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<div id="eventhttp.setcallback" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">EventHttp::setCallback</h1>
  <p class="verinfo">(PECL event &gt;= 1.4.0-beta)</p><p class="refpurpose"><span class="refname">EventHttp::setCallback</span> &mdash; <span class="dc-title">Sets a callback for specified URI</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-eventhttp.setcallback-description">
  <h3 class="title">Beschreibung</h3>
  <div class="methodsynopsis dc-description">
   <span class="modifier">public</span>
   <span class="modifier">function</span> <span class="methodname"><strong>EventHttp::setCallback</strong></span>(<span class="methodparam">
    
    <span class="type"><a href="language.types.string.php" class="type string">string</a></span> <code class="parameter">$path</code>
   </span>, <span class="methodparam">
    
    <span class="type"><a href="language.types.string.php" class="type string">string</a></span> <code class="parameter">$cb</code>
   </span>, <span class="methodparam">
    
    <span class="type"><a href="language.types.string.php" class="type string">string</a></span> <code class="parameter">$arg</code>
   <span class="initializer"> = ?</span></span>): <span class="type"><a href="language.types.void.php" class="type void">void</a></span></div>

  <p class="para rdfs-comment">
   Sets a callback for specified URI.
  </p>
 </div>

 <div class="refsect1 parameters" id="refsect1-eventhttp.setcallback-parameters">
  <h3 class="title">Parameter-Liste</h3>
  <dl>
   
    <dt>
     <code class="parameter">path</code>
    </dt>
    <dd>
     <p class="para">
      The path for which to invoke the callback.
     </p>
    </dd>
   
   
    <dt>
     <code class="parameter">cb</code>
    </dt>
    <dd>
     <p class="para">
      The callback
      <span class="type"><a href="language.types.callable.php" class="type callable">callable</a></span>
      that gets invoked on requested
      <code class="parameter">path</code>.
      It should match the following prototype:
     </p>
     <div class="methodsynopsis dc-description">
      <span class="modifier">function</span> <span class="methodname"><strong>callback</strong></span>(<span class="methodparam">
       
       <span class="type"><a href="class.eventhttprequest.php" class="type EventHttpRequest">EventHttpRequest</a></span> <code class="parameter">$req</code>
       <span class="initializer"> = NULL</span>
      </span>, <span class="methodparam">
       
       <span class="type"><a href="language.types.mixed.php" class="type mixed">mixed</a></span> <code class="parameter">$arg</code>
       <span class="initializer"> = NULL</span>
      </span>): <span class="type"><a href="language.types.void.php" class="type void">void</a></span></div>

     <dl>
      
       <dt>
        <code class="parameter">req</code>
       </dt>
       <dd>
        <p class="para">
         <span class="classname"><a href="class.eventhttprequest.php" class="classname">EventHttpRequest</a></span>
         object.
        </p>
       </dd>
      
      
       <dt>
        <code class="parameter">arg</code>
       </dt>
       <dd>
        <p class="para">
         Custom data.
        </p>
       </dd>
      
     </dl>
    </dd>
   
   
    <dt>
     <code class="parameter">arg</code>
    </dt>
    <dd>
     <p class="para">
      Custom data.
     </p>
    </dd>
   
  </dl>
 </div>

 <div class="refsect1 returnvalues" id="refsect1-eventhttp.setcallback-returnvalues">
  <h3 class="title">Rückgabewerte</h3>
  <p class="para">
   Gibt bei Erfolg <strong><code><a href="reserved.constants.php#constant.true">true</a></code></strong> zurück. Bei einem Fehler wird <strong><code><a href="reserved.constants.php#constant.false">false</a></code></strong> zurückgegeben.
  </p>
 </div>

 <div class="refsect1 examples" id="refsect1-eventhttp.setcallback-examples">
  <h3 class="title">Beispiele</h3>
  <div class="example" id="example-1">
   <p><strong>Beispiel #1 
    <span class="function"><strong>EventHttp::setCallback()</strong></span> example</strong></p>
   <div class="example-contents">
<div class="phpcode"><pre><code style="color: #000000"><span style="color: #0000BB">&lt;?php
</span><span style="color: #FF8000">/*
 * Simple HTTP server.
 *
 * To test it:
 * 1) Run it on a port of your choice, e.g.:
 * $ php examples/http.php 8010
 * 2) In another terminal connect to some address on this port
 * and make GET or POST request(others are turned off here), e.g.:
 * $ nc -t 127.0.0.1 8010
 * POST /about HTTP/1.0
 * Content-Type: text/plain
 * Content-Length: 4
 * Connection: close
 * (press Enter)
 *
 * It will output
 * a=12
 * HTTP/1.0 200 OK
 * Content-Type: text/html; charset=ISO-8859-1
 * Connection: close
 *
 * 3) See what the server outputs on the previous terminal window.
 */

</span><span style="color: #007700">function </span><span style="color: #0000BB">_http_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$req</span><span style="color: #007700">, </span><span style="color: #0000BB">$data</span><span style="color: #007700">) {
    static </span><span style="color: #0000BB">$counter      </span><span style="color: #007700">= </span><span style="color: #0000BB">0</span><span style="color: #007700">;
    static </span><span style="color: #0000BB">$max_requests </span><span style="color: #007700">= </span><span style="color: #0000BB">2</span><span style="color: #007700">;

    if (++</span><span style="color: #0000BB">$counter </span><span style="color: #007700">&gt;= </span><span style="color: #0000BB">$max_requests</span><span style="color: #007700">)  {
        echo </span><span style="color: #DD0000">"Counter reached max requests </span><span style="color: #0000BB">$max_requests</span><span style="color: #DD0000">. Exiting\n"</span><span style="color: #007700">;
        exit();
    }

    echo </span><span style="color: #0000BB">__METHOD__</span><span style="color: #007700">, </span><span style="color: #DD0000">" called\n"</span><span style="color: #007700">;
    echo </span><span style="color: #DD0000">"request:"</span><span style="color: #007700">; </span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$req</span><span style="color: #007700">);
    echo </span><span style="color: #DD0000">"data:"</span><span style="color: #007700">; </span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$data</span><span style="color: #007700">);

    echo </span><span style="color: #DD0000">"\n===== DUMP =====\n"</span><span style="color: #007700">;
    echo </span><span style="color: #DD0000">"Command:"</span><span style="color: #007700">, </span><span style="color: #0000BB">$req</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">getCommand</span><span style="color: #007700">(), </span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;
    echo </span><span style="color: #DD0000">"URI:"</span><span style="color: #007700">, </span><span style="color: #0000BB">$req</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">getUri</span><span style="color: #007700">(), </span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;
    echo </span><span style="color: #DD0000">"Input headers:"</span><span style="color: #007700">; </span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$req</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">getInputHeaders</span><span style="color: #007700">());
    echo </span><span style="color: #DD0000">"Output headers:"</span><span style="color: #007700">; </span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$req</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">getOutputHeaders</span><span style="color: #007700">());

    echo </span><span style="color: #DD0000">"\n &gt;&gt; Sending reply ..."</span><span style="color: #007700">;
    </span><span style="color: #0000BB">$req</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">sendReply</span><span style="color: #007700">(</span><span style="color: #0000BB">200</span><span style="color: #007700">, </span><span style="color: #DD0000">"OK"</span><span style="color: #007700">);
    echo </span><span style="color: #DD0000">"OK\n"</span><span style="color: #007700">;

    echo </span><span style="color: #DD0000">"\n &gt;&gt; Reading input buffer ...\n"</span><span style="color: #007700">;
    </span><span style="color: #0000BB">$buf </span><span style="color: #007700">= </span><span style="color: #0000BB">$req</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">getInputBuffer</span><span style="color: #007700">();
    while (</span><span style="color: #0000BB">$s </span><span style="color: #007700">= </span><span style="color: #0000BB">$buf</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">readLine</span><span style="color: #007700">(</span><span style="color: #0000BB">EventBuffer</span><span style="color: #007700">::</span><span style="color: #0000BB">EOL_ANY</span><span style="color: #007700">)) {
        echo </span><span style="color: #0000BB">$s</span><span style="color: #007700">, </span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;
    }
    echo </span><span style="color: #DD0000">"No more data in the buffer\n"</span><span style="color: #007700">;
}

function </span><span style="color: #0000BB">_http_about</span><span style="color: #007700">(</span><span style="color: #0000BB">$req</span><span style="color: #007700">) {
    echo </span><span style="color: #0000BB">__METHOD__</span><span style="color: #007700">, </span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;
    echo </span><span style="color: #DD0000">"URI: "</span><span style="color: #007700">, </span><span style="color: #0000BB">$req</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">getUri</span><span style="color: #007700">(), </span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;
    echo </span><span style="color: #DD0000">"\n &gt;&gt; Sending reply ..."</span><span style="color: #007700">;
    </span><span style="color: #0000BB">$req</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">sendReply</span><span style="color: #007700">(</span><span style="color: #0000BB">200</span><span style="color: #007700">, </span><span style="color: #DD0000">"OK"</span><span style="color: #007700">);
    echo </span><span style="color: #DD0000">"OK\n"</span><span style="color: #007700">;
}

function </span><span style="color: #0000BB">_http_default</span><span style="color: #007700">(</span><span style="color: #0000BB">$req</span><span style="color: #007700">, </span><span style="color: #0000BB">$data</span><span style="color: #007700">) {
    echo </span><span style="color: #0000BB">__METHOD__</span><span style="color: #007700">, </span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;
    echo </span><span style="color: #DD0000">"URI: "</span><span style="color: #007700">, </span><span style="color: #0000BB">$req</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">getUri</span><span style="color: #007700">(), </span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;
    echo </span><span style="color: #DD0000">"\n &gt;&gt; Sending reply ..."</span><span style="color: #007700">;
    </span><span style="color: #0000BB">$req</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">sendReply</span><span style="color: #007700">(</span><span style="color: #0000BB">200</span><span style="color: #007700">, </span><span style="color: #DD0000">"OK"</span><span style="color: #007700">);
    echo </span><span style="color: #DD0000">"OK\n"</span><span style="color: #007700">;
}

</span><span style="color: #0000BB">$port </span><span style="color: #007700">= </span><span style="color: #0000BB">8010</span><span style="color: #007700">;
if (</span><span style="color: #0000BB">$argc </span><span style="color: #007700">&gt; </span><span style="color: #0000BB">1</span><span style="color: #007700">) {
    </span><span style="color: #0000BB">$port </span><span style="color: #007700">= (int) </span><span style="color: #0000BB">$argv</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">];
}
if (</span><span style="color: #0000BB">$port </span><span style="color: #007700">&lt;= </span><span style="color: #0000BB">0 </span><span style="color: #007700">|| </span><span style="color: #0000BB">$port </span><span style="color: #007700">&gt; </span><span style="color: #0000BB">65535</span><span style="color: #007700">) {
    exit(</span><span style="color: #DD0000">"Invalid port"</span><span style="color: #007700">);
}

</span><span style="color: #0000BB">$base </span><span style="color: #007700">= new </span><span style="color: #0000BB">EventBase</span><span style="color: #007700">();
</span><span style="color: #0000BB">$http </span><span style="color: #007700">= new </span><span style="color: #0000BB">EventHttp</span><span style="color: #007700">(</span><span style="color: #0000BB">$base</span><span style="color: #007700">);
</span><span style="color: #0000BB">$http</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">setAllowedMethods</span><span style="color: #007700">(</span><span style="color: #0000BB">EventHttpRequest</span><span style="color: #007700">::</span><span style="color: #0000BB">CMD_GET </span><span style="color: #007700">| </span><span style="color: #0000BB">EventHttpRequest</span><span style="color: #007700">::</span><span style="color: #0000BB">CMD_POST</span><span style="color: #007700">);

</span><span style="color: #0000BB">$http</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">setCallback</span><span style="color: #007700">(</span><span style="color: #DD0000">"/dump"</span><span style="color: #007700">, </span><span style="color: #DD0000">"_http_dump"</span><span style="color: #007700">, array(</span><span style="color: #0000BB">4</span><span style="color: #007700">, </span><span style="color: #0000BB">8</span><span style="color: #007700">));
</span><span style="color: #0000BB">$http</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">setCallback</span><span style="color: #007700">(</span><span style="color: #DD0000">"/about"</span><span style="color: #007700">, </span><span style="color: #DD0000">"_http_about"</span><span style="color: #007700">);
</span><span style="color: #0000BB">$http</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">setDefaultCallback</span><span style="color: #007700">(</span><span style="color: #DD0000">"_http_default"</span><span style="color: #007700">, </span><span style="color: #DD0000">"custom data value"</span><span style="color: #007700">);

</span><span style="color: #0000BB">$http</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">bind</span><span style="color: #007700">(</span><span style="color: #DD0000">"0.0.0.0"</span><span style="color: #007700">, </span><span style="color: #0000BB">8010</span><span style="color: #007700">);
</span><span style="color: #0000BB">$base</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">loop</span><span style="color: #007700">();
</span><span style="color: #0000BB">?&gt;</span></code></pre></div>
   </div>

   <div class="example-contents"><p>Das oben gezeigte Beispiel erzeugt
eine ähnliche Ausgabe wie:</p></div>
   <div class="example-contents screen">
<div class="examplescode"><pre class="examplescode">a=12
HTTP/1.0 200 OK
Content-Type: text/html; charset=ISO-8859-1
Connection: close</pre>
</div>
   </div>
  </div>
 </div>

 <div class="refsect1 seealso" id="refsect1-eventhttp.setcallback-seealso">
  <h3 class="title">Siehe auch</h3>
  <ul class="simplelist">
   <li>
    <span class="methodname"><a href="eventhttp.setdefaultcallback.php" class="methodname" rel="rdfs-seeAlso">EventHttp::setDefaultCallback()</a> - Sets default callback to handle requests that are not caught by specific callbacks</span>
   </li>
  </ul>
 </div>

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