OutputStream是否应该在StreamingResponseBody中显式关闭？

Question

我正在使用StreamingResponseBody在一个spring @RestController中传输一个大型外部资源。

问:响应体的OutputStream是否应该在这里显式关闭？

@GetMapping("/{filename}")
public ResponseEntity<StreamingResponseBody> getFile(@PathVariable String filename) {
            StreamingResponseBody responseBody = outputStream -> {
                resolveExternally(outputStream, response, filename);

                //TODO should the stream be closed explicit here?
                //outputStream.close();
            };

            return ResponseEntity.ok(responseBody);
}

Answer 1

它将被集装箱关闭。检查StreamingResponseBodyReturnValueHandler。

OutputStream封装了一个本机HttpServletResponse。

HttpServletResponse response = webRequest.getNativeResponse(HttpServletResponse.class);
Assert.state(response != null, "No HttpServletResponse");
ServerHttpResponse outputMessage = new ServletServerHttpResponse(response);

如果您跟踪它，您将到达CoyoteAdapter，它正在调用finishResponse()并关闭OutputBuffer。