ヘッダーのパラメータは、`Query`や`Path`、`Cookie`のパラメータを定義するのと同じように定義できます。

## `Header`をインポート

まず、`Header`をインポートします:

{* ../../docs_src/header_params/tutorial001.py hl[3] *}

## `Header`のパラメータの宣言

次に、`Path`や`Query`、`Cookie`と同じ構造を用いてヘッダーのパラメータを宣言します。

最初の値がデフォルト値で、追加の検証パラメータや注釈パラメータをすべて渡すことができます。

{* ../../docs_src/header_params/tutorial001.py hl[9] *}

/// note | 技術詳細

`Header`は`Path`や`Query`、`Cookie`の「姉妹」クラスです。また、同じ共通の`Param`クラスを継承しています。

# Release 2.17.1

### Bug Fixes and Other Changes

* Add necessary header files in the aar library. These are needed if developers build apps with header files unpacked from tflite aar files from maven.
* Implement Name() for GCSWritableFile to fix the profiler trace viewer cache file generation.

    </magic>
  </mime-type>
  <mime-type type="application/x-axcrypt">
    <_comment>AxCrypt</_comment>
    <glob pattern="*.axx" />
    <magic priority="60">
      <!-- AxCrypt block header, skip length field, then Header of type Preamble -->
      <match value="0xc0b9072e4f93f146a015792ca1d9e821" type="string" offset="0">
         <match value="2" type="big32" offset="17" />
      </match>
    </magic>
  </mime-type>

			header:          true,
			wantColumns:     []string{"header1", "header2", "header3"},
			wantFields:      "ok1,ok2,ok3\n" + `a word,"b"""` + "\n",
			wantErr:         io.EOF,
		},
		{
			// This works since LazyQuotes is true:
			file:            "invalid-badstartline.csv",
			recordDelimiter: "\n",
			fieldDelimiter:  ",",
			sendErr:         nil,
			header:          true,

contentType)&&v.setRequestHeader("Content-Type",k.contentType),v.setRequestHeader("Accept",k.dataTypes[0]&&k.accepts[k.dataTypes[0]]?k.accepts[k.dataTypes[0]]+("*"!==k.dataTypes[0]?", "+pc+"; q=0.01":""):k.accepts["*"]);for(j in k.headers)v.setRequestHeader(j,k.headers[j]);if(k.beforeSend&&(k.beforeSend.call(l,v,k)===!1||2===t))return v.abort();u="abort";for(j in{success:1,error:1,complete:1})v[j](k[j]);if(c=sc(oc,k,b,v)){v.readyState=1,i&&m.trigger("ajaxSend",[v,k]),k.async&&k.timeout>0&&(g=set...

        from fastapi import FastAPI, Response

        app = FastAPI()

        @app.head("/items/", status_code=204)
        def get_items_headers(response: Response):
            response.headers["X-Cat-Dog"] = "Alone in the world"
        ```
        """
        return self.router.head(
            path,
            response_model=response_model,
            status_code=status_code,

	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

Shinsuke Sugaya <******@****.***> 1763013292 +0900

	csv "github.com/minio/csvparser"
	"github.com/minio/minio/internal/bpool"
	"github.com/minio/minio/internal/s3select/sql"
)

// Reader - CSV record reader for S3Select.
type Reader struct {
	args         *ReaderArgs
	readCloser   io.ReadCloser          // raw input
	buf          *bufio.Reader          // input to the splitter
	columnNames  []string               // names of columns

	hdr := r.opts.HeaderSize // remaining header bytes
	var tokens int           // number of tokens to request

	if hdr > 0 { // available tokens go towards header first
		if hdr < b { // all of header can be accommodated
			r.opts.HeaderSize = 0
			need = int(math.Min(float64(b-hdr), float64(need))) // use remaining tokens towards payload
			tokens = need + hdr
		} else { // part of header can be accommodated
			r.opts.HeaderSize -= b - 1