const (
	// browserCSPPolicy setting name for Content-Security-Policy response header value
	browserCSPPolicy = "csp_policy"
	// browserHSTSSeconds setting name for Strict-Transport-Security response header, amount of seconds for 'max-age'
	browserHSTSSeconds = "hsts_seconds"
	// browserHSTSIncludeSubdomains setting name for Strict-Transport-Security response header 'includeSubDomains' flag (true or false)

from fastapi import FastAPI, Header

app = FastAPI()


@app.get("/items/")
async def read_items(user_agent: str | None = Header(default=None)):

    /** Command offset in SMB header */
    int CMD_OFFSET = 4;
    /** Error code offset in SMB header */
    int ERROR_CODE_OFFSET = 5;
    /** Flags offset in SMB header */
    int FLAGS_OFFSET = 9;
    /** Signature offset in SMB header */
    int SIGNATURE_OFFSET = 14;
    /** TID offset in SMB header */
    int TID_OFFSET = 24;
    /** SMB header length */
    int HEADER_LENGTH = 32;

@app.get("/header_examples/")
def header_examples(
    data: str | None = Header(
        default=None,
        examples=[
            "json_schema_header1",
            "json_schema_header2",
        ],
        openapi_examples={
            "Header One": {
                "summary": "Header One Summary",
                "description": "Header One Description",
                "value": "header1",
            },

from typing import Annotated

from fastapi import FastAPI, Header

app = FastAPI()


@app.get("/items/")
async def read_items(
    strange_header: Annotated[str | None, Header(convert_underscores=False)] = None,
):

        return asStream(id)//
                .header("Pragma", "no-cache")//
                .header("Cache-Control", "no-cache")//
                .header("Expires", "Thu, 01 Dec 1994 16:00:00 GMT")//
                .header("Content-Type", "application/x-ndjson")//
                .stream(out -> {

        assertEquals(leaseContext.size(), encoded);

        // Verify context header structure according to MS-SMB2
        // Next field (4 bytes) - should be 0 for last/single context
        assertEquals(0, SMBUtil.readInt4(buffer, 0));

        // NameOffset field (2 bytes) - should be 16 (after header)
        assertEquals(16, SMBUtil.readInt2(buffer, 4));

| xlHeaderVersion | msgp uint                   | header version identifier
| xlMetaVersion   | msgp uint                   | metadata version identifier
| versions        | msgp int                    | Number of versions following
| header_1        | msgp bin array              | Header of version 1
| metadata_1      | msgp bin array              | Metadata of version 1

// hence the calculation is made accordingly.
func totalByteLength(headerLength, payloadLength int) int {
	return 4 + 4 + 4 + headerLength + payloadLength + 4
}

func genMessage(header, payload []byte) []byte {
	headerLength := len(header)
	payloadLength := len(payload)
	totalLength := totalByteLength(headerLength, payloadLength)

	buf := new(bytes.Buffer)
	binary.Write(buf, binary.BigEndian, uint32(totalLength))

 * Tests the NetBIOS session layer protocol implementation.
 */
@ExtendWith(MockitoExtension.class)
class SocketInputStreamTest {

    /**
     * Creates a NetBIOS session message header.
     * The header format is:
     * - Byte 0: Message type (0x00 for SESSION_MESSAGE)
     * - Byte 1: High bit of 17-bit length field
     * - Bytes 2-3: Lower 16 bits of length field
     */