mail2line

main.go

package main

import (
	"fmt"
	"mime"
	"net/http"
	"net/mail"
	"net/url"
	"os"
	"strings"
)

func main() {
	text := ""
	msg, err := mail.ReadMessage(os.Stdin)
	if err != nil {
		panic(err)
	}
	addrs, err := msg.Header.AddressList("From")
	if err != nil {
		panic(err)
	}
	if len(addrs) >= 0 {
		text += addrs[0].Name + " " + addrs[0].Address + " から"
	}
	subject := msg.Header.Get("Subject")
	if subject != "" {
		dec := new(mime.WordDecoder)
		s, err := dec.DecodeHeader(subject)
		if err != nil {
			panic(err)
		}
		text += s + " が届きました"
	}
	v := url.Values{"message": {text}}
	req, err := http.NewRequest(
		"POST",
		"https://notify-api.line.me/api/notify",
		strings.NewReader(v.Encode()),
	)
	if err != nil {
		panic(err)
	}
	req.Header.Set("Authorization", "Bearer "+os.Getenv("TOKEN"))
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	fmt.Println(resp.Status)
}