/// info

Added in FastAPI 0.135.0.

///

## What are Server-Sent Events? { #what-are-server-sent-events }

SSE is a standard for streaming data from the server to the client over HTTP.

Each event is a small text block with "fields" like `data`, `event`, `id`, and `retry`, separated by blank lines.

It looks like this:

```
data: {"name": "Portal Gun", "price": 999.99}

 * and DI container integration.
 *
 * <p>Thread Safety: This class is thread-safe. Each cached entry holds its own
 * GroovyClassLoader. The cache uses Guava Cache with segment-based locking for
 * lock-free concurrent reads. Each evaluate() call creates a new Script instance
 * to ensure thread isolation of bindings.</p>
 *

    /** Index of the currently iterated {@link Iterator}. */
    protected int index;

    /**
     * Returns an {@link Iterable} that wraps a {@link MultiIterator} for use in a for-each statement.
     *
     * @param <E> the element type
     * @param iterables the array of {@link Iterable} (must not be {@literal null})
     * @return an {@link Iterable} wrapping a {@link MultiIterator}
     */

 * ...
 * ThreadN: acquire(LockN) --X acquire(LockA)
 * </pre>
 *
 * <p>The implementation detects cycles by constructing a directed graph in which each lock
 * represents a node and each edge represents an acquisition ordering between two locks.
 *
 * <ul>
 *   <li>Each lock adds (and removes) itself to/from a ThreadLocal Set of acquired locks when the
 *       Thread acquires its first hold (and releases its last remaining hold).

   * value, you should always choose it explicitly.
   *
   * <p>The current implementation uses the concurrency level to create a fixed number of hashtable
   * segments, each governed by its own write lock. The segment lock is taken once for each explicit
   * write, and twice for each cache loading computation (once prior to loading the new value, and
   * once after loading completes). Much internal cache management is performed at the segment

  - 🔍 FastAPIで使用される、データバリデーションと設定管理向けの [Pydantic](https://docs.pydantic.dev)。
  - 💾 SQLデータベースとしての [PostgreSQL](https://www.postgresql.org)。
- 🚀 フロントエンド向けの [React](https://react.dev)。
  - 💃 TypeScript、hooks、Vite、その他のモダンなフロントエンドスタックの各要素を使用。
  - 🎨 フロントエンドコンポーネント向けの [Tailwind CSS](https://tailwindcss.com) と [shadcn/ui](https://ui.shadcn.com)。
  - 🤖 自動生成されたフロントエンドクライアント。

import okio.Source
import okio.blackholeSink
import okio.buffer

/**
 * A cache that uses a bounded amount of space on a filesystem. Each cache entry has a string key
 * and a fixed number of values. Each key must match the regex `[a-z0-9_-]{1,64}`. Values are byte
 * sequences, accessible as streams or files. Each value must be between `0` and `Int.MAX_VALUE`
 * bytes in length.
 *

on:function(b,f){var g=a.split(f.valAttr("allowing")||"");if(e=a.inArray("amex",g)>-1,d=e&&1===g.length,g.length>0){var h=!1;if(a.each(g,function(d,e){if(e in c){if(b.length>=c[e][0]&&b.length<=c[e][1])return h=!0,!1}else a.formUtils.warn('Use of unknown credit card "'+e+'"',!0)}),!h)return!1}if(""!==b.replace(new RegExp("[0-9]","g"),""))return!1;var i=0;return a.each(b.split("").reverse(),function(a,b){b=parseInt(b,10),a%2===0?i+=b:(b*=2,i+=b<10?b:b-9)}),i%10===0},errorMessage:"",errorMessageKe...

On startup all remote servers must be specified.
From that individual connections will be spawned to each remote server,
or incoming requests will be hooked up to the appropriate connection.

To get a connection to a specific server, use `Manager.Connection(host)` to get a connection to the specified host.
From this connection individual requests can be made.

Each handler, with optional subroutes can be registered with the manager using

 * ordering of values for a given key. See the {@link Multimap} documentation for information common
 * to all multimaps.
 *
 * <p>The {@link #get}, {@link #removeAll}, and {@link #replaceValues} methods each return a {@link
 * List} of values. Though the method signature doesn't say so explicitly, the map returned by
 * {@link #asMap} has {@code List} values.
 *
 * <p>See the Guava User Guide article on <a href=