Rename ReceivedHeader -> {Request,Response}Header

Especially on user-facing types, use the familar request/response
terminology instead of sender/receiver.

See #53.

client_duplex_stream.go

@@ -40,7 +40,7 @@ var _ Receiver = (*clientReceiver)(nil)
 func (cr *clientReceiver) Receive(m any) error { return cr.stream.Receive(m) }
 func (cr *clientReceiver) Close() error        { return cr.stream.CloseReceive() }
 func (cr *clientReceiver) Spec() Specification { return cr.stream.Spec() }
-func (cr *clientReceiver) Header() http.Header { return cr.stream.ReceivedHeader() }
+func (cr *clientReceiver) Header() http.Header { return cr.stream.ResponseHeader() }
 
 // clientStream represents a bidirectional exchange of protobuf messages
 // between the client and server. The request body is the stream from client to
@@ -186,7 +186,7 @@ func (cs *clientStream) CloseReceive() error {
 	return nil
 }
 
-func (cs *clientStream) ReceivedHeader() http.Header {
+func (cs *clientStream) ResponseHeader() http.Header {
 	<-cs.responseReady
 	return cs.response.Header
 }

clientstream/stream.go

@@ -68,9 +68,9 @@ func (s *Server[Res]) Receive() (*Res, error) {
 	return &res, nil
 }
 
-// ReceivedHeader returns the headers received from the server. It blocks until
+// ResponseHeader returns the headers received from the server. It blocks until
 // the first call to Receive returns.
-func (s *Server[Res]) ReceivedHeader() http.Header {
+func (s *Server[Res]) ResponseHeader() http.Header {
 	return s.receiver.Header()
 }
 
@@ -122,8 +122,8 @@ func (b *Bidirectional[Req, Res]) CloseReceive() error {
 	return b.receiver.Close()
 }
 
-// ReceivedHeader returns the headers received from the server. It blocks until
+// ResponseHeader returns the headers received from the server. It blocks until
 // the first call to Receive returns.
-func (b *Bidirectional[Req, Res]) ReceivedHeader() http.Header {
+func (b *Bidirectional[Req, Res]) ResponseHeader() http.Header {
 	return b.receiver.Header()
 }

handlerstream/stream.go

@@ -19,8 +19,8 @@ func NewClient[Req, Res any](s rerpc.Sender, r rerpc.Receiver) *Client[Req, Res]
 	return &Client[Req, Res]{sender: s, receiver: r}
 }
 
-// ReceivedHeader returns the headers received from the client.
-func (c *Client[Req, Res]) ReceivedHeader() http.Header {
+// RequestHeader returns the headers received from the client.
+func (c *Client[Req, Res]) RequestHeader() http.Header {
 	return c.receiver.Header()
 }
 
@@ -80,8 +80,8 @@ func NewBidirectional[Req, Res any](s rerpc.Sender, r rerpc.Receiver) *Bidirecti
 	return &Bidirectional[Req, Res]{sender: s, receiver: r}
 }
 
-// ReceivedHeader returns the headers received from the client.
-func (b *Bidirectional[Req, Res]) ReceivedHeader() http.Header {
+// RequestHeader returns the headers received from the client.
+func (b *Bidirectional[Req, Res]) RequestHeader() http.Header {
 	return b.receiver.Header()
 }