mirror of https://github.com/linka-cloud/grpc.git
78 lines
2.0 KiB
Go
78 lines
2.0 KiB
Go
package defaulter
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import (
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"context"
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"google.golang.org/grpc"
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"go.linka.cloud/grpc/interceptors"
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)
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type interceptor struct{}
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func NewInterceptors() interceptors.Interceptors {
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return &interceptor{}
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}
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func defaults(v interface{}) {
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if d, ok := v.(interface{ Default() }); v != nil && ok {
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d.Default()
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}
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}
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func (i interceptor) 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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defaults(req)
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return handler(ctx, req)
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}
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}
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func (i interceptor) UnaryClientInterceptor() grpc.UnaryClientInterceptor {
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return func(ctx context.Context, method string, req, reply interface{}, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
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defaults(req)
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return invoker(ctx, method, req, reply, cc, opts...)
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}
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}
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func (i interceptor) StreamServerInterceptor() grpc.StreamServerInterceptor {
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return func(srv interface{}, stream grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
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wrapper := &recvWrapper{ServerStream: stream}
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return handler(srv, wrapper)
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}
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}
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func (i interceptor) StreamClientInterceptor() grpc.StreamClientInterceptor {
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return func(ctx context.Context, desc *grpc.StreamDesc, cc *grpc.ClientConn, method string, streamer grpc.Streamer, opts ...grpc.CallOption) (grpc.ClientStream, error) {
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desc.Handler = (&sendWrapper{handler: desc.Handler}).Handler()
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return streamer(ctx, desc, cc, method)
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}
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}
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type recvWrapper struct {
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grpc.ServerStream
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}
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func (s *recvWrapper) RecvMsg(m interface{}) error {
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if err := s.ServerStream.RecvMsg(m); err != nil {
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return err
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}
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defaults(m)
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return nil
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}
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type sendWrapper struct {
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grpc.ServerStream
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handler grpc.StreamHandler
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}
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func (s *sendWrapper) Handler() grpc.StreamHandler {
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return func(srv interface{}, stream grpc.ServerStream) error {
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return s.handler(srv, s)
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}
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}
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func (s *sendWrapper) SendMsg(m interface{}) error {
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defaults(m)
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return s.ServerStream.SendMsg(m)
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}
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