operator.read(2, buffer, 4)
    operator.write(0, buffer, buffer.size)
    operator.read(0, buffer, 12)
    operator.read(47, buffer, 3)
    operator.read(45, buffer, 2)
    operator.read(47, buffer, 3)
    operator.read(26, buffer, 10)
    operator.read(23, buffer, 3)
    operator.write(47, buffer, buffer.size)
    operator.read(62, buffer, 6)
    operator.read(4, buffer, 19)
    operator.write(80, buffer, buffer.size)

 * <http://www.apache.org/>.
 */

package okhttp3.internal.http

// HTTP Status Codes not offered by HttpUrlConnection.
//
// https://datatracker.ietf.org/doc/html/rfc7231#page-47
//
// From https://github.com/apache/httpcomponents-core/blob/master/httpcore5/src/main/java/org/apache/hc/core5/http/HttpStatus.java

/** `100 Continue` (HTTP/1.1 - RFC 7231)  */
const val HTTP_CONTINUE = 100

```
[2020-01-01 00:00:00] >> CONNECTION 505249202a20485454502f322e300d0a0d0a534d0d0a0d0a
[2020-01-01 00:00:00] >> 0x00000000     6 SETTINGS
[2020-01-01 00:00:00] >> 0x00000000     4 WINDOW_UPDATE
[2020-01-01 00:00:00] >> 0x00000003    47 HEADERS       END_STREAM|END_HEADERS
[2020-01-01 00:00:00] << 0x00000000     6 SETTINGS
[2020-01-01 00:00:00] << 0x00000000     0 SETTINGS      ACK
[2020-01-01 00:00:00] << 0x00000000     4 WINDOW_UPDATE

                TLS Web Client Authentication
            X509v3 Basic Constraints: critical
                CA:FALSE
    Signature Algorithm: ED25519
         7e:aa:be:ed:47:4d:b9:2f:fc:ed:7f:5a:fc:6b:c0:05:5b:f5:
         a0:31:fe:86:e3:8e:3f:49:af:6d:d5:ac:c7:c4:57:47:ce:97:
         7d:ab:b8:e9:75:ec:b4:39:fb:c8:cf:53:16:5b:1f:15:b6:7f:
         5a:d1:35:2d:fc:31:3a:10:e7:0c
```

> Observe the `Subject: CN = consoleAdmin` field.

    assertThat(formEncode(43)).isEqualTo("%2B")
    assertThat(formEncode(44)).isEqualTo("%2C")
    assertThat(formEncode(45)).isEqualTo("-")
    assertThat(formEncode(46)).isEqualTo(".")
    assertThat(formEncode(47)).isEqualTo("%2F")
    assertThat(formEncode(48)).isEqualTo("0")
    assertThat(formEncode(57)).isEqualTo("9")
    assertThat(formEncode(58)).isEqualTo("%3A")
    assertThat(formEncode(59)).isEqualTo("%3B")

## Test the app

Then we can just test the app as normally.

```Python hl_lines="32-47"
{!../../../docs_src/sql_databases/sql_app/tests/test_sql_app.py!}
```

```Python hl_lines="2  6-38  41-43"
{!../../../docs_src/websockets/tutorial001.py!}
```

## ✍ `websocket`

👆 **FastAPI** 🈸, ✍ `websocket`:

```Python hl_lines="1  46-47"
{!../../../docs_src/websockets/tutorial001.py!}
```

!!! note "📡 ℹ"
    👆 💪 ⚙️ `from starlette.websockets import WebSocket`.

    **FastAPI** 🚚 🎏 `WebSocket` 🔗 🏪 👆, 👩‍💻. ✋️ ⚫️ 👟 🔗 ⚪️➡️ 💃.

```

!!! tip
    📟 `override_get_db()` 🌖 ⚫️❔ 🎏 `get_db()`, ✋️ `override_get_db()` 👥 ⚙️ `TestingSessionLocal` 🔬 💽 ↩️.

## 💯 📱

⤴️ 👥 💪 💯 📱 🛎.

```Python hl_lines="32-47"
{!../../../docs_src/sql_databases/sql_app/tests/test_sql_app.py!}
```

```Python hl_lines="2  6-38  41-43"
{!../../../docs_src/websockets/tutorial001.py!}
```

## Create a `websocket`

In your **FastAPI** application, create a `websocket`:

```Python hl_lines="1  46-47"
{!../../../docs_src/websockets/tutorial001.py!}
```

!!! note "Technical Details"
    You could also use `from starlette.websockets import WebSocket`.

```Python hl_lines="2  6-38  41-43"
{!../../../docs_src/websockets/tutorial001.py!}
```

## 创建 `websocket`

在您的 **FastAPI** 应用程序中，创建一个 `websocket`：

```Python hl_lines="1  46-47"
{!../../../docs_src/websockets/tutorial001.py!}
```

!!! note "技术细节"
    您也可以使用 `from starlette.websockets import WebSocket`。

    **FastAPI** 直接提供了相同的 `WebSocket`，只是为了方便开发人员。但它直接来自 Starlette。

## 等待消息并发送消息