There are some situations in where it's useful to be able to add custom headers to the HTTP error. For example, for some types of security.

You probably won't need to use it directly in your code.

But in case you needed it for an advanced scenario, you can add custom headers:

{* ../../docs_src/handling_errors/tutorial002.py hl[14] *}

## Install custom exception handlers { #install-custom-exception-handlers }

Here I'm also highlighting contributions from sponsors.

  fun checkLowercase(name: ByteString): ByteString {
    for (i in 0 until name.size) {
      if (name[i] in 'A'.code.toByte()..'Z'.code.toByte()) {
        throw IOException("PROTOCOL_ERROR response malformed: mixed case name: ${name.utf8()}")
      }
    }
    return name
  }

	// We must not use the http.Header().Set method here because some (broken)
	// clients expect the ETag header key to be literally "ETag" - not "Etag" (case-sensitive).
	// Therefore, we have to set the ETag directly as map entry.
	if objInfo.ETag != "" && !del {
		w.Header()[xhttp.ETag] = []string{`"` + objInfo.ETag + `"`}
	}

        testData.add(createRelatedQuery("Java", new String[] { "Programming", "Tutorial" }, ""));
        mockBhv.setTestData(testData);

        relatedQueryHelper.load();

        // Test case insensitive matching
        String[] results = relatedQueryHelper.getRelatedQueries("java");
        assertEquals(2, results.length);
        assertEquals("Programming", results[0]);

@NullMarked
public final class GcFinalization {
  private GcFinalization() {}

  /**
   * 10 seconds ought to be long enough for any object to be GC'ed and finalized. Unless we have a
   * gigantic heap, in which case we scale by heap size.
   */
  private static long timeoutSeconds() {
    // This class can make no hard guarantees.  The methods in this class are inherently flaky, but

            // Then
            assertEquals(4, read1);
            assertEquals(4, read2);
        }
    }

    @Nested
    @DisplayName("Edge case tests")
    class EdgeCaseTests {

        @Test
        @DisplayName("Should handle maximum buffer index")
        void testMaxBufferIndex() throws SMBProtocolDecodingException {
            // Given

@NullMarked
public final class GcFinalization {
  private GcFinalization() {}

  /**
   * 10 seconds ought to be long enough for any object to be GC'ed and finalized. Unless we have a
   * gigantic heap, in which case we scale by heap size.
   */
  private static long timeoutSeconds() {
    // This class can make no hard guarantees.  The methods in this class are inherently flaky, but

        if (expectEqual) {
            assertEquals(hA, hB);
            assertEquals(hA.hashCode(), hB.hashCode());
        } else {
            assertNotEquals(hA, hB);
        }

        // Test negative case with different tree id handles
        SmbTreeHandleImpl tC = mock(SmbTreeHandleImpl.class);
        lenient().when(tC.acquire()).thenReturn(tC);
        lenient().when(tC.getTreeId()).thenReturn(treeId + 1);

    }

    @Test
    void toString_shouldReturnExpectedFormat_withNullAddrEntry() throws NoSuchFieldException, IllegalAccessException {
        // Set 'addrEntry' field to null for this test case
        Field addrEntryField = NameServicePacket.class.getDeclaredField("addrEntry");
        addrEntryField.setAccessible(true);
        addrEntryField.set(nameQueryResponse, null);