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package main
// postmap -v 'user' /path/to.socket
import (
"encoding"
"errors"
"fmt"
"io"
"strings"
)
// Postfix request.
type Request struct {
Name string
Key string
}
func (s *Request) UnmarshalText(buf []byte) error {
strs := strings.SplitN(string(buf), " ", 2)
if len(strs) > 0 {
s.Name = strs[0]
}
if len(strs) > 1 {
s.Key = strs[1]
}
if len(strs) > 2 {
return fmt.Errorf("bad format")
}
return nil
}
func (s *Request) String() string {
return fmt.Sprintf("%s %s", s.Name, s.Key)
}
// Value found.
type ReplyOK struct {
Data string
}
func (s *ReplyOK) String() string {
return fmt.Sprintf("OK %s", s.Data)
}
// Value not found.
type ReplyNotFound struct{}
func (s *ReplyNotFound) String() string {
return "NOTFOUND "
}
// Something happened..
type ReplyPerm struct {
Reason string
}
func (s *ReplyPerm) String() string {
return fmt.Sprintf("PERM %s", s.Reason)
}
func readNetString(r io.Reader, v encoding.TextUnmarshaler) (int, error) {
var strLen int
bytesRead, err := fmt.Fscanf(r, "%d:", &strLen)
if err != nil {
return bytesRead, err
}
payload := make([]byte, strLen)
n, err := r.Read(payload)
if err != nil {
return bytesRead, err
}
bytesRead += n
buf := make([]byte, 1)
n, err = r.Read(buf)
bytesRead += n
if err != nil {
return bytesRead, err
}
if buf[0] != ',' {
return bytesRead, errors.New("bad format")
}
err = v.UnmarshalText(payload)
if err != nil {
return bytesRead, err
}
return bytesRead, nil
}
func writeNetString(w io.Writer, v fmt.Stringer) (int, error) {
str := v.String()
resp := fmt.Sprintf("%d:%s,", len(str), str)
return w.Write([]byte(resp))
}
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