conn.go
1.16 KB
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package msg
import (
"encoding/binary"
"errors"
"fmt"
"ngrok/conn"
)
func readMsgShared(c conn.Conn) (buffer []byte, err error) {
c.Debug("Waiting to read message")
var sz int64
err = binary.Read(c, binary.LittleEndian, &sz)
if err != nil {
return
}
c.Debug("Reading message with length: %d", sz)
buffer = make([]byte, sz)
n, err := c.Read(buffer)
c.Debug("Read message %s", buffer)
if err != nil {
return
}
if int64(n) != sz {
err = errors.New(fmt.Sprintf("Expected to read %d bytes, but only read %d", sz, n))
return
}
return
}
func ReadMsg(c conn.Conn) (msg Message, err error) {
buffer, err := readMsgShared(c)
if err != nil {
return
}
return Unpack(buffer)
}
func ReadMsgInto(c conn.Conn, msg Message) (err error) {
buffer, err := readMsgShared(c)
if err != nil {
return
}
return UnpackInto(buffer, msg)
}
func WriteMsg(c conn.Conn, msg interface{}) (err error) {
buffer, err := Pack(msg)
if err != nil {
return
}
c.Debug("Writing message: %s", string(buffer))
err = binary.Write(c, binary.LittleEndian, int64(len(buffer)))
if err != nil {
return
}
if _, err = c.Write(buffer); err != nil {
return
}
return nil
}