title: Maintaining persistent connection with HTTP server so as to get continuous stream
body: <p>this is the procedure of requirement.</p>
  
  <p>1) I make a request, which will make a connection. It might break, but should be notified to programmer by callback.</p>
  
  <p>2) the data comes as a stream from endless page in chunks.</p>
  
  <p>3) I want suggestion because normal NSURLConnection wont be handy as it will break in no time.
  Input here is endless page from which stream comes.</p>
  
  <p>Note: Endless stream might be empty and asynchronous.
  Any suggestions?</p>
  
  <p>Thanks in advance.</p>