`OAuth2PasswordBearer` 會讓 **FastAPI** 知道它是一個 security scheme，因此會以那種方式加入 OpenAPI。

但 `OAuth2PasswordRequestForm` 只是你也可以自己撰寫的一個類別型依賴，或是你也可以直接宣告 `Form` 參數。

只是因為這是很常見的用例，所以 **FastAPI** 直接內建提供，讓事情更簡單。

///

### 使用表單資料 { #use-the-form-data }

/// tip

`OAuth2PasswordRequestForm` 這個依賴類別的實例不會有以空白分隔長字串的 `scope` 屬性，而是會有一個 `scopes` 屬性，裡面是各個 scope 的實際字串清單。

本示例沒有使用 `scopes`，但如果你需要，功能已經在那裡了。

///

          System.out.println(response.body().string());
        }
      }
    ```

### Posting form parameters ([.kt][PostFormKotlin], [.java][PostFormJava])

Use `FormBody.Builder` to build a request body that works like an HTML `<form>` tag. Names and values will be encoded using an HTML-compatible form URL encoding.

=== ":material-language-kotlin: Kotlin"
    ```kotlin
      private val client = OkHttpClient()

    Object writeReplace() {
    return super.writeReplace();
  }

  @GwtIncompatible
  @J2ktIncompatible
  /*
   * The mainline copy of ImmutableMapValues doesn't produce this serialized form anymore, though
   * the backport does. For now, we're keeping the class declaration in *both* flavors so that both
   * flavors can read old data or data from the other flavor. However, we strongly discourage

/// info | Informação

A própria `JSONResponse` é uma subclasse de `Response`.

///

E quando você retorna uma `Response`, o **FastAPI** vai repassá-la diretamente.

Ele não fará conversões de dados com modelos do Pydantic, não converterá o conteúdo para nenhum tipo, etc.

Isso te dá bastante flexibilidade. Você pode retornar qualquer tipo de dado, sobrescrever qualquer declaração e validação nos dados, etc.

   * Sec-CH-UA-Form-Factor}</a> header field name.
   *
   * @deprecated Prefer {@link SEC_CH_UA_FORM_FACTORS}.
   * @since 32.0.0
   */
  @Deprecated public static final String SEC_CH_UA_FORM_FACTOR = "Sec-CH-UA-Form-Factor";

  /**
   * The HTTP <a href="https://wicg.github.io/ua-client-hints/#sec-ch-ua-form-factors">{@code

/** File generated by Grunt -- do not modify
 *  JQUERY-FORM-VALIDATOR
 *
 *  @version 2.3.77
 *  @website http://formvalidator.net/
 *  @author Victor Jonsson, http://victorjonsson.se
 *  @license MIT
 */

public class LicenseAnalyzer {
    /*
     * Order here matters. License files can often contain multiple licenses for which the particular piece of software may by used under.
     * We should order these in order of most permissive to least permissive such that we identify the license as the most permissive for
     * purposes of redistribution. Search order is as defined below so the license will be identified as the first pattern to match.

        this.version = version;
    } // -- void setVersion( String )

    /**
     * Gets the identifier of the extension.
     *
     * @return The extension id in the form {@code <groupId>:<artifactId>:<version>}, never {@code null}.
     */
    public String getId() {
        StringBuilder id = new StringBuilder(128);

 *
 * Note that any other form is unsupported. You may not use asterisks in any position other than
 * the leftmost label.
 *
 * If multiple patterns match a hostname, any match is sufficient. For example, suppose pin A
 * applies to `*.publicobject.com` and pin B applies to `api.publicobject.com`. Handshakes for
 * `api.publicobject.com` are valid if either A's or B's certificate is in the chain.

   * needed again; and for short-lived ones, it does not matter.
   */

  /**
   * Padded variant of AtomicLong supporting only raw accesses plus CAS. The value field is placed
   * between pads, hoping that the JVM doesn't reorder them.
   *
   * <p>JVM intrinsics note: It would be possible to use a release-only form of CAS here, if it were
   * provided.
   */
  static final class Cell {
    volatile long p0, p1, p2, p3, p4, p5, p6;