Struct Header 

pub struct Header {
    pub opcode: Option<Opcode>,
    pub opcode_byte: u8,
    pub key_len: u16,
    pub extras_len: u8,
    pub body_len: u32,
    pub opaque: u32,
    pub cas: u64,
}

Parsed memcached binary-protocol request header.

Contains both the parsed Opcode (if recognised) and the raw opcode byte, plus all fixed-width header fields.

Fields

opcode: Option<Opcode>

Parsed opcode, or None if the opcode byte is not recognised.

opcode_byte: u8

Raw opcode byte from the wire — always available even when the opcode is unknown, so we can echo it in error responses.

key_len: u16

extras_len: u8

body_len: u32

opaque: u32

cas: u64

Implementations

impl Header

pub fn parse(buf: &[u8]) -> Option<Self>

Parse a request header from the front of buf.

Returns None only when the buffer is too short to contain a header. A wrong magic byte or unknown opcode is reported via ParseResult by try_parse_request.

Trait Implementations

impl Debug for Header

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.