Sie können mehrere `File`- und `Form`-Parameter in einer *Pfadoperation* deklarieren, aber Sie können nicht gleichzeitig auch `Body`-Felder deklarieren, welche Sie als JSON erwarten, da der Request den Body mittels `multipart/form-data` statt `application/json` kodiert.

Das ist keine Limitation von **FastAPI**, sondern Teil des HTTP-Protokolls.

///

## Zusammenfassung

///

## ⚫️❔ "📨 💽"

🌌 🕸 📨 (`<form></form>`) 📨 💽 💽 🛎 ⚙️ "🎁" 🔢 👈 📊, ⚫️ 🎏 ⚪️➡️ 🎻.

**FastAPI** 🔜 ⚒ 💭 ✍ 👈 📊 ⚪️➡️ ▶️️ 🥉 ↩️ 🎻.

/// note | 📡 ℹ

📊 ⚪️➡️ 📨 🛎 🗜 ⚙️ "📻 🆎" `application/x-www-form-urlencoded` 🕐❔ ⚫️ 🚫 🔌 📁.

✋️ 🕐❔ 📨 🔌 📁, ⚫️ 🗜 `multipart/form-data`. 🚥 👆 ⚙️ `File`, **FastAPI** 🔜 💭 ⚫️ ✔️ 🤚 📁 ⚪️➡️ ☑ 🍕 💪.

<font color="#4E9A06">INFO</font>:     Started server process [<font color="#06989A">2265873</font>]
<font color="#4E9A06">INFO</font>:     Waiting for application startup.
<font color="#4E9A06">INFO</font>:     Application startup complete.
```

</div>

`fastapi` 命令列程式就是 **FastAPI CLI**。

FastAPI CLI 接收你的 Python 程式路徑（例如 `main.py`），並自動檢測 FastAPI 實例（通常命名為 `app`），確定正確的引入模組流程，然後運行該應用程式。

      fileSystem.sink(path).use {
        response.body.source().readAll(it)
      }

      println(fileSystem.source(path).buffer().readUtf8())
    }
  }

  companion object {
    val MEDIA_TYPE_JSON = "application/json".toMediaType()
  }
}

fun main() {
  PostPath().run()

package org.apache.maven.api.cli;

import org.apache.maven.api.annotations.Experimental;
import org.apache.maven.api.annotations.Nonnull;

/**
 * Defines the contract for a component responsible for invoking a Maven application
 * using the information provided in an {@link InvokerRequest}. This interface is central
 * to the construction and invocation of Maven commands and builds, and it fully parses arguments.
 *

### Use the `app.dependency_overrides` attribute { #use-the-app-dependency-overrides-attribute }

For these cases, your **FastAPI** application has an attribute `app.dependency_overrides`, it is a simple `dict`.

To override a dependency for testing, you put as a key the original dependency (a function), and as the value, your dependency override (another function).

import javax.net.ssl.SSLSocket
import okhttp3.Protocol
import okhttp3.internal.platform.Platform
import org.conscrypt.Conscrypt

/**
 * Simple non-reflection SocketAdapter for Conscrypt when included as an application dependency
 * directly.
 */
class ConscryptSocketAdapter : SocketAdapter {
  override fun matchesSocket(sslSocket: SSLSocket): Boolean = Conscrypt.isConscrypt(sslSocket)

     * When enabled, search results can be retrieved via JSON API.
     */
    @Size(max = 10)
    public String webApiJson;

    /**
     * Application-specific value for custom configurations.
     * This field can be used to store custom application settings.
     */
    @Size(max = 10000)
    public String appValue;

    /**
     * Default label value to use when no specific label is selected.

**FastAPI** will make sure to read that data from the right place instead of JSON.

/// note | Technical Details

Data from forms is normally encoded using the "media type" `application/x-www-form-urlencoded` when it doesn't include files.

But when the form includes files, it is encoded as `multipart/form-data`. If you use `File`, **FastAPI** will know it has to get the files from the correct part of the body.

**FastAPI** se certificará de ler esses dados do lugar certo, ao invés de JSON.

/// note | Detalhes Técnicos

Dados de formulários normalmente são codificados usando o "media type" (tipo de mídia) `application/x-www-form-urlencoded` quando não incluem arquivos.