# OpenAPI Webhooks { #openapi-webhooks }

Es gibt Fälle, in denen Sie Ihren API-**Benutzern** mitteilen möchten, dass Ihre App *deren* App mit einigen Daten aufrufen (einen <abbr title="Request – Anfrage: Daten, die der Client zum Server sendet">Request</abbr> senden) könnte, normalerweise um über ein bestimmtes **Event** zu **benachrichtigen**.

across multiple computational devices, including multicore CPUs, general purpose GPUs, and custom-designed ASICs known as Tensor Processing Units (TPUs). This architecture gives flexibility to the application developer, whereas in previous “parameter server” designs the management of shared state is built into the system, TensorFlow enables developers to experiment with novel optimizations and training algorithms. TensorFlow supports a variety of applications, with a focus on training and inference on...

/// tip | Tipp

Im nächsten Kapitel erfahren Sie, welche anderen „Dinge“, außer Funktionen, Sie als Abhängigkeiten verwenden können.

///

Immer wenn ein neuer <abbr title="Request – Anfrage: Daten, die der Client zum Server sendet">Request</abbr> eintrifft, kümmert sich **FastAPI** darum:

* Ihre Abhängigkeitsfunktion („Dependable“) mit den richtigen Parametern aufzurufen.
* Sich das Ergebnis von dieser Funktion zu holen.

 * or more contributor license agreements. Licensed under the Elastic License
 * 2.0 and the Server Side Public License, v 1; you may not use this file except
 * in compliance with, at your election, the Elastic License 2.0 or the Server
 * Side Public License, v 1.
 */

package org.elasticsearch.gradle.internal.doc

import com.fasterxml.jackson.core.JsonFactory;

* Móvil

* obsoleto
* diseñado
* inválido
* sobre la marcha
* estándar
* por defecto
* sensible a mayúsculas/minúsculas
* insensible a mayúsculas/minúsculas

* servir la aplicación
* servir la página

* la app
* la aplicación

* la request
* la response
* la response de error

* la path operation
* el decorador de path operation
* la path operation function

* <abbr title="less than - inférieur à"><code>lt</code></abbr>
* <abbr title="XML Web Token - Jeton Web XML">XWT</abbr>
* <abbr title="Parallel Server Gateway Interface - Interface passerelle serveur parallèle">PSGI</abbr>

### L’abbr donne une expression complète et une explication { #the-abbr-gives-a-full-phrase-and-an-explanation }

import okhttp3.Request

class PerCallSettings {
  private val client = OkHttpClient()

  fun run() {
    val request =
      Request
        .Builder()
        .url("http://httpbin.org/delay/1") // This URL is served with a 1 second delay.
        .build()

    // Copy to customize OkHttp for this request.
    val client1 =
      client
        .newBuilder()
        .readTimeout(500, TimeUnit.MILLISECONDS)
        .build()

 * when appropriate and {@link #awaitHealthy} will still work as expected.
 *
 * <p>Here is a simple example of how to use a {@code ServiceManager} to start a server.
 *
 * {@snippet :
 * class Server {
 *   public static void main(String[] args) {
 *     Set<Service> services = ...;
 *     ServiceManager manager = new ServiceManager(services);
 *     manager.addListener(new Listener() {

---

現在我們知道「行程」與「程式」的差異了，繼續談部署。

## 開機自動執行 { #running-on-startup }

多數情況下，當你建立一個 Web API，你會希望它「一直在執行」，不中斷，讓客戶端隨時可用。除非你有特定理由只在某些情況下才執行，但大部分時候你會希望它持續運作並且可用。

### 在遠端伺服器上 { #in-a-remote-server }

當你設定一台遠端伺服器（雲端伺服器、虛擬機等），最簡單的作法就是像本機開發時一樣，手動使用 `fastapi run`（它使用 Uvicorn）或類似的方式。

這在「開發期間」會運作良好而且有用。

但如果你與伺服器的連線中斷，正在執行的行程很可能會死掉。

而如果伺服器被重新啟動（例如更新後、或雲端供應商進行遷移），你大概「不會注意到」。因此你甚至不知道要手動重啟行程。你的 API 就會一直掛著。😱

	// return 503 server closed error, consider it as an offline node
	case strings.Contains(err.Error(), http.ErrServerClosed.Error()):
		return true
	// Corner case, the server closed the connection with a keep-alive timeout
	// some requests are not retried internally, such as POST request with written body
	case strings.Contains(err.Error(), "server closed idle connection"):
		return true
	}