google mail API [[FIN]]
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@@ -1,127 +1,69 @@
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package googleapi
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import (
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"bytes"
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"context"
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"encoding/base64"
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"encoding/json"
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"fmt"
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"gogs.mikescher.com/BlackForestBytes/goext"
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"gogs.mikescher.com/BlackForestBytes/goext/exerr"
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"gogs.mikescher.com/BlackForestBytes/goext/langext"
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"mime"
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"strings"
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"time"
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"io"
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"net/http"
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)
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func (c *client) SendMail(from string, recipients []string, cc []string, bcc []string, subject string, body MailBody, attachments []MailAttachment) error {
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data := make([]string, 0, 32)
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data = append(data, "Date: "+time.Now().Format(time.RFC1123Z))
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data = append(data, "From: "+mime.QEncoding.Encode("UTF-8", from))
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data = append(data, "To: "+strings.Join(langext.ArrMap(recipients, func(v string) string { return mime.QEncoding.Encode("UTF-8", v) }), ", "))
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if len(cc) > 0 {
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data = append(data, "To: "+strings.Join(langext.ArrMap(cc, func(v string) string { return mime.QEncoding.Encode("UTF-8", v) }), ", "))
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}
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if len(bcc) > 0 {
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data = append(data, "Bcc: "+strings.Join(langext.ArrMap(bcc, func(v string) string { return mime.QEncoding.Encode("UTF-8", v) }), ", "))
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}
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data = append(data, "Subject: "+mime.QEncoding.Encode("UTF-8", subject))
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hasAttachments := len(attachments) > 0
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hasInlineAttachments := langext.ArrAny(attachments, func(v MailAttachment) bool { return v.IsInline })
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hasPlain := body.Plain != nil
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hasHTML := body.HTML != nil
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mixedBoundary := "--------------" + langext.MustRawHexUUID()
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relatedBoundary := "--------------" + langext.MustRawHexUUID()
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altBoundary := "--------------" + langext.MustRawHexUUID()
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inlineAttachments := langext.ArrFilter(attachments, func(v MailAttachment) bool { return v.IsInline })
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normalAttachments := langext.ArrFilter(attachments, func(v MailAttachment) bool { return !v.IsInline })
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if hasInlineAttachments {
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// "mixed+related"
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data = append(data, "Content-Type: multipart/mixed; boundary="+mixedBoundary)
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data = append(data, "")
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data = append(data, mixedBoundary)
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data = append(data, "Content-Type: multipart/related; boundary="+relatedBoundary)
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data = append(data, "")
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data = append(data, c.dumpHTMLBody(body, hasInlineAttachments, hasAttachments, relatedBoundary, altBoundary)...)
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data = append(data, "")
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for i, attachment := range inlineAttachments {
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data = append(data, relatedBoundary)
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data = append(data, attachment.dump()...)
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if i < len(inlineAttachments)-1 {
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data = append(data, "")
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}
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}
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data = append(data, relatedBoundary)
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for i, attachment := range normalAttachments {
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data = append(data, mixedBoundary)
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data = append(data, attachment.dump()...)
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if i < len(inlineAttachments)-1 {
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data = append(data, "")
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}
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}
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data = append(data, mixedBoundary)
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} else if hasAttachments {
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// "mixed"
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//TODO https://github.dev/muratgozel/MIMEText/blob/master/src/MIMEMessage.ts
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} else if hasPlain && hasHTML {
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// "alternative"
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//TODO https://github.dev/muratgozel/MIMEText/blob/master/src/MIMEMessage.ts
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} else {
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// "plain"
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//TODO https://github.dev/muratgozel/MIMEText/blob/master/src/MIMEMessage.ts
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}
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type MailRef struct {
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ID string `json:"id"`
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ThreadID string `json:"threadId"`
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LabelIDs []string `json:"labelIds"`
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}
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func (c *client) dumpHTMLBody(body MailBody, hasInlineAttachments bool, hasAttachments bool, boundary string, boundaryAlt string) []string {
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func (c *client) SendMail(ctx context.Context, from string, recipients []string, cc []string, bcc []string, subject string, body MailBody, attachments []MailAttachment) (MailRef, error) {
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data := make([]string, 0, 16)
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mm := encodeMimeMail(from, recipients, cc, bcc, subject, body, attachments)
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if body.HTML != nil && body.Plain != nil && hasInlineAttachments {
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data = append(data, boundary)
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data = append(data, *body.HTML)
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} else if body.HTML != nil && body.Plain != nil && hasAttachments {
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data = append(data, boundary)
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data = append(data, "Content-Type: multipart/alternative; boundary="+boundaryAlt)
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data = append(data, "")
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data = append(data, boundaryAlt)
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data = append(data, *body.Plain)
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data = append(data, "")
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data = append(data, boundaryAlt)
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data = append(data, *body.HTML)
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data = append(data, "")
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data = append(data, boundaryAlt)
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} else if body.HTML != nil && body.Plain != nil {
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data = append(data, boundary)
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data = append(data, *body.Plain)
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data = append(data, "")
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data = append(data, boundary)
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data = append(data, *body.HTML)
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} else if body.HTML != nil {
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data = append(data, boundary)
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data = append(data, *body.HTML)
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} else if body.Plain != nil {
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data = append(data, boundary)
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data = append(data, *body.Plain)
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} else {
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data = append(data, boundary)
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data = append(data, "") // no content ?!?
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tok, err := c.oauth.AccessToken()
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if err != nil {
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return MailRef{}, exerr.Wrap(err, "").Build()
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}
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return data
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url := fmt.Sprintf("https://gmail.googleapis.com/gmail/v1/users/%s/messages/send?alt=json&prettyPrint=false", "me")
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msgbody, err := json.Marshal(langext.H{"raw": base64.URLEncoding.EncodeToString([]byte(mm))})
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if err != nil {
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return MailRef{}, exerr.Wrap(err, "").Build()
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}
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req, err := http.NewRequestWithContext(ctx, http.MethodPost, url, bytes.NewReader(msgbody))
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if err != nil {
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return MailRef{}, exerr.Wrap(err, "").Build()
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}
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req.Header.Add("Authorization", "Bearer "+tok)
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req.Header.Add("X-Goog-Api-Client", "blackforestbytes-goext/"+goext.GoextVersion)
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req.Header.Add("User-Agent", "blackforestbytes-goext/"+goext.GoextVersion)
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req.Header.Add("Content-Type", "application/json")
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resp, err := c.http.Do(req)
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if err != nil {
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return MailRef{}, exerr.Wrap(err, "").Build()
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}
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respBody, err := io.ReadAll(resp.Body)
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if err != nil {
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return MailRef{}, exerr.Wrap(err, "").Build()
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}
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if resp.StatusCode != 200 {
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return MailRef{}, exerr.New(exerr.TypeGoogleStatuscode, "gmail returned non-200 statuscode").Int("sc", resp.StatusCode).Str("body", string(respBody)).Build()
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}
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var respObj MailRef
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err = json.Unmarshal(respBody, &respObj)
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if err != nil {
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return MailRef{}, exerr.Wrap(err, "").Str("body", string(respBody)).Build()
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}
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return respObj, nil
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}
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