import jcifs.SmbTransport;
import jcifs.internal.CommonServerMessageBlock;

/**
 * Handles failover and recovery for multi-channel connections
 */
public class ChannelFailover {

    private static final Logger log = LoggerFactory.getLogger(ChannelFailover.class);

    private final ChannelManager manager;
    private final ExecutorService executor;
    private final ConcurrentMap<String, FailoverState> failoverStates;

{* ../../docs_src/app_testing/tutorial002_py39.py hl[27:31] *}

/// note | Nota

Para más detalles, revisa la documentación de Starlette sobre <a href="https://www.starlette.dev/testclient/#testing-websocket-sessions" class="external-link" target="_blank">probar WebSockets</a>.

from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    description: str | None = None
    price: float
    tax: float | None = None
    tags: list[str] = []


@app.post("/items/")
async def create_item(item: Item) -> Item:
    return item


@app.get("/items/")
async def read_items() -> list[Item]:
    return [

from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    description: str | None = None
    price: float
    tax: float | None = None

    model_config = {
        "json_schema_extra": {
            "examples": [
                {
                    "name": "Foo",
                    "description": "A very nice Item",
                    "price": 35.4,

from datetime import datetime
from typing import Union

from pydantic import BaseModel


class User(BaseModel):
    id: int
    name: str = "John Doe"
    signup_ts: Union[datetime, None] = None
    friends: list[int] = []


external_data = {
    "id": "123",
    "signup_ts": "2017-06-01 12:22",
    "friends": [1, "2", b"3"],
}
user = User(**external_data)
print(user)

上記のスクリーンショットは<a href="https://code.visualstudio.com" class="external-link" target="_blank">Visual Studio Code</a>を撮ったものです。

しかし、<a href="https://www.jetbrains.com/pycharm/" class="external-link" target="_blank">PyCharm</a>やほとんどのPythonエディタでも同様なエディターサポートを受けられます:

<img src="/img/tutorial/body/image05.png">

/// tip | 豆知識

令牌于一周后过期，届时，用户身份验证就会失败。只有再次登录，才能获得新的令牌。如果用户（或第三方）篡改令牌的过期时间，因为签名不匹配会导致身份验证失败。

如需深入了解 JWT 令牌，了解它的工作方式，请参阅 <a href="https://jwt.io/" class="external-link" target="_blank">https://jwt.io</a>。

## 安装 `PyJWT`

安装 `PyJWT`，在 Python 中生成和校验 JWT 令牌：

<div class="termy">

```console
$ pip install pyjwt

---> 100%
```

</div>

/// info | 说明

import java.util.logging.Level;

/**
 * Adapter that uses java.util.logging loggers.
 *
 * @author koichik
 */
class JulLoggerAdapter implements LoggerAdapter {

    protected final String sourceClass;

    protected final java.util.logging.Logger logger;

    public JulLoggerAdapter(final Class<?> clazz) {
        sourceClass = clazz.getName();
        logger = java.util.logging.Logger.getLogger(clazz.getName());
    }

import org.junit.Test
import org.junit.runner.RunWith
import org.robolectric.ParameterizedRobolectricTestRunner
import org.robolectric.ParameterizedRobolectricTestRunner.Parameters

@RunWith(ParameterizedRobolectricTestRunner::class)
class AndroidSocketAdapterTest(
  val adapter: SocketAdapter,
) {
  val context: SSLContext by lazy {
    val provider: Provider = Conscrypt.newProviderBuilder().provideTrustManager(true).build()

import org.codelibs.fess.suggest.entity.SuggestItem;
import org.codelibs.fess.suggest.request.Response;

/**
 * Represents a response for a suggest request.
 * This class holds the details of the response including the index, time taken, words, total count, and suggested items.
 */
public class SuggestResponse implements Response {
    /** The index name. */
    protected final String index;

    /** The time taken in milliseconds. */