title: What is the HTTP "content-type" to use for a blob of bytes?
body: <p>What is the HTTP "content-type" to use when returning a blob of bytes in response to a client's GET request?</p>
  
  <p>In this case, the information payload is an object serialized using Python's <a href="http://docs.python.org/2/library/pickle.html" rel="noreferrer">Pickle</a> library.</p>