Struct FastAuthWriter 

pub struct FastAuthWriter<W> { /* private fields */ }

An AsyncWrite that can put one AuthMoreData packet in front of the crate’s OK packet.

It is inert — a plain forwarder, no buffering, no parsing — until FastAuthGate::arm is called, which happens at most once per connection and only during the connection phase.

Implementations

impl<W: AsyncWrite + Unpin> FastAuthWriter<W>

pub fn new(inner: W, gate: Arc<FastAuthGate>) -> Self

Trait Implementations

impl<W: AsyncWrite + Unpin> AsyncWrite for FastAuthWriter<W>

fn poll_write_vectored( self: Pin<&mut Self>, cx: &mut Context<'_>, bufs: &[IoSlice<'_>], ) -> Poll<Result<usize>>

Vectored writes go straight through, and that is not an optimisation.

PacketWriter::end_packet hands the header and the payload to one write_vectored. Tokio’s default implementation of this method forwards only the first slice, so a writer that does not implement it turns every MySQL packet into two writes and two segments — the initial greeting then arrives as a 4-byte read followed by the rest. tests/server/mysql/packet_limit_test.rs reads that greeting from a raw socket and fails on it, which is how this was found.

fn poll_write( self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &[u8], ) -> Poll<Result<usize>>

Attempt to write bytes from buf into the object.

fn is_write_vectored(&self) -> bool

Determines if this writer has an efficient poll_write_vectored implementation.

fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<()>>

Attempts to flush the object, ensuring that any buffered data reach their destination.

fn poll_shutdown(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<()>>

Initiates or attempts to shut down this writer, returning success when the I/O connection has completely shut down.

impl<W: Debug> Debug for FastAuthWriter<W>

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

Formats the value using the given formatter.