from typing import Annotated

from fastapi import FastAPI, Header
from pydantic import BaseModel

app = FastAPI()


class CommonHeaders(BaseModel):
    model_config = {"extra": "forbid"}

    host: str
    save_data: bool
    if_modified_since: str | None = None
    traceparent: str | None = None
    x_tag: list[str] = []


@app.get("/items/")
async def read_items(headers: Annotated[CommonHeaders, Header()]):

from typing import Union

from fastapi import FastAPI, Header
from pydantic import BaseModel

app = FastAPI()


class CommonHeaders(BaseModel):
    model_config = {"extra": "forbid"}

    host: str
    save_data: bool
    if_modified_since: Union[str, None] = None
    traceparent: Union[str, None] = None
    x_tag: list[str] = []


@app.get("/items/")
async def read_items(headers: CommonHeaders = Header()):

 *
 */
public class AdminStorageAction extends FessAdminAction {

    /**
     * Default constructor.
     */
    public AdminStorageAction() {
        super();
    }

    /** Role name for admin storage operations */
    public static final String ROLE = "admin-storage";

    private static final Logger logger = LogManager.getLogger(AdminStorageAction.class);

    @Override

import org.codelibs.fess.crawler.exception.CrawlerSystemException;
import org.dbflute.utflute.core.PlainTestCase;

/**
 * @author shinsuke
 *
 */
public class TextExtractorTest extends PlainTestCase {
    private static final Logger logger = LogManager.getLogger(TextExtractorTest.class);

    public TextExtractor textExtractor;

    @Override
    protected void setUp() throws Exception {
        super.setUp();

 * Source of {@link LongAddable} objects that deals with GWT, Unsafe, and all that.
 *
 * @author Louis Wasserman
 */
final class LongAddables {
  private static final Supplier<LongAddable> SUPPLIER;

  static {
    Supplier<LongAddable> supplier;
    try {
      // trigger static initialization of the LongAdder class, which may fail
      LongAdder unused = new LongAdder();
      supplier =
          new Supplier<LongAddable>() {

Debido a esto, el propio **FastAPI** proporciona una documentación de API alternativa (usando ReDoc), a la cual puedes acceder en <a href="http://127.0.0.1:8000/redoc" class="external-link" target="_blank">http://127.0.0.1:8000/redoc</a>:

 * }
 * public void testFooLeak() {
 *   GcFinalization.awaitClear(fooWeakRef());
 * }
 * }
 *
 * <p>This class cannot currently be used to test soft references, since this class does not try to
 * create the memory pressure required to cause soft references to be cleared.
 *
 * <p>This class only provides testing utilities. It is not designed for direct use in production or
 * for benchmarking.
 *

/**
 * Test class for Lmhosts
 */
class LmhostsTest {

    private Lmhosts lmhosts;
    private CIFSContext mockContext;
    private Configuration mockConfig;

    @TempDir
    Path tempDir;

    @BeforeEach
    void setUp() {
        lmhosts = new Lmhosts();
        mockContext = mock(CIFSContext.class);
        mockConfig = mock(Configuration.class);

<div class="termy">

```console
$ pip install "fastapi[all]"
---> 100%
```

</div>

### Create the `Settings` object { #create-the-settings-object }

Import `BaseSettings` from Pydantic and create a sub-class, very much like with a Pydantic model.

The same way as with Pydantic models, you declare class attributes with type annotations, and possibly default values.

    TestCharSink failSink = new TestCharSink(WRITE_THROWS);
    assertThrows(IOException.class, () -> new TestCharSource(STRING).copyTo(failSink));
    assertTrue(failSink.wasStreamClosed());
  }

  public void testClosesOnErrors_whenWritingFromReaderThatThrows() {
    TestCharSink okSink = new TestCharSink();
    assertThrows(IOException.class, () -> okSink.writeFrom(new TestReader(READ_THROWS)));
    assertTrue(okSink.wasStreamClosed());