- Improved scheduling performance when many nodes, and prefilter returns 1-2 nodes (e.g. daemonset)
  
  For developers of out-of-tree PostFilter plugins, note that the semantics of NodeToStatusMap are changing: A node with an absent value in the NodeToStatusMap should be interpreted as having an UnschedulableAndUnresolvable status ([#125307](https://github.com/kubernetes/kubernetes/pull/125307), [@gabesaba](https://github.com/gabesaba)) [SIG Scheduling]

- Improved scheduling performance when many nodes, and prefilter returns 1-2 nodes (e.g. daemonset)
  
  For developers of out-of-tree PostFilter plugins, note that the semantics of NodeToStatusMap are changing: A node with an absent value in the NodeToStatusMap should be interpreted as having an UnschedulableAndUnresolvable status ([#125309](https://github.com/kubernetes/kubernetes/pull/125309), [@gabesaba](https://github.com/gabesaba)) [SIG Scheduling]

- Improved scheduling performance when many nodes, and prefilter returns 1-2 nodes (e.g. daemonset)
  
  For developers of out-of-tree PostFilter plugins, note that the semantics of NodeToStatusMap are changing: A node with an absent value in the NodeToStatusMap should be interpreted as having an UnschedulableAndUnresolvable status ([#125308](https://github.com/kubernetes/kubernetes/pull/125308), [@gabesaba](https://github.com/gabesaba)) [SIG Scheduling]

    assertThat(Enums.getIfPresent(TestEnum.class, "cHEETO")).isAbsent();
    assertThat(Enums.getIfPresent(TestEnum.class, "Honda")).isAbsent();
    assertThat(Enums.getIfPresent(TestEnum.class, "poodlE")).isAbsent();
  }

  public void testGetIfPresent_whenNoMatchingConstant() {
    assertThat(Enums.getIfPresent(TestEnum.class, "WOMBAT")).isAbsent();
  }


  @J2ktIncompatible

# Événements envoyés par le serveur (SSE) { #server-sent-events-sse }

Vous pouvez diffuser des données vers le client en utilisant les **Server-Sent Events** (SSE).

C'est similaire à [Diffuser des JSON Lines](stream-json-lines.md), mais cela utilise le format `text/event-stream`, pris en charge nativement par les navigateurs via l’API [`EventSource`](https://developer.mozilla.org/en-US/docs/Web/API/EventSource).

/// info | Info

Ajouté dans FastAPI 0.135.0.

Ви можете транслювати дані клієнту за допомогою **Server-Sent Events** (SSE).

Це подібно до [Потік JSON Lines](stream-json-lines.md), але використовує формат `text/event-stream`, який нативно підтримується браузерами через [API `EventSource`](https://developer.mozilla.org/en-US/docs/Web/API/EventSource).

/// info | Інформація

Додано у FastAPI 0.135.0.

///

# 服务器发送事件（SSE） { #server-sent-events-sse }

你可以使用**服务器发送事件**（SSE）向客户端流式发送数据。

这类似于[流式传输 JSON Lines](stream-json-lines.md)，但使用 `text/event-stream` 格式，浏览器原生通过 [`EventSource` API](https://developer.mozilla.org/en-US/docs/Web/API/EventSource) 支持。

/// info | 信息

新增于 FastAPI 0.135.0。

///

## 什么是服务器发送事件？ { #what-are-server-sent-events }

SSE 是一种通过 HTTP 从服务器向客户端流式传输数据的标准。

每个事件是一个带有 `data`、`event`、`id` 和 `retry` 等“字段”的小文本块，以空行分隔。

# Server-Sent Events (SSE) { #server-sent-events-sse }

Sie können Daten mithilfe von **Server-Sent Events** (SSE) an den Client streamen.

Das ist ähnlich wie [JSON Lines streamen](stream-json-lines.md), verwendet aber das Format `text/event-stream`, das von Browsern nativ mit der [die `EventSource`-API](https://developer.mozilla.org/en-US/docs/Web/API/EventSource) unterstützt wird.

/// info | Info

Hinzugefügt in FastAPI 0.135.0.

///

# Eventos Enviados pelo Servidor (SSE) { #server-sent-events-sse }

Você pode transmitir dados para o cliente usando Server-Sent Events (SSE).

Isso é semelhante a [Stream de JSON Lines](stream-json-lines.md), mas usa o formato `text/event-stream`, que é suportado nativamente pelos navegadores com a [`EventSource` API](https://developer.mozilla.org/en-US/docs/Web/API/EventSource).

/// info | Informação

Adicionado no FastAPI 0.135.0.

///

# Server-Sent Events (SSE) { #server-sent-events-sse }

Puedes enviar datos en streaming al cliente usando **Server-Sent Events** (SSE).

Esto es similar a [Stream JSON Lines](stream-json-lines.md), pero usa el formato `text/event-stream`, que los navegadores soportan de forma nativa con la [`EventSource` API](https://developer.mozilla.org/en-US/docs/Web/API/EventSource).

/// info | Información

Añadido en FastAPI 0.135.0.

///