返回 HTTP 重定向。默认情况下使用 307 状态代码（临时重定向）。

{* ../../docs_src/custom_response/tutorial006.py hl[2,9] *}

### `StreamingResponse`

采用异步生成器或普通生成器/迭代器，然后流式传输响应主体。

{* ../../docs_src/custom_response/tutorial007.py hl[2,14] *}

#### 对类似文件的对象使用 `StreamingResponse`

如果您有类似文件的对象（例如，由 `open()` 返回的对象），则可以在 `StreamingResponse` 中将其返回。

包括许多与云存储，视频处理等交互的库。

{* ../../docs_src/custom_response/tutorial008.py hl[2,10:12,14] *}

/*
 * Copyright (C) 2014 The Guava Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License

    - [Container Images](#container-images-2)
  - [Changelog since v1.22.14](#changelog-since-v12214)
  - [Changes by Kind](#changes-by-kind-1)
    - [Bug or Regression](#bug-or-regression-1)
  - [Dependencies](#dependencies-2)
    - [Added](#added-2)
    - [Changed](#changed-2)
    - [Removed](#removed-2)
- [v1.22.14](#v12214)
  - [Downloads for v1.22.14](#downloads-for-v12214)
    - [Source Code](#source-code-3)

/*
 * Copyright (C) 2014 Square, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

      incurred by, or claims asserted against, such Contributor by reason
      of your accepting any such warranty or additional liability.

   END OF TERMS AND CONDITIONS

   Copyright 2014 Docker, Inc.

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

该异常也内置了默认异常处理器。

覆盖默认异常处理器时需要导入 `RequestValidationError`，并用 `@app.excption_handler(RequestValidationError)` 装饰异常处理器。

这样，异常处理器就可以接收 `Request` 与异常。

{* ../../docs_src/handling_errors/tutorial004.py hl[2,14:16] *}

访问 `/items/foo`，可以看到默认的 JSON 错误信息：

```JSON
{
    "detail": [
        {
            "loc": [
                "path",
                "item_id"
            ],

211A          ; mapped                 ; 0071          # 1.1  DOUBLE-STRUCK CAPITAL Q
211B..211D    ; mapped                 ; 0072          # 1.1  SCRIPT CAPITAL R..DOUBLE-STRUCK CAPITAL R
211E..211F    ; valid                  ;      ; NV8    # 1.1  PRESCRIPTION TAKE..RESPONSE
2120          ; mapped                 ; 0073 006D     # 1.1  SERVICE MARK
2121          ; mapped                 ; 0074 0065 006C #1.1  TELEPHONE SIGN

/*
 * Copyright (C) 2014 Square, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

/*
 * Copyright (C) 2014 The Guava Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License

Обробник помилок отримує `Request` і саму помилку.

{* ../../docs_src/handling_errors/tutorial004.py hl[2,14:16] *}

Тепер, якщо Ви перейдете за посиланням `/items/foo`, замість того, щоб отримати стандартну JSON-помилку:

```JSON
{
    "detail": [
        {
            "loc": [
                "path",