send client error if it exists

client/rpc_codec.go

@@ -126,6 +126,7 @@ func setHeaders(m *codec.Message) {
 	set("Micro-Service", m.Target)
 	set("Micro-Method", m.Method)
 	set("Micro-Endpoint", m.Endpoint)
+	set("Micro-Error", m.Error)
 }
 
 // setupProtocol sets up the old protocol

server/rpc_stream.go

@@ -2,6 +2,8 @@ package server
 
 import (
 	"context"
+	"errors"
+	"io"
 	"sync"
 
 	"github.com/micro/go-micro/codec"
@@ -59,6 +61,20 @@ func (r *rpcStream) Recv(msg interface{}) error {
 		return err
 	}
 
+	// check the error
+	if len(req.Error) > 0 {
+		// Check the client closed the stream
+		switch req.Error {
+		case lastStreamResponseError.Error():
+			// discard body
+			r.codec.ReadBody(nil)
+			r.err = io.EOF
+			return io.EOF
+		default:
+			return errors.New(req.Error)
+		}
+	}
+
 	// we need to stay up to date with sequence numbers
 	r.id = req.Id
 	if err := r.codec.ReadBody(msg); err != nil {