/
conn.go
104 lines (83 loc) · 1.67 KB
/
conn.go
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package goa
import (
"bufio"
"encoding/binary"
"io"
"net"
)
type conn struct {
c net.Conn
buf *bufio.ReadWriter
}
func newConn(c net.Conn) *conn {
return &conn{
c,
bufio.NewReadWriter(bufio.NewReader(c), bufio.NewWriter(c)),
}
}
func (conn *conn) sendOne(req *Request) error {
if err := conn.send(req); err != nil {
return err
}
return conn.buf.Flush()
}
func (conn *conn) sendBatch(reqs []*Request) error {
for _, r := range reqs {
if err := conn.send(r); err != nil {
return err
}
}
return conn.buf.Flush()
}
func (conn *conn) send(req *Request) error {
if err := conn.writeHeader(req); err != nil {
return err
}
if _, err := conn.buf.Write(req.payld); err != nil {
return err
}
return nil
}
func (conn *conn) recv() ([]byte, uint64, error) {
seq, size, err := conn.readHeader()
if err != nil {
return nil, 0, err
}
payld := make([]byte, size)
_, err = io.ReadFull(conn.buf, payld)
if err != nil {
return nil, 0, err
}
return payld, seq, nil
}
func (conn *conn) close() error {
if err := conn.buf.Flush(); err != nil {
return err
}
return conn.c.Close()
}
func (conn *conn) writeHeader(req *Request) error {
buf := make([]byte, binary.MaxVarintLen64)
n := binary.PutUvarint(buf, req.seq)
_, err := conn.buf.Write(buf[:n])
if err != nil {
return err
}
n = binary.PutUvarint(buf, uint64(len(req.payld)))
_, err = conn.buf.Write(buf[:n])
if err != nil {
return err
}
return nil
}
func (conn *conn) readHeader() (uint64, uint64, error) {
seq, err := binary.ReadUvarint(conn.buf)
if err != nil {
return 0, 0, err
}
size, err := binary.ReadUvarint(conn.buf)
if err != nil {
return 0, 0, err
}
return seq, size, nil
}