{!../../docs_src/middleware/tutorial001.py!}
```

/// tip

Keep in mind that custom proprietary headers can be added <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers" class="external-link" target="_blank">using the 'X-' prefix</a>.

            try {
                String prefix = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
                int n = getContext().getConfig().getMaximumBufferSize() / 100;
                for ( int i = 0; i < n; i++ ) {
                    try ( SmbResource c = f.resolve(String.format("%s%d.tmp", prefix, i)) ) {
                        c.createNewFile();

- To be able to easily get the temporary credentials to upload to a prefix. Make it possible for a client to upload a whole folder using the session. The server side applications need not create a presigned URL and serve to the client for each file. Since, the client would have the session it can do it by itself.

	// be part of the object. Therefore, the bucket/object name must be added
	// to the context, if not present, whenever a decryption is performed.
	MetaContext = "X-Minio-Internal-Server-Side-Encryption-Context"

	// ARNPrefix prefix for "arn:aws:kms"
	ARNPrefix = "arn:aws:kms:"
)

// IsMultiPart returns true if the object metadata indicates
// that it was uploaded using some form of server-side-encryption
// and the S3 multipart API.

import org.apache.maven.plugin.PluginManagerException;
import org.apache.maven.plugin.PluginNotFoundException;
import org.apache.maven.plugin.PluginResolutionException;
import org.apache.maven.plugin.prefix.NoPluginFoundForPrefixException;
import org.apache.maven.plugin.version.PluginVersionResolutionException;
import org.apache.maven.project.MavenProject;

/**

func isHTTPHeaderSizeTooLarge(header http.Header) bool {
	var size, usersize int
	for key := range header {
		length := len(key) + len(header.Get(key))
		size += length
		for _, prefix := range userMetadataKeyPrefixes {
			if stringsHasPrefixFold(key, prefix) {
				usersize += length
				break
			}
		}
		if usersize > maxUserDataSize || size > maxHeaderSize {
			return true
		}
	}
	return false
}

        // + 4 byte (== r bits) big endian encoding of L
        suffix[ suffix.length - 1 ] = (byte) 128;

        DerivationParameters param = new KDFCounterParameters(sessionKey, null /* prefix */, suffix /* suffix */, r /* r */);
        gen.init(param);

        byte[] derived = new byte[16];
        gen.generateBytes(derived, 0, 16);
        return derived;
    }


    /**

public class MavenPropertiesLoader {

    public static final String INCLUDES_PROPERTY = "${includes}"; // includes

    public static final String OVERRIDE_PREFIX =
            "maven.override."; // prefix that marks that system property should override defaults.

    public static void loadProperties(
            java.util.Properties properties, Path path, Function<String, String> callback, boolean escape)

      ],
      "CurrentTime": [
        "2022-05-07T18:31:41Z"
      ],
      "Delimiter": [
        "/"
      ],
      "EpochTime": [
        "1651948301"
      ],
      "Prefix": [
        ""
      ],
      "Referer": [
        ""
      ],
      "SecureTransport": [
        "false"
      ],
      "SourceIp": [
        "127.0.0.1"
      ],
      "User-Agent": [

  source ./ci/official/utilities/windows.sh
  echo 'Converting MSYS Linux-like paths to Windows paths (for Docker, Python, etc.)'
  source <(python ./ci/official/utilities/convert_msys_paths_to_win_paths.py --whitelist-prefix TFCI_)
fi

# Run all "tfrun" commands under Docker. See setup_docker.sh for details
if [[ "$TFCI_DOCKER_ENABLE" == 1 ]]; then
  source ./ci/official/utilities/setup_docker.sh
fi