85 lines
1.7 KiB
Go
85 lines
1.7 KiB
Go
package grpc
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import (
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"io"
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"github.com/unistack-org/micro/v3/codec"
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"google.golang.org/grpc"
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"google.golang.org/grpc/encoding"
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)
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type wrapStream struct{ grpc.ServerStream }
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func (w *wrapStream) Write(d []byte) (int, error) {
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n := len(d)
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err := w.ServerStream.SendMsg(&codec.Frame{Data: d})
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return n, err
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}
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func (w *wrapStream) Read(d []byte) (int, error) {
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m := &codec.Frame{}
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err := w.ServerStream.RecvMsg(m)
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d = m.Data
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return len(d), err
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}
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type wrapMicroCodec struct{ codec.Codec }
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func (w *wrapMicroCodec) Name() string {
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return w.Codec.String()
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}
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type wrapGrpcCodec struct{ encoding.Codec }
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func (w *wrapGrpcCodec) String() string {
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return w.Codec.Name()
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}
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func (w *wrapGrpcCodec) Marshal(v interface{}) ([]byte, error) {
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switch m := v.(type) {
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case *codec.Frame:
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return m.Data, nil
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}
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return w.Codec.Marshal(v)
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}
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func (w wrapGrpcCodec) Unmarshal(d []byte, v interface{}) error {
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if d == nil || v == nil {
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return nil
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}
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switch m := v.(type) {
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case *codec.Frame:
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m.Data = d
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return nil
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}
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return w.Codec.Unmarshal(d, v)
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}
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func (g *wrapGrpcCodec) ReadHeader(conn io.Reader, m *codec.Message, mt codec.MessageType) error {
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return nil
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}
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func (g *wrapGrpcCodec) ReadBody(conn io.Reader, v interface{}) error {
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// caller has requested a frame
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switch m := v.(type) {
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case *codec.Frame:
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_, err := conn.Read(m.Data)
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return err
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}
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return codec.ErrInvalidMessage
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}
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func (g *wrapGrpcCodec) Write(conn io.Writer, m *codec.Message, v interface{}) error {
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// if we don't have a body
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if v != nil {
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b, err := g.Marshal(v)
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if err != nil {
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return err
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}
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m.Body = b
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}
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// write the body using the framing codec
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_, err := conn.Write(m.Body)
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return err
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}
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