Golang AWS SES xlsx 附件已损坏
Golang AWS SES xlsx attachment corrupted
在 golang 中,我正在尝试发送一封附有 XLSX 文件的电子邮件。
我使用 github.com/tealeg/xlsx/v3
将 XLSX 文件生成为字节数组,并且在与这样的 Web 服务器(此处为 gin)一起使用时运行良好:
c.Header("Content-Description", "File Transfer")
c.Header("Content-Type", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet")
c.Header("Content-Disposition", "attachment; filename="+time.Now().UTC().Format("daily-alerts-20060102.xlsx"))
c.Data(http.StatusOK, "application/octet-stream", fileContent)
但是,当使用 SES 发送时,虽然 CSV 文件被正确提供,但 6ko XLSX 文件变成了 10ko XLSX 文件,并且无法使用 Excel:
打开它
func (s *EmailSenderParams) SendEmailWithAttachment(content string, data *models.RawEmailData, attachment []byte, attachmentFilename string) error {
sess, err := session.NewSession(&aws.Config{
Region: aws.String(s.awsRegion)},
)
creds := credentials.NewStaticCredentials(s.apiID, s.apiKey, "")
// Create an SES session.
svc := ses.New(sess, &aws.Config{Credentials: creds})
// Assemble the email.
buf := new(bytes.Buffer)
writer := multipart.NewWriter(buf)
// email main header:
h := make(textproto.MIMEHeader)
//h.Set("From", source)
h.Set("To", data.ReceiverMail)
//h.Set("Return-Path", source)
h.Set("Subject", data.Subject)
h.Set("Content-Language", "en-US")
h.Set("Content-Type", "multipart/mixed; boundary=\""+writer.Boundary()+"\"")
h.Set("MIME-Version", "1.0")
_, err = writer.CreatePart(h)
if err != nil {
return err
}
// body:
h = make(textproto.MIMEHeader)
h.Set("Content-Transfer-Encoding", "7bit")
h.Set("Content-Type", "text/plain; charset=us-ascii")
part, err := writer.CreatePart(h)
if err != nil {
return err
}
_, err = part.Write([]byte(content))
if err != nil {
return err
}
// file attachment:
h = make(textproto.MIMEHeader)
h.Set("Content-Disposition", "attachment; filename="+attachmentFilename)
h.Set("Content-Type", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet; x-unix-mode=0644; name=\""+attachmentFilename+"\"")
h.Set("Content-Transfer-Encoding", "7bit")
part, err = writer.CreatePart(h)
if err != nil {
return err
}
_, err = part.Write(attachment)
if err != nil {
return err
}
err = writer.Close()
if err != nil {
return err
}
// Strip boundary line before header (doesn't work with it present)
st := buf.String()
if strings.Count(st, "\n") < 2 {
return fmt.Errorf("invalid e-mail content")
}
st = strings.SplitN(st, "\n", 2)[1]
raw := ses.RawMessage{
Data: []byte(st),
}
input := &ses.SendRawEmailInput{
Destinations: []*string{aws.String(data.ReceiverMail)},
Source: aws.String(s.senderEmail),
RawMessage: &raw,
}
// Attempt to send the email.
_, err = svc.SendRawEmail(input)
// Display error messages if they occur.
if err != nil {
if aerr, ok := err.(awserr.Error); ok {
switch aerr.Code() {
case ses.ErrCodeMessageRejected:
logrus.Warnln(ses.ErrCodeMessageRejected, aerr.Error())
case ses.ErrCodeMailFromDomainNotVerifiedException:
logrus.Warnln(ses.ErrCodeMailFromDomainNotVerifiedException, aerr.Error())
case ses.ErrCodeConfigurationSetDoesNotExistException:
logrus.Warnln(ses.ErrCodeConfigurationSetDoesNotExistException, aerr.Error())
default:
logrus.Warnln(aerr.Error())
}
} else {
logrus.Warnln(err.Error())
}
logrus.Warnln(err)
return err
}
logrus.Infoln("SES Email Sent to " + data.ReceiverName + " at address: " + data.ReceiverMail)
return nil
}
我认为 MIMEHeaders、多部分或编码可能有问题,但我正在努力寻找问题所在。
您知道发送带有 AWS SES 附加 XLSX 文件的电子邮件的任何成功方法吗?
解决方案是对文件进行base64编码,并将Content-Transfer-Encoding
header设置为base64
h.Set("Content-Transfer-Encoding", "base64")
part, err = writer.CreatePart(h)
if err != nil {
return err
}
b := make([]byte, base64.StdEncoding.EncodedLen(len(attachment)))
base64.StdEncoding.Encode(b, attachment)
_, err = part.Write(b)
在 golang 中,我正在尝试发送一封附有 XLSX 文件的电子邮件。
我使用 github.com/tealeg/xlsx/v3
将 XLSX 文件生成为字节数组,并且在与这样的 Web 服务器(此处为 gin)一起使用时运行良好:
c.Header("Content-Description", "File Transfer")
c.Header("Content-Type", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet")
c.Header("Content-Disposition", "attachment; filename="+time.Now().UTC().Format("daily-alerts-20060102.xlsx"))
c.Data(http.StatusOK, "application/octet-stream", fileContent)
但是,当使用 SES 发送时,虽然 CSV 文件被正确提供,但 6ko XLSX 文件变成了 10ko XLSX 文件,并且无法使用 Excel:
打开它func (s *EmailSenderParams) SendEmailWithAttachment(content string, data *models.RawEmailData, attachment []byte, attachmentFilename string) error {
sess, err := session.NewSession(&aws.Config{
Region: aws.String(s.awsRegion)},
)
creds := credentials.NewStaticCredentials(s.apiID, s.apiKey, "")
// Create an SES session.
svc := ses.New(sess, &aws.Config{Credentials: creds})
// Assemble the email.
buf := new(bytes.Buffer)
writer := multipart.NewWriter(buf)
// email main header:
h := make(textproto.MIMEHeader)
//h.Set("From", source)
h.Set("To", data.ReceiverMail)
//h.Set("Return-Path", source)
h.Set("Subject", data.Subject)
h.Set("Content-Language", "en-US")
h.Set("Content-Type", "multipart/mixed; boundary=\""+writer.Boundary()+"\"")
h.Set("MIME-Version", "1.0")
_, err = writer.CreatePart(h)
if err != nil {
return err
}
// body:
h = make(textproto.MIMEHeader)
h.Set("Content-Transfer-Encoding", "7bit")
h.Set("Content-Type", "text/plain; charset=us-ascii")
part, err := writer.CreatePart(h)
if err != nil {
return err
}
_, err = part.Write([]byte(content))
if err != nil {
return err
}
// file attachment:
h = make(textproto.MIMEHeader)
h.Set("Content-Disposition", "attachment; filename="+attachmentFilename)
h.Set("Content-Type", "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet; x-unix-mode=0644; name=\""+attachmentFilename+"\"")
h.Set("Content-Transfer-Encoding", "7bit")
part, err = writer.CreatePart(h)
if err != nil {
return err
}
_, err = part.Write(attachment)
if err != nil {
return err
}
err = writer.Close()
if err != nil {
return err
}
// Strip boundary line before header (doesn't work with it present)
st := buf.String()
if strings.Count(st, "\n") < 2 {
return fmt.Errorf("invalid e-mail content")
}
st = strings.SplitN(st, "\n", 2)[1]
raw := ses.RawMessage{
Data: []byte(st),
}
input := &ses.SendRawEmailInput{
Destinations: []*string{aws.String(data.ReceiverMail)},
Source: aws.String(s.senderEmail),
RawMessage: &raw,
}
// Attempt to send the email.
_, err = svc.SendRawEmail(input)
// Display error messages if they occur.
if err != nil {
if aerr, ok := err.(awserr.Error); ok {
switch aerr.Code() {
case ses.ErrCodeMessageRejected:
logrus.Warnln(ses.ErrCodeMessageRejected, aerr.Error())
case ses.ErrCodeMailFromDomainNotVerifiedException:
logrus.Warnln(ses.ErrCodeMailFromDomainNotVerifiedException, aerr.Error())
case ses.ErrCodeConfigurationSetDoesNotExistException:
logrus.Warnln(ses.ErrCodeConfigurationSetDoesNotExistException, aerr.Error())
default:
logrus.Warnln(aerr.Error())
}
} else {
logrus.Warnln(err.Error())
}
logrus.Warnln(err)
return err
}
logrus.Infoln("SES Email Sent to " + data.ReceiverName + " at address: " + data.ReceiverMail)
return nil
}
我认为 MIMEHeaders、多部分或编码可能有问题,但我正在努力寻找问题所在。 您知道发送带有 AWS SES 附加 XLSX 文件的电子邮件的任何成功方法吗?
解决方案是对文件进行base64编码,并将Content-Transfer-Encoding
header设置为base64
h.Set("Content-Transfer-Encoding", "base64")
part, err = writer.CreatePart(h)
if err != nil {
return err
}
b := make([]byte, base64.StdEncoding.EncodedLen(len(attachment)))
base64.StdEncoding.Encode(b, attachment)
_, err = part.Write(b)