例如，识别**汽车**或**博客**。

接着，为实体添加权限，比如**驾驶**（汽车）或**编辑**（博客）。

然后，把 JWT 令牌交给用户（或机器人），他们就可以执行驾驶汽车，或编辑博客等操作。无需注册账户，只要有 API 生成的 JWT 令牌就可以。

同理，JWT 可以用于更复杂的场景。

在这些情况下，多个实体的 ID 可能是相同的，以 ID  `foo` 为例，用户的 ID 是 `foo`，车的 ID 是 `foo`，博客的 ID 也是  `foo`。

为了避免 ID 冲突，在给用户创建 JWT 令牌时，可以为 `sub` 键的值加上前缀，例如 `username:`。因此，在本例中，`sub` 的值可以是：`username:johndoe`。

注意，划重点，`sub` 键在整个应用中应该只有一个唯一的标识符，而且应该是字符串。

## 检查

	u2, _ := url.Parse("https://example.org/path")
	u4, _ := url.Parse("http://192.168.253.200/path")
	rootSlashFoo, _ := filepath.Abs("/foo")
	testCases := []struct {
		arg              string
		expectedEndpoint Endpoint
		expectedType     EndpointType
		expectedErr      error
	}{
		{"/foo", Endpoint{&url.URL{Path: rootSlashFoo}, true, -1, -1, -1}, PathEndpointType, nil},

    price: float


@app.get("/product")
async def create_item(product: Product):
    return product


client = TestClient(app)


def test_get_with_body():
    body = {"name": "Foo", "description": "Some description", "price": 5.5}
    response = client.request("GET", "/product", json=body)
    assert response.json() == body


def test_openapi_schema():
    response = client.get("/openapi.json")

 */
public class ClassLoaderIteratorTest {

    /**
     * @throws Exception
     */
    @Test
    public void test() throws Exception {
        final ClassLoader cl1 = new URLClassLoader(new URL[] { new URL("file:/foo") }, null);
        final ClassLoader cl2 = new URLClassLoader(new URL[] { new URL("file:/bar") }, cl1);
        final ClassLoader cl3 = new URLClassLoader(new URL[] { new URL("file:/baz") }, cl2);

                                             "description", "label1", "label2");
  CHECK_EQ(TF_OK, TF_GetCode(status)) << TF_Message(status);
  TF_DeleteStatus(status);
  auto* cell2 = TFE_MonitoringGetCellCounter2(counter2, "foo", "bar");
  TFE_MonitoringCounterCellIncrementBy(cell2, 2);
  EXPECT_EQ(TFE_MonitoringCounterCellValue(cell2), 2);

  TFE_MonitoringDeleteCounter1(counter1);
  TFE_MonitoringDeleteCounter2(counter2);
}

	{"[X0,X1,X2,X3]", "register list: expected '-' after `[X0`, found ','"},
	{"$foo<ABI0>", "ABI selector only permitted when compiling runtime, reference was to \"foo\""},
}

var amd64BadOperandRuntimeTests = []badOperandTest{
	{"$foo<bletch>", "malformed ABI selector \"bletch\" in reference to \"foo\""},
}

var x86OperandTests = []operandTest{
	{"$(2.928932188134524e-01)", "$(0.29289321881345243)"},

         * be cached and cause other types to fail even though they may
         * not be the authority for the name. For example, if a WINS lookup
         * for FOO fails and caches unknownAddress for FOO, a subsequent
         * lookup for FOO using BCAST should not fail because of that
         * name cached from WINS.
         *
         * So, here we apply the source addresses hashCode to each name to

import junit.framework.TestCase;

/** Tests for {@link MoreObjects}. */
@GwtCompatible(emulated = true)
public class MoreObjectsTest extends TestCase {
  public void testFirstNonNull_withNonNull() {
    String s1 = "foo";
    String s2 = MoreObjects.firstNonNull(s1, "bar");
    assertSame(s1, s2);

    Long n1 = 42L;
    Long n2 = MoreObjects.firstNonNull(null, n1);
    assertSame(n1, n2);

    Boolean b1 = true;

import junit.framework.TestCase;

/** Tests for {@link MoreObjects}. */
@GwtCompatible(emulated = true)
public class MoreObjectsTest extends TestCase {
  public void testFirstNonNull_withNonNull() {
    String s1 = "foo";
    String s2 = MoreObjects.firstNonNull(s1, "bar");
    assertSame(s1, s2);

    Long n1 = 42L;
    Long n2 = MoreObjects.firstNonNull(null, n1);
    assertSame(n1, n2);

    Boolean b1 = true;

    val body =
      MultipartBody.Builder()
        .addPart(headersOf("Foo", "Bar"), "Baz".toRequestBody(null))
        .build()
    assertThat(body.parts.size).isEqualTo(1)
    val part1Buffer = Buffer()
    val part1 = body.part(0)
    part1.body.writeTo(part1Buffer)
    assertThat(part1.headers).isEqualTo(headersOf("Foo", "Bar"))
    assertThat(part1Buffer.readUtf8()).isEqualTo("Baz")
  }

  @Test