unix> curl --dump - http://localhost:8529/_api/document/products1/19214938

HTTP/1.1 200 OK
content-type: application/json; charset=utf-8
etag: "19214938"

{ 
  "hallo" : "world", 
  "_id" : "products1/19214938", 
  "_rev" : "19214938", 
  "_key" : "19214938" 
}