Refactored a bit the code; the original code was too experimental in style.

src/restapi.ts

@@ -30,7 +30,7 @@ function getFileHandlerFactory(fileService: FileService): Handler {
     return async (ctx: Context) => {
         const untypedCtx: any = ctx;
         const fileId = untypedCtx.params.path;
-        const reader = await fileService.getBodyAsReader(fileId);
+        const reader = await fileService.getContentAsReader(fileId);
         if(reader == null){
             ctx.response.status = 404;
             return;