///

## 创建中间件

要创建中间件你可以在函数的顶部使用装饰器 `@app.middleware("http")`.

中间件参数接收如下参数:

* `request`.
* 一个函数 `call_next` 它将接收 `request` 作为参数.
    * 这个函数将 `request` 传递给相应的 *路径操作*.
    * 然后它将返回由相应的*路径操作*生成的 `response`.
* 然后你可以在返回 `response` 前进一步修改它.

```Python hl_lines="8-9  11  14"
{!../../docs_src/middleware/tutorial001.py!}
```

/// tip

<div class="termy">

```console
$ fastapi dev main.py

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

Open your browser at <a href="http://127.0.0.1:8000" class="external-link" target="_blank">http://127.0.0.1:8000</a>.

You will see a simple page like:

<img src="/img/tutorial/websockets/image01.png">

// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package logger

import (
	"context"
	"errors"
	"fmt"
	"net/http"
	"regexp"
	"runtime"

	"github.com/minio/minio/internal/color"
)

var ansiRE = regexp.MustCompile("(\x1b[^m]*m)")

// Print ANSI Control escape

```

////

//// tab | 🐍 3️⃣.1️⃣0️⃣ & 🔛

```Python hl_lines="7"
{!> ../../docs_src/query_params_str_validations/tutorial011_py310.py!}
```

////

⤴️, ⏮️ 📛 💖:

```
http://localhost:8000/items/?q=foo&q=bar
```

👆 🔜 📨 💗 `q` *🔢 🔢'* 💲 (`foo` & `bar`) 🐍 `list` 🔘 👆 *➡ 🛠️ 🔢*, *🔢 🔢* `q`.

, 📨 👈 📛 🔜:

```JSON
{
  "q": [
    "foo",
    "bar"

import java.util.Date
import java.util.concurrent.TimeUnit.SECONDS
import okhttp3.Request
import okhttp3.Response
import okhttp3.internal.http.HTTP_PERM_REDIRECT
import okhttp3.internal.http.HTTP_TEMP_REDIRECT
import okhttp3.internal.http.toHttpDateOrNull
import okhttp3.internal.toNonNegativeInt

/**
 * Given a request and cached response, this figures out whether to use the network, the cache, or
 * both.

# Body - Обновления

## Полное обновление с помощью `PUT`

Для полного обновления элемента можно воспользоваться операцией <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/PUT" class="external-link" target="_blank">HTTP `PUT`</a>.

Вы можете использовать функцию `jsonable_encoder` для преобразования входных данных в JSON, так как нередки случаи, когда работать можно только с простыми типами данных (например, для хранения в NoSQL-базе данных).

 *
 * 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,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,

/** 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
 */

 * Copyright (C) 2008 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 is distributed on an "AS IS" BASIS,

	query.Set(xhttp.AmzSignedHeaders, strings.Join(pSignValues.SignedHeaders, ";"))
	query.Set(xhttp.AmzCredential, cred.AccessKey+SlashSeparator+pSignValues.Credential.getScope())

	defaultSigParams := set.CreateStringSet(
		xhttp.AmzContentSha256,
		xhttp.AmzSecurityToken,
		xhttp.AmzAlgorithm,
		xhttp.AmzDate,
		xhttp.AmzExpires,
		xhttp.AmzSignedHeaders,
		xhttp.AmzCredential,
		xhttp.AmzSignature,
	)