mirror of
https://github.com/php/doc-es.git
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Philippe DELENTE
9f7804a633
* feat(translation): update revision EN * feat(translation): update revision EN
301 lines
9.0 KiB
XML
301 lines
9.0 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- EN-Revision: 561e36d646b8e48dc53a910234ee9f30cba147d0 Maintainer: PhilDaiguille Status: ready -->
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<!-- Reviewed: no -->
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<refentry xml:id="function.stream-notification-callback" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
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<refnamediv>
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<refname>stream_notification_callback</refname>
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<refpurpose>Una función de retrollamada para el parámetro de contexto <literal>notification</literal></refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis>
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<type>void</type><methodname><replaceable>stream_notification_callback</replaceable></methodname>
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<methodparam><type>int</type><parameter>notification_code</parameter></methodparam>
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<methodparam><type>int</type><parameter>severity</parameter></methodparam>
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<methodparam><type class="union"><type>string</type><type>null</type></type><parameter>message</parameter></methodparam>
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<methodparam><type>int</type><parameter>message_code</parameter></methodparam>
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<methodparam><type>int</type><parameter>bytes_transferred</parameter></methodparam>
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<methodparam><type>int</type><parameter>bytes_max</parameter></methodparam>
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</methodsynopsis>
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<para>
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Una función de retrollamada de tipo <type>callable</type>, utilizada por el
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<link linkend="context.params.notification">parámetro de contexto notification</link>,
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llamada durante un evento.
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</para>
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<note>
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<para>
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Esto <emphasis>no</emphasis> es una función real, únicamente un prototipo de
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cómo debe ser la función.
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</para>
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</note>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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<para>
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<variablelist>
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<varlistentry>
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<term><parameter>notification_code</parameter></term>
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<listitem>
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<para>
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Una de las constantes de notificación <constant>STREAM_NOTIFY_<replaceable>*</replaceable></constant>.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>severity</parameter></term>
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<listitem>
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<para>
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Una de las constantes de notificación <constant>STREAM_NOTIFY_SEVERITY_<replaceable>*</replaceable></constant>.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>message</parameter></term>
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<listitem>
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<para>
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Pasado si un mensaje descriptivo está disponible para este evento.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>message_code</parameter></term>
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<listitem>
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<para>
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Pasado si un código de mensaje descriptivo está disponible para este evento.
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</para>
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<para>
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El significado de este valor depende del gestor específico utilizado.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>bytes_transferred</parameter></term>
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<listitem>
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<para>
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Si es posible, <parameter>bytes_transferred</parameter> será rellenado.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>bytes_max</parameter></term>
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<listitem>
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<para>
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Si es posible, <parameter>bytes_max</parameter> será rellenado.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect1>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<para>
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&return.void;
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</para>
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</refsect1>
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<refsect1 role="changelog">
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&reftitle.changelog;
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<informaltable>
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<tgroup cols="2">
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<thead>
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<row>
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<entry>&Version;</entry>
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<entry>&Description;</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry>8.3.0</entry>
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<entry>
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Soporte para <constant>STREAM_NOTIFY_COMPLETED</constant> implementado,
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las versiones anteriores de PHP nunca desencadenaban esta notificación.
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</entry>
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</row>
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</tbody>
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</tgroup>
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</informaltable>
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</refsect1>
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<refsect1 role="examples">
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&reftitle.examples;
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<para>
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<example xml:id="stream-notification-callback.example.basic"><!-- {{{ -->
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<title>Ejemplo con <function>stream_notification_callback</function></title>
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<programlisting role="php">
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<![CDATA[
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<?php
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function stream_notification_callback($notification_code, $severity, $message, $message_code, $bytes_transferred, $bytes_max) {
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switch($notification_code) {
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case STREAM_NOTIFY_RESOLVE:
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case STREAM_NOTIFY_AUTH_REQUIRED:
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case STREAM_NOTIFY_COMPLETED:
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case STREAM_NOTIFY_FAILURE:
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case STREAM_NOTIFY_AUTH_RESULT:
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var_dump($notification_code, $severity, $message, $message_code, $bytes_transferred, $bytes_max);
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/* Ignorar */
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break;
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case STREAM_NOTIFY_REDIRECTED:
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echo "Redirección a: ", $message;
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break;
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case STREAM_NOTIFY_CONNECT:
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echo "Conectado...";
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break;
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case STREAM_NOTIFY_FILE_SIZE_IS:
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echo "Obteniendo el tamaño del fichero: ", $bytes_max;
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break;
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case STREAM_NOTIFY_MIME_TYPE_IS:
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echo "Tipo mime encontrado: ", $message;
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break;
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case STREAM_NOTIFY_PROGRESS:
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echo "Descargando, ya ", $bytes_transferred, " bytes transferidos";
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break;
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}
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echo "\n";
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}
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$ctx = stream_context_create();
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stream_context_set_params($ctx, array("notification" => "stream_notification_callback"));
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file_get_contents("http://php.net/contact", false, $ctx);
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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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Conectado...
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Tipo mime encontrado: text/html; charset=utf-8
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Redirección a: http://no.php.net/contact
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Conectado...
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Obteniendo el tamaño del fichero: 0
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Tipo mime encontrado: text/html; charset=utf-8
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Redirección a: http://no.php.net/contact.php
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Conectado...
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Obteniendo el tamaño del fichero: 4589
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Tipo mime encontrado: text/html;charset=utf-8
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Descargando, ya 0 bytes transferidos
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Descargando, ya 0 bytes transferidos
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Descargando, ya 0 bytes transferidos
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Descargando, ya 1440 bytes transferidos
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Descargando, ya 2880 bytes transferidos
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Descargando, ya 4320 bytes transferidos
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Descargando, ya 5760 bytes transferidos
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Descargando, ya 6381 bytes transferidos
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Descargando, ya 7002 bytes transferidos
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]]>
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</screen>
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</example>
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</para>
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<para>
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<example xml:id="stream-notification-callback.example.download">
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<title>Barra de progreso simple para un cliente de descarga en línea de comandos</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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function usage($argv) {
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echo "Uso:\n";
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printf("\tphp %s <http://example.com/file> <localfile>\n", $argv[0]);
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exit(1);
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}
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function stream_notification_callback($notification_code, $severity, $message, $message_code, $bytes_transferred, $bytes_max) {
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static $filesize = null;
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switch($notification_code) {
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case STREAM_NOTIFY_RESOLVE:
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case STREAM_NOTIFY_AUTH_REQUIRED:
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case STREAM_NOTIFY_COMPLETED:
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case STREAM_NOTIFY_FAILURE:
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case STREAM_NOTIFY_AUTH_RESULT:
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/* Ignorar */
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break;
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case STREAM_NOTIFY_REDIRECTED:
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echo "Redirección a: ", $message, "\n";
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break;
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case STREAM_NOTIFY_CONNECT:
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echo "Conectado...\n";
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break;
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case STREAM_NOTIFY_FILE_SIZE_IS:
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$filesize = $bytes_max;
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echo "Tamaño del fichero: ", $filesize, "\n";
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break;
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case STREAM_NOTIFY_MIME_TYPE_IS:
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echo "Tipo Mime: ", $message, "\n";
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break;
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case STREAM_NOTIFY_PROGRESS:
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if ($bytes_transferred > 0) {
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if (!isset($filesize)) {
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printf("\rTamaño del fichero desconocido.. %2d kb hechos..", $bytes_transferred/1024);
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} else {
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$length = (int) (($bytes_transferred/$filesize)*100);
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printf("\r[%-100s] %d%% (%2d/%2d kb)", str_repeat("=", $length). ">", $length, ($bytes_transferred/1024), $filesize/1024);
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}
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}
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break;
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}
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}
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isset($argv[1], $argv[2]) or usage($argv);
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$ctx = stream_context_create();
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stream_context_set_params($ctx, array("notification" => "stream_notification_callback"));
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$fp = fopen($argv[1], "r", false, $ctx);
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if (is_resource($fp) && file_put_contents($argv[2], $fp)) {
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echo "\n¡Hecho!\n";
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exit(0);
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}
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$err = error_get_last();
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echo "\n¡Error!\n", $err["message"], "\n";
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exit(1);
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?>
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]]>
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</programlisting>
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<para>
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Ejecute el ejemplo anterior con:
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<literal>php -n fetch.php
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http://no2.php.net/get/php-5-LATEST.tar.bz2/from/this/mirror
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php-latest.tar.bz2</literal> mostrará algo similar a:
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</para>
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<screen>
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<![CDATA[
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Conectado...
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Tipo Mime: text/html; charset=utf-8
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Redirección a: http://no2.php.net/distributions/php-5.2.5.tar.bz2
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Conectado...
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Tamaño del fichero: 7773024
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Tipo Mime: application/octet-stream
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[========================================> ] 40% (3076/7590 kb)
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]]>
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</screen>
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</example>
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</para>
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</refsect1>
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<refsect1 role="seealso">
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&reftitle.seealso;
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<para>
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<simplelist>
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<member><xref linkend="context.params" /></member>
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</simplelist>
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</para>
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</refsect1>
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</refentry>
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