# Security { #security }

There are many ways to handle security, authentication and authorization.

And it normally is a complex and "difficult" topic.

In many frameworks and systems just handling security and authentication takes a big amount of effort and code (in many cases it can be 50% or more of all the code written).

 * @since 20.0
 */
@Beta
public interface MutableNetwork<N, E> extends Network<N, E> {

  /**
   * Adds {@code node} if it is not already present.
   *
   * <p><b>Nodes must be unique</b>, just as {@code Map} keys must be. They must also be non-null.
   *
   * @return {@code true} if the network was modified as a result of this call
   */
  @CanIgnoreReturnValue
  boolean addNode(N node);

  /**

            copySpec.rename(s -> destinationFile.getName());

            // TODO: Maybe this could be simplified by not using the copy infrastructure and just
            // calling the FilterReader ourselves.  We're just taking one file and turning it into another.

            // The order here is important! tokens are inserted by the transformer
            Map<String, Object> parameters = new HashMap<>();

    val call = client.newCall(request1)
    assertFailsWith<IllegalStateException> {
      call.execute()
    }.also { expected ->
      assertThat(expected.message)
        .isEqualTo("Timeouts can't be adjusted in a network interceptor")
    }
  }

  @Test
  fun networkInterceptorCannotChangeWriteTimeout() {
    addInterceptor(true) { chain: Interceptor.Chain ->
      chain
        .withWriteTimeout(

- Now click on the new project you just created. The URL should be `https://builds.gradle.org/admin/editProject.html?projectId=Gradle_<MyTestBranch>`.
- Click `Versioned Settings` on the left sidebar.
  - Select `Synchronization enabled` - `use settings from VCS` - `MyNewVcsRoot`(the one you just created) - `Settings format: Kotlin`, then `Apply`.

{* ../../docs_src/handling_errors/tutorial006_py39.py hl[2:5,15,21] *}

/// info

The `app.webhooks` object is actually just an `APIRouter`, the same type you would use when structuring your app with multiple files.

///

**FastAPI** provides the same `starlette.responses` as `fastapi.responses` just as a convenience for you, the developer. But most of the available responses come directly from Starlette.

///

## Returning a custom `Response` { #returning-a-custom-response }

        // Initially, lastWriteTime is 0, so createTime should be just the offset.
        assertEquals(serverTimeZoneOffset, response.getCreateTime());
    }

    /**
     * Test of getLastWriteTime method, of class SmbComQueryInformationResponse.
     */
    @Test
    public void testGetLastWriteTime() {
        // Initially, lastWriteTime is 0, so it should return just the offset.

			t.Fatalf("Expected %s , got %s", test.canonicalizedETag, etag)
		}
	}
}

// Tests - CheckPreconditions()
func TestCheckPreconditions(t *testing.T) {
	objModTime := time.Date(2024, time.August, 26, 0o2, 0o1, 0o1, 0, time.UTC)
	objInfo := ObjectInfo{ETag: "aa", ModTime: objModTime}
	testCases := []struct {
		name              string
		ifMatch           string
		ifNoneMatch       string
		ifModifiedSince   string