## Use `CORSMiddleware` { #use-corsmiddleware }

You can configure it in your **FastAPI** application using the `CORSMiddleware`.

* Import `CORSMiddleware`.
* Create a list of allowed origins (as strings).
* Add it as a "middleware" to your **FastAPI** application.

You can also specify whether your backend allows:

            assertTrue(e.getMessage().contains("not allowed"));
        }

        // Should allow other paths
        String allowed = validator.validatePath("\\share\\allowed\\file.txt");
        assertEquals("\\share\\allowed\\file.txt", allowed);
    }

    @Test
    public void testWhitelist() throws Exception {
        validator.addToWhitelist("\\share\\allowed");

        // Should allow whitelisted path

            return userAgent;
        }

        /**
         * Checks if the given path is allowed according to this directive.
         * @param path the path to check
         * @return true if the path is allowed, false otherwise
         */
        public boolean allows(final String path) {
            for (final String allowedPath : allowedPaths) {
                if (path.startsWith(allowedPath)) {

        // Normal authentication should be allowed
        assertTrue(rateLimiter.checkAttempt("user1", "192.168.1.1"), "First attempt should be allowed");

        // Record success
        rateLimiter.recordSuccess("user1", "192.168.1.1");

        // Should still be allowed
        assertTrue(rateLimiter.checkAttempt("user1", "192.168.1.1"), "After success should be allowed");
    }

    @Test

	// ErrPreloadNotAllowed preload is not allowed when count is used
	ErrPreloadNotAllowed = errors.New("preload is not allowed when count is used")
	// ErrDuplicatedKey occurs when there is a unique key constraint violation
	ErrDuplicatedKey = errors.New("duplicated key not allowed")
	// ErrForeignKeyViolated occurs when there is a foreign key constraint violation

	if s3Err != ErrNone {
		return cred, s3Err
	}
	if globalIAMSys.IsAllowed(policy.Args{
		AccountName:     cred.AccessKey,
		Groups:          cred.Groups,
		Action:          policy.Action(action),
		ConditionValues: getConditionValues(r, "", cred),
		IsOwner:         owner,
		Claims:          cred.Claims,
	}) {
		// Request is allowed return the appropriate access key.
		return cred, ErrNone
	}

    "--connect-timeout",
  ).help(
    "Maximum time allowed for connection (seconds)",
  ).int()
    .default(DEFAULT_TIMEOUT)

  val readTimeout: Int by option("--read-timeout")
    .help("Maximum time allowed for reading data (seconds)")
    .int()
    .default(DEFAULT_TIMEOUT)

  val callTimeout: Int by option(
    "--call-timeout",
  ).help(
    "Maximum time allowed for the entire call (seconds)",
  ).int()

    }
    expectUnchanged();
  }

  @MapFeature.Require(absent = SUPPORTS_PUT)
  public void testReplaceEntry_unsupportedAbsentKey() {
    try {
      getMap().replace(k3(), v3(), v4());
    } catch (UnsupportedOperationException tolerated) {
      // the operation would be a no-op, so exceptions are allowed but not required
    }
    expectUnchanged();

    }
    expectUnchanged();
  }

  @MapFeature.Require(absent = SUPPORTS_PUT)
  public void testReplaceEntry_unsupportedAbsentKey() {
    try {
      getMap().replace(k3(), v3(), v4());
    } catch (UnsupportedOperationException tolerated) {
      // the operation would be a no-op, so exceptions are allowed but not required
    }
    expectUnchanged();

    }

    /**
     * CORS header for specifying allowed origin.
     */
    protected static final String ACCESS_CONTROL_ALLOW_ORIGIN = "Access-Control-Allow-Origin";

    /**
     * CORS header for specifying allowed headers.
     */
    protected static final String ACCESS_CONTROL_ALLOW_HEADERS = "Access-Control-Allow-Headers";

    /**
     * CORS header for specifying allowed HTTP methods.
     */