35 lines
767 B
Go
35 lines
767 B
Go
|
package lib
|
||
|
|
|
||
|
|
// TODO: Remove this pending merge into github.com/emersion/go-message
|
||
|
|
|
||
|
|
import (
|
||
|
|
"bytes"
|
||
|
|
"encoding/binary"
|
||
|
|
"fmt"
|
||
|
|
"math/rand"
|
||
|
|
"os"
|
||
|
|
"time"
|
||
|
|
|
||
|
|
"github.com/martinlindhe/base36"
|
||
|
|
)
|
||
|
|
|
||
|
|
// Generates an RFC 2822-complaint Message-Id based on the informational draft
|
||
|
|
// "Recommendations for generating Message IDs", for lack of a better
|
||
|
|
// authoritative source.
|
||
|
|
func GenerateMessageId() string {
|
||
|
|
var (
|
||
|
|
now bytes.Buffer
|
||
|
|
nonce bytes.Buffer
|
||
|
|
)
|
||
|
|
binary.Write(&now, binary.BigEndian, time.Now().UnixNano())
|
||
|
|
binary.Write(&nonce, binary.BigEndian, rand.Uint64())
|
||
|
|
hostname, err := os.Hostname()
|
||
|
|
if err != nil {
|
||
|
|
hostname = "localhost"
|
||
|
|
}
|
||
|
|
return fmt.Sprintf("<%s.%s@%s>",
|
||
|
|
base36.EncodeBytes(now.Bytes()),
|
||
|
|
base36.EncodeBytes(nonce.Bytes()),
|
||
|
|
hostname)
|
||
|
|
}
|