Gmail API shows empty body when getting message - go

Question

When I send a request to get the email body, the Gmail API returns everything but the body data on the payload object.
Things I've tried so far
The "Watch" method is already implemented and working fine
As you can see from the screenshot, the response shows the "snipped", which means that the message get is working, but the body data and the "raw" field is still empty.
I am using the history id correctly (saving the current one to use for subsequent requests)
upgrade all the dependencies to the latest stable version
Am I missing anything?
func GetEmail(srv *gmail.Service, historyId uint64) (string, string) {
hist := getHistory(srv, historyId)
for _, h := range hist.History {
for _, m := range h.MessagesAdded {
id := m.Message.Id
mailContent, err := srv.Users.Messages.Get("me", id).Format("full").Do()
if err != nil {
log.Println("error when getting mail content: ", err)
}
if mailContent != nil {
if mailContent.Payload != nil {
payload := mailContent.Payload.Body
data, err := b64.RawURLEncoding.DecodeString(payload.Data)
if err != nil {
log.Println("error b64 decoding: ", err)
}
body := string(data)
if len(body) > 0 {
subject := getSubject(mailContent)
log.Println("subject ", subject)
return body, subject
}
}
}
}
}
return "No email to process, something's wrong - GetEmail func", ""
}

Answer 1

If you want the RAW message data then you need to use Format("RAW")
func GetEmail(srv *gmail.Service, messageId string) {
gmailMessageResposne, err := srv.Users.Messages.Get("me", messageId).Format("RAW").Do()
if err != nil {
log.Println("error when getting mail content: ", err)
}
if gmailMessageResposne != nil {
decodedData, err := base64.RawURLEncoding.DecodeString(gmailMessageResposne.Raw)
if err != nil {
log.Println("error b64 decoding: ", err)
}
fmt.Printf("- %s\n", decodedData)
}
}
Good question that was fun 😁
How to read a gmail email body with Go?