mixed messages in a stream

[Brad Taylor]

Is it allowed to send and receive mixed messages in a stream?  Treat iis I have a proto file with two message, a header message and a content message.  I want my server to receive one header and a random amount of content messages.  It looks like the rpc directive only allows a single message definition.  I considered using repeated field, but that looks like it only accepts a constant value at definition time, not a computed one at run time. 

[Kannan Jayaprakasam]

You can define a oneof message that is one of header message or content message, and define your RPC as a stream of this oneof message type.