# Segurança - Primeiros Passos { #security-first-steps }

Vamos imaginar que você tem a sua API de **backend** em algum domínio.

E você tem um **frontend** em outro domínio ou em um path diferente no mesmo domínio (ou em uma aplicação mobile).

E você quer uma maneira de o frontend autenticar com o backend, usando um **username** e **password**.

Podemos usar **OAuth2** para construir isso com o **FastAPI**.

#### Identity information 

This is an inappropriate use of lazy types:

```groovy
class Example {
    Provider<String> getPath() {
        return project.provider(() -> path)
    }
}
```

Like above, this is an immutable part of the identity of the domain object and cannot be changed.

### Properties in entirely new classes

import org.jspecify.annotations.NullUnmarked;

/**
 * @author Kevin Bourrillion
 */
@GwtCompatible
@NullUnmarked
public class ImmutableIntArrayTest extends TestCase {
  // Test all creation paths very lazily: by assuming asList() works

  public void testOf0() {
    assertThat(ImmutableIntArray.of().asList()).isEmpty();
  }

  public void testOf1() {

* Paths containing backsteps (for example, "../bar") are no longer allowed in hostPath volume paths, or in volumeMount subpaths ([#47290](https://github.com/kubernetes/kubernetes/pull/47290), [@jhorwit2](https://github.com/jhorwit2))

 * including user authentication, validation, message handling, and access context management.
 * It extends LastaFlute's TypicalAction and implements validation and HTML path interfaces.
 *
 * @since 1.0
 */
public abstract class FessBaseAction extends TypicalAction // has several interfaces for direct use
        implements LaValidatable<FessMessages>, FessHtmlPath {

    /**

			return err
		}, index)
	}

	return metadataArray, g.Wait()
}

// shuffleDisksAndPartsMetadataByIndex this function should be always used by GetObjectNInfo()
// and CompleteMultipartUpload code path, it is not meant to be used with PutObject,
// NewMultipartUpload metadata shuffling.

///

### `FileResponse` { #fileresponse }

Streamt eine Datei asynchron als Response.

Nimmt zur Instanziierung einen anderen Satz von Argumenten entgegen als die anderen Response-Typen:

* `path` – Der Dateipfad zur Datei, die gestreamt werden soll.
* `headers` – Alle benutzerdefinierten Header, die inkludiert werden sollen, als Dictionary.

        }
    }

    /**
     * Converts a robots.txt pattern to a regular expression.
     *
     * @param path The robots.txt pattern to convert
     * @return The equivalent regular expression
     */
    protected String convertRobotsTxtPatternToRegex(final String path) {
        String newPath = path.replace(".", "\\.").replace("?", "\\?").replace("*", ".*");
        if (newPath.charAt(0) != '/') {

            bb.putShort((short) 300); // ttl
            bb.putShort((short) 20); // pathOffset
            bb.putShort((short) 24); // altPathOffset
            bb.putShort((short) 28); // nodeOffset

            // Add path string at offset 20 (8 + 20 = 28)
            bb.position(28);
            bb.put("\\test\0".getBytes(StandardCharsets.UTF_16LE));

            int bytesDecoded = buffer.decode(testBuffer, 0, testBuffer.length);

     *         repository).
     */
    File getPomFile();

    /**
     * Sets the POM file of the project to build. Note that providing the path to a POM file via this method will make
     * the model builder operate in project mode. This mode is meant for effective models that are employed during the