我正在嘗試通過 AWS pinpoint 發送包含附件的電子郵件。要通過電子郵件發送附件，您必須使用“RAW”電子郵件內容。我能找到的唯一檔案在這里：https ://docs.aws.amazon.com/pinpoint-email/latest/APIReference/API_RawMessage.html ，但它缺少很多東西（比如，需要什么標題？）
當我使用“簡單”內容發送電子郵件時，它作業正常：
emailInput := &pinpointemail.SendEmailInput{
Destination: &pinpointemail.Destination{
ToAddresses: []*string{&address},
},
FromEmailAddress: &sender,
Content: &pinpointemail.EmailContent{
Simple: &pinpointemail.Message{
Body: &pinpointemail.Body{
Html: &pinpointemail.Content{
Charset: &charset,
Data: &emailHTML,
},
Text: &pinpointemail.Content{
Charset: &charset,
Data: &emailText,
},
},
Subject: &pinpointemail.Content{
Charset: &charset,
Data: &emailSubject,
},
},
}
由于我想添加附件，我必須使用“RAW”內容型別。我撰寫了一個生成電子郵件內容的函式，基于：https ://gist.github.com/douglasmakey/90753ecf37ac10c25873825097f46300 ：
func generateRawEmailContent(subject, to, from, HTMLBody string, attachments *[]EmailAttachment) []byte {
buf := bytes.NewBuffer(nil)
buf.WriteString(fmt.Sprintf("Subject: %s\n", subject))
buf.WriteString(fmt.Sprintf("To: %s\n", to))
buf.WriteString(fmt.Sprintf("From: %s\n\n", from))
buf.WriteString("MIME-version: 1.0;\nContent-Type: text/html; charset=\"UTF-8\";\n\n")
buf.WriteString(HTMLBody)
writer := multipart.NewWriter(buf)
boundary := writer.Boundary()
buf.WriteString(fmt.Sprintf("Content-Type: multipart/mixed; boundary=%s\n", boundary))
buf.WriteString(fmt.Sprintf("--%s\n", boundary))
for _, attachment := range *attachments {
buf.WriteString(fmt.Sprintf("\n\n--%s\n", boundary))
buf.WriteString(fmt.Sprintf("Content-Type: %s\n", http.DetectContentType(attachment.Data)))
buf.WriteString("Content-Transfer-Encoding: base64\n")
buf.WriteString(fmt.Sprintf("Content-Disposition: attachment; filename=%s\n", attachment.FileName))
b := make([]byte, base64.StdEncoding.EncodedLen(len(attachment.Data)))
base64.StdEncoding.Encode(b, attachment.Data)
buf.Write(b)
buf.WriteString(fmt.Sprintf("\n--%s", boundary))
}
buf.WriteString("--")
log.Println(string(buf.Bytes()))
return buf.Bytes()
}
這會生成以下內容（電子郵件已更改）：
Subject: Welcome \nTo: [email protected]\nFrom: [email protected]\n\nMIME-version: 1.0;\nContent-Type: text/html; charset=\"UTF-8\";\n\n\u003ch1\u003eHello ,\u003c/h1\u003e\u003cp\u003eYou now have an account.\u003c/p\u003e\nContent-Type: multipart/mixed; boundary=8f6b2cc498b79f5a99550b930ba1ecab1fc1ee2d3425a0a69ab67b83b647\n--8f6b2cc498b79f5a99550b930ba1ecab1fc1ee2d3425a0a69ab67b83b647\n\n\n--8f6b2cc498b79f5a99550b930ba1ecab1fc1ee2d3425a0a69ab67b83b647\nContent-Type: text/plain; charset=utf-8\nContent-Transfer-Encoding: base64\nContent-Disposition: attachment; filename=test.json\newogICJ0ZXN0IjogdHJ1ZQp9\n--8f6b2cc498b79f5a99550b930ba1ecab1fc1ee2d3425a0a69ab67b83b647--
然后我按如下方式構建電子郵件：
&pinpointemail.SendEmailInput{
Destination: &pinpointemail.Destination{
ToAddresses: []*string{&address},
},
FromEmailAddress: &sender,
Content: &pinpointemail.EmailContent{
Raw: &pinpointemail.RawMessage{
Data: generateRawEmailContent(emailSubject, address, sender, emailHTML, emailAttachments),
},
}
通過github.com/aws/aws-sdk-go/service/pinpoint包裹發送這封電子郵件時，我收到了 403 回復，我不知道為什么。403 表示我試圖訪問的資源被禁止，但我不明白這與這里有什么關系？此外，沒有關于 403 甚至可能的回應的檔案。任何幫助將不勝感激！
我也嘗試過使用庫，例如?? gomail-v2 庫，如下所示：
m := gomail.NewMessage()
m.SetHeader("From", from)
m.SetHeader("To", to)
m.SetHeader("Subject", subject)
m.SetBody("text/plain", textBody)
m.AddAlternative("text/html", HTMLBody)
m.Attach("foo.txt", gomail.SetCopyFunc(func(w io.Writer) error {
_, err := w.Write((*attachments)[0].Data)
return err
}))
buf := bytes.NewBuffer(make([]byte, 0, 2048))
_, werr := m.WriteTo(buf)
if werr != nil {
return nil, common.NewStackError(werr)
}
但這仍然給我一個 403 錯誤。
uj5u.com熱心網友回復：
我不是 Go 人，所以這只是一次粗暴地嘗試改組代碼行以希望產生一個有效的 MIME 結構。
func generateRawEmailContent(subject, to, from, HTMLBody string, attachments *[]EmailAttachment) []byte {
buf := bytes.NewBuffer(nil)
// Creating headers by gluing together strings is precarious.
// I'm sure there must be a better way.
buf.WriteString(fmt.Sprintf("Subject: %s\n", subject))
buf.WriteString(fmt.Sprintf("To: %s\n", to))
// Remove spurious newline
buf.WriteString(fmt.Sprintf("From: %s\n", from))
writer := multipart.NewWriter(buf)
boundary := writer.Boundary()
buf.WriteString(fmt.Sprintf("MIME-Version: 1.0\n", boundary))
buf.WriteString(fmt.Sprintf("Content-Type: multipart/mixed; boundary=%s\n", boundary))
// End of headers
buf.WriteString("\n")
buf.WriteString(fmt.Sprintf("--%s\n", boundary))
buf.WriteString("Content-Type: text/html; charset=\"UTF-8\";\n\n")
buf.WriteString(HTMLBody)
for _, attachment := range *attachments {
buf.WriteString(fmt.Sprintf("\n\n--%s\n", boundary))
buf.WriteString(fmt.Sprintf("Content-Type: %s\n", http.DetectContentType(attachment.Data)))
buf.WriteString("Content-Transfer-Encoding: base64\n")
buf.WriteString(fmt.Sprintf("Content-Disposition: attachment; filename=%s\n", attachment.FileName))
b := make([]byte, base64.StdEncoding.EncodedLen(len(attachment.Data)))
base64.StdEncoding.Encode(b, attachment.Data)
buf.Write(b)
// Don't add a second boundary here
buf.WriteString("\n")
}
// Final terminating boundary, notice -- after
buf.WriteString(fmt.Sprintf("\n--%s--\n", boundary))
log.Println(string(buf.Bytes()))
return buf.Bytes()
}
結果輸出應該類似于
Subject: subject
To: recipient <[email protected]>
From: me <[email protected]>
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary=foobar
--foobar
Content-Type: text/html; charset="UTF-8"
<h1>Tremble, victim</h1>
<p>We don't send <tt>text/plain</tt> because we
hate our users.</p>
--foobar
Content-Type: application/octet-stream
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename=skull_crossbones.jpg
YmluYXJ5ZGF0YQ==
--foobar--
uj5u.com熱心網友回復：
好的，找到問題了。事實證明，這個 403 錯誤與我的代碼無關，而是與 AWS 中的 IAM 權限有關。顯然，必須打開 IAM 權限才能啟用 RAW 電子郵件內容。
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標籤：亚马逊网络服务 去 电子邮件 哑剧 aws-pinpoint