// Create a request to use.
		req, e := http.NewRequest(http.MethodGet, "http://host/a/b?"+query.Encode(), nil)
		if e != nil {
			t.Errorf("(%d) failed to create http.Request, got %v", i, e)
		}

		// Do the same for the headers.
		for key, value := range testCase.headers {
			req.Header.Set(key, value)
		}

		// parse form.
		req.ParseForm()

		// Check if it matches!

## Handlers & Routes

Handlers have a predefined Handler ID.
In addition, there can be several *static* subroutes used to differentiate between different handlers of the same ID.
A subroute on a client must match a subroute on the server. So routes cannot be used for dynamic routing, unlike HTTP.

	// works, but only when running one binary at a time.
	// Use a file lock to make sure only one wrapper is running at a time.
	//
	// The lock file is never deleted, to avoid concurrent locks on distinct
	// files with the same path.
	lockName := filepath.Join(os.TempDir(), "go_ios_exec-"+deviceID+".lock")
	lock, err = os.OpenFile(lockName, os.O_CREATE|os.O_RDONLY, 0666)
	if err != nil {
		return 1, err
	}

    testConcurrentLoading(CacheBuilder.newBuilder().expireAfterWrite(10, SECONDS));
  }

  /**
   * On a successful concurrent computation, only one thread does the work, but all the threads get
   * the same result.
   */
  private static void testConcurrentLoadingDefault(CacheBuilder<Object, Object> builder)
      throws InterruptedException {

    int count = 10;
    AtomicInteger callCount = new AtomicInteger();

		Description:    "Time stamp format pattern requires additional fields in the SQL expression.",
		HTTPStatusCode: http.StatusBadRequest,
	},
	ErrEvaluatorInvalidTimestampFormatPatternSymbolForParsing: {
		Code:           "EvaluatorInvalidTimestampFormatPatternSymbolForParsing",
		Description:    "Time stamp format pattern contains a valid format symbol that cannot be applied to time stamp parsing in the SQL expression.",

这样，即使你返回的类型与响应模型不同，你也可以为函数添加正确的类型注解，供编辑器和 mypy 等工具使用。同时你仍然可以让 FastAPI 使用 `response_model` 进行数据校验、文档等。

你也可以使用 `response_model=None` 来禁用该*路径操作*的响应模型生成；当你为一些不是有效 Pydantic 字段的东西添加类型注解时，可能需要这样做，下面的章节会有示例。

## 返回与输入相同的数据 { #return-the-same-input-data }

这里我们声明一个 `UserIn` 模型，它包含一个明文密码：

{* ../../docs_src/response_model/tutorial002_py310.py hl[7,9] *}

/// info | 信息

			ObjectName:      object,
		}) {
			// Request is allowed return the appropriate access key.
			return ErrNone
		}

		if action == policy.ListBucketVersionsAction {
			// In AWS S3 s3:ListBucket permission is same as s3:ListBucketVersions permission
			// verify as a fallback.
			if globalPolicySys.IsAllowed(policy.BucketPolicyArgs{
				AccountName:     cred.AccessKey,
				Groups:          cred.Groups,

 * collector by only using a constant number of internal objects.
 *
 * <p>If there are no removals, then iteration order for the {@link #entrySet}, {@link #keySet}, and
 * {@link #values} views is the same as insertion order. Any removal invalidates any ordering
 * guarantees.
 *
 * <p>This class should not be assumed to be universally superior to {@code java.util.HashMap}.

        String[] roles2 = secured.value();

        // Different array instances should be returned
        assertNotSame(roles1, roles2);

        // But values should be the same
        assertEquals(roles1.length, roles2.length);
        for (int i = 0; i < roles1.length; i++) {
            assertEquals(roles1[i], roles2[i]);
        }
    }

    // Test annotation with duplicate roles

    } catch (AssertionFailedError e) {
      assertErrorMessage(e, "foo [group 1, item 1] must be Object#equals to bar [group 1, item 2]");
      return;
    }
    fail("should failed because of unequal objects in the same equality group");
  }

  public void testTransitivityBrokenAcrossEqualityGroups() {
    EqualsTester tester =
        new EqualsTester()