fix files uploading

main.go

@@ -90,6 +90,9 @@ func main() {
 		}
 		// single file
 		file, _ := ctx.FormFile("file")
+		if file == nil {
+			ctx.String(http.StatusBadRequest, "file is nil")
+		}
 		// generateMins := c.Param("generateMins")
 		// log.Println(file.Filename)
 
@@ -127,8 +130,9 @@ func main() {
 					if err != nil {
 						ctx.String(http.StatusInternalServerError, "TODO") //TODO
 					}
+					data := file.Data.(primitive.Binary)
 
-					ctx.Data(200, "image/jpeg", file.Data.(primitive.Binary).Data)
+					ctx.Data(http.StatusOK, "image/jpeg", data.Data)
 				})
 			}
 		}