fixes images really

helper/download.go

@@ -8,10 +8,26 @@ import (
 func HTTPDownload(uri string) ([]byte, error) {
 	res, err := http.Get(uri)
 	if err != nil {
+		return nil, err
 	}
 	defer res.Body.Close()
 	d, err := ioutil.ReadAll(res.Body)
 	if err != nil {
 	}
 	return d, err
 }
+
+func HTTPDownloadWithToken(uri string, token string) ([]byte, error) {
+	req, err := http.NewRequest("GET", uri, nil)
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Authorization", "Bearer " + token)
+	client := http.Client{}
+	res, err := client.Do(req)
+	defer res.Body.Close()
+	d, err := ioutil.ReadAll(res.Body)
+	if err != nil {
+	}
+	return d, err
+}

slack/slack_client.go

@@ -83,7 +83,7 @@ func (c Client) mapAttachments(attachments []slack.File) []model.Attachment {
 		if len(url) <= 0 {
 			url = attachment.URLPrivateDownload
 		}
-		download, err := helper.HTTPDownload(url)
+		download, err := helper.HTTPDownloadWithToken(url, c.Token)
 		if err != nil {
 			panic(err)
 		}