title: Node JS: Unzip File with ADM
body: <p>im trying to unzip a File with NodeJS and Express. I tried ADM-Zip.</p>
  
  <p>I typed:</p>
  
  <pre><code>npm install adm-zip
  </code></pre>
  
  <p>and got:</p>
  
  <pre><code>npm WARN package.json express-namespace@0.1.1 No repository field.
  </code></pre>
  
  <p>Everything else went fine.</p>
  
  <p>My Code is:</p>
  
  <pre><code>var AdmZip = require('adm-zip');
  var zip = new AdmZip("/scenario/file/05ae5db61e83b7611570f2a313f778dd1c8-7c32.zip");
  zip.extractAllTo("scenario/file/", true);
  </code></pre>
  
  <p>The zip-File is in my public Folder (Express). All I got is an console output with the text "undefined".</p>
  
  <p>I'm a node newbie and have no idea what I should try.</p>
  
  <p>It would be nice if someone could help me</p>