url: HttpUrl,
    proxy: Proxy?,
  ) {
    fun selectProxies(): List<Proxy> {
      // If the user specifies a proxy, try that and only that.
      if (proxy != null) return listOf(proxy)

      // If the URI lacks a host (as in "http://</"), don't call the ProxySelector.
      val uri = url.toUri()
      if (uri.host == null) return immutableListOf(Proxy.NO_PROXY)

& ✍ 🛠️ 🚫 ⚙️ `async` & `await`, 👥 🔬 🔢 ⏮️ 😐 `def`:

```Python hl_lines="6-9"
{!../../../docs_src/background_tasks/tutorial001.py!}
```

## 🚮 🖥 📋

🔘 👆 *➡ 🛠️ 🔢*, 🚶‍♀️ 👆 📋 🔢 *🖥 📋* 🎚 ⏮️ 👩‍🔬 `.add_task()`:

```Python hl_lines="14"
{!../../../docs_src/background_tasks/tutorial001.py!}
```

`.add_task()` 📨 ❌:

* 📋 🔢 🏃 🖥 (`write_notification`).
* 🙆 🔁 ❌ 👈 🔜 🚶‍♀️ 📋 🔢 ✔ (`email`).

    assertThat(connection.peerSettings[Settings.MAX_CONCURRENT_STREAMS]).isEqualTo(amount)
    taskFaker.runTasks()
  }

  /** Use a helper method so there's no hidden reference remaining on the stack.  */
  private fun allocateAndLeakAllocation(
    pool: ConnectionPool,
    connection: RealConnection,
  ) {
    val client =
      OkHttpClient.Builder()
        .connectionPool(pool)
        .build()

Note that clients can actually send three types of messages - requests, ACKs of previous pushes, and NACKs of previous pushes. Unfortunately, these are not clearly distinguished in the API, so there is some logic to split these out (`shouldRespond`).

#### Pushes

また、書き込み操作では `async` と `await` を使用しないため、通常の `def` で関数を定義します。

```Python hl_lines="6-9"
{!../../../docs_src/background_tasks/tutorial001.py!}
```

## バックグラウンドタスクの追加

*path operations 関数* 内で、`.add_task()` メソッドを使用してタスク関数を *background tasks* オブジェクトに渡します。

```Python hl_lines="14"
{!../../../docs_src/background_tasks/tutorial001.py!}
```

`.add_task()` は以下の引数を受け取ります:

* バックグラウンドで実行されるタスク関数 (`write_notification`)。

 *
 * Hostnames have different requirements and use a different encoding scheme. It consists of IDNA
 * mapping and Punycode encoding.
 *
 * In order to avoid confusion and discourage phishing attacks, [IDNA Mapping][idna] transforms
 * names to avoid confusing characters. This includes basic case folding: transforming shouting
 * `SQUARE.COM` into cool and casual `square.com`. It also handles more exotic characters. For

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## Full Stack FastAPI Template - Technology Stack and Features

- ⚡ [**FastAPI**](https://fastapi.tiangolo.com) for the Python backend API.
    - 🧰 [SQLModel](https://sqlmodel.tiangolo.com) for the Python SQL database interactions (ORM).
    - 🔍 [Pydantic](https://docs.pydantic.dev), used by FastAPI, for the data validation and settings management.

 *  New: CBC-mode ECDSA cipher suites have been removed from OkHttp's default
    configuration: `TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA` and
    `TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA`. This tracks a [Chromium
    change][remove_cbc_ecdsa] to remove these cipher suites because they are
    fragile and rarely-used.
 *  New: Don't fall back to common name (CN) verification for hostnames. This

mitigate the risk in this scenario is to sandbox the model execution.

### Hardware attacks

Physical GPUs or TPUs can also be the target of attacks. [Published
research](https://scholar.google.com/scholar?q=gpu+side+channel) shows that it
might be possible to use side channel attacks on the GPU to leak data from other
running models or processes in the same system. GPUs can also have