///

FastAPI will now:

* **Validate** the data making sure that the max length is 50 characters
* Show a **clear error** for the client when the data is not valid
* **Document** the parameter in the OpenAPI schema *path operation* (so it will show up in the **automatic docs UI**)

## Alternative (old): `Query` as the default value { #alternative-old-query-as-the-default-value }

* Add a **JSON Schema** for the response, in the OpenAPI *path operation*.
    * This will be used by the **automatic docs**.
    * It will also be used by automatic client code generation tools.

But most importantly:

  }

  private fun websocketScheme(scheme: String) {
    webServer.enqueue(
      MockResponse
        .Builder()
        .webSocketUpgrade(serverListener)
        .build(),
    )
    val request =
      Request
        .Builder()
        .url(scheme + "://" + webServer.hostName + ":" + webServer.port + "/")
        .build()

        // Assert
        assertEquals(1234, url.getPort(), "Explicit port should be preserved");
        assertEquals("smb", url.getProtocol());
    }

    @Test
    @DisplayName("parseURL: relative spec without scheme is prefixed for empty host")
    void testParseURL_RelativeSpecWithEmptyHost() throws MalformedURLException {
        // Arrange: base URL with empty host
        Handler handler = newHandler();

## OpenAPI Metadata - Docs { #openapi-metadata-docs }

To add metadata to your OpenAPI schema, including a license, version, contact, etc, read the docs for [Tutorial - Metadata and Docs URLs](../tutorial/metadata.md){.internal-link target=_blank}.

## OpenAPI Custom URL { #openapi-custom-url }

* In der OpenAPI *Pfadoperation* ein **JSON-Schema** für die Response hinzuzufügen.
    * Dieses wird von der **automatischen Dokumentation** verwendet.
    * Es wird auch von automatisch Client-Code-generierenden Tools verwendet.

Aber am wichtigsten:

   *
   * ```
   * 0b00xxxxxx Universal
   * 0b01xxxxxx Application
   * 0b10xxxxxx Context-Specific
   * 0b11xxxxxx Private
   * ```
   */
  var tagClass: Int,
  /** Identifies which member in the ASN.1 schema the field holds. */
  var tag: Long,
  /**
   * If the constructed bit is set it indicates that the value is composed of other values that have
   * their own headers.
   *

func (o *ObjectInfo) IsCompressedOK() (bool, error) {
	scheme, ok := o.UserDefined[ReservedMetadataPrefix+"compression"]
	if !ok {
		return false, nil
	}
	switch scheme {
	case compressionAlgorithmV1, compressionAlgorithmV2:
		return true, nil
	}
	return true, fmt.Errorf("unknown compression scheme: %s", scheme)
}

// GetActualSize - returns the actual size of the stored object

    /**
     * Enumeration of model versions that can be validated.
     * These versions correspond to different levels of validation that can be applied
     * during model building, based on the POM schema version.
     * <p>
     * The validation levels are cumulative, with higher versions including all validations
     * from lower versions plus additional checks specific to that version.
     */
    enum Version {

De plus, la meilleure approche était d'utiliser des normes déjà existantes.

Ainsi, avant même de commencer à coder **FastAPI**, j'ai passé plusieurs mois à étudier les spécifications d'OpenAPI, JSON Schema, OAuth2, etc. Comprendre leurs relations, leurs similarités et leurs différences.

## Conception