grpc/interceptors/metadata/forward.go
Adphi c7096975b1
interceptors: add ban
health: set services serving on start and not available on close

Signed-off-by: Adphi <philippe.adrien.nousse@gmail.com>
2022-09-27 17:06:18 +02:00

41 lines
1.1 KiB
Go

package metadata
import (
"context"
"google.golang.org/grpc"
"google.golang.org/grpc/metadata"
"go.linka.cloud/grpc/interceptors"
)
func NewForwardInterceptors() interceptors.ServerInterceptors {
return &forward{}
}
type forward struct{}
func (f *forward) UnaryServerInterceptor() grpc.UnaryServerInterceptor {
return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (resp interface{}, err error) {
if md, ok := metadata.FromIncomingContext(ctx); ok {
ctx = metadata.NewOutgoingContext(ctx, md.Copy())
}
return handler(ctx, req)
}
}
func (f *forward) StreamServerInterceptor() grpc.StreamServerInterceptor {
return func(srv interface{}, ss grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
ctx := ss.Context()
md1, ok := metadata.FromIncomingContext(ctx)
if !ok {
return handler(srv, ss)
}
o := md1.Copy()
if md2, ok := metadata.FromOutgoingContext(ctx); ok {
o = metadata.Join(o, md2.Copy())
}
return handler(srv, interceptors.NewContextServerStream(metadata.NewOutgoingContext(ctx, o), ss))
}
}