It will be called by **FastAPI** whenever it receives a request to the URL "`/`" using a `GET` operation.

In this case, it is an `async` function.

---

You could also define it as a normal function instead of `async def`:

{* ../../docs_src/first_steps/tutorial003_py310.py hl[7] *}

/// note

If you don't know the difference, check the [Async: *"In a hurry?"*](../async.md#in-a-hurry).

///

{* ../../docs_src/dependencies/tutorial007_py310.py hl[5:6] *}

/// tip

You can use `async` or regular functions.

**FastAPI** will do the right thing with each, the same as with normal dependencies.

///

## A dependency with `yield` and `try` { #a-dependency-with-yield-and-try }

   *         <li>UNSET, meaning "null pointer"
   *         <li>one plus an index into the entries and elements array
   *       </ul>
   *   <li>another java.util.Set delegate implementation. In most modern JDKs, normal java.util hash
   *       collections intelligently fall back to a binary search tree if hash table collisions are
   *       detected. Rather than going to all the trouble of reimplementing this ourselves, we

pkg go/doc, type Note struct, Pos token.Pos
pkg go/doc, type Note struct, UID string
pkg go/doc, type Package struct, Notes map[string][]*Note
pkg go/doc, var IllegalPrefixes []string
pkg go/format, func Node(io.Writer, *token.FileSet, interface{}) error
pkg go/format, func Source([]uint8) ([]uint8, error)
pkg go/parser, const AllErrors = 32
pkg go/parser, const AllErrors Mode
pkg go/parser, const DeclarationErrors = 16

    public static final int ACB_PWNOTREQ = 4;
    /** Account control bit flag: Temporary duplicate account */
    public static final int ACB_TEMPDUP = 8;
    /** Account control bit flag: Normal user account */
    public static final int ACB_NORMAL = 16;
    /** Account control bit flag: MNS logon user account */
    public static final int ACB_MNS = 32;
    /** Account control bit flag: Interdomain trust account */

    public static final int ACB_PWNOTREQ = 4;
    /** Account control bit flag: Temporary duplicate account */
    public static final int ACB_TEMPDUP = 8;
    /** Account control bit flag: Normal user account */
    public static final int ACB_NORMAL = 16;
    /** Account control bit flag: MNS logon user account */
    public static final int ACB_MNS = 32;
    /** Account control bit flag: Interdomain trust account */

その後、あなたの API は（仮にこうしましょう）:

* 外部開発者の顧客に請求書を送ります。
* 代金を回収します。
* API 利用者（外部開発者）に通知を送り返します。
    * これは（あなたの API から）外部開発者が提供する *外部 API* に POST リクエストを送ることで行われます（これが「コールバック」です）。

## 通常の FastAPI アプリ { #the-normal-fastapi-app }

まず、コールバックを追加する前の通常の API アプリがどうなるか見てみましょう。

`Invoice` ボディを受け取り、クエリパラメータ `callback_url` にコールバック用の URL を含める *path operation* を持ちます。

この部分はとても普通で、ほとんどのコードはすでに見覚えがあるはずです:

Ele não é criptografado, então qualquer pessoa pode recuperar as informações do seu conteúdo.

Mas ele é assinado. Assim, quando você recebe um token que você emitiu, você pode verificar que foi realmente você quem o emitiu.

Dessa forma, você pode criar um token com um prazo de expiração, digamos, de 1 semana. E então, quando o usuário voltar no dia seguinte com o token, você sabe que ele ainda está logado no seu sistema.

        }

        @ParameterizedTest
        @ValueSource(strings = { "\\server", "\\server\\share", "\\server\\share\\path", "\\server\\share\\path\\subpath\\file.txt" })
        @DisplayName("Should parse various node formats")
        void testFromReferralWithVariousNodeFormats(String node) {
            when(mockReferral.getTtl()).thenReturn(300);
            when(mockReferral.getRFlags()).thenReturn(0);

func (db *DB) MapColumns(m map[string]string) (tx *DB) {
	tx = db.getInstance()
	tx.Statement.ColumnMapping = m
	return
}

// Where add conditions
//
// See the [docs] for details on the various formats that where clauses can take. By default, where clauses chain with AND.
//
//	// Find the first user with name jinzhu
//	db.Where("name = ?", "jinzhu").First(&user)
//	// Find the first user with name jinzhu and age 20