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substitutions-with-mailer-helper.md

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Substitutions - With Mail Helper Class

package main
 
import (
   "fmt"
   "log"
   "os"
 
   "github.com/sendgrid/sendgrid-go"
   "github.com/sendgrid/sendgrid-go/helpers/mail"
)
 
func main() {
  from := mail.NewEmail("Example User", "[email protected]")
  subject := "Substitutions can be fun"
  to := mail.NewEmail("Example User", "[email protected]")
  content := mail.NewContent("text/html", "<html>\n<head>\n\t<title></title>\n</head>\n<body>\nHello -name-,\n<br /><br/>\nI'm glad you are trying out the Substitutions feature!\n<br /><br/>\nI hope you are having a great day in -city- :)\n<br /><br/>\n</body>\n</html>")
  m := mail.NewV3MailInit(from, subject, to, content)
  m.Personalizations[0].SetSubstitution("-name-", "Example User")
  m.Personalizations[0].SetSubstitution("-city-", "Denver")
  m.Personalizations[0].SetSubstitution("-user_id-", "343")
  m.Personalizations[0].SetCustomArg("user_id", "-user_id-")
  m.Personalizations[0].SetCustomArg("city", "-city-")
 
  request := sendgrid.GetRequest(os.Getenv("SENDGRID_API_KEY"), "/v3/mail/send", "https://api.sendgrid.com")
  request.Method = "POST"
  request.Body = mail.GetRequestBody(m)
  response, err := sendgrid.API(request)
  if err != nil {
    log.Println(err)
  } else {
    fmt.Println(response.StatusCode)
    fmt.Println(response.Body)
    fmt.Println(response.Headers)
  }
}