},
                },
                "Token": {
                    "title": "Token",
                    "required": ["access_token", "token_type"],
                    "type": "object",
                    "properties": {
                        "access_token": {"title": "Access Token", "type": "string"},
                        "token_type": {"title": "Token Type", "type": "string"},
                    },

                    },
                },
                "Token": {
                    "title": "Token",
                    "required": ["access_token", "token_type"],
                    "type": "object",
                    "properties": {
                        "access_token": {"title": "Access Token", "type": "string"},
                        "token_type": {"title": "Token Type", "type": "string"},
                    },

// license that can be found in the LICENSE file.

//go:build !compiler_bootstrap

package main

import (
	"go/ast"
	"go/token"
)

func (f *File) walkUnexpected(x interface{}, context astContext, visit func(*File, interface{}, astContext)) {
	switch n := x.(type) {
	default:
		error_(token.NoPos, "unexpected type %T in walk", x)
		panic("unexpected type")

	case *ast.IndexListExpr:
		f.walk(&n.X, ctxExpr, visit)

    }

    public String getAccessTokenFromRequest(final HttpServletRequest request) {
        final String token = request.getHeader("Authorization");
        if (token != null) {
            final String[] values = token.trim().split(" ");
            if (values.length == 2 && BEARER.equals(values[0])) {
                return values[1];
            }

		connOpts = append(connOpts, nats.UserInfo(n.Username, n.Password))
	}
	if n.UserCredentials != "" {
		connOpts = append(connOpts, nats.UserCredentials(n.UserCredentials))
	}
	if n.Token != "" {
		connOpts = append(connOpts, nats.Token(n.Token))
	}
	if n.Secure || n.TLS && n.TLSSkipVerify {
		connOpts = append(connOpts, nats.Secure(nil))
	} else if n.TLS {
		connOpts = append(connOpts, nats.Secure(&tls.Config{RootCAs: n.RootCAs}))

):
    if current_user.disabled:
        raise HTTPException(status_code=400, detail="Inactive user")
    return current_user


@app.post("/token")
async def login_for_access_token(
    form_data: OAuth2PasswordRequestForm = Depends(),
) -> Token:
    user = authenticate_user(fake_users_db, form_data.username, form_data.password)
    if not user:

///

## Den Token zurückgeben

Die Response des `token`-Endpunkts muss ein JSON-Objekt sein.

Es sollte einen `token_type` haben. Da wir in unserem Fall „Bearer“-Token verwenden, sollte der Token-Typ "`bearer`" sein.

Und es sollte einen `access_token` haben, mit einem String, der unseren Zugriffstoken enthält.

///

```Python hl_lines="9"
{!> ../../docs_src/header_params/tutorial003.py!}
```

////

与*路径操作*通信时，以下面的方式发送两个 HTTP 请求头：

```
X-Token: foo
X-Token: bar
```

响应结果是：

```JSON
{
    "X-Token values": [
        "bar",
        "foo"
    ]
}
```

## 小结

使用 `Header` 声明请求头的方式与 `Query`、`Path` 、`Cookie` 相同。

        env:
          GITHUB_CONTEXT: ${{ toJson(github) }}
        run: echo "$GITHUB_CONTEXT"
      - uses: actions/checkout@v4
        with:
          # To allow latest-changes to commit to the main branch
          token: ${{ secrets.FASTAPI_LATEST_CHANGES }}
      # Allow debugging with tmate
      - name: Setup tmate session
        uses: mxschmitt/action-tmate@v3

client = TestClient(app)


def test_login():
    response = client.post("/token", data={"username": "johndoe", "password": "secret"})
    assert response.status_code == 200, response.text
    assert response.json() == {"access_token": "johndoe", "token_type": "bearer"}


def test_login_incorrect_password():
    response = client.post(
        "/token", data={"username": "johndoe", "password": "incorrect"}
    )