if cred.IsTemp() && cred.IsExpired() {
				return nil, errInvalidAccessKeyID
			}
			return []byte(cred.SecretKey), nil
		} // this means claims.AccessKey == rootAccessKey
		if !globalAPIConfig.permitRootAccess() {
			// if root access is disabled, fail this request.
			return nil, errAccessKeyDisabled
		}
		return []byte(globalActiveCred.SecretKey), nil
	}); err != nil {
		return claims, nil, false, errAuthentication
	}

///

文件作为「表单数据」上传。

如果把*路径操作函数*参数的类型声明为 `bytes`，**FastAPI** 将以 `bytes` 形式读取和接收文件内容。

这种方式把文件的所有内容都存储在内存里，适用于小型文件。

不过，很多情况下，`UploadFile` 更好用。

## 含 `UploadFile` 的文件参数

定义文件参数时使用 `UploadFile`：

```Python hl_lines="12"
{!../../docs_src/request_files/tutorial001.py!}
```

`UploadFile` 与 `bytes` 相比有更多优势：

* 使用 `spooled` 文件：
    * 存储在内存的文件超出最大上限时，FastAPI 会把文件存入磁盘；

        * In responses, the `set` will be converted to a `list`.
        * The generated schema will specify that the `set` values are unique (using JSON Schema's `uniqueItems`).
* `bytes`:
    * Standard Python `bytes`.
    * In requests and responses will be treated as `str`.
    * The generated schema will specify that it's a `str` with `binary` "format".
* `Decimal`:
    * Standard Python `Decimal`.

    IDTYPE getId();

    void setId(IDTYPE id);

    String getTransformerName();

    void setTransformerName(String transformerName);

    byte[] getData();

    String getDataAsString();

    void setData(byte[] data);

    String getEncoding();

    void setEncoding(String encoding);

//
// Note: Only the scanner requires fivs.Versions to have exclusively non-free versions. This is used while enforcing NewerNoncurrentVersions lifecycle element.
func getFileInfoVersions(xlMetaBuf []byte, volume, path string, inclFreeVersions bool) (FileInfoVersions, error) {
	fivs, err := getAllFileInfoVersions(xlMetaBuf, volume, path, true)
	if err != nil {
		return fivs, err
	}

     * @throws SMBProtocolDecodingException
     *
     * @see jcifs.internal.smb2.ServerMessageBlock2#haveResponse(byte[], int, int)
     */
    @Override
    protected void haveResponse ( byte[] buffer, int start, int len ) throws SMBProtocolDecodingException {
        if ( isRetainPayload() ) {
            byte[] payload = new byte[len];
            System.arraycopy(buffer, start, payload, 0, len);
            setRawPayload(payload);

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package internaldebug

import (
	"bytes"
	"context"
	"fmt"
	"net/http"
	"strings"
	"testing"

	discovery "github.com/envoyproxy/go-control-plane/envoy/service/discovery/v3"
	"github.com/spf13/cobra"
	"google.golang.org/grpc"

 * limitations under the License.
 */
package okhttp3.internal.http2.flowcontrol

class WindowCounter(
  val streamId: Int,
) {
  /** The total number of bytes consumed. */
  var total: Long = 0L
    private set

  /** The total number of bytes acknowledged by outgoing `WINDOW_UPDATE` frames. */
  var acknowledged: Long = 0L
    private set

  val unacknowledged: Long
    @Synchronized get() = total - acknowledged

    @Override
    public int size () {
        return 4 + 2 * this.path.length();
    }


    @Override
    public int encode ( byte[] dst, int dstIndex ) {
        int start = dstIndex;
        SMBUtil.writeInt2(this.maxReferralLevel, dst, dstIndex);
        dstIndex += 2;
        byte[] pathBytes = this.path.getBytes(StandardCharsets.UTF_16LE);
        System.arraycopy(pathBytes, 0, dst, dstIndex, pathBytes.length);

//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package cmd

import (
	"bytes"
	"context"
	"encoding/hex"
	"errors"
	"fmt"
	"io"
	"log"
	"math/rand"
	"net"
	"os"
	"os/signal"
	"path/filepath"
	"runtime"
	"strings"
	"syscall"
	"time"