更多细节查看 <a href="https://www.starlette.io/background/" class="external-link" target="_blank">Starlette's official docs for Background Tasks</a>.

## 告诫

如果您需要执行繁重的后台计算，并且不一定需要由同一进程运行（例如，您不需要共享内存、变量等），那么使用其他更大的工具（如 <a href="https://docs.celeryq.dev" class="external-link" target="_blank">Celery</a>）可能更好。

它们往往需要更复杂的配置，即消息/作业队列管理器，如RabbitMQ或Redis，但它们允许您在多个进程中运行后台任务，甚至是在多个服务器中。

# CORS (Cross-Origin Resource Sharing)

<a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS" class="external-link" target="_blank">CORS or "Cross-Origin Resource Sharing"</a> refers to the situations when a frontend running in a browser has JavaScript code that communicates with a backend, and the backend is in a different "origin" than the frontend.

## Origin

## ❎ `python-jose`

👥 💪 ❎ `python-jose` 🏗 & ✔ 🥙 🤝 🐍:

<div class="termy">

```console
$ pip install "python-jose[cryptography]"

---> 100%
```

</div>

<a href="https://github.com/mpdavis/python-jose" class="external-link" target="_blank">🐍-🇩🇬</a> 🚚 🔐 👩‍💻 ➕.

import static java.lang.annotation.RetentionPolicy.RUNTIME;

import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;

import jakarta.validation.Constraint;
import jakarta.validation.Payload;

@Target({ METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER })
@Retention(RUNTIME)
@Documented
@Constraint(validatedBy = CronExpressionValidator.class)

diesem Grund sind die aktuellen Versionen immer noch `0.x.x`, was darauf hindeutet, dass jede Version möglicherweise nicht abwärtskompatible Änderungen haben könnte. Dies folgt den Konventionen der <a href="https://semver.org/" class="external-link" target="_blank">semantischen Versionierung</a>.

Sie können jetzt Produktionsanwendungen mit **FastAPI** erstellen (und das tun Sie wahrscheinlich schon seit einiger Zeit), Sie müssen nur sicherstellen, dass Sie eine Version verwenden, die korrekt...

        if (StringUtil.isBlank(text)) {
            return null;
        }
        final String target = getDetectText(text);
        final LanguageResult result = detector.detect(target);
        if (logger.isDebugEnabled()) {
            logger.debug("detected lang:{}({}) from {}", result, result.getRawScore(), target);
        }
        return getSupportedLanguage(result.getLanguage());
    }

        return backingMap.getEntry(entryIndex);
      }
    };
  }

  /** Allocation-free implementation of {@code target.addAll(this)}. */
  void addTo(Multiset<? super E> target) {
    checkNotNull(target);
    for (int i = backingMap.firstIndex(); i >= 0; i = backingMap.nextIndex(i)) {
      target.add(backingMap.getKey(i), backingMap.getValue(i));
    }
  }

  @Override
  final int distinctElements() {

    * 🚥 👆 📣 🔗 🎯 *➡ 🛠️*, **👫 🔜 🛠️ 💁‍♂️**.
    * 📻 🔗 🛠️ 🥇, ⤴️ [`dependencies` 👨‍🎨](dependencies/dependencies-in-path-operation-decorators.md){.internal-link target=_blank}, & ⤴️ 😐 🔢 🔗.
    * 👆 💪 🚮 [`Security` 🔗 ⏮️ `scopes`](../advanced/security/oauth2-scopes.md){.internal-link target=_blank}.

/// tip

✔️ `dependencies` `APIRouter` 💪 ⚙️, 🖼, 🚚 🤝 🎂 👪 *➡ 🛠️*. 🚥 🔗 🚫 🚮 📦 🔠 1️⃣ 👫.

///

/// check

import static java.lang.annotation.ElementType.TYPE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

import com.google.common.annotations.GwtCompatible;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import javax.annotation.Nonnull;
import javax.annotation.meta.TypeQualifierDefault;

/**
 * Marks all "top-level" types as non-null in a way that is recognized by Kotlin. Note that this

import static java.lang.annotation.ElementType.TYPE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

import com.google.common.annotations.GwtCompatible;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import javax.annotation.Nonnull;
import javax.annotation.meta.TypeQualifierDefault;

/**
 * Marks all "top-level" types as non-null in a way that is recognized by Kotlin. Note that this