Struct FrameDecoder 

pub struct FrameDecoder { /* private fields */ }

Available on crate features http-backend and http and std only.

A bounded, incremental HTTP/3 frame decoder.

Implementations

impl FrameDecoder

pub fn new(max_frame_size: usize) -> FrameDecoder

Create a decoder that buffers at most max_frame_size bytes for any single non-DATA frame.

pub fn with_input_limit( max_frame_size: usize, max_input_size: usize, ) -> FrameDecoder

Set independent limits for a buffered frame and a single input chunk.

At most one input chunk is retained. Poll until more input is needed before feeding again. A zero input limit accepts only empty chunks.

pub fn feed(&mut self, input: &[u8]) -> Result<(), FrameError>

Copy a received chunk, rejecting it before allocation if the inbox is occupied or the chunk exceeds the input limit. Poll until Ok(None) and retry; split oversized chunks. Prefer Self::feed_bytes to avoid this copy.

pub fn feed_bytes(&mut self, input: &mut Bytes) -> Result<(), FrameError>

Transfer an owned received chunk without copying. On success input becomes empty; on backpressure it is unchanged, so the caller can drain the decoder and retry or split it.

pub fn is_at_frame_boundary(&self) -> bool

Whether the decoder is between frames with nothing buffered — i.e. a clean place for the stream to end. If this is false at end of stream, the stream was truncated mid-frame.

pub fn poll(&mut self) -> Result<Option<FrameEvent>, FrameError>

Try to produce the next event. Returns Ok(None) when more input is required.