# Middleware

There are several middlewares available provided by Starlette directly.

Read more about them in the [FastAPI docs for Middleware](https://fastapi.tiangolo.com/advanced/middleware/).

::: fastapi.middleware.cors.CORSMiddleware

It can be imported from `fastapi`:

```python
from fastapi.middleware.cors import CORSMiddleware
```

::: fastapi.middleware.gzip.GZipMiddleware

It can be imported from `fastapi`:

		}
	}
	r.TLS.PeerCertificates = peerCertificates

	// Now, we have to check that the client has provided exactly one leaf
	// certificate that we can map to a policy.
	if len(r.TLS.PeerCertificates) == 0 {
		writeSTSErrorResponse(ctx, w, ErrSTSMissingParameter, errors.New("No client certificate provided"))
		return
	}
	if len(r.TLS.PeerCertificates) > 1 {

 * <p>
 * This interface allows plugins and extensions to define and register additional programming languages
 * beyond the standard ones provided by Maven. Implementations of this interface will be discovered
 * through the Java ServiceLoader mechanism and their provided languages will be available
 * throughout the Maven build process.
 * <p>
 * Example usage:
 * <pre>

)

// New creates and returns a new Store instance.
//
// Parameters:
//   - size: The maximum capacity of the cache. If the provided size is less than or equal to 0,
//     it defaults to defaultMaxSize.
//   - ttl: The time-to-live duration for each cache entry. If the provided ttl is less than or equal to 0,
//     it defaults to defaultTTL.
//

    private AuthScope authScope;

    private Credentials credentials;

    private AuthScheme authScheme;

    /**
     * Initializes the AuthenticationImpl with the provided AuthScope and Credentials,
     * and sets the AuthScheme to null.
     * @param authScope The authentication scope.
     * @param credentials The credentials.
     */

            assertTrue(strategy.isApplicable(context), "Strategy should be applicable when --all is specified");
        }

        @Test
        @DisplayName("should be applicable by default when no specific options provided")
        void shouldBeApplicableByDefaultWhenNoSpecificOptions() {
            UpgradeOptions options = createDefaultOptions();

            UpgradeContext context = createMockContext(options);

    checkArgument(min <= max, "min (%s) must be less than or equal to max (%s)", min, max);
    return Math.min(Math.max(value, min), max);
  }

  /**
   * Returns the values from each provided array combined into a single array. For example, {@code
   * concat(new int[] {a, b}, new int[] {}, new int[] {c}} returns the array {@code {a, b, c}}.
   *
   * @param arrays zero or more {@code int} arrays

-->

<!--
 | This is the toolchains file for Maven. It can be specified at two levels:
 |
 |  1. User Level. This toolchains.xml file provides configuration for a single user,
 |                 and is normally provided in ${user.home}/.m2/toolchains.xml.
 |
 |                 NOTE: This location can be overridden with the CLI option:
 |
 |                 -t /path/to/user/toolchains.xml
 |
 |  2. Installation Level.

// byte arrays sized based on width.
func NewBytePoolCap(maxSize uint64, width int, capwidth int) (bp *BytePoolCap) {
	if capwidth <= 0 {
		panic("total buffer capacity must be provided")
	}
	if capwidth < 64 {
		panic("buffer capped with smaller than 64 bytes is not supported")
	}
	if width > capwidth {
		panic("minimum buffer length cannot be > capacity of the buffer")
	}
	return &BytePoolCap{

	// ErrSecretKeyMismatch indicates that the provided secret key (SSE-C client key / SSE-S3 KMS key)
	// does not match the secret key used during encrypting the object.
	ErrSecretKeyMismatch = Errorf("The secret key does not match the secret key used during upload")

	// ErrCustomerKeyMD5Mismatch indicates that the SSE-C key MD5 does not match the
	// computed MD5 sum. This means that the client provided either the wrong key for