}
				err = d.deserialize(r)
				r.Close()
				return err != nil, nil
			case InsufficientReadQuorum, StorageErr:
				return true, nil
			}
			return false, err
		}
		err = d.deserialize(r)
		r.Close()
		return err != nil, nil
	}

	// Caches are read+written without locks,
	retries := 0
	for retries < 5 {
		retry, err := load(name, time.Minute)
		if err != nil {

  void awaitTimedWaiting(Thread thread) {
    while (true) {
      switch (thread.getState()) {
        case BLOCKED:
        case NEW:
        case RUNNABLE:
        case WAITING:
          Thread.yield();
          break;
        case TIMED_WAITING:
          return;
        case TERMINATED:
          throw new AssertionError();
      }
    }
  }

                    return 'ズ';
                case 'ｾ':
                    return 'ゼ';
                case 'ｿ':
                    return 'ゾ';
                case 'ﾀ':
                    return 'ダ';
                case 'ﾁ':
                    return 'ヂ';
                case 'ﾂ':
                    return 'ヅ';
                case 'ﾃ':
                    return 'デ';
                case 'ﾄ':

{!../../docs_src/custom_response/tutorial009b.py!}
```

In this case, you can return the file path directly from your *path operation* function.

## Custom response class

You can create your own custom response class, inheriting from `Response` and using it.

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.util.logging.Logger;

public class ContentCache implements Closeable {

    protected static final Logger logger = Logger.getLogger(ContentCache.class.getName());

    private final byte[] data;

    private final File file;

    public ContentCache(final byte[] data) {
        this.data = data;

                count++;
            } finally {
                CloseableUtil.close(is);
            }
        });
        assertTrue(count > 0);
    }

    /**
     * @throws Exception
     */
    @Test
    public void testForEachJarFile() throws Exception {
        final String classFilePath = TestCase.class.getName().replace('.', '/') + ".class";
        final URL classURL = ResourceUtil.getResource(classFilePath);

These are any `OPTIONS` request with `Origin` and `Access-Control-Request-Method` headers.

In this case the middleware will intercept the incoming request and respond with appropriate CORS headers, and either a `200` or `400` response for informational purposes.

### Simple requests

Any request with an `Origin` header. In this case the middleware will pass the request through as normal, but will include appropriate CORS headers on the response.

# `UploadFile` class

You can define *path operation function* parameters to be of the type `UploadFile` to receive files from the request.

You can import it directly from `fastapi`:

```python
from fastapi import UploadFile
```

::: fastapi.UploadFile
    options:
        members:
            - file
            - filename
            - size
            - headers
            - content_type
            - read

WebSocketErrorModel: Type[BaseModel] = create_model("WebSocket")


class FastAPIError(RuntimeError):
    """
    A generic, FastAPI-specific error.
    """


class ValidationException(Exception):
    def __init__(self, errors: Sequence[Any]) -> None:
        self._errors = errors

    def errors(self) -> Sequence[Any]:
        return self._errors


class RequestValidationError(ValidationException):

            case '4':
            case '5':
            case '6':
            case '7':
            case '8':
            case '9':
                value += arr[ ai ] - '0';
                break;
            case 'A':
            case 'B':
            case 'C':
            case 'D':
            case 'E':
            case 'F':
                value += 10 + ( arr[ ai ] - 'A' );
                break;
            case 'a':