Mais elle sera gérée par `unicorn_exception_handler`.

Ainsi, vous recevrez une erreur propre, avec un code d'état HTTP `418` et un contenu JSON :

```JSON
{"message": "Oops! yolo did something. There goes a rainbow..."}
```

/// note | Détails techniques

Vous pourriez aussi utiliser `from starlette.requests import Request` et `from starlette.responses import JSONResponse`.

                            </div>
                            <div class="card-body">
                                <div>
                                    <la:info id="msg" message="true">
                                        <div class="alert alert-success">${msg}</div>
                                    </la:info>
                                    <la:errors property="_global"/>

                                    "anyOf": [{"type": "string"}, {"type": "integer"}]
                                },
                            },
                            "msg": {"title": "Message", "type": "string"},
                            "type": {"title": "Error Type", "type": "string"},
                            "input": {"title": "Input"},

                            </div>
                            <div class="card-body">
                                    <%-- Message --%>
                                <div>
                                    <la:info id="msg" message="true">
                                        <div class="alert alert-success">${msg}</div>
                                    </la:info>

            Http2::class.java.name -> recordFrames
            "javax.net.ssl" -> recordSslDebug && !sslExcludeFilter.matches(record.message)
            else -> false
          }

        if (recorded) {
          synchronized(clientEventsList) {
            clientEventsList.add(record.message)

            if (record.loggerName == "javax.net.ssl") {
              val parameters = record.parameters

                            </div>
                            <div class="card-body">
                                <div>
                                    <la:info id="msg" message="true">
                                        <div class="alert alert-success">${msg}</div>
                                    </la:info>
                                    <la:errors property="_global"/>

```txt
Hello, World from Flask!
```

그리고 [http://localhost:8000/v2](http://localhost:8000/v2)로 이동하면 **FastAPI**의 응답을 볼 수 있습니다:

```JSON
{
    "message": "Hello World"
}

                                "type": "array",
                                "title": "Location",
                            },
                            "msg": {"type": "string", "title": "Message"},
                            "type": {"type": "string", "title": "Error Type"},
                        },
                        "type": "object",
                        "required": ["loc", "msg", "type"],

```JSON
{
    "message": "Hello World",
    "root_path": "/api/v1"
}
```

/// tip

注意，儘管你是用 `http://127.0.0.1:8000/app` 存取，它仍然顯示從 `--root-path` 選項取得的 `root_path` 為 `/api/v1`。

///

接著打開使用 Traefik 埠且包含路徑前綴的 URL：[http://127.0.0.1:9999/api/v1/app](http://127.0.0.1:9999/api/v1/app)。

我們會得到相同的回應：

```JSON
{
    "message": "Hello World",
    "root_path": "/api/v1"
}

      val trailersDelay =
        measureTime {
          val exception =
            assertFailsWith<IOException> {
              response.trailers()
            }
          assertThat(exception.message).isIn(
            "Socket closed", // HTTP/1.1
            "stream was reset: CANCEL", // HTTP/2
          )
        }
      assertThat(trailersDelay).isGreaterThan(250.milliseconds)