title: Server product delivery model with Android in-app purchases?
body: <p>Say the app sells songs and the actual songs are stored on an outside server.</p>
  
  <p>The app sends a download request for a song. The server now needs to authenticate that the user has actually bought the song before sending the MP3 file.</p>
  
  <p>Apple provides a simple API through which the server can verify the request. <a href="http://developer.apple.com/library/ios/#documentation/NetworkingInternet/Conceptual/StoreKitGuide/VerifyingStoreReceipts/VerifyingStoreReceipts.html#//apple_ref/doc/uid/TP40008267-CH104-SW1" rel="nofollow" title="Apple In-App purchases: Verifying Store Receipts">See here</a>.</p>
  
  <p>Browsing through Android developer documentation I didn't find anything on the subject, so how does one solve the problem?</p>