165 lines
3.4 KiB
Go
165 lines
3.4 KiB
Go
package server
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import (
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"bytes"
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"github.com/micro/go-micro/codec"
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raw "github.com/micro/go-micro/codec/bytes"
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"github.com/micro/go-micro/codec/grpc"
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"github.com/micro/go-micro/codec/json"
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"github.com/micro/go-micro/codec/jsonrpc"
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"github.com/micro/go-micro/codec/proto"
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"github.com/micro/go-micro/codec/protorpc"
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"github.com/micro/go-micro/transport"
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"github.com/pkg/errors"
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)
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type rpcCodec struct {
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socket transport.Socket
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codec codec.Codec
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first bool
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req *transport.Message
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buf *readWriteCloser
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}
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type readWriteCloser struct {
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wbuf *bytes.Buffer
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rbuf *bytes.Buffer
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}
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var (
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DefaultContentType = "application/protobuf"
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DefaultCodecs = map[string]codec.NewCodec{
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"application/grpc": grpc.NewCodec,
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"application/grpc+json": grpc.NewCodec,
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"application/grpc+proto": grpc.NewCodec,
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"application/json": json.NewCodec,
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"application/json-rpc": jsonrpc.NewCodec,
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"application/protobuf": proto.NewCodec,
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"application/proto-rpc": protorpc.NewCodec,
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"application/octet-stream": raw.NewCodec,
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}
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)
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func (rwc *readWriteCloser) Read(p []byte) (n int, err error) {
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return rwc.rbuf.Read(p)
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}
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func (rwc *readWriteCloser) Write(p []byte) (n int, err error) {
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return rwc.wbuf.Write(p)
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}
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func (rwc *readWriteCloser) Close() error {
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rwc.rbuf.Reset()
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rwc.wbuf.Reset()
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return nil
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}
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func newRpcCodec(req *transport.Message, socket transport.Socket, c codec.NewCodec) codec.Codec {
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rwc := &readWriteCloser{
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rbuf: bytes.NewBuffer(req.Body),
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wbuf: bytes.NewBuffer(nil),
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}
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r := &rpcCodec{
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first: true,
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buf: rwc,
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codec: c(rwc),
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req: req,
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socket: socket,
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}
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return r
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}
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func (c *rpcCodec) ReadHeader(r *codec.Message, t codec.MessageType) error {
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m := codec.Message{Header: c.req.Header}
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// if its a follow on request read it
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if !c.first {
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var tm transport.Message
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// read off the socket
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if err := c.socket.Recv(&tm); err != nil {
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return err
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}
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// reset the read buffer
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c.buf.rbuf.Reset()
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// write the body to the buffer
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if _, err := c.buf.rbuf.Write(tm.Body); err != nil {
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return err
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}
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// set the message header
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m.Header = tm.Header
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}
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// no longer first read
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c.first = false
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// set some internal things
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m.Target = m.Header["X-Micro-Service"]
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m.Method = m.Header["X-Micro-Method"]
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m.Id = m.Header["X-Micro-Id"]
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// read header via codec
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err := c.codec.ReadHeader(&m, codec.Request)
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// set the method/id
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r.Method = m.Method
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r.Id = m.Id
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return err
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}
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func (c *rpcCodec) ReadBody(b interface{}) error {
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return c.codec.ReadBody(b)
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}
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func (c *rpcCodec) Write(r *codec.Message, body interface{}) error {
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c.buf.wbuf.Reset()
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// create a new message
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m := &codec.Message{
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Method: r.Method,
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Id: r.Id,
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Error: r.Error,
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Type: r.Type,
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Header: map[string]string{
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"X-Micro-Id": r.Id,
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"X-Micro-Method": r.Method,
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"X-Micro-Error": r.Error,
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"Content-Type": c.req.Header["Content-Type"],
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},
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}
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// write to the body
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if err := c.codec.Write(m, body); err != nil {
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c.buf.wbuf.Reset()
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// write an error if it failed
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m.Error = errors.Wrapf(err, "Unable to encode body").Error()
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m.Header["X-Micro-Error"] = m.Error
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if err := c.codec.Write(m, nil); err != nil {
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return err
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}
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}
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// send on the socket
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return c.socket.Send(&transport.Message{
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Header: m.Header,
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Body: c.buf.wbuf.Bytes(),
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})
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}
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func (c *rpcCodec) Close() error {
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c.buf.Close()
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c.codec.Close()
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return c.socket.Close()
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}
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func (c *rpcCodec) String() string {
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return "rpc"
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}
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