<img src="/img/async/concurrent-burgers/concurrent-burgers-07.png" class="illustration">

/// info

Beautiful illustrations by <a href="https://www.instagram.com/ketrinadrawsalot" class="external-link" target="_blank">Ketrina Thompson</a>. 🎨

///

---

Imagine you are the computer / program 🤖 in that story.

<img src="/img/async/concurrent-burgers/concurrent-burgers-07.png" class="illustration">

/// info

Illustrations proposées par <a href="https://www.instagram.com/ketrinadrawsalot" class="external-link" target="_blank">Ketrina Thompson</a>. 🎨

///

---

Imaginez que vous êtes l'ordinateur / le programme 🤖 dans cette histoire.

        }

        /**
         * Deletes old documents from the search index.
         * This method removes documents that were indexed in previous
         * crawling sessions for the same data configuration, keeping
         * only the documents from the current session.
         *
         * <p>The deletion process:</p>
         * <ul>
         *   <li>Checks if old document deletion is enabled</li>

			return nil, err
		}

		return jsonToValue(result)
	default:
		if pathExpr[len(pathExpr)-1].Key == nil {
			return nil, errInvalidKeypath
		}
		return r.Get(pathExpr[len(pathExpr)-1].Key.keyString())
	}
}

// jsonToValue will convert the json value to an internal value.
func jsonToValue(result any) (*Value, error) {
	switch rval := result.(type) {
	case string:
		return FromString(rval), nil

/// info | Información

Hermosas ilustraciones de <a href="https://www.instagram.com/ketrinadrawsalot" class="external-link" target="_blank">Ketrina Thompson</a>. 🎨

///

---

Imagina que eres la computadora / programa 🤖 en esa historia.

If you are building an application or a web API, it's rarely the case that you can put everything in a single file.

**FastAPI** provides a convenience tool to structure your application while keeping all the flexibility.

/// info

If you come from Flask, this would be the equivalent of Flask's Blueprints.

///

## An example file structure { #an-example-file-structure }

   * reconstructed using public factory methods. This ensures that the implementation types remain
   * as implementation details.
   *
   * <p>Since the bimap is immutable, ImmutableBiMap doesn't require special logic for keeping the
   * bimap and its inverse in sync during serialization, the way AbstractBiMap does.
   */
  @J2ktIncompatible // serialization
  private static final class SerializedForm<K, V> extends ImmutableMap.SerializedForm<K, V> {

你和戀人享用這頓大餐，整個過程十分開心✨

<img src="/img/async/concurrent-burgers/concurrent-burgers-07.png" class="illustration">

/// info

漂亮的插畫來自 <a href="https://www.instagram.com/ketrinadrawsalot" class="external-link" target="_blank">Ketrina Thompson</a>. 🎨

///

---

想像你是故事中的電腦或程式 🤖。

當你排隊時，你在放空😴，等待輪到你，沒有做任何「生產性」的事情。但這沒關係，因為收銀員只是接單（而不是準備食物），所以排隊速度很快。

你们享用了汉堡，整个过程都很开心。✨

<img src="/img/async/concurrent-burgers/concurrent-burgers-07.png" class="illustration">

/// info

漂亮的插画来自 <a href="https://www.instagram.com/ketrinadrawsalot" class="external-link" target="_blank">Ketrina Thompson</a>. 🎨

///

---

在那个故事里，假设你是计算机程序 🤖 。

当你在排队时，你只是闲着😴， 轮到你前不做任何事情（仅排队）。但排队很快，因为收银员只接订单（不准备订单），所以这一切都还好。

{* ../../docs_src/behind_a_proxy/tutorial001_py39.py hl[6] *}

And the proxy would be **"stripping"** the **path prefix** on the fly before transmitting the request to the app server (probably Uvicorn via FastAPI CLI), keeping your application convinced that it is being served at `/app`, so that you don't have to update all your code to include the prefix `/api/v1`.

Up to here, everything would work as normally.