# Exceptions - `HTTPException` and `WebSocketException`

These are the exceptions that you can raise to show errors to the client.

When you raise an exception, as would happen with normal Python, the rest of the execution is aborted. This way you can raise these exceptions from anywhere in the code to abort a request and show the error to the client.

You can use:

* `HTTPException`
* `WebSocketException`

  }
}
```

#### `HTTPException` de FastAPI vs `HTTPException` de Starlette

**FastAPI** tiene su propio `HTTPException`.

Y la clase de error `HTTPException` de **FastAPI** hereda de la clase de error `HTTPException` de Starlette.

La única diferencia es que el `HTTPException` de **FastAPI** acepta cualquier dato JSON-able para el campo `detail`, mientras que el `HTTPException` de Starlette solo acepta strings para ello.

**FastAPI** ⚙️ 👫 🔘 🏆 👉.

///

## 🔗 ⏮️ `yield` & `HTTPException`

👆 👀 👈 👆 💪 ⚙️ 🔗 ⏮️ `yield` & ✔️ `try` 🍫 👈 ✊ ⚠.

⚫️ 5️⃣📆 😋 🤚 `HTTPException` ⚖️ 🎏 🚪 📟, ⏮️ `yield`. ✋️ **⚫️ 🏆 🚫 👷**.

🚪 📟 🔗 ⏮️ `yield` 🛠️ *⏮️* 📨 📨, [⚠ 🐕‍🦺](../handling-errors.md#_4){.internal-link target=_blank} 🔜 ✔️ ⏪ 🏃. 📤 🕳 😽 ⚠ 🚮 👆 🔗 🚪 📟 (⏮️ `yield`).

## Use `HTTPException` { #use-httpexception }

To return HTTP responses with errors to the client you use `HTTPException`.

### Import `HTTPException` { #import-httpexception }

{* ../../docs_src/handling_errors/tutorial001.py hl[1] *}

### Raise an `HTTPException` in your code { #raise-an-httpexception-in-your-code }

    "size": "XL"
  }
}
```

#### FastAPI `HTTPException` 🆚 💃 `HTTPException`

**FastAPI** ✔️ 🚮 👍 `HTTPException`.

& **FastAPI**'Ⓜ `HTTPException` ❌ 🎓 😖 ⚪️➡️ 💃 `HTTPException` ❌ 🎓.

🕴 🔺, 👈 **FastAPI**'Ⓜ `HTTPException` ✔ 👆 🚮 🎚 🔌 📨.

👉 💪/⚙️ 🔘 ✳ 2️⃣.0️⃣ & 💂‍♂ 🚙.

, 👆 💪 🚧 🙋‍♀ **FastAPI**'Ⓜ `HTTPException` 🛎 👆 📟.

✋️ 🕐❔ 👆 ® ⚠ 🐕‍🦺, 👆 🔜 ® ⚫️ 💃 `HTTPException`.

 */
package okhttp.regression.compare

import android.net.http.ConnectionMigrationOptions
import android.net.http.DnsOptions
import android.net.http.HttpEngine
import android.net.http.HttpException
import android.net.http.QuicOptions
import android.net.http.UrlRequest
import android.net.http.UrlRequest.Callback
import android.net.http.UrlRequest.REQUEST_PRIORITY_MEDIUM
import android.net.http.UrlResponseInfo

### Return the error { #return-the-error }

After detecting that the credentials are incorrect, return an `HTTPException` with a status code 401 (the same returned when no credentials are provided) and add the header `WWW-Authenticate` to make the browser show the login prompt again:

* `Cookie`
* `Header`
* `Path`
* `Query`

👫 👷 🎏 🌌 🎏 FastAPI 🔗/*➡ 🛠️*:

{* ../../docs_src/websockets/tutorial002.py hl[66:77,76:91] *}

/// info

👉 *️⃣ ⚫️ 🚫 🤙 ⚒ 🔑 🤚 `HTTPException`, ↩️ 👥 🤚 `WebSocketException`.

👆 💪 ⚙️ 📪 📟 ⚪️➡️ <a href="https://tools.ietf.org/html/rfc6455#section-7.4.1" class="external-link" target="_blank">☑ 📟 🔬 🔧</a>.

///

### 🔄 *️⃣ ⏮️ 🔗

{*../../docs_src/websockets/tutorial002_an_py310.py hl[68:69,82]*}

/// info | Informação

Como isso é um WebSocket, não faz muito sentido levantar uma `HTTPException`, em vez disso levantamos uma `WebSocketException`.

📏, ⚫️ 🔜 ✊ 🎏 🕰 🔬 `stanleyjobsox` `stanleyjobson` 🌘 ⚫️ ✊ 🔬 `johndoe` `stanleyjobson`. & 🎏 🔐.

👈 🌌, ⚙️ `secrets.compare_digest()` 👆 🈸 📟, ⚫️ 🔜 🔒 🛡 👉 🎂 ↔ 💂‍♂ 👊.

### 📨 ❌

⏮️ 🔍 👈 🎓 ❌, 📨 `HTTPException` ⏮️ 👔 📟 4️⃣0️⃣1️⃣ (🎏 📨 🕐❔ 🙅‍♂ 🎓 🚚) & 🚮 🎚 `WWW-Authenticate` ⚒ 🖥 🎦 💳 📋 🔄: