)

    async def __call__(self, request: Request) -> HTTPAuthorizationCredentials | None:
        authorization = request.headers.get("Authorization")
        scheme, credentials = get_authorization_scheme_param(authorization)
        if not (authorization and scheme and credentials):
            if self.auto_error:
                raise self.make_not_authenticated_error()
            else:

        req.addHeader("Authorization", "Bearer " + token);
        assertEquals(token, accessTokenHelper.getAccessTokenFromRequest(req));
    }

    @Test
    public void test_getAccessTokenFromRequest_ok1() {
        final String token = accessTokenHelper.generateAccessToken();
        MockletHttpServletRequest req = getMockRequest();
        req.addHeader("Authorization", token);

    /**
     * Test case for when the 'Authorization' header is missing.
     * Expects the server to respond with a 'WWW-Authenticate: NTLM' header and a 401 status.
     * @throws IOException
     */
    @Test
    public void testAuthenticate_NoAuthorizationHeader() throws IOException {
        // Setup: No "Authorization" header
        when(mockRequest.getHeader("Authorization")).thenReturn(null);

        // Execute

        )

    async def __call__(self, request: Request) -> str | None:
        authorization = request.headers.get("Authorization")
        if not authorization:
            if self.auto_error:
                raise self.make_not_authenticated_error()
            else:
                return None

        }).orElse(null);
    }

    /**
     * Gets the authorization URL for OpenID Connect.
     *
     * @param request the HTTP servlet request
     * @return the authorization URL
     */
    protected String getAuthUrl(final HttpServletRequest request) {
        final String state = UuidUtil.create();

		expectedErr error
	}{
		// Set valid authorization header.
		{
			req: &http.Request{
				Header: http.Header{
					"Authorization": []string{token},
				},
			},
			expectedErr: nil,
		},
		// No authorization header.
		{
			req: &http.Request{
				Header: http.Header{},
			},
			expectedErr: errNoAuthToken,
		},
		// Invalid authorization token.
		{
			req: &http.Request{

        // Initialize filter first
        initializeFilter();

        // Test request without Authorization header should challenge client
        when(request.getHeader("Authorization")).thenReturn(null);
        when(httpSession.getAttribute("NtlmHttpAuth")).thenReturn(null);

        filter.doFilter(request, response, filterChain);

        )

    async def __call__(self, request: Request) -> str | None:
        authorization = request.headers.get("Authorization")
        if not authorization:
            if self.auto_error:
                raise self.make_not_authenticated_error()
            else:
                return None
        return authorization


class OAuth2PasswordBearer(OAuth2):
    """

    * This automatic discovery is what is defined in the OpenID Connect specification.


/// tip

Integrating other authentication/authorization providers like Google, Facebook, X (Twitter), GitHub, etc. is also possible and relatively easy.

The most complex problem is building an authentication/authorization provider like those, but **FastAPI** gives you the tools to do it easily, while doing the heavy lifting for you.

///

client = TestClient(app)


def test_root():
    response = client.get("/", headers={"Authorization": "Bearer testtoken"})
    assert response.status_code == 200, response.text
    assert response.json() == {"message": "Hello World"}


def test_read_with_oauth2_scheme():
    response = client.get(
        "/with-oauth2-scheme", headers={"Authorization": "Bearer testtoken"}
    )
    assert response.status_code == 200, response.text