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