Groupme -> Matrix Images

groupmeExt/message.go

@@ -5,6 +5,8 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"io/ioutil"
+	"net/http"
 
 	"github.com/karmanyaahm/groupme"
 )
@@ -31,3 +33,26 @@ func (m *Message) Value() (driver.Value, error) {
 	}
 	return e, nil
 }
+
+//DownloadImage helper function to download image from groupme;
+// append .large/.preview/.avatar to get various sizes
+func DownloadImage(URL string) (bytes *[]byte, mime string, err error) {
+	//TODO check its actually groupme?
+	response, err := http.Get(URL)
+	if err != nil {
+		return nil, "", errors.New("Failed to download avatar: " + err.Error())
+	}
+	defer response.Body.Close()
+
+	image, err := ioutil.ReadAll(response.Body)
+	bytes = &image
+	if err != nil {
+		return nil, "", errors.New("Failed to read downloaded image:" + err.Error())
+	}
+
+	mime = response.Header.Get("Content-Type")
+	if len(mime) == 0 {
+		mime = http.DetectContentType(image)
+	}
+	return
+}