{
  "item": "The Foo Wrestlers"
}
```

但如果客户端请求 `http://example.com/items/bar`（不存在的 `item_id` `"bar"`），则会接收到 HTTP 状态码 404（“未找到”错误）及如下 JSON 响应结果：

```JSON
{
  "detail": "Item not found"
}
```

/// tip | 提示

触发 `HTTPException` 时，可以用参数 `detail` 传递任何能转换为 JSON 的值，不仅限于 `str`。

还支持传递 `dict`、`list` 等数据结构。

**FastAPI** 能自动处理这些数据，并将之转换为 JSON。

///

## 添加自定义响应头 { #add-custom-headers }

      ubuntu_docker config
    end
  end
  'debian-8'.tap do |box|
    config.vm.define box, define_opts do |config|
      config.vm.box = 'elastic/debian-8-x86_64'
      deb_common config, box, extra: <<-SHELL
        # this sometimes gets a bad ip, and doesn't appear to be needed
        rm -f /etc/apt/sources.list.d/http_debian_net_debian.list
      SHELL
    end
  end
  'debian-9'.tap do |box|

     *
     * @param message the detail message explaining the exception
     * @param cause   the underlying cause of the exception
     */
    public SearchEngineClientException(final String message, final Throwable cause) {
        super(message, cause);
    }

    /**
     * Constructs a new SearchEngineClientException with the specified message.
     *
     * @param message the detail message explaining the exception
     */

                        "title": "HTTPValidationError",
                        "type": "object",
                        "properties": {
                            "detail": {
                                "title": "Detail",
                                "type": "array",
                                "items": {
                                    "$ref": "#/components/schemas/ValidationError"

    assert response.status_code == 401, response.text
    assert response.json() == {"detail": "Not authenticated"}


def test_incorrect_token():
    response = client.get("/items", headers={"Authorization": "Non-existent testtoken"})
    assert response.status_code == 401, response.text
    assert response.json() == {"detail": "Not authenticated"}


def test_token():

    return encoded_jwt


async def get_current_user(token: Annotated[str, Depends(oauth2_scheme)]):
    credentials_exception = HTTPException(
        status_code=status.HTTP_401_UNAUTHORIZED,
        detail="Could not validate credentials",
        headers={"WWW-Authenticate": "Bearer"},
    )
    try:
        payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
        username = payload.get("sub")

            editor.setTextContent(modelVersionElement, targetModelVersion);
            context.detail("Updated modelVersion to " + targetModelVersion);
        } else {
            // Create new modelVersion element if it doesn't exist
            DomUtils.insertContentElement(root, MODEL_VERSION, targetModelVersion);
            context.detail("Added modelVersion " + targetModelVersion);
        }

    axes:
      - axis:
          type: label-expression
          name: os
          values:
            - centos-7-packaging
            - centos-8-packaging
            - debian-9-packaging
            - debian-10-packaging
            - debian-11-packaging
            - opensuse-15-1-packaging
            - oraclelinux-7-packaging
            - oraclelinux-8-packaging
            - sles-12-packaging

class CustomError(Exception):
    pass


def catching_dep() -> Any:
    try:
        yield "s"
    except CustomError as err:
        raise HTTPException(status_code=418, detail="Session error") from err


def broken_dep() -> Any:
    yield "s"
    raise ValueError("Broken after yield")


app = FastAPI()


@app.get("/catching")

@app.put("/invalid-user/{user_id}")
def put_invalid_user(
    user_id: str, name: str = Body(), db: dict = Depends(get_database)
):
    db[user_id] = name
    raise HTTPException(status_code=400, detail="Invalid user")


@app.put("/user/{user_id}")
def put_user(user_id: str, name: str = Body(), db: dict = Depends(get_database)):
    db[user_id] = name
    return {"message": "OK"}