Send image with ImageMessage{} return broken thumbnail on whatsapp mobile

[tianrosandhy]

Hello, I want to ask about send image feature.
I have this function to generate image message that will be sent.

func GenerateImageMessage(client *whatsmeow.Client, imageData []byte, media *model.Media, caption string) (msg waProto.Message, err error) {
	resp, err := client.Upload(context.Background(), imageData, whatsmeow.MediaImage)
	if err != nil {
		return
	}

	imageMsg := waProto.ImageMessage{
		Caption:       proto.String(caption),
		Mimetype:      proto.String(media.GetMimetype()),
		Url:           &resp.URL,
		DirectPath:    &resp.DirectPath,
		MediaKey:      resp.MediaKey,
		FileEncSha256: resp.FileEncSHA256,
		FileSha256:    resp.FileSHA256,
		FileLength:    &resp.FileLength,
	}
	msg.ImageMessage = &imageMsg

	return
}

The image is sent successfully, but when I see them from mobile device, the thumbnail before download is broken like this

Anybody ever faced this issue before? Thank you..

[ronaldoklais]

Thumb need to be sent in field JpegThumbnail []byte

[mamur-rezeki]

See on #204