* The **input model** needs to be able to have a password.
* The **output model** should not have a password.
* The **database model** would probably need to have a hashed password.

!!! danger
    Never store user's plaintext passwords. Always store a "secure hash" that you can then verify.

In particular, this may be a good alternative to logic in a middleware.

For example, if you want to read or manipulate the request body before it is processed by your application.

!!! danger
    This is an "advanced" feature.

    If you are just starting with **FastAPI** you might want to skip this section.

## Use cases

Some use cases include:

# 🛃 📨 & APIRoute 🎓

💼, 👆 5️⃣📆 💚 🔐 ⚛ ⚙️ `Request` & `APIRoute` 🎓.

🎯, 👉 5️⃣📆 👍 🎛 ⚛ 🛠️.

🖼, 🚥 👆 💚 ✍ ⚖️ 🔬 📨 💪 ⏭ ⚫️ 🛠️ 👆 🈸.

!!! danger
    👉 "🏧" ⚒.

    🚥 👆 ▶️ ⏮️ **FastAPI** 👆 💪 💚 🚶 👉 📄.

## ⚙️ 💼

⚙️ 💼 🔌:

* 🏭 🚫-🎻 📨 💪 🎻 (✅ <a href="https://msgpack.org/index.html" class="external-link" target="_blank">`msgpack`</a>).
* 🗜 🗜-🗜 📨 💪.
* 🔁 🚨 🌐 📨 💪.

```

이제 브라우저가 비밀번호로 사용자를 만들 때마다 API는 응답으로 동일한 비밀번호를 반환합니다.

이 경우, 사용자가 스스로 비밀번호를 발신했기 때문에 문제가 되지 않을 수 있습니다.

그러나 동일한 모델을 다른 *경로 작동*에서 사용할 경우, 모든 클라이언트에게 사용자의 비밀번호를 발신할 수 있습니다.

!!! danger "위험"
    절대로 사용자의 평문 비밀번호를 저장하거나 응답으로 발신하지 마십시오.

## 출력 모델 추가

대신 평문 비밀번호로 입력 모델을 만들고 해당 비밀번호 없이 출력 모델을 만들 수 있습니다:

```Python hl_lines="9  11  16"
{!../../../docs_src/response_model/tutorial003.py!}
```

### Cluster-writeable probe

The reply is '200 OK' if cluster has write quorum if not it returns '503 Service Unavailable'.

```
curl http://minio1:9001/minio/health/cluster
HTTP/1.1 503 Service Unavailable
Accept-Ranges: bytes
Content-Length: 0
Server: MinIO
Vary: Origin
X-Amz-Bucket-Region: us-east-1
X-Minio-Write-Quorum: 3
X-Amz-Request-Id: 16239D6AB80EBECF
X-Xss-Protection: 1; mode=block
Date: Tue, 21 Jul 2020 00:36:14 GMT

Default port '8021' can be changed via

```
--ftp="address=:3021"
```

### Change FTP passive port range

By default FTP requests OS to give a free port automatically, however you may want to restrict
this to specific ports in certain restricted environments via

```
--ftp="passive-port-range=30000-40000"
```

### Change default SFTP port

Default port '8022' can be changed via

```

plugins {
  kotlin("jvm")
  id("org.jetbrains.dokka")
  id("com.vanniktech.maven.publish.base")
  id("binary-compatibility-validator")
}

project.applyOsgi(
  "Fragment-Host: com.squareup.okhttp3; bundle-version=\"\${range;[==,+);\${version_cleanup;${projects.okhttp.version}}}\"",
  "Automatic-Module-Name: okhttp3.urlconnection",
  "Bundle-SymbolicName: com.squareup.okhttp3.urlconnection",
  "-removeheaders: Private-Package"
)

ENV MINIO_ACCESS_KEY_FILE=access_key \
    MINIO_SECRET_KEY_FILE=secret_key \
    MINIO_ROOT_USER_FILE=access_key \
    MINIO_ROOT_PASSWORD_FILE=secret_key \
    MINIO_KMS_SECRET_KEY_FILE=kms_master_key \

# 自定义请求与 APIRoute 类

有时，我们要覆盖 `Request` 与 `APIRoute` 类使用的逻辑。

尤其是中间件里的逻辑。

例如，在应用处理请求体前，预先读取或操控请求体。

!!! danger "危险"

    本章内容**较难**。

    **FastAPI** 新手可跳过本章。

## 用例

常见用例如下：

* 把 <a href="https://msgpack.org/index.html" class="external-link" target="_blank">`msgpack`</a> 等非 JSON 请求体转换为 JSON
* 解压 gzip 压缩的请求体
* 自动记录所有请求体的日志

## 处理自定义请求体编码

下面学习如何使用自定义 `Request` 子类压缩 gizp 请求。

 * All comments are ignored.
 *
 * Regular lines contain fields separated by semicolons.
 *
 * The first element on each line is a single hex code point (like 0041) or a hex code point range
 * (like 0030..0039).
 *
 * The second element on each line is a mapping type, like `valid` or `mapped`.
 *
 * For lines that contain a mapping target, the next thing is a sequence of hex code points (like