En utilisant seulement `BackgroundTasks` (et non `BackgroundTask`), il est possible de l'utiliser en tant que paramètre de *fonction de chemin* et de laisser **FastAPI** gérer le reste pour vous, comme en utilisant l'objet `Request` directement.

Il est tout de même possible d'utiliser `BackgroundTask` seul dans **FastAPI**, mais dans ce cas il faut créer l'objet dans le code et renvoyer une `Response` Starlette l'incluant.

        // in.available() always returns 0 (the default).
        int skip = (int) min(remaining, BUFFER_SIZE);
        if (buf == null) {
          // Allocate a buffer bounded by the maximum size that can be requested, for
          // example an array of BUFFER_SIZE is unnecessary when the value of remaining
          // is smaller.
          buf = new byte[skip];
        }
        if ((skipped = in.read(buf, 0, skip)) == -1) {

        override fun writeTo(sink: BufferedSink) {
          sink.writeUtf8("Hello request!")
          sink.close()
        }

        override fun isDuplex(): Boolean = true
      }
    val request =
      request()
        .post(asyncRequestBody)
        .build()
    val response = client.newCall(request).execute()
    Assumptions.assumeTrue(response.protocol == Protocol.HTTP_2)

		// Skip metadata
		err = r.mr.Skip()
		if err != nil {
			if err == io.EOF {
				err = io.ErrUnexpectedEOF
			}
			r.err = err
			return err
		}
	}
}

// readN will return all the requested number of entries in order
// or all if n < 0.
// Will return io.EOF if end of stream is reached.
// If requesting 0 objects nil error will always be returned regardless of at end of stream.

     */
    @Override
    public ResponseData doGet(final String uri) {
        return processRequest(uri, true);
    }

    /**
     * Processes an SMB request for the given URI.
     *
     * @param uri the URI to process
     * @param includeContent whether to include content in the response
     * @return the response data
     */

	if err != nil {
		return nil, err
	}
	if len(b) != md5.Size {
		return nil, errors.New("etag: invalid content-md5")
	}
	return ETag(b), nil
}

// ContentMD5Requested - for http.request.header is not request Content-Md5
func ContentMD5Requested(h http.Header) bool {
	_, ok := h[xhttp.ContentMD5]
	return ok
}

// Multipart computes an S3 multipart ETag given a list of

  private var contextSwitchCount = 0

  /** Guarded by `this`. */
  private var activeThreads = 0

  /** A task runner that posts tasks to this fake. Tasks won't be executed until requested. */
  val taskRunner: TaskRunner =
    TaskRunner(
      object : TaskRunner.Backend {
        override fun execute(
          taskRunner: TaskRunner,
          runnable: Runnable,
        ) {

   * in turn invoke arbitrary code it is not safe to call while holding a lock.
   */
  @SuppressWarnings("Interruption") // We are implementing a user-requested interrupt.
  final void interruptTask() {
    // Since the Thread is replaced by DONE before run() invokes listeners or returns, if we succeed

            unc = dunc;
            if (request != null && request.path != null && request.path.endsWith("\\") && !dunc.endsWith("\\")) {
                dunc += "\\";
            }
            if (request != null) {
                request.path = dunc;
                request.flags2 |= SmbConstants.FLAGS2_RESOLVE_PATHS_IN_DFS;
            }

					// let the client see lower value as well
					throughputHighestGet = totalGet
				}
				sendResult()
				break
			}

			// We break if we did not see 2.5% growth rate in total GET
			// requests, we have reached our peak at this point.
			doBreak := float64(totalGet-throughputHighestGet)/float64(totalGet) < 0.025

			throughputHighestGet = totalGet
			throughputHighestResults = results