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POHow do I stop embedded sound clips from being downloaded to the browser cache before they are requested to be played?
 

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  1. POHow do I stop embedded sound clips from being downloaded to the browser cache before they are requested to be played?
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    <p>I have been scratching my head with this one for a few days,</p> <p>I am building a web app for a client associated with call tracking. One aspect of the system is to allow for short recorded voicemail messages to be played directly from a "play" button beside the message details.</p> <p>I am accessing the sound files as such;</p> <pre><code>$wavefile=$calls_row['recording']; if (file_exists("/var/spool/asterisk/monitor/".$calls_row['recording'].".wav")){ $wavefile=" &lt;form&gt; &lt;input type=\"button\" value=\"Play\" onClick=\"PlaySound('clip-".$stat_id."')\" /&gt; &lt;/form&gt; &lt;embed src=\"pass-thru.php?f=".$calls_row['recording'].".wav\" autostart=\"false\" width=\"0\" height=\"0\" id=\"clip-".$stat_id."\" enablejavascript=\"true\" /&gt; "; } </code></pre> <p>The sound clips are stored outside the web root in a directory I have been told we cannot change. Being unable to get at the files locally I put together a small php pass-through script to pass me the file back to my web page.</p> <p>The sound clip is using a small piece of javascript to get the ID of the link for the specified file before playing it;</p> <pre><code>function PlaySound(soundobj) { var thissound=document.getElementById(soundobj); thissound.Play(); } </code></pre> <p>The files are accessed outside the webroot and passed to the html by the following php code;</p> <pre><code>$basedir = '/var/spool/asterisk/monitor'; $clip = $_GET['f']; $file = $basedir.'/'.$clip; $ext = array_pop(explode ('.', $file)); if(file_exists($file) &amp;&amp; $ext != '' &amp;&amp; isset($allowed[strToLower($ext)])) { $type = $allowed[strToLower($ext)]; } header("Content-type: audio/x-wav"); header("Content-Disposition: filename='{$file}'"); header("Content-Transfer-Encoding: binary"); header('Content-Length: ' . filesize($file)); readfile($file); exit(); </code></pre> <p>Everything works fine as it should, the clips are passed through and the sound clips play in the browser.</p> <p>The problem is that all of the soundclips are loaded into the cache when the page loads, obviously slowing things down a bit. I have the results paginated so its only downloading 25 at a time but I would really love to just have the links to the soundclips available and that they are only downloaded when selected to be played.</p> <p>Any ideas would be appreciated.</p>
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