app = FastAPI()


@app.post("/files/")
async def create_file(file: Annotated[bytes, File(description="A file read as bytes")]):
    return {"file_size": len(file)}


@app.post("/uploadfile/")
async def create_upload_file(
    file: Annotated[UploadFile, File(description="A file read as UploadFile")],
):

      @Override
      public int read(CharBuffer cbuf) throws IOException {
        return reader.read(cbuf);
      }
    };
  }

  private static Reader getChunkedReader(String input, int chunk) {
    return new FilterReader(new StringReader(input)) {
      @Override
      public int read(char[] cbuf, int off, int len) throws IOException {
        return super.read(cbuf, off, min(chunk, len));
      }
    };

    /**
     * Test for the readSetupWireFormat method.
     * It should always return 0.
     */
    @Test
    void testReadSetupWireFormat() {
        byte[] buffer = new byte[10];
        // The method should not read anything and return 0
        assertEquals(0, response.readSetupWireFormat(buffer, 0, 10), "readSetupWireFormat should return 0.");
    }

    /**
     * Test for the readParametersWireFormat method.

 * entries may be counted in {@link Cache#size}, but will never be visible to read or write
 * operations.
 *
 * <p>Certain cache configurations will result in the accrual of periodic maintenance tasks which
 * will be performed during write operations, or during occasional read operations in the absence of
 * writes. The {@link Cache#cleanUp} method of the returned cache will also perform maintenance, but

        w.start();

        // Wait until writer thread is ready
        synchronized (w) {
            long deadline = System.currentTimeMillis() + 2000;
            while (!w.isReady() && System.currentTimeMillis() < deadline) {
                w.wait(10);
            }
            assertTrue(w.isReady(), "WriterThread should be ready");

            // Submit a write that will throw inside the writer thread

* `write(data)`：將 `data` (`str` 或 `bytes`) 寫入檔案。
* `read(size)`：讀取檔案的 `size` (`int`) 個位元組/字元。
* `seek(offset)`：移動到檔案中的位元組位置 `offset` (`int`)。
    * 例如，`await myfile.seek(0)` 會移到檔案開頭。
    * 當你已經執行過 `await myfile.read()`，之後需要再次讀取內容時特別有用。
* `close()`：關閉檔案。

由於這些都是 `async` 方法，你需要以 await 呼叫它們。

例如，在 `async` 的路徑操作函式中可這樣讀取內容：

```Python
contents = await myfile.read()
```

若是在一般的 `def` 路徑操作函式中，你可以直接存取 `UploadFile.file`，例如：

        showEmptyState();
        hideErrorBanner();
        hideProgressIndicator();
        showStatus('ready');
        updateUI();  // Re-enable buttons and input
    }

    /**
     * Show status message
     * @param {string} status - Status type (thinking, error, ready)
     * @param {string} customMessage - Optional custom message to display
     */
    function showStatus(status, customMessage) {

                try {
                    // Invalidate any cached read data
                    // This would typically clear file's internal read buffers
                    // For now, we log the action as the actual implementation
                    // depends on SmbFile's internal caching mechanism
                    log.info("Invalidated read cache for: {}", path);
                } catch (Exception e) {

        }
    }

    /**
     * Performs RDMA read operation.
     *
     * @param buffer the buffer to read into
     * @param remoteAddress remote memory address
     * @param remoteKey remote access key
     * @param length number of bytes to read
     * @return number of bytes read
     * @throws IOException if operation fails
     */

				}
				if testing.Short() && readers > 10 {
					continue
				}
				t.Run(fmt.Sprintf("%d-read", readers), func(t *testing.T) {
					l := newLocker()
					for range locks {
						var tmp [16]byte
						rng.Read(tmp[:])
						res := []string{hex.EncodeToString(tmp[:])}

						for range readers {
							rng.Read(tmp[:])
							ok, err := l.RLock(t.Context(), dsync.LockArgs{
								UID:       uuid.NewString(),