ContentCachingResponseWrapper не возвращает ответ сервлета на клиент ⇐ JAVA

[Anonymous]

org.springframework.boot Spring-Boot-Starter-Parent-Parent 2.7.13,
ContentCachingResponseWrapper,
deferredresult,
openjdk 1.8.0_202 < /p>
Фильтр: < /p>
@Component
@Order(Ordered.HIGHEST_PRECEDENCE)
public class ContentCachingFilter extends OncePerRequestFilter {
private static final Logger logger = LoggerFactory.getLogger(ContentCachingFilter.class);
public static final String REST_UUID = "X-request-id";

@Override
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
ContentCachingResponseWrapper responseWrapper = new ContentCachingResponseWrapper(response);

if (request.getHeader(REST_UUID) == null) {
String uuid = UUID.randomUUID().toString();
request.setAttribute(REST_UUID, uuid);
response.setHeader(REST_UUID, uuid);
} else {
String headerParam = request.getHeader(REST_UUID);
request.setAttribute(REST_UUID, headerParam);
response.setHeader(REST_UUID, headerParam);
}

logger.info("Before ContentCachingFilter");

filterChain.doFilter(request, responseWrapper);

logger.info("After ContentCachingFilter");
responseWrapper.copyBodyToResponse();

}
}
< /code>
Сервлет: < /p>
@Slf4j
@RestController
@RequestMapping("/servlet")
public class MyServlet {

int counter = 1;

@PostMapping("/deferred")
DeferredResult doDeferred(HttpServletRequest request, @RequestBody String requestBody) throws InterruptedException {
final ResponseEntity timeoutResponse = ResponseEntity.status(503).body("Deferred timeout");
final DeferredResult responseEntityDeferredResult = new DeferredResult(6000L,timeoutResponse);

if(requestBody == null){
requestBody = "anything";
}
final String finalRequestBody = requestBody;
counter++;
System.out.println(counter);
if(finalRequestBody.contains("sleep")){
ForkJoinPool.commonPool().submit(() -> {
log.info("Processing in separate thread");
if(finalRequestBody.equals("sleepMore")){
try {
Thread.sleep(10000);
} catch (InterruptedException e) {

}
} else {
try {
Thread.sleep(4000);
} catch (InterruptedException e) {

}
}

log.info("After the sleep execution");
responseEntityDeferredResult.setResult(ResponseEntity.status(200).body("Deferred successfully returned"));
log.info("Finished processing in separate thread");
});
} else {
responseEntityDeferredResult.setResult(ResponseEntity.status(200).body("Deferred successfully returned"));
}

return responseEntityDeferredResult;
}

}
< /code>
Результат службы: < /p>
C:\Users\XXX\Desktop\CURL>curl -H "Content-Type:text/plain" --trace-time http://localhost:18080/servlet/deferred -d
sleep -v
13:16:39.266200 * Host localhost:18080 was resolved.
13:16:39.275872 * IPv6: ::1
13:16:39.278151 * IPv4: 127.0.0.1
13:16:39.286604 * Trying [::1]:18080...
13:16:39.291555 * Connected to localhost (::1) port 18080
13:16:39.295087 > POST /servlet/deferred HTTP/1.1
13:16:39.295087 > Host: localhost:18080
13:16:39.295087 > User-Agent: curl/8.9.1
13:16:39.295087 > Accept: */*
13:16:39.295087 > Content-Type:text/plain
13:16:39.295087 > Content-Length: 5
13:16:39.295087 >
13:16:39.314630 * upload completely sent off: 5 bytes
13:16:43.443178 < HTTP/1.1 200
13:16:43.445868 < X-request-id: faec4178-3dc7-4e5f-a5bc-55d7ff46629a
13:16:43.449375 < Content-Type: text/plain;charset=UTF-8
13:16:43.452905 < Content-Length: 30
13:16:43.454768 < Date: Mon, 27 Jan 2025 12:16:44 GMT
13:16:43.458651 <
13:17:44.198648 * end of response with 30 bytes missing
13:17:44.203690 * closing connection #0
curl: (18) end of response with 30 bytes missing
< /code>
Ожидаемый результат службы при использовании объекта Httpservletresponse вместо объекта ContentCachingResponseWrapper: < /p>
C:\Users\XXX\Desktop\CURL>curl -H "Content-Type:text/plain" --trace-time http://localhost:18080/servlet/deferred -d sleep -v
13:32:24.414975 * Host localhost:18080 was resolved.
13:32:24.423820 * IPv6: ::1
13:32:24.426342 * IPv4: 127.0.0.1
13:32:24.434983 * Trying [::1]:18080...
13:32:24.439253 * Connected to localhost (::1) port 18080
13:32:24.443102 > POST /servlet/deferred HTTP/1.1
13:32:24.443102 > Host: localhost:18080
13:32:24.443102 > User-Agent: curl/8.9.1
13:32:24.443102 > Accept: */*
13:32:24.443102 > Content-Type:text/plain
13:32:24.443102 > Content-Length: 5
13:32:24.443102 >
13:32:24.462354 * upload completely sent off: 5 bytes
13:32:28.591708 < HTTP/1.1 200
13:32:28.594241 < X-request-id: a7d2adef-1155-4903-8b11-bc4836af7c32
13:32:28.597334 < Content-Type: text/plain;charset=UTF-8
13:32:28.600276 < Content-Length: 30
13:32:28.602554 < Date: Mon, 27 Jan 2025 12:32:28 GMT
13:32:28.605220 <
Deferred successfully returned13:32:28.606942 * Connection #0 to host localhost left intact
< /code>
httpservletresponse знает о ответе сервлета, ContentCachingResponseWrapper не является. Почему я не получаю полезную нагрузку ответа на обслуживание, используя ContentCachingResponseWrapper?

Подробнее здесь: https://stackoverflow.com/questions/793 ... the-client