#2593 allow render raw content

Use URL query parameter render=1 to render content in raw mode.

routers/repo/download.go

@@ -28,7 +28,7 @@ func ServeData(ctx *context.Context, name string, reader io.Reader) error {
 			ctx.Resp.Header().Set("Content-Disposition", "attachment; filename=\""+path.Base(ctx.Repo.TreeName)+"\"")
 			ctx.Resp.Header().Set("Content-Transfer-Encoding", "binary")
 		}
-	} else {
+	} else if !ctx.QueryBool("render") {
 		ctx.Resp.Header().Set("Content-Type", "text/plain; charset=utf-8")
 	}
 	ctx.Resp.Write(buf)