EventBufferEvent::SSL_ACCEPTING, EventBufferEvent::OPT_CLOSE_ON_FREE);
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if (!$this->bev) {
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echo "Fallo en la creación del buffer SSL\n";
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$this->base->exit(NULL);
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exit(1);
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}
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$this->bev->enable(Event::READ);
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$this->bev->setCallbacks(array($this, "ssl_read_cb"), NULL,
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array($this, "ssl_event_cb"), NULL);
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}
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// Esta función de retrollamada es llamada cuando se falla en definir una nueva conexión para un cliente
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function accept_error_cb($listener, $ctx) {
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fprintf(STDERR, "Se recibe un error %d (%s) en el oyente. "
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."Cerrando.\n",
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EventUtil::getLastSocketErrno(),
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EventUtil::getLastSocketError());
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$this->base->exit(NULL);
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}
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|
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// Inicializa las estructuras SSL; crea un EventSslContext
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// Opcionalmente, crea certificados autofirmados
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function init_ssl() {
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// Necesitamos la entropía. De lo contrario, no tiene sentido cifrar.
|
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if (!EventUtil::sslRandPoll()) {
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exit("Fallo de EventUtil::sslRandPoll\n");
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}
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$local_cert = __DIR__."/cert.pem";
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$local_pk = __DIR__."/privkey.pem";
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|
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if (!file_exists($local_cert) || !file_exists($local_pk)) {
|
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echo "Imposible leer $local_cert ni $local_pk archivo. Para generar una clave\n",
|
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"y un certificado autofirmado, ejecute :\n",
|
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" openssl genrsa -out $local_pk 2048\n",
|
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" openssl req -new -key $local_pk -out cert.req\n",
|
|
" openssl x509 -req -days 365 -in cert.req -signkey $local_pk -out $local_cert\n";
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return FALSE;
|
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}
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|
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$ctx = new EventSslContext(EventSslContext::SSLv3_SERVER_METHOD, array (
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EventSslContext::OPT_LOCAL_CERT => $local_cert,
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EventSslContext::OPT_LOCAL_PK => $local_pk,
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//EventSslContext::OPT_PASSPHRASE => "echo server",
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EventSslContext::OPT_VERIFY_PEER => true,
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EventSslContext::OPT_ALLOW_SELF_SIGNED => false,
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));
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|
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return $ctx;
|
|
}
|
|
}
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|
|
|
// Permite el sobrescrito del puerto
|
|
$port = 9999;
|
|
if ($argc > 1) {
|
|
$port = (int) $argv[1];
|
|
}
|
|
if ($port <= 0 || $port > 65535) {
|
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exit("Puerto inválido\n");
|
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}
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$l = new MySslEchoServer($port);
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$l->dispatch();
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?>
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]]>
|
|
</programlisting>
|
|
</example>
|
|
<example>
|
|
<title>Manejador de señal</title>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
/*
|
|
En un terminal, ejecute:
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|
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$ php examples/signal.php
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|
|
En otro terminal, encuentre el pid y envíe la señal SIGTERM, i.e. :
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|
|
|
$ ps aux | grep examp
|
|
ruslan 3976 0.2 0.0 139896 11256 pts/1 S+ 10:25 0:00 php examples/signal.php
|
|
ruslan 3978 0.0 0.0 9572 864 pts/2 S+ 10:26 0:00 grep --color=auto examp
|
|
$ kill -TERM 3976
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|
|
|
En el primer terminal, debería capturar lo siguiente:
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|
|
|
Se captura la señal 15
|
|
*/
|
|
class MyEventSignal {
|
|
private $base;
|
|
|
|
function __construct($base) {
|
|
$this->base = $base;
|
|
}
|
|
|
|
function eventSighandler($no, $c) {
|
|
echo "Se captura la señal $no\n";
|
|
event_base_loopexit($c->base);
|
|
}
|
|
}
|
|
|
|
$base = event_base_new();
|
|
$c = new MyEventSignal($base);
|
|
$no = SIGTERM;
|
|
$ev = evsignal_new($base, $no, array($c,'eventSighandler'), $c);
|
|
|
|
evsignal_add($ev);
|
|
|
|
event_base_loop($base);
|
|
?>
|
|
]]>
|
|
</programlisting>
|
|
</example>
|
|
<example>
|
|
<title>Uso de un bucle libevent para realizar las peticiones de la extensión `eio'</title>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
// Función de retrollamada para eio_nop()
|
|
function my_nop_cb($d, $r) {
|
|
echo "paso 6\n";
|
|
}
|
|
|
|
$dir = "/tmp/abc-eio-temp";
|
|
if (file_exists($dir)) {
|
|
rmdir($dir);
|
|
}
|
|
|
|
echo "paso 1\n";
|
|
|
|
$base = new EventBase();
|
|
|
|
echo "paso 2\n";
|
|
|
|
eio_init();
|
|
|
|
eio_mkdir($dir, 0750, EIO_PRI_DEFAULT, "my_nop_cb");
|
|
|
|
$event = new Event($base, eio_get_event_stream(),
|
|
Event::READ | Event::PERSIST, function ($fd, $events, $base) {
|
|
echo "paso 5\n";
|
|
|
|
while (eio_nreqs()) {
|
|
eio_poll();
|
|
}
|
|
|
|
$base->stop();
|
|
}, $base);
|
|
|
|
echo "paso 3\n";
|
|
|
|
$event->add();
|
|
|
|
echo "paso 4\n";
|
|
|
|
$base->dispatch();
|
|
|
|
echo "¡Hecho!\n";
|
|
?>
|
|
]]>
|
|
</programlisting>
|
|
</example>
|
|
<example>
|
|
<title>Diversos</title>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
/* {{{ Configuración y métodos soportados */
|
|
echo "Métodos soportados :\n";
|
|
foreach (Event::getSupportedMethods() as $m) {
|
|
echo $m, PHP_EOL;
|
|
}
|
|
|
|
// Se desactiva el método "select"
|
|
$cfg = new EventConfig();
|
|
if ($cfg->avoidMethod("select")) {
|
|
echo "El método 'select' ha sido desactivado\n";
|
|
}
|
|
|
|
// Crea un event_base asociado a la configuración
|
|
$base = new EventBase($cfg);
|
|
echo "Método de evento utilizado : ", $base->getMethod(), PHP_EOL;
|
|
|
|
echo "Características :\n";
|
|
$features = $base->getFeatures();
|
|
($features & EventConfig::FEATURE_ET) and print "ET - edge-triggered IO\n";
|
|
($features & EventConfig::FEATURE_O1) and print "O1 - O(1) operation for adding/deleting events\n";
|
|
($features & EventConfig::FEATURE_FDS) and print "FDS - arbitrary file descriptor types, and not just sockets\n";
|
|
|
|
// Requiere la característica FDS
|
|
if ($cfg->requireFeatures(EventConfig::FEATURE_FDS)) {
|
|
echo "La característica FDS es ahora requerida\n";
|
|
|
|
$base = new EventBase($cfg);
|
|
($base->getFeatures() & EventConfig::FEATURE_FDS)
|
|
and print "FDS - tipo de descriptor de archivo arbitrario, y no solo los sockets\n";
|
|
}
|
|
/* }}} */
|
|
|
|
/* {{{ Base */
|
|
$base = new EventBase();
|
|
$event = new Event($base, STDIN, Event::READ | Event::PERSIST, function ($fd, $events, $arg) {
|
|
static $max_iterations = 0;
|
|
|
|
if (++$max_iterations >= 5) {
|
|
/* se sale después de 5 iteraciones con un tiempo máximo de espera de 2.33 segundos */
|
|
echo "Detención...\n";
|
|
$arg[0]->exit(2.33);
|
|
}
|
|
|
|
echo fgets($fd);
|
|
}, array (&$base));
|
|
|
|
$event->add();
|
|
$base->loop();
|
|
/* Base }}} */
|
|
?>
|
|
]]>
|
|
</programlisting>
|
|
</example>
|
|
<example>
|
|
<title>Servidor HTTP simple</title>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
/*
|
|
* Servidor HTTP simple.
|
|
*
|
|
* Para probarlo:
|
|
* 1) Ejecútelo en el puerto de su elección, i.e. :
|
|
* $ php examples/http.php 8010
|
|
* 2) En otro terminal, conéctese a una dirección de este puerto
|
|
* y realice peticiones GET o POST (los otros tipos están desactivados en este ejemplo), i.e. :
|
|
* $ nc -t 127.0.0.1 8010
|
|
* POST /about HTTP/1.0
|
|
* Content-Type: text/plain
|
|
* Content-Length: 4
|
|
* Connection: close
|
|
* (presione Enter)
|
|
*
|
|
* Debería mostrar:
|
|
* a=12
|
|
* HTTP/1.0 200 OK
|
|
* Content-Type: text/html; charset=ISO-8859-1
|
|
* Connection: close
|
|
*
|
|
* $ nc -t 127.0.0.1 8010
|
|
* GET /dump HTTP/1.0
|
|
* Content-Type: text/plain
|
|
* Content-Encoding: UTF-8
|
|
* Connection: close
|
|
* (presione Enter)
|
|
*
|
|
* Debería mostrar:
|
|
* HTTP/1.0 200 OK
|
|
* Content-Type: text/html; charset=ISO-8859-1
|
|
* Connection: close
|
|
*
|
|
* $ nc -t 127.0.0.1 8010
|
|
* GET /unknown HTTP/1.0
|
|
* Connection: close
|
|
*
|
|
* Debería mostrar:
|
|
* HTTP/1.0 200 OK
|
|
* Content-Type: text/html; charset=ISO-8859-1
|
|
* Connection: close
|
|
*
|
|
* 3) Ver lo que el servidor muestra en el terminal anterior.
|
|
*/
|
|
|
|
function _http_dump($req, $data) {
|
|
static $counter = 0;
|
|
static $max_requests = 2;
|
|
|
|
if (++$counter >= $max_requests) {
|
|
echo "El contador ha alcanzado el número máximo de peticiones ($max_requests). ¡Salida!\n";
|
|
exit();
|
|
}
|
|
|
|
echo __METHOD__, " llamada\n";
|
|
echo "Petición :"; var_dump($req);
|
|
echo "Datos :"; var_dump($data);
|
|
|
|
echo "\n===== DUMP =====\n";
|
|
echo "Comando :", $req->getCommand(), PHP_EOL;
|
|
echo "URI :", $req->getUri(), PHP_EOL;
|
|
echo "Encabezados de entrada :"; var_dump($req->getInputHeaders());
|
|
echo "Encabezados de salida :"; var_dump($req->getOutputHeaders());
|
|
|
|
echo "\n >> Enviando la respuesta ...";
|
|
$req->sendReply(200, "OK");
|
|
echo "OK\n";
|
|
|
|
echo "\n >> Lectura del buffer de entrada ...\n";
|
|
$buf = $req->getInputBuffer();
|
|
while ($s = $buf->readLine(EventBuffer::EOL_ANY)) {
|
|
echo $s, PHP_EOL;
|
|
}
|
|
echo "No hay más datos en el buffer\n";
|
|
}
|
|
|
|
function _http_about($req) {
|
|
echo __METHOD__, PHP_EOL;
|
|
echo "URI : ", $req->getUri(), PHP_EOL;
|
|
echo "\n >> Enviando la respuesta ...";
|
|
$req->sendReply(200, "OK");
|
|
echo "OK\n";
|
|
}
|
|
|
|
function _http_default($req, $data) {
|
|
echo __METHOD__, PHP_EOL;
|
|
echo "URI: ", $req->getUri(), PHP_EOL;
|
|
echo "\n >> Enviando la respuesta ...";
|
|
$req->sendReply(200, "OK");
|
|
echo "OK\n";
|
|
}
|
|
|
|
$port = 8010;
|
|
if ($argc > 1) {
|
|
$port = (int) $argv[1];
|
|
}
|
|
if ($port <= 0 || $port > 65535) {
|
|
exit("Puerto inválido");
|
|
}
|
|
|
|
$base = new EventBase();
|
|
$http = new EventHttp($base);
|
|
$http->setAllowedMethods(EventHttpRequest::CMD_GET | EventHttpRequest::CMD_POST);
|
|
|
|
$http->setCallback("/dump", "_http_dump", array(4, 8));
|
|
$http->setCallback("/about", "_http_about");
|
|
$http->setDefaultCallback("_http_default", "valor de datos personalizados");
|
|
|
|
$http->bind("0.0.0.0", 8010);
|
|
$base->loop();
|
|
?>
|
|
]]>
|
|
</programlisting>
|
|
&example.outputs.similar;
|
|
<screen>
|
|
<![CDATA[
|
|
a=12
|
|
HTTP/1.0 200 OK
|
|
Content-Type: text/html; charset=ISO-8859-1
|
|
Connection: close
|
|
|
|
HTTP/1.0 200 OK
|
|
Content-Type: text/html; charset=ISO-8859-1
|
|
Connection: close
|
|
(presione Enter)
|
|
|
|
HTTP/1.0 200 OK
|
|
Content-Type: text/html; charset=ISO-8859-1
|
|
Connection: close
|
|
]]>
|
|
</screen>
|
|
</example>
|
|
<example>
|
|
<title>Servidor HTTPS simple</title>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
/*
|
|
* Servidor HTTPS simple.
|
|
*
|
|
* 1) Ejecute el servidor: `php examples/https.php 9999`
|
|
* 2) Pruébelo: `php examples/ssl-connection.php 9999`
|
|
*/
|
|
|
|
function _http_dump($req, $data) {
|
|
static $counter = 0;
|
|
static $max_requests = 200;
|
|
|
|
if (++$counter >= $max_requests) {
|
|
echo "El contador ha alcanzado el número máximo de peticiones ($max_requests). Salida\n";
|
|
exit();
|
|
}
|
|
|
|
echo __METHOD__, " llamada\n";
|
|
echo "Petición :"; var_dump($req);
|
|
echo "Datos :"; var_dump($data);
|
|
|
|
echo "\n===== DUMP =====\n";
|
|
echo "Comando :", $req->getCommand(), PHP_EOL;
|
|
echo "URI :", $req->getUri(), PHP_EOL;
|
|
echo "Encabezados de entrada :"; var_dump($req->getInputHeaders());
|
|
echo "Encabezados de salida :"; var_dump($req->getOutputHeaders());
|
|
|
|
echo "\n >> Enviando la respuesta ...";
|
|
$req->sendReply(200, "OK");
|
|
echo "OK\n";
|
|
|
|
$buf = $req->getInputBuffer();
|
|
echo "\n >> Lectura del buffer de entrada (", $buf->length, ") ...\n";
|
|
while ($s = $buf->read(1024)) {
|
|
echo $s;
|
|
}
|
|
echo "\nNo hay más datos en el buffer\n";
|
|
}
|
|
|
|
function _http_about($req) {
|
|
echo __METHOD__, PHP_EOL;
|
|
echo "URI : ", $req->getUri(), PHP_EOL;
|
|
echo "\n >> Enviando la respuesta ...";
|
|
$req->sendReply(200, "OK");
|
|
echo "OK\n";
|
|
}
|
|
|
|
function _http_default($req, $data) {
|
|
echo __METHOD__, PHP_EOL;
|
|
echo "URI: ", $req->getUri(), PHP_EOL;
|
|
echo "\n >> Enviando la respuesta ...";
|
|
$req->sendReply(200, "OK");
|
|
echo "OK\n";
|
|
}
|
|
|
|
function _http_400($req) {
|
|
$req->sendError(400);
|
|
}
|
|
|
|
function _init_ssl() {
|
|
$local_cert = __DIR__."/ssl-echo-server/cert.pem";
|
|
$local_pk = __DIR__."/ssl-echo-server/privkey.pem";
|
|
|
|
$ctx = new EventSslContext(EventSslContext::SSLv3_SERVER_METHOD, array (
|
|
EventSslContext::OPT_LOCAL_CERT => $local_cert,
|
|
EventSslContext::OPT_LOCAL_PK => $local_pk,
|
|
//EventSslContext::OPT_PASSPHRASE => "test",
|
|
EventSslContext::OPT_ALLOW_SELF_SIGNED => true,
|
|
));
|
|
|
|
return $ctx;
|
|
}
|
|
|
|
$port = 9999;
|
|
if ($argc > 1) {
|
|
$port = (int) $argv[1];
|
|
}
|
|
if ($port <= 0 || $port > 65535) {
|
|
exit("Puerto inválido");
|
|
}
|
|
$ip = '0.0.0.0';
|
|
|
|
$base = new EventBase();
|
|
$ctx = _init_ssl();
|
|
$http = new EventHttp($base, $ctx);
|
|
$http->setAllowedMethods(EventHttpRequest::CMD_GET | EventHttpRequest::CMD_POST);
|
|
|
|
$http->setCallback("/dump", "_http_dump", array(4, 8));
|
|
$http->setCallback("/about", "_http_about");
|
|
$http->setCallback("/err400", "_http_400");
|
|
$http->setDefaultCallback("_http_default", "Valor de los datos personalizados");
|
|
|
|
$http->bind($ip, $port);
|
|
$base->dispatch();
|
|
]]>
|
|
</programlisting>
|
|
</example>
|
|
<example>
|
|
<title>Conexión OpenSSL</title>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
/*
|
|
* Ejemplo de Cliente OpenSSL.
|
|
*
|
|
* Uso:
|
|
* 1) Ejecute un servidor, i.e. :
|
|
* $ php examples/https.php 9999
|
|
*
|
|
* 2) Lance el cliente en otro terminal:
|
|
* $ php examples/ssl-connection.php 9999
|
|
*/
|
|
|
|
function _request_handler($req, $base) {
|
|
echo __FUNCTION__, PHP_EOL;
|
|
|
|
if (is_null($req)) {
|
|
echo "Tiempo máximo de espera alcanzado\n";
|
|
} else {
|
|
$response_code = $req->getResponseCode();
|
|
|
|
if ($response_code == 0) {
|
|
echo "Conexión rechazada\n";
|
|
} elseif ($response_code != 200) {
|
|
echo "Respuesta inesperada : $response_code\n";
|
|
} else {
|
|
echo "Éxito : $response_code\n";
|
|
$buf = $req->getInputBuffer();
|
|
echo "Cuerpo :\n";
|
|
while ($s = $buf->readLine(EventBuffer::EOL_ANY)) {
|
|
echo $s, PHP_EOL;
|
|
}
|
|
}
|
|
}
|
|
|
|
$base->exit(NULL);
|
|
}
|
|
|
|
function _init_ssl() {
|
|
$ctx = new EventSslContext(EventSslContext::SSLv3_CLIENT_METHOD, array ());
|
|
|
|
return $ctx;
|
|
}
|
|
|
|
// Permite el sobrescrito del puerto
|
|
$port = 9999;
|
|
if ($argc > 1) {
|
|
$port = (int) $argv[1];
|
|
}
|
|
if ($port <= 0 || $port > 65535) {
|
|
exit("Puerto inválido\n");
|
|
}
|
|
$host = '127.0.0.1';
|
|
|
|
$ctx = _init_ssl();
|
|
if (!$ctx) {
|
|
trigger_error("Fallo en la creación del contexto SSL", E_USER_ERROR);
|
|
}
|
|
|
|
$base = new EventBase();
|
|
if (!$base) {
|
|
trigger_error("Fallo en la inicialización de la base de evento", E_USER_ERROR);
|
|
}
|
|
|
|
$conn = new EventHttpConnection($base, NULL, $host, $port, $ctx);
|
|
$conn->setTimeout(50);
|
|
|
|
$req = new EventHttpRequest("_request_handler", $base);
|
|
$req->addHeader("Host", $host, EventHttpRequest::OUTPUT_HEADER);
|
|
$buf = $req->getOutputBuffer();
|
|
$buf->add("<html>HTML TEST</html>");
|
|
//$req->addHeader("Content-Length", $buf->length, EventHttpRequest::OUTPUT_HEADER);
|
|
//$req->addHeader("Connection", "close", EventHttpRequest::OUTPUT_HEADER);
|
|
$conn->makeRequest($req, EventHttpRequest::CMD_POST, "/dump");
|
|
|
|
$base->dispatch();
|
|
echo "FIN\n";
|
|
?>
|
|
]]>
|
|
</programlisting>
|
|
</example>
|
|
<example>
|
|
<title>
|
|
Ejemplo con <function>EventHttpConnection::makeRequest</function></title>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
function _request_handler($req, $base) {
|
|
echo __FUNCTION__, PHP_EOL;
|
|
|
|
if (is_null($req)) {
|
|
echo "Tiempo máximo de espera alcanzado\n";
|
|
} else {
|
|
$response_code = $req->getResponseCode();
|
|
|
|
if ($response_code == 0) {
|
|
echo "Conexión rechazada\n";
|
|
} elseif ($response_code != 200) {
|
|
echo "Respuesta inesperada : $response_code\n";
|
|
} else {
|
|
echo "Éxito : $response_code\n";
|
|
$buf = $req->getInputBuffer();
|
|
echo "Cuerpo :\n";
|
|
while ($s = $buf->readLine(EventBuffer::EOL_ANY)) {
|
|
echo $s, PHP_EOL;
|
|
}
|
|
}
|
|
}
|
|
|
|
$base->exit(NULL);
|
|
}
|
|
|
|
$address = "127.0.0.1";
|
|
$port = 80;
|
|
|
|
$base = new EventBase();
|
|
$conn = new EventHttpConnection($base, NULL, $address, $port);
|
|
$conn->setTimeout(5);
|
|
$req = new EventHttpRequest("_request_handler", $base);
|
|
|
|
$req->addHeader("Host", $address, EventHttpRequest::OUTPUT_HEADER);
|
|
$req->addHeader("Content-Length", "0", EventHttpRequest::OUTPUT_HEADER);
|
|
$conn->makeRequest($req, EventHttpRequest::CMD_GET, "/index.cphp");
|
|
|
|
$base->loop();
|
|
?>
|
|
]]>
|
|
</programlisting>
|
|
&example.outputs.similar;
|
|
<screen>
|
|
<![CDATA[
|
|
_request_handler
|
|
Éxito : 200
|
|
Cuerpo :
|
|
PHP, date:
|
|
2013-03-13T20:27:52+05:00
|
|
]]>
|
|
</screen>
|
|
</example>
|
|
<example>
|
|
<title>Escucha de una conexión basada en un socket de dominio Unix</title>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
/*
|
|
* Servidor de escucha basado en un oyente de conexión libevent.
|
|
*
|
|
* Uso:
|
|
* 1) En un terminal, ejecute:
|
|
*
|
|
* $ php unix-domain-listener.php [ruta-al-socket]
|
|
*
|
|
* 2) En otro terminal, abra la conexión
|
|
* hacia el socket, i.e. :
|
|
*
|
|
* $ socat - GOPEN:/tmp/1.sock
|
|
*
|
|
* 3) Comience a escribir. El servidor debería repetir las entradas.
|
|
*/
|
|
|
|
class MyListenerConnection {
|
|
private $bev, $base;
|
|
|
|
public function __destruct() {
|
|
if ($this->bev) {
|
|
$this->bev->free();
|
|
}
|
|
}
|
|
|
|
public function __construct($base, $fd) {
|
|
$this->base = $base;
|
|
|
|
$this->bev = new EventBufferEvent($base, $fd, EventBufferEvent::OPT_CLOSE_ON_FREE);
|
|
|
|
$this->bev->setCallbacks(array($this, "echoReadCallback"), NULL,
|
|
array($this, "echoEventCallback"), NULL);
|
|
|
|
if (!$this->bev->enable(Event::READ)) {
|
|
echo "Fallo en la activación de READ\n";
|
|
return;
|
|
}
|
|
}
|
|
|
|
public function echoReadCallback($bev, $ctx) {
|
|
// Copia todos los datos desde el buffer de entrada hacia el buffer de salida
|
|
$bev->output->addBuffer($bev->input);
|
|
}
|
|
|
|
public function echoEventCallback($bev, $events, $ctx) {
|
|
if ($events & EventBufferEvent::ERROR) {
|
|
echo "Error desde bufferevent\n";
|
|
}
|
|
|
|
if ($events & (EventBufferEvent::EOF | EventBufferEvent::ERROR)) {
|
|
$bev->free();
|
|
$bev = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
class MyListener {
|
|
public $base,
|
|
$listener,
|
|
$socket;
|
|
private $conn = array();
|
|
|
|
public function __destruct() {
|
|
foreach ($this->conn as &$c) $c = NULL;
|
|
}
|
|
|
|
public function __construct($sock_path) {
|
|
$this->base = new EventBase();
|
|
if (!$this->base) {
|
|
echo "No se pudo abrir la base de eventos";
|
|
exit(1);
|
|
}
|
|
|
|
if (file_exists($sock_path)) {
|
|
unlink($sock_path);
|
|
}
|
|
|
|
$this->listener = new EventListener($this->base,
|
|
array($this, "acceptConnCallback"), $this->base,
|
|
EventListener::OPT_CLOSE_ON_FREE | EventListener::OPT_REUSEABLE, -1,
|
|
"unix:$sock_path");
|
|
|
|
if (!$this->listener) {
|
|
trigger_error("Imposible crear el oyente", E_USER_ERROR);
|
|
}
|
|
|
|
$this->listener->setErrorCallback(array($this, "accept_error_cb"));
|
|
}
|
|
|
|
public function dispatch() {
|
|
$this->base->dispatch();
|
|
}
|
|
|
|
// Esta función de retrollamada será llamada cuando haya datos para leer en $bev
|
|
public function acceptConnCallback($listener, $fd, $address, $ctx) {
|
|
// ¡Tenemos una nueva conexión! Se define un bufferevent para ella. */
|
|
$base = $this->base;
|
|
$this->conn[] = new MyListenerConnection($base, $fd);
|
|
}
|
|
|
|
public function accept_error_cb($listener, $ctx) {
|
|
$base = $this->base;
|
|
|
|
fprintf(STDERR, "Se recibe un error %d (%s) en el oyente. "
|
|
."Cerrando.\n",
|
|
EventUtil::getLastSocketErrno(),
|
|
EventUtil::getLastSocketError());
|
|
|
|
$base->exit(NULL);
|
|
}
|
|
}
|
|
|
|
if ($argc <= 1) {
|
|
exit("La ruta hacia el socket no está proporcionada\n");
|
|
}
|
|
$sock_path = $argv[1];
|
|
|
|
$l = new MyListener($sock_path);
|
|
$l->dispatch();
|
|
?>
|
|
]]>
|
|
</programlisting>
|
|
</example>
|
|
<example xml:id="event.example.smtp">
|
|
<title>Ejemplo de servidor SMTP</title>
|
|
<programlisting role="php">
|
|
<![CDATA[
|
|
<?php
|
|
/*
|
|
* Autor: Andrew Rose <hello at andrewrose dot co dot uk>
|
|
*
|
|
* Uso:
|
|
* 1) Prepare el certificado cert.pem y la clave privada privkey.pem.
|
|
* 2) Inicie el script del servidor
|
|
* 3) Abra la conexión TLS, i.e. :
|
|
* $ openssl s_client -connect localhost:25 -starttls smtp -crlf
|
|
* 4) Comience a probar los comandos listados en el método `cmd` a continuación.
|
|
*/
|
|
|
|
class Handler {
|
|
public $domainName = FALSE;
|
|
public $connections = [];
|
|
public $buffers = [];
|
|
public $maxRead = 256000;
|
|
|
|
public function __construct() {
|
|
$this->ctx = new EventSslContext(EventSslContext::SSLv3_SERVER_METHOD, [
|
|
EventSslContext::OPT_LOCAL_CERT => 'cert.pem',
|
|
EventSslContext::OPT_LOCAL_PK => 'privkey.pem',
|
|
//EventSslContext::OPT_PASSPHRASE => '',
|
|
EventSslContext::OPT_VERIFY_PEER => false, // cambiar a TRUE con certificados auténticos
|
|
EventSslContext::OPT_ALLOW_SELF_SIGNED => true // cambiar a FALSE con certificados auténticos
|
|
]);
|
|
|
|
$this->base = new EventBase();
|
|
if (!$this->base) {
|
|
exit("Imposible abrir la base del evento\n");
|
|
}
|
|
|
|
if (!$this->listener = new EventListener($this->base,
|
|
[$this, 'ev_accept'],
|
|
$this->ctx,
|
|
EventListener::OPT_CLOSE_ON_FREE | EventListener::OPT_REUSEABLE,
|
|
-1,
|
|
'0.0.0.0:25'))
|
|
{
|
|
exit("Imposible crear el oyente\n");
|
|
}
|
|
|
|
$this->listener->setErrorCallback([$this, 'ev_error']);
|
|
$this->base->dispatch();
|
|
}
|
|
|
|
public function ev_accept($listener, $fd, $address, $ctx) {
|
|
static $id = 0;
|
|
$id += 1;
|
|
|
|
$this->connections[$id]['clientData'] = '';
|
|
$this->connections[$id]['cnx'] = new EventBufferEvent($this->base, $fd,
|
|
EventBufferEvent::OPT_CLOSE_ON_FREE);
|
|
|
|
if (!$this->connections[$id]['cnx']) {
|
|
echo "Fallo en la creación del buffer\n";
|
|
$this->base->exit(NULL);
|
|
exit(1);
|
|
}
|
|
|
|
$this->connections[$id]['cnx']->setCallbacks([$this, "ev_read"], NULL,
|
|
[$this, 'ev_error'], $id);
|
|
$this->connections[$id]['cnx']->enable(Event::READ | Event::WRITE);
|
|
|
|
$this->ev_write($id, '220 '.$this->domainName." wazzzap?\r\n");
|
|
}
|
|
|
|
function ev_error($listener, $ctx) {
|
|
$errno = EventUtil::getLastSocketErrno();
|
|
|
|
fprintf(STDERR, "Se recibe el error %d (%s) en el oyente. Detención.\n",
|
|
$errno, EventUtil::getLastSocketError());
|
|
|
|
if ($errno != 0) {
|
|
$this->base->exit(NULL);
|
|
exit();
|
|
}
|
|
}
|
|
|
|
public function ev_close($id) {
|
|
$this->connections[$id]['cnx']->disable(Event::READ | Event::WRITE);
|
|
unset($this->connections[$id]);
|
|
}
|
|
|
|
protected function ev_write($id, $string) {
|
|
echo 'S('.$id.'): '.$string;
|
|
$this->connections[$id]['cnx']->write($string);
|
|
}
|
|
|
|
public function ev_read($buffer, $id) {
|
|
while($buffer->input->length > 0) {
|
|
$this->connections[$id]['clientData'] .= $buffer->input->read($this->maxRead);
|
|
$clientDataLen = strlen($this->connections[$id]['clientData']);
|
|
|
|
if($this->connections[$id]['clientData'][$clientDataLen-1] == "\n"
|
|
&& $this->connections[$id]['clientData'][$clientDataLen-2] == "\r")
|
|
{
|
|
// Elimina los caracteres \r\n al final
|
|
$line = substr($this->connections[$id]['clientData'], 0,
|
|
strlen($this->connections[$id]['clientData']) - 2);
|
|
|
|
$this->connections[$id]['clientData'] = '';
|
|
$this->cmd($buffer, $id, $line);
|
|
}
|
|
}
|
|
}
|
|
|
|
protected function cmd($buffer, $id, $line) {
|
|
switch ($line) {
|
|
case strncmp('EHLO ', $line, 4):
|
|
$this->ev_write($id, "250-STARTTLS\r\n");
|
|
$this->ev_write($id, "250 OK ehlo\r\n");
|
|
break;
|
|
|
|
case strncmp('HELO ', $line, 4):
|
|
$this->ev_write($id, "250-STARTTLS\r\n");
|
|
$this->ev_write($id, "250 OK helo\r\n");
|
|
break;
|
|
|
|
case strncmp('QUIT', $line, 3):
|
|
$this->ev_write($id, "250 OK quit\r\n");
|
|
$this->ev_close($id);
|
|
break;
|
|
|
|
case strncmp('STARTTLS', $line, 3):
|
|
$this->ev_write($id, "220 Ready to start TLS\r\n");
|
|
$this->connections[$id]['cnx'] = EventBufferEvent::sslFilter($this->base,
|
|
$this->connections[$id]['cnx'], $this->ctx,
|
|
EventBufferEvent::SSL_ACCEPTING,
|
|
EventBufferEvent::OPT_CLOSE_ON_FREE);
|
|
$this->connections[$id]['cnx']->setCallbacks([$this, "ev_read"], NULL, [$this, 'ev_error'], $id);
|
|
$this->connections[$id]['cnx']->enable(Event::READ | Event::WRITE);
|
|
break;
|
|
|
|
default:
|
|
echo 'Comando desconocido : '.$line."\n";
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
new Handler();
|
|
]]>
|
|
</programlisting>
|
|
</example>
|
|
</chapter>
|
|
<!-- Keep this comment at the end of the file
|
|
Local variables:
|
|
mode: sgml
|
|
sgml-omittag:t
|
|
sgml-shorttag:t
|
|
sgml-minimize-attributes:nil
|
|
sgml-always-quote-attributes:t
|
|
sgml-indent-step:1
|
|
sgml-indent-data:t
|
|
indent-tabs-mode:nil
|
|
sgml-parent-document:nil
|
|
sgml-default-dtd-file:"~/.phpdoc/manual.ced"
|
|
sgml-exposed-tags:nil
|
|
sgml-local-catalogs:nil
|
|
sgml-local-ecat-files:nil
|
|
End:
|
|
vim600: syn=xml fen fdm=syntax fdl=2 si
|
|
vim: et tw=78 syn=sgml
|
|
vi: ts=1 sw=1
|
|
-->
|