使用路径装饰器依赖项还可以避免开发新人误会代码中包含无用的未使用参数。

///

/// info | 信息

本例中，使用的是自定义响应头 `X-Key` 和 `X-Token`。

但实际开发中，尤其是在实现安全措施时，最好使用 FastAPI 内置的[安全工具（下一章）](../security/index.md)。

///

## 依赖项错误和返回值 { #dependencies-errors-and-return-values }

路径装饰器依赖项也可以使用普通的依赖项*函数*。

### 依赖项的需求项 { #dependency-requirements }

路径装饰器依赖项可以声明请求的需求项（比如响应头）或其他子依赖项：

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

                CopyUtil.copy(in, out);
            } catch (final ClientAbortException e) {
                logger.debug("Client aborts this request.", e);
            } catch (final IOException e) {
                logger.error("Failed to read file: path={}, filePath={}", path, filePath);
                throw new WebApiException(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, e);
            }
        } else {
            try {

        } catch (cnfe: ClassNotFoundException) {
          false
        }

      val isCorrettoSupported: Boolean =
        try {
          // Trigger an early exception over a fatal error, prefer a RuntimeException over Error.
          Class.forName("com.amazon.corretto.crypto.provider.AmazonCorrettoCryptoProvider")

          AmazonCorrettoCryptoProvider.INSTANCE.loadingError == null &&

common cipher suite and TLS version, your call will fail like this:

```
Caused by: javax.net.ssl.SSLProtocolException: SSL handshake aborted: ssl=0x7f2719a89e80:
    Failure in SSL library, usually a protocol error
        error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake
        failure (external/openssl/ssl/s23_clnt.c:770 0x7f2728a53ea0:0x00000000)
    at com.android.org.conscrypt.NativeCrypto.SSL_do_handshake(Native Method)

     * @param auth
     *            The NTLM password authenticator containing user credentials
     * @throws SmbException
     *             If there is an error setting up the signing digest
     */
    public SMB1SigningDigest(final SmbTransportInternal transport, final NtlmPasswordAuthenticator auth) throws SmbException {
        this.digest = Crypto.getMD5();
        try {

            for (ClassRealmManagerDelegate delegate : delegates) {
                try {
                    delegate.setupRealm(classRealm, request);
                } catch (Exception e) {
                    logger.error(
                            delegate.getClass().getName() + " failed to setup class realm " + classRealm + ": "
                                    + e.getMessage(),
                            e);
                }

        }

        List<String> changes = filterChangesToReport(oldClass, oldMethods)
        if (changes.isEmpty()) {
            return null
        }
        return acceptOrReject(c, changes, Violation.error(c, " methods removed in internal super class"))
    }

    private Set<CtMethod> collectAllPublicApiMethods(CtClass c) {
        Set<CtMethod> result = [] as Set
        collect(result, c)
        return result
    }

        }

        try {
            path = profileActivationFilePathInterpolator.interpolate(path, context);
        } catch (InterpolationException e) {
            problems.add(new ModelProblemCollectorRequest(Severity.ERROR, Version.BASE)
                    .setMessage("Failed to interpolate file location " + path + " for profile " + profile.getId() + ": "
                            + e.getMessage())

)

// loadClusterIAMMetrics - `MetricsLoaderFn` for cluster IAM metrics.
func loadClusterIAMMetrics(_ context.Context, m MetricValues, _ *metricsCache) error {
	m.Set(lastSyncDurationMillis, float64(atomic.LoadUint64(&globalIAMSys.LastRefreshDurationMilliseconds)))
	pluginAuthNMetrics := globalAuthNPlugin.Metrics()

		return false
	}

	// legacy linux indicator for printing warnings
	// about older Linux kernels and Go runtime.
	return currentKernel < kernel.Version(4, 0, 0)
}

func setMaxResources(ctx serverCtxt) (err error) {
	// Set the Go runtime max threads threshold to 90% of kernel setting.
	sysMaxThreads, err := sys.GetMaxThreads()
	if err == nil {
		minioMaxThreads := (sysMaxThreads * 90) / 100