### Choosing between application and network interceptors

Each interceptor chain has relative merits.

**Application interceptors**

 * Don't need to worry about intermediate responses like redirects and retries.
 * Are always invoked once, even if the HTTP response is served from the cache.

The normal (default) process, is as follows.

A `FastAPI` application (instance) has an `.openapi()` method that is expected to return the OpenAPI schema.

As part of the application object creation, a *path operation* for `/openapi.json` (or for whatever you set your `openapi_url`) is registered.

It just returns a JSON response with the result of the application's `.openapi()` method.

### Threads

#### Application's calling thread

The application-layer must block on writing I/O. We can't return from a write until we've pushed its bytes onto the socket. Otherwise, if the write fails we are unable to deliver its IOException to the application. We would have told the application layer that the write succeeded, but it didn't!

    * Additionally, LiteRT code base will decouple from TensorFlow repository, and `tf.lite` will be removed in future TensorFlow Python package. More details to follow in future release notes.

# Déployer FastAPI sur des fournisseurs cloud { #deploy-fastapi-on-cloud-providers }

Vous pouvez utiliser pratiquement n'importe quel fournisseur cloud pour déployer votre application FastAPI.

Dans la plupart des cas, les principaux fournisseurs cloud proposent des guides pour déployer FastAPI avec leurs services.

## FastAPI Cloud { #fastapi-cloud }

**[FastAPI Cloud](https://fastapicloud.com)** est créée par le même auteur et l'équipe à l'origine de **FastAPI**.

        final FessConfig fessConfig = createFessConfigWithResponseHeaders("*=X-Def:def\napplication/json=X-Json:jsonval");
        FessActionAdjustmentProvider provider = new FessActionAdjustmentProvider(fessConfig);
        final Map<String, String> headerMap = new HashMap<>();
        provider.adjustActionResponseHeaders("application/json", (k, v) -> headerMap.put(k, v));
        assertEquals(2, headerMap.size());

     <span style="background-color:#007166"><font color="#D3D7CF"> INFO </font></span>  Waiting for application startup.
     <span style="background-color:#007166"><font color="#D3D7CF"> INFO </font></span>  Waiting for application startup.
     <span style="background-color:#007166"><font color="#D3D7CF"> INFO </font></span>  Waiting for application startup.

          package="okhttp.okhttp3">

  <uses-permission android:name="android.permission.INTERNET"/>

  <application>
    <provider
      android:name="androidx.startup.InitializationProvider"
      android:authorities="${applicationId}.androidx-startup"
      android:exported="false"
      tools:node="merge">
      <meta-data android:name="okhttp3.internal.platform.PlatformInitializer"

# Déploiement { #deployment }

Le déploiement d'une application **FastAPI** est relativement simple.

## Que signifie le déploiement { #what-does-deployment-mean }

**Déployer** une application signifie effectuer les étapes nécessaires pour la rendre **disponible pour les
utilisateurs**.

Pour une **API Web**, cela implique normalement de la placer sur une **machine distante**, avec un **programme serveur**

    #  The settings for Application Behavior.
    #  Elements of this map are as below:
    #   o isApplicationBehaviorProject: (NotRequired - Default false)
    #    Does the project is for application behaviors?
    #    This property is a main signal for Application Behavior.
    #    Other properties (for Application Behavior) work when this is true.