wmhttp 0.3.1

a http server for rust
Documentation 
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// Copyright 2022 - 2023 Wenmeng See the COPYRIGHT
// file at the top-level directory of this distribution.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//
// Author: tickbh
// -----
// Created Date: 2023/09/14 09:42:25

use std::{
    io,
    pin::Pin,
    task::{ready, Context, Poll},
};

use algorithm::buf::{BinaryMut, Bt};
use tokio::io::{AsyncRead, AsyncWrite, ReadBuf};

#[derive(Debug)]
pub struct FramedWrite<T> {
    /// Upstream `AsyncWrite`
    inner: T,

    binary: BinaryMut,
}

impl<T> FramedWrite<T>
where
    T: AsyncRead + AsyncWrite + Unpin,
{
    pub fn new(io: T) -> Self {
        Self {
            inner: io,
            binary: BinaryMut::new(),
        }
    }

    pub fn into_io(self) -> T {
        self.inner
    }

    pub fn get_mut(&mut self) -> &mut T {
        &mut self.inner
    }

    pub fn get_mut_bytes(&mut self) -> &mut BinaryMut {
        &mut self.binary
    }

    pub fn get_bytes(&self) -> &BinaryMut {
        &self.binary
    }

    pub fn has_capacity(&self) -> bool {
        true
    }

    pub fn poll_ready(&mut self, cx: &mut Context) -> Poll<io::Result<()>> {
        if !self.has_capacity() {
            // Try flushing
            ready!(self.flush(cx))?;

            if !self.has_capacity() {
                return Poll::Pending;
            }
        }

        Poll::Ready(Ok(()))
    }

    pub fn flush(&mut self, cx: &mut Context) -> Poll<io::Result<()>> {
        let span = tracing::trace_span!("FramedWrite::flush");
        let _e = span.enter();
        if !self.binary.has_remaining() {
            return Poll::Ready(Ok(()));
        }

        let n = ready!(Pin::new(&mut self.inner).poll_write(cx, self.binary.chunk()))?;
        self.binary.advance(n);
        Poll::Ready(Ok(()))
    }

    pub fn shutdown(&mut self, cx: &mut Context) -> Poll<io::Result<()>> {
        ready!(self.flush(cx))?;
        Pin::new(&mut self.inner).poll_shutdown(cx)
    }

    pub fn set_cache_buf(&mut self, write_buf: BinaryMut) {
        self.binary.put_slice(write_buf.chunk());
    }

    pub fn is_write_end(&self) -> bool {
        self.binary.is_empty()
    }
}

impl<T: AsyncRead + Unpin> AsyncRead for FramedWrite<T> {
    fn poll_read(
        mut self: Pin<&mut Self>,
        cx: &mut Context<'_>,
        buf: &mut ReadBuf,
    ) -> Poll<io::Result<()>> {
        Pin::new(&mut self.inner).poll_read(cx, buf)
    }
}