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use std::fmt;
use bytes::{BufMut, Bytes};
use crate::frame::{self, Error, Head, Kind, Reason, StreamId};
#[derive(Clone, Eq, PartialEq)]
pub struct GoAway {
last_stream_id: StreamId,
error_code: Reason,
debug_data: Bytes,
}
impl GoAway {
pub fn new(last_stream_id: StreamId, reason: Reason) -> Self {
GoAway {
last_stream_id,
error_code: reason,
debug_data: Bytes::new(),
}
}
pub fn with_debug_data(last_stream_id: StreamId, reason: Reason, debug_data: Bytes) -> Self {
Self {
last_stream_id,
error_code: reason,
debug_data,
}
}
pub fn last_stream_id(&self) -> StreamId {
self.last_stream_id
}
pub fn reason(&self) -> Reason {
self.error_code
}
pub fn debug_data(&self) -> &Bytes {
&self.debug_data
}
pub fn load(payload: &[u8]) -> Result<GoAway, Error> {
if payload.len() < 8 {
return Err(Error::BadFrameSize);
}
let (last_stream_id, _) = StreamId::parse(&payload[..4]);
let error_code = unpack_octets_4!(payload, 4, u32);
let debug_data = Bytes::copy_from_slice(&payload[8..]);
Ok(GoAway {
last_stream_id,
error_code: error_code.into(),
debug_data,
})
}
pub fn encode<B: BufMut>(&self, dst: &mut B) {
tracing::trace!("encoding GO_AWAY; code={:?}", self.error_code);
let head = Head::new(Kind::GoAway, 0, StreamId::zero());
head.encode(8 + self.debug_data.len(), dst);
dst.put_u32(self.last_stream_id.into());
dst.put_u32(self.error_code.into());
dst.put(self.debug_data.slice(..));
}
}
impl<B> From<GoAway> for frame::Frame<B> {
fn from(src: GoAway) -> Self {
frame::Frame::GoAway(src)
}
}
impl fmt::Debug for GoAway {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let mut builder = f.debug_struct("GoAway");
builder.field("error_code", &self.error_code);
builder.field("last_stream_id", &self.last_stream_id);
if !self.debug_data.is_empty() {
builder.field("debug_data", &self.debug_data);
}
builder.finish()
}
}