{* ../../docs_src/stream_data/tutorial001_py310.py ln[44:47] hl[47] *}

## Um `PNGStreamingResponse` personalizado { #a-custom-pngstreamingresponse }

Nos exemplos acima, os bytes eram transmitidos, mas a resposta não tinha um cabeçalho `Content-Type`, então o cliente não sabia que tipo de dado estava recebendo.

import jcifs.internal.util.SMBUtil;

@ExtendWith(MockitoExtension.class)
class Smb2CreateResponseTest {

    // SMB2 header size in bytes
    private static final int SMB2_HEADER_LENGTH = 64;

    /**
     * Build a minimal SMB2 header for a response.
     */
    private static byte[] buildSmb2Header() {
        byte[] header = Arrays.copyOf(SMBUtil.SMB2_HEADER, SMBUtil.SMB2_HEADER.length);
        // Mark as server->client response for realism

 * These tests verify that the constructor accepts various parameters
 * without throwing exceptions.
 */
@ExtendWith(MockitoExtension.class)
class MsrpcSamrConnect2Test {

    // Helper method to create a minimal SamrPolicyHandle instance.
    private static SamrPolicyHandle createMockPolicyHandle() {
        return mock(SamrPolicyHandle.class);
    }

    @Nested
    @DisplayName("Constructor parameter handling")

def say_hi(name: Union[str, None]):
        print(f"Hi {name}!")
```

`typing`, bir şeyin `None` olabileceğini belirtmek için `Optional` ile bir kısayol da sunar.

Benim oldukça öznel bakış açıma göre küçük bir ipucu:

- 🚨 `Optional[SomeType]` kullanmaktan kaçının
- Bunun yerine ✨ **`Union[SomeType, None]` kullanın** ✨.

        SMBUtil.writeInt2(dataOffset, buffer, bufferIndex + 2);
        // Set buffer length
        SMBUtil.writeInt4(104, buffer, bufferIndex + 4); // Minimal FileBothDirectoryInfo

        response = spy(response);
        when(response.getHeaderStart()).thenReturn(0);

        // Write minimal FileBothDirectoryInfo at dataOffset
        // NextEntryOffset (0 = last entry)
        SMBUtil.writeInt4(0, buffer, dataOffset);

   * document's character encoding can encode any non-ASCII code points in the input (as UTF-8 and
   * other Unicode encodings can).
   *
   * <p><b>Note:</b> This escaper only performs minimal escaping to make content structurally
   * compatible with HTML. Specifically, it does not perform entity replacement (symbolic or
   * numeric), so it does not replace non-ASCII code points with character references. This escaper

**JVM version** (`java -version`):

**OS version** (`uname -a` if on a Unix-like system):

**Description of the problem including expected versus actual behavior**:

**Steps to reproduce**:

Please include a *minimal* but *complete* recreation of the problem,
including (e.g.) index creation, mappings, settings, query etc.  The easier
you make for us to reproduce it, the more likely that somebody will take the
time to look at it.

 1.

Wenn eine Ihrer Abhängigkeiten mehrmals für dieselbe *Pfadoperation* deklariert wird, beispielsweise wenn mehrere Abhängigkeiten eine gemeinsame Unterabhängigkeit haben, wird **FastAPI** diese Unterabhängigkeit nur einmal pro <abbr title="Request – Anfrage: Daten, die der Client zum Server sendet">Request</abbr> aufrufen.

        assertTrue(str.contains("filename=testfile.txt"), "toString must contain the supplied filename");
    }

    @Test
    @DisplayName("writeBytesWireFormat with null path returns minimal bytes")
    void testWriteWhenPathIsNull() {
        // When path is null, Strings.getOEMBytes returns empty array, not NPE
        when(mockConfig.getOemEncoding()).thenReturn("windows-1252");

* Çalıştırıp aynı hatayı/davranışı görebileceğiniz veya kullanım senaryosunu daha iyi anlayabileceğiniz, yerelde **kopyala-yapıştır** yaparak çalıştırılabilen bir [minimal, reproducible, example](https://stackoverflow.com/help/minimal-reproducible-example) paylaşmalarını isteyebilirsiniz.