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? ??? ?? Golang Gmail Go SDK? ???? ????? ???? ??? ??: ??? ???

Gmail Go SDK? ???? ????? ???? ??? ??: ??? ???

Oct 28, 2024 am 08:08 AM

How to Send Emails Effectively with the Gmail Go SDK: A Step-by-Step Guide

Gmail Go SDK? ???? ??? ???

Gmail Go SDK? ?? ???? ??? ?? ??? ??? ??? ??? ???? ?? ??? ? ????. ??? ??? ????. ??? ?? ??? ???? ???? ???? ????? ???? ?? ? ????.

<code class="go">import (
    "code.google.com/p/goauth2/oauth"
    "code.google.com/p/google-api-go-client/gmail/v1"
    log "github.com/golang/glog"

    "encoding/base64"
    "encoding/json"
    "net/mail"
    "strings"
    )


type Email struct {
    FromName, FromEmail, ToName, ToEmail, Subject string
    Message                                       string
}

func (em *Email) SendMessage(cl *Client) error {
    config.ClientId = cl.Username //oauth clientID
    config.ClientSecret = cl.Password  //oauth client secret 

    t := &amp;oauth.Transport{
        Config:    config,
        Transport: http.DefaultTransport,
    }
    var tk oauth.Token
    err := json.Unmarshal([]byte(cl.Meta), &amp;tk)
    t.Token = &amp;tk
    if err != nil {
        log.Errorf("meta %v, err %v", cl.Meta, err)
        return err
    }
    gmailService, err := gmail.New(t.Client())
    if err != nil {
        log.Error(err)
        return err
    }

    from := mail.Address{em.FromName, em.FromEmail}
    to := mail.Address{em.ToName, em.ToEmail}

    header := make(map[string]string)
    header["From"] = from.String()
    header["To"] = to.String()
    header["Subject"] = encodeRFC2047(em.Subject)
    header["MIME-Version"] = "1.0"
    header["Content-Type"] = "text/html; charset=\"utf-8\""
    header["Content-Transfer-Encoding"] = "base64"

    var msg string
    for k, v := range header {
        msg += fmt.Sprintf("%s: %s\r\n", k, v)
    }
    msg += "\r\n" + em.Message

    gmsg := gmail.Message{
        Raw: encodeWeb64String([]byte(msg)),
    }

    _, err = gmailService.Users.Messages.Send("me", &amp;gmsg).Do()
    if err != nil {
        log.Errorf("em %v, err %v", gmsg, err)
        return err
    }
    return err
}



func encodeRFC2047(s string) string {
    // use mail's rfc2047 to encode any string
    addr := mail.Address{s, ""}
    return strings.Trim(addr.String(), " <>")
}

func encodeWeb64String(b []byte) string {

    s := base64.URLEncoding.EncodeToString(b)

    var i = len(s) - 1
    for s[i] == '=' {
        i--
    }

    return s[0 : i+1]
}</code>

? ??? ??:

  • ??? MIME ??? ?? net/mail? ???? ??? ??? ?????. .
  • base64? ???? ???? ????? ?? ??? ??? ?? ??? ?????.
  • mail.Address? ???? ?? ?? ? ?? ?? ??? ??? ???? ?????.

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????? GO? ?? ??? ??? ?????? ????? GO? ?? ??? ??? ?????? Jun 19, 2025 am 01:08 AM

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