title: Download files as .zip via cmis
body: <p>I'm currently developing a native android application and try to access some pictures on a document server. For communication I'm using the <code>OpenCMIS</code> library.</p>
  
  <p>My goal is to download the pictures and save them to the device's internal storage or sd card. My question is, whether there is a possibility to download the files as a compressed archive like a .zip for example and extract this on the device? So instead of downloading a lot of files separately, I'd like to download one big file.</p>
  
  <p>Is this something <code>OpenCMIS</code> is capable of? Or is this depending on the document server? I'm working with SAP Mobile Documents and know that I can download a whole folder as a .zip from the web interface over a browser, but I haven't found something about that being possible in a custom android client.</p>
  
  <p>Any hints or explanations are appreciated, thanks in advance!</p>