go.enmime library example

gistfile1.go

package main

import (
	"bytes"
	"fmt"
	"log"
	"net/mail"

	enmime "github.com/jhillyerd/go.enmime"
)

const myMessage = `Content-Type: multipart/alternative;
 boundary="===============5769616449556512256=="
MIME-Version: 1.0
To: test@test.com
From: test@gmail.com
Cc: 
Subject: =?utf-8?b?0J/RgNC40LLQtdGC?=
Date: Mon, 30 Jun 2014 18:29:38 -0000

--===============5769616449556512256==
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: base64

0K3RgtC+INC80L7RkSDRgdC+0L7QsdGJ0LXQvdC40LUu

--===============5769616449556512256==
Content-Type: text/html; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: base64

0K3RgtC+INC80L7RkSDRgdC+0L7QsdGJ0LXQvdC40LUu

--===============5769616449556512256==--`

func main() {
	msg, err := mail.ReadMessage(bytes.NewBufferString(myMessage))
	if err != nil {
		log.Fatal("Cannot parse myMessage.")
	}
	mime, _ := enmime.ParseMIMEBody(msg)
	fmt.Printf("Subject: %s\n", mime.GetHeader("Subject"))
	fmt.Printf("Body:\n%s\n", mime.Html)
}

Prints the expected result:

Subject: Привет
Body:
Это моё сообщение.