* possibly run in another thread.
 *
 * <p>{@code UncheckedExecutionException} is intended as an alternative to {@code
 * ExecutionException} when the exception thrown by a task is an unchecked exception. However, it
 * may also wrap a checked exception in some cases.
 *
 * <p>When wrapping an {@code Error} from another thread, prefer {@link ExecutionError}. When

Para eso, usas `app.add_middleware()` (como en el ejemplo para CORS).

```Python
from fastapi import FastAPI
from unicorn import UnicornMiddleware

app = FastAPI()

app.add_middleware(UnicornMiddleware, some_config="rainbow")
```

   */
  private static final LittleEndianBytes byteArray = makeGetter();

  /**
   * Load 8 bytes into long in a little endian manner, from the substring between position and
   * position + 8. The array must have at least 8 bytes from offset (inclusive).
   *
   * @param input the input bytes
   * @param offset the offset into the array at which to start
   * @return a long of a concatenated 8 bytes
   */

		if etag == "" {
			continue
		}
		etagOccurrenceMap[etag]++
	}

	maxima = 0 // Counter for remembering max occurrence of elements.
	latest := ""

	// Find the common cardinality from previously collected
	// occurrences of elements.
	for etag, count := range etagOccurrenceMap {
		if count < maxima {
			continue
		}

		// We are at or above maxima
		if count > maxima {
			maxima = count

        // Test successful casting from tagged object
        ASN1Integer content = new ASN1Integer(789);
        ASN1TaggedObject tagged = new DERTaggedObject(true, 1, content);
        ASN1Integer result = ASN1Util.as(ASN1Integer.class, tagged);
        assertSame(content, result);
    }

    @Test
    void testAs_ASN1TaggedObject_Failure() {
        // Test failed casting from tagged object

/// note | Technical Details

You could also use `from starlette.responses import HTMLResponse`.

**FastAPI** provides the same `starlette.responses` as `fastapi.responses` just as a convenience for you, the developer. But most of the available responses come directly from Starlette.

///

### `Response` { #response }

The main `Response` class, all the other responses inherit from it.

You can return it directly.

		case "host":
			// Go http server removes "host" from Request.Header
			extractedSignedHeaders.Set(header, r.Host)
		case "transfer-encoding":
			// Go http server removes "host" from Request.Header
			extractedSignedHeaders[http.CanonicalHeaderKey(header)] = r.TransferEncoding
		case "content-length":
			// Signature-V4 spec excludes Content-Length from signed headers list for signature calculation.

That means that any value read in Python from an environment variable will be a `str`, and any conversion to a different type or any validation has to be done in code.

## Pydantic `Settings` { #pydantic-settings }

# `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

    private void visit(MetadataGraphVertex from, List<MetadataGraphVertex> visited, MetadataGraph graph) {
        if (visited.contains(from)) {
            return;
        }

        visited.add(from);

        List<MetadataGraphEdge> exitList = graph.getExcidentEdges(from);
        // String s = "|---> "+from.getMd().toString()+" - "+(exitList == null ? -1 : exitList.size()) + " exit links";