Quickie regular expression stuck
<p>I have a line of stringy goodness:</p>

<pre><code>"B8&amp;amp;soundFile=http%3A%2F%2Fwww.example.com%2Faeero%2Fj34d1.mp3%2Chttp%3A%2F%2Fwww.example.com%2Faudfgo%2set4.mp3"
</code></pre>

<p>Can I use regular expressions to just extract the http up to mp3 for all times it exists?</p>

<p>I have tried reading the documents for regular expressions but none mention how to go FROM http to mp3.  Can anyone help?</p>
