# 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).

/**
 * SMB1 Find Close2 request message.
 *
 * This command is used to close a search handle that was
 * opened by a Trans2 Find First2 request.
 */
public class SmbComFindClose2 extends ServerMessageBlock {

    private final int sid;

    /**
     * Creates a new SMB1 find close request to close a search handle.
     *
     * @param config the CIFS configuration
     * @param sid the search identifier to close

     */
    boolean generate(String thumbnailId, File outputFile);

    /**
     * Checks if this generator can handle the given document.
     * @param docMap The document map containing metadata.
     * @return True if this generator can handle the document, false otherwise.
     */
    boolean isTarget(Map<String, Object> docMap);

    /**

			return FileInfoVersions{}, err
		}
		versions, err = xlMeta.ListVersions(volume, path, allParts)
	}
	if err == nil && len(versions) == 0 {
		// This special case is needed to handle len(xlMeta.versions) == 0
		versions = []FileInfo{
			{
				Volume:   volume,
				Name:     path,
				Deleted:  true,
				IsLatest: true,
				ModTime:  timeSentinel1970,
			},
		}
	}
	if err != nil {

        assertNotNull(request);
    }

    @Test
    @DisplayName("Constructor should handle null filename")
    void testConstructorWithNullFilename() {
        // When & Then
        assertDoesNotThrow(() -> new Trans2GetDfsReferral(mockConfig, null));
    }

    @Test
    @DisplayName("Constructor should handle empty filename")
    void testConstructorWithEmptyFilename() {
        // When & Then

        try {
            dataIndexHelper.crawl("test-session-force-stop");
            assertTrue("Should exit quickly when force stopped", true);
        } catch (Exception e) {
            assertTrue("Force stop should handle exceptions quickly", true);
        }
    }

    public void test_crawl_with_short_intervals() {
        try {
            // Test with minimal interval

     *
     * @param process the system process to wrap
     * @param bufferSize the buffer size for reading process output
     * @param outputCallback the callback function to handle process output lines
     */
    public JobProcess(final Process process, final int bufferSize, final Consumer<String> outputCallback) {
        this.process = process;

                assertEquals(testByte, buffer[i], "Byte at position " + i + " was modified");
            }
        }

        @Test
        @DisplayName("Should handle encoding at buffer boundary")
        void testEncodeAtBufferBoundary() {
            // Given
            byte[] exactBuffer = new byte[EXPECTED_SIZE];
            SrvCopychunk chunk = new SrvCopychunk(999L, 888L, 777);

## `Depends()`

Dependencies are handled mainly with the special function `Depends()` that takes a callable.

Here is the reference for it and its parameters.

You can import it directly from `fastapi`:

```python
from fastapi import Depends
```

::: fastapi.Depends

## `Security()`

      // Runnable is executed more than once, allocate a wrapper that we know is safe to remove by
      // object identity.
      // A data structure that returned a removal handle from add() would allow eliminating this
      // allocation.
      submittedTask =
          new Runnable() {
            @Override
            public void run() {
              task.run();
            }