"input": "plumbus"
        }
    ]
}
```

## 总结 { #summary }

你可以使用 **Pydantic 模型**在 **FastAPI** 中声明**查询参数**。😎

/// tip | 提示

剧透警告：你也可以使用 Pydantic 模型来声明 cookie 和 headers，但你将在本教程的后面部分阅读到这部分内容。🤫

   * do double-duty to make sure the counting and content are consistent, particularly when it comes
   * to awkward operations like measuring the encoded length of header strings, or the
   * length-in-digits of an encoded integer.
   */
  private fun writeOrCountBytes(
    sink: BufferedSink?,
    countBytes: Boolean,
  ): Long {
    var byteCount = 0L

            @Override
            protected int readHeaderWireFormat(byte[] buffer, int bufferIndex) {
                // Simulate header reading
                return 33;
            }
        };
        byte[] buffer = new byte[1024];

        // Setup buffer after header
        buffer[33] = 4; // wordCount
        buffer[34] = (byte) 0xFF; // andxCommand
        buffer[36] = 0; // andxOffset low

	// Before proceeding validate if bucket exists.
	_, err := objAPI.GetBucketInfo(ctx, bucket, BucketOptions{})
	if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

	aclHeader := r.Header.Get(xhttp.AmzACL)
	if aclHeader == "" {
		acl := &accessControlPolicy{}
		if err = xmlDecoder(r.Body, acl, r.ContentLength); err != nil {
			if terr, ok := err.(*xml.SyntaxError); ok && terr.Msg == io.EOF.Error() {

     */
    @Resource
    protected AccessTokenService accessTokenService;

    /**
     * HTTP servlet request object providing access to request parameters, headers,
     * and other request-specific information needed for API processing.
     */
    @Resource
    protected HttpServletRequest request;

    /**

    void testDecode() throws Exception {
        // Test the decode method which is inherited from ServerMessageBlock
        byte[] buffer = new byte[256];

        // Set up a minimal SMB header (size 32 bytes)
        // SMB signature
        buffer[0] = (byte) 0xFF;
        buffer[1] = 'S';
        buffer[2] = 'M';
        buffer[3] = 'B';

        // Command - SMB_COM_TRANSACTION2

	return messWith("crc32-not-streamed.zip", func(b []byte) {
		// Corrupt foo.txt's final crc32 byte, in both
		// the file header and TOC. (0x7e -> 0x7f)
		b[0x11]++
		b[0x9d]++

		// TODO(bradfitz): add a new test that only corrupts
		// one of these values, and verify that that's also an
		// error. Currently, the reader code doesn't verify the
		// fileheader and TOC's crc32 match if they're both

        String params = "test";
        byte[] buffer = createBuffer(10, dataBytes, params);

        // Verify buffer structure
        assertTrue(buffer.length >= 14, "Buffer should contain header, params and data");
    }

    @Test
    public void testByteOperations() {
        // Test byte operations that were used in the original test
        byte b = (byte) 0xFF;
        int value = b & 0xFF;

// The downside is that renaming uname or gname by the OS never takes effect.
var userMap, groupMap sync.Map // map[int]string

func statUnix(fi fs.FileInfo, h *Header, doNameLookups bool) error {
	sys, ok := fi.Sys().(*syscall.Stat_t)
	if !ok {
		return nil
	}
	h.Uid = int(sys.Uid)
	h.Gid = int(sys.Gid)
	if doNameLookups {
		// Best effort at populating Uname and Gname.

但在實際情況下，當你實作安全機制時，使用整合的 [Security utilities（下一章）](../security/index.md) 會獲得更多好處。

///

## 依賴的錯誤與回傳值 { #dependencies-errors-and-return-values }

你可以使用與平常相同的依賴函式。

### 依賴的需求 { #dependency-requirements }

它們可以宣告請求需求（例如標頭（headers））或其他子依賴：

{* ../../docs_src/dependencies/tutorial006_an_py310.py hl[8,13] *}

### 拋出例外 { #raise-exceptions }

這些依賴可以 `raise` 例外，與一般依賴相同：

{* ../../docs_src/dependencies/tutorial006_an_py310.py hl[10,15] *}