* 前端会把令牌临时存储在某处。
* 用户在前端中点击跳转到前端应用的其他部分。
* 前端需要从 API 获取更多数据。
    * 但该端点需要身份验证。
    * 因此，为了与我们的 API 进行身份验证，它会发送一个 `Authorization` 请求头，值为 `Bearer ` 加上令牌。
    * 如果令牌内容是 `foobar`，`Authorization` 请求头的内容就是：`Bearer foobar`。

## **FastAPI** 的 `OAuth2PasswordBearer` { #fastapis-oauth2passwordbearer }

**FastAPI** 在不同抽象层级提供了多种安全工具。

本示例将使用 **OAuth2** 的 **Password** 流程并配合 **Bearer** 令牌，通过 `OAuth2PasswordBearer` 类来实现。

// just nice to know that it compiles.
void* create(TF_OpKernelConstruction* ctx) {
  TF_DataType type;
  TF_Status* s = TF_NewStatus();
  TF_OpKernelConstruction_GetAttrType(ctx, "foobar", &type, s);
  TF_DeleteStatus(s);
  return NULL;
}

// A compute function. This will never actually get called in this test, it's
// just nice to know that it compiles.

   * the sequence will be returned as a string with no changes to the content.
   *
   * <p>Examples:
   *
   * {@snippet :
   * Ascii.truncate("foobar", 7, "..."); // returns "foobar"
   * Ascii.truncate("foobar", 5, "..."); // returns "fo..."
   * }
   *
   * <p><b>Note:</b> This method <i>may</i> work with certain non-ASCII text but is not safe for use

 *
 * @author Kurt Alfred Kluever
 */
@NullUnmarked
public class MessageDigestHashFunctionTest extends TestCase {
  private static final ImmutableSet<String> INPUTS = ImmutableSet.of("", "Z", "foobar");

  // From "How Provider Implementations Are Requested and Supplied" from

  }

  public void testEncodedLength_invalidStrings() {
    testEncodedLengthFails(newString(MIN_HIGH_SURROGATE), 0);
    testEncodedLengthFails("foobar" + newString(MIN_HIGH_SURROGATE), 6);
    testEncodedLengthFails(newString(MIN_LOW_SURROGATE), 0);
    testEncodedLengthFails("foobar" + newString(MIN_LOW_SURROGATE), 6);
    testEncodedLengthFails(newString(MIN_HIGH_SURROGATE, MIN_HIGH_SURROGATE), 0);
  }

  public void testThreadRenaming() {
    Executor renamingExecutor =
        renamingDecorator(newDirectExecutorService(), Suppliers.ofInstance("FooBar"));
    String oldName = Thread.currentThread().getName();
    renamingExecutor.execute(
        () -> assertThat(Thread.currentThread().getName()).isEqualTo("FooBar"));
    assertThat(Thread.currentThread().getName()).isEqualTo(oldName);
  }

  public void testThreadRenaming() {
    Executor renamingExecutor =
        renamingDecorator(newDirectExecutorService(), Suppliers.ofInstance("FooBar"));
    String oldName = Thread.currentThread().getName();
    renamingExecutor.execute(
        () -> assertThat(Thread.currentThread().getName()).isEqualTo("FooBar"));
    assertThat(Thread.currentThread().getName()).isEqualTo(oldName);
  }

        assertEquals("8", request.commandLine.getOptionValue(CLIManager.THREADS));

        // override from command line
        request = new CliRequest(new String[] {"--builder", "foobar"}, null);
        cli.cli(request);
        assertEquals("foobar", request.commandLine.getOptionValue("builder"));
    }

    @Test
    void testMavenConfigInvalid() throws Exception {
        System.setProperty(

   * the sequence will be returned as a string with no changes to the content.
   *
   * <p>Examples:
   *
   * {@snippet :
   * Ascii.truncate("foobar", 7, "..."); // returns "foobar"
   * Ascii.truncate("foobar", 5, "..."); // returns "fo..."
   * }
   *
   * <p><b>Note:</b> This method <i>may</i> work with certain non-ASCII text but is not safe for use

  }

  public void testRemoveFromStringHeap() {
    MinMaxPriorityQueue<String> mmHeap =
        rawtypeToWildcard(MinMaxPriorityQueue.expectedSize(5)).create();
    Collections.addAll(mmHeap, "foo", "bar", "foobar", "barfoo", "larry", "sergey", "eric");
    assertTrue("Heap is not intact initially", mmHeap.isIntact());
    assertThat(mmHeap.peek()).isEqualTo("bar");
    assertThat(mmHeap.peekLast()).isEqualTo("sergey");