app-cloudep-notification-se.../internal/usecase/smtp.go

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package usecase
import (
"app-cloudep-notification-service/internal/config"
"app-cloudep-notification-service/internal/domain/usecase"
pool "code.30cm.net/digimon/library-go/worker_pool"
"github.com/zeromicro/go-zero/core/logx"
"context"
"gopkg.in/gomail.v2"
)
type MailUseCaseParam struct {
Conf config.Config
}
type MailUseCase struct {
Host string
Port int
User string
Password string
Pool pool.WorkerPool
}
func (mu *MailUseCase) SendMail(_ context.Context, req usecase.MailReq) error {
// 用 goroutine pool 送,否則會超時
err := mu.Pool.Submit(func() {
m := gomail.NewMessage()
m.SetHeader("From", req.From)
m.SetHeader("To", req.To)
m.SetHeader("Subject", req.Subject)
m.SetBody("text/html", req.Body)
d := gomail.NewDialer(mu.Host, mu.Port, mu.User, mu.Password)
if err := d.DialAndSend(m); err != nil {
logx.WithCallerSkip(1).WithFields(
logx.Field("func", "MailUseCase.SendMail"),
logx.Field("req", req),
logx.Field("err", err),
).Error("failed to send mail by mailgun")
}
})
return err
}
func MustMailgunUseCase(param MailUseCaseParam) usecase.MailClientUseCase {
return &MailUseCase{
Host: param.Conf.SMTP.Host,
Port: param.Conf.SMTP.Port,
User: param.Conf.SMTP.User,
Password: param.Conf.SMTP.Password,
Pool: pool.NewWorkerPool(2000),
}
}