main.go

package main

import (
	"errors"
	"fmt"
	"log"
	"time"

	"github.com/alash3al/go-smtpsrv"
	"github.com/go-resty/resty/v2"
)

func main() {
	cfg := smtpsrv.ServerConfig{
		ReadTimeout:     time.Duration(*flagReadTimeout) * time.Second,
		WriteTimeout:    time.Duration(*flagWriteTimeout) * time.Second,
		ListenAddr:      *flagListenAddr,
		MaxMessageBytes: int(*flagMaxMessageSize),
		BannerDomain:    *flagServerName,
		Handler: smtpsrv.HandlerFunc(func(c *smtpsrv.Context) error {
			msg, err := c.Parse()
			if err != nil {
				return errors.New("Cannot read your message: " + err.Error())
			}

			jsonDiscord := DiscordJson{
				AvatarURL: *flagAvatarURL,
				Username:  *flagAuthor,
				Content:   msg.TextBody,
			}

			resp, err := resty.New().R().SetHeader("Content-Type", "application/json").SetBody(jsonDiscord).Post(*flagWebhook)
			fmt.Println(resp.StatusCode())
			if err != nil {
				log.Println(err)
				return errors.New("E1: Cannot accept your message due to internal error, please report that to our engineers")
			} else if resp.StatusCode() != 204 {
				log.Println(resp.Status())
				return errors.New("E2: Cannot accept your message due to internal error, please report that to our engineers")
			}

			return nil
		}),
	}

	fmt.Println(smtpsrv.ListenAndServe(&cfg))
}