codec

package
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Published: Jan 6, 2013 License: BSD-3-Clause Imports: 8 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func ReadProto

func ReadProto(r ProtoReader, pb proto.Message) error

ReadProto reads a uvarint size and then a protobuf from r. If the size read is zero, nothing more is read.

func WriteProto

func WriteProto(w io.Writer, pb proto.Message) error

WriteProto writes a uvarint size and then a protobuf to w. If the data takes no space (like rpc.InvalidRequest), only a zero size is written.

Types

type ClientCodec

type ClientCodec struct {
	// contains filtered or unexported fields
}

ClientCodec implements the rpc.ClientCodec interface for generic protobufs. The same implementation works for all protobufs because it defers the encoding of a protocol buffer to the proto package and it uses a set header that is the same regardless of the protobuf being used for the RPC.

func NewClientCodec

func NewClientCodec(conn net.Conn) *ClientCodec

NewClientCodec returns a ClientCodec for communicating with the ServerCodec on the other end of the conn.

func (*ClientCodec) Close

func (c *ClientCodec) Close() error

Close closes the underlying connection.

func (*ClientCodec) ReadResponseBody

func (c *ClientCodec) ReadResponseBody(obj interface{}) error

ReadResponseBody reads a uvarint from the connection and decodes that many subsequent bytes into the given protobuf (which should be a pointer to a struct that is generated by the proto package). If the uvarint size read is zero, nothing is done (this indicates an error condition, which was encapsulated in the header)

func (*ClientCodec) ReadResponseHeader

func (c *ClientCodec) ReadResponseHeader(resp *rpc.Response) error

ReadResponseHeader reads the header protobuf (which is prefixed by a uvarint indicating its size) from the connection, decodes it, and stores the fields in the given request.

func (*ClientCodec) WriteRequest

func (c *ClientCodec) WriteRequest(req *rpc.Request, obj interface{}) error

WriteRequest writes the appropriate header protobuf and the given protobuf to the connection (each prefixed with a uvarint indicating its size).

type ProtoReader

type ProtoReader interface {
	io.Reader
	io.ByteReader
}

type ServerCodec

type ServerCodec struct {
	// contains filtered or unexported fields
}

ServerCodec implements the rpc.ServerCodec interface for generic protobufs. The same implementation works for all protobufs because it defers the decoding of a protocol buffer to the proto package and it uses a set header that is the same regardless of the protobuf being used for the RPC.

func NewServerCodec

func NewServerCodec(conn net.Conn) *ServerCodec

NewServerCodec returns a ServerCodec that communicates with the ClientCodec on the other end of the given conn.

func (*ServerCodec) Close

func (s *ServerCodec) Close() error

Close closes the underlying conneciton.

func (*ServerCodec) ReadRequestBody

func (s *ServerCodec) ReadRequestBody(obj interface{}) error

ReadRequestBody reads a uvarint from the connection and decodes that many subsequent bytes into the given protobuf (which should be a pointer to a struct that is generated by the proto package).

func (*ServerCodec) ReadRequestHeader

func (s *ServerCodec) ReadRequestHeader(req *rpc.Request) error

ReadRequestHeader reads the header protobuf (which is prefixed by a uvarint indicating its size) from the connection, decodes it, and stores the fields in the given request.

func (*ServerCodec) WriteResponse

func (s *ServerCodec) WriteResponse(resp *rpc.Response, obj interface{}) error

WriteResponse writes the appropriate header protobuf and the given protobuf to the connection (each prefixed with a uvarint indicating its size). If the response was invalid, the size of the body of the resp is reported as having size zero and is not sent.

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