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smtp.go
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smtp.go
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package server
import (
"encoding/json"
"fmt"
"io/ioutil"
"net/smtp"
"github.com/pkg/errors"
)
// SMTPConfig configures a SMTP client.
type SMTPConfig struct {
Host string `json:"host"`
Port int `json:"port"`
Username string `json:"username"`
Password string `json:"password"`
Sender string `json:"sender"`
}
func smtpConfig(path string) (*SMTPConfig, error) {
config := new(SMTPConfig)
bytes, err := ioutil.ReadFile(path)
if err != nil {
return nil, errors.Wrap(err, "reading smtp config")
}
if err = json.Unmarshal(bytes, config); err != nil {
return nil, errors.Wrapf(err, "unmarshaling smtp config to struct")
}
return config, nil
}
func mail(config *SMTPConfig, email, subject, body string) error {
auth := smtp.PlainAuth("", config.Username, config.Password, config.Host)
to := []string{email}
msg := []byte(fmt.Sprintf("To: %s\r\nSubject: %s\r\n\r\n%s\r\n", email, subject, body))
addr := fmt.Sprintf("%s:%d", config.Host, config.Port)
err := smtp.SendMail(addr, auth, config.Sender, to, msg)
if err != nil {
return errors.Wrapf(err, "sending mail to %q", email)
}
return nil
}