import java.util.logging.LogRecord
import java.util.logging.SimpleFormatter

object MessageFormatter : SimpleFormatter() {
  override fun format(record: LogRecord): String {
    return String.format("%s%n", record.message)
  }

    }
  }

  @JvmName("-deprecated_url")
  @Deprecated(
    message = "moved to toUrl()",
    replaceWith = ReplaceWith(expression = "toUrl()"),
    level = DeprecationLevel.ERROR,
  )
  fun url(): URL = toUrl()

  @JvmName("-deprecated_uri")
  @Deprecated(
    message = "moved to toUri()",
    replaceWith = ReplaceWith(expression = "toUri()"),
    level = DeprecationLevel.ERROR,

  public void testGetStackTraceAsString() {
    class StackTraceException extends Exception {
      StackTraceException(String message) {
        super(message);
      }
    }

    StackTraceException e = new StackTraceException("my message");

    String firstLine = quote(e.getClass().getName() + ": " + e.getMessage());
    String secondLine = "\\s*at " + ThrowablesTest.class.getName() + "\\..*";

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

wäre die Response etwa:

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

### Festlegen des `root_path` in der FastAPI-Anwendung

$ uvicorn main:app --root-path /api/v1

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

返回的响应如下：

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

### 在 FastAPI 应用里设置 `root_path`

还有一种方案，如果不能提供 `--root-path` 或等效的命令行选项，则在创建 FastAPI 应用时要设置 `root_path` 参数。

```Python hl_lines="3"

    uri: URI,
    sa: SocketAddress,
    ioe: IOException,
  ) {
    val socketAddress = sa as InetSocketAddress
    failures.add(format("%s %s:%d %s", uri, socketAddress, socketAddress.port, ioe.message!!))
  }

  override fun toString() = "RecordingProxySelector"

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

并且如果您访问 <a href="http://localhost:8000/v2" class="external-link" target="_blank">http://localhost:8000/v2</a>，您将会看到由 FastAPI 返回的响应：

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

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

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

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