* `expose_headers` - Вказує, які заголовки відповіді повинні бути доступні для браузера. За замовчуванням `[]`.
* `max_age` - Встановлює максимальний час (у секундах) для кешування CORS-відповідей у браузерах. За замовчуванням `600`.

Цей middleware обробляє два типи HTTP-запитів...

### Попередні CORS-запити (preflight requests)

- name: agentkit
  html_url: https://github.com/BCG-X-Official/agentkit
  stars: 1912
  owner_login: BCG-X-Official
  owner_html_url: https://github.com/BCG-X-Official
- name: manage-fastapi
  html_url: https://github.com/ycd/manage-fastapi
  stars: 1885
  owner_login: ycd
  owner_html_url: https://github.com/ycd
- name: openapi-python-client
  html_url: https://github.com/openapi-generators/openapi-python-client

## Cluster Replication Metrics

Metrics marked as ``Site Replication Only`` only populate on deployments with [Site Replication](https://docs.min.io/community/minio-object-store/operations/install-deploy-manage/multi-site-replication.html) configurations.

# FastAPI CLI { #fastapi-cli }

**FastAPI CLI** is a command line program that you can use to serve your FastAPI app, manage your FastAPI project, and more.

When you install FastAPI (e.g. with `pip install "fastapi[standard]"`), it includes a package called `fastapi-cli`, this package provides the `fastapi` command in the terminal.

To run your FastAPI app for development, you can use the `fastapi dev` command:

<div class="termy">

```console

func NewPreparedStmtDB(connPool ConnPool, maxSize int, ttl time.Duration) *PreparedStmtDB {
	return &PreparedStmtDB{
		ConnPool: connPool,                     // Assigns the provided connection pool to manage database connections.
		Stmts:    stmt_store.New(maxSize, ttl), // Initializes a new statement store with the specified maximum size and TTL.

## Connection Pool

A primary responsibility for any HTTP client is to efficiently manage network connections. Creating and establishing new connections require a fair amount of overhead and added latency. OkHttp will make every effort to reuse existing connections to avoid this overhead and added latency.

/**
 * Base class for services that can implement {@link #startUp}, {@link #run} and {@link #shutDown}
 * methods. This class uses a single thread to execute the service; consider {@link AbstractService}
 * if you would like to manage any threading manually.
 *
 * @author Jesse Wilson
 * @since 1.0
 */
@GwtIncompatible
@J2ktIncompatible
public abstract class AbstractExecutionThreadService implements Service {

* `expose_headers` - Indicate any response headers that should be made accessible to the browser. Defaults to `[]`.
* `max_age` - Sets a maximum time in seconds for browsers to cache CORS responses. Defaults to `600`.

The middleware responds to two particular types of HTTP request...

### CORS preflight requests { #cors-preflight-requests }

* `allow_credentials` - 指示跨域请求支持 cookies。默认是 `False`。另外，允许凭证时 `allow_origins` 不能设定为 `['*']`，必须指定源。
* `expose_headers` - 指示可以被浏览器访问的响应头。默认为 `[]`。
* `max_age` - 设定浏览器缓存 CORS 响应的最长时间，单位是秒。默认为 `600`。

中间件响应两种特定类型的 HTTP 请求……

### CORS 预检请求

这是些带有 `Origin` 和 `Access-Control-Request-Method` 请求头的 `OPTIONS` 请求。

* `expose_headers` – Angabe der Responseheader, auf die der Browser zugreifen können soll. Standardmäßig `[]`.
* `max_age` – Legt eine maximale Zeit in Sekunden fest, die Browser CORS-Responses zwischenspeichern dürfen. Standardmäßig `600`.

Die Middleware antwortet auf zwei besondere Arten von HTTP-Requests ...