## Pin your `fastapi` version { #pin-your-fastapi-version }

The first thing you should do is to "pin" the version of **FastAPI** you are using to the specific latest version that you know works correctly for your application.

    assertFalse(pin.matchesHostname("www.example.com"))
  }

  @Test fun testMatchesSha256() {
    val pin = Pin("example.com", certA1Sha256Pin)
    assertTrue(pin.matchesCertificate(certA1.certificate))
    assertFalse(pin.matchesCertificate(certB1.certificate))
  }

  @Test fun testMatchesSha1() {
    val pin = Pin("example.com", certC1Sha1Pin)
    assertTrue(pin.matchesCertificate(certC1.certificate))

      when {
        pin.startsWith("sha1/") -> {
          this.hashAlgorithm = "sha1"
          this.hash = pin.substring("sha1/".length).decodeBase64() ?: throw IllegalArgumentException("Invalid pin hash: $pin")
        }

        pin.startsWith("sha256/") -> {
          this.hashAlgorithm = "sha256"

      for (Certificate certificate : chain.connection().handshake().peerCertificates()) {
        String pin = CertificatePinner.pin(certificate);
        if (denylist.contains(pin)) {
          throw new IOException("Denylisted peer certificate: " + pin);
        }
      }
      return chain.proceed(chain.request());
    }
  };

  private final OkHttpClient client = new OkHttpClient.Builder()

import mockwebserver3.MockWebServer
import mockwebserver3.SocketEffect.ShutdownConnection
import mockwebserver3.junit5.StartStop
import okhttp3.CertificatePinner
import okhttp3.CertificatePinner.Companion.pin
import okhttp3.OkHttpClientTestRule
import okhttp3.RecordingHostnameVerifier
import okhttp3.Request
import okhttp3.internal.platform.Platform.Companion.get
import okhttp3.testing.PlatformRule

지금 바로 **FastAPI**로 프로덕션 애플리케이션을 만들 수 있습니다(그리고 아마도 한동안 그렇게 해오셨을 것입니다). 다만 나머지 코드와 함께 올바르게 동작하는 버전을 사용하고 있는지 확인하기만 하면 됩니다.

## `fastapi` 버전을 고정하기 { #pin-your-fastapi-version }

가장 먼저 해야 할 일은 여러분의 애플리케이션에서 올바르게 동작하는 것으로 알고 있는 **FastAPI**의 최신 구체 버전에 맞춰 사용 중인 버전을 "고정(pin)"하는 것입니다.

예를 들어, 앱에서 `0.112.0` 버전을 사용하고 있다고 가정해 보겠습니다.

`requirements.txt` 파일을 사용한다면 다음과 같이 버전을 지정할 수 있습니다:

```txt
fastapi[standard]==0.112.0
```

auditwheel >= 6.1.0
# Install tensorboard, and keras
# Note that here we want the latest version that matches TF major.minor version
# Note that we must use nightly here as these are used in nightly jobs
# For release jobs, we will pin these on the release branch
keras-nightly ~= 3.12.0.dev
tb-nightly ~= 2.20.0.a
# For new protobuf, if V.x.y is gencode version, then runtime version U must be
# V <= U <= V+1

auditwheel >= 6.1.0
# Install tensorboard, and keras
# Note that here we want the latest version that matches TF major.minor version
# Note that we must use nightly here as these are used in nightly jobs
# For release jobs, we will pin these on the release branch
keras-nightly ~= 3.12.0.dev
tb-nightly ~= 2.20.0.a
# For new protobuf, if V.x.y is gencode version, then runtime version U must be
# V <= U <= V+1

margin:0;border:0}legend{display:block;width:100%;max-width:100%;padding:0;margin-bottom:.5rem;font-size:1.5rem;line-height:inherit;color:inherit;white-space:normal}progress{vertical-align:baseline}[type=number]::-webkit-inner-spin-button,[type=number]::-webkit-outer-spin-button{height:auto}[type=search]{outline-offset:-2px;-webkit-appearance:none}[type=search]::-webkit-search-decoration{-webkit-appearance:none}::-webkit-file-upload-button{font:inherit;-webkit-appearance:button}output{display:in...

這就是為什麼目前版本仍為 `0.x.x`，這表示每個版本都可能包含破壞性變更。這遵循 [語意化版本（Semantic Versioning）](https://semver.org/) 的慣例。

你現在就可以用 **FastAPI** 建置生產環境的應用（而且你可能已經這麼做一段時間了），只要確保你使用的版本能與其餘程式碼正確相容。

## 鎖定你的 `fastapi` 版本 { #pin-your-fastapi-version }

首先，你應該將你使用的 **FastAPI** 版本「鎖定（pin）」到你知道對你的應用可正常運作的最新特定版本。

例如，假設你的應用使用 `0.112.0` 版本。

如果你使用 `requirements.txt` 檔案，可以這樣指定版本：

```txt
fastapi[standard]==0.112.0
```

這表示你會使用完全相同的 `0.112.0` 版本。