Fortune for transfer's current commit: Future small blessing − 末小吉basic
parent
035dabf869
commit
40656d6cc3
GPG Key ID:
284488987C31F630
@ -0,0 +1,217 @@
|
||||
//! Encodings
|
||||
use super::*;
|
||||
use std::{fmt, error};
|
||||
use bytes::{
|
||||
Buf,
|
||||
Bytes,
|
||||
};
|
||||
use std::io;
|
||||
use tokio::io::{
|
||||
AsyncRead, AsyncWrite,
|
||||
AsyncReadExt, AsyncWriteExt,
|
||||
};
|
||||
use serde::{
|
||||
Serialize,
|
||||
Deserialize
|
||||
};
|
||||
|
||||
#[derive(Debug, Clone, PartialEq, Eq, Hash, Copy, PartialOrd, Ord)]
|
||||
pub enum CompressionKind
|
||||
{
|
||||
Brotli,
|
||||
Xz,
|
||||
GZip,
|
||||
}
|
||||
|
||||
impl Default for CompressionKind
|
||||
{
|
||||
#[inline]
|
||||
fn default() -> Self
|
||||
{
|
||||
Self::Brotli
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Debug, Clone, PartialEq, Eq, Hash, Copy)]
|
||||
pub enum EncryptionKind
|
||||
{
|
||||
Chacha20((key::Key, key::IV))
|
||||
}
|
||||
|
||||
impl Default for EncryptionKind
|
||||
{
|
||||
#[inline]
|
||||
fn default() -> Self
|
||||
{
|
||||
Self::Chacha20(cha::keygen())
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Debug, Clone, PartialEq, Eq, Hash, Copy)]
|
||||
pub enum SerialFormat
|
||||
{
|
||||
/// CBOR
|
||||
Binary,
|
||||
/// JSON
|
||||
Text,
|
||||
}
|
||||
|
||||
impl Default for SerialFormat
|
||||
{
|
||||
#[inline]
|
||||
fn default() -> Self
|
||||
{
|
||||
Self::Binary
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Debug, Clone, PartialEq, Eq, Hash, Copy)]
|
||||
pub struct SendOpt
|
||||
{
|
||||
pub comp: Option<CompressionKind>,
|
||||
pub encrypt: Option<EncryptionKind>,
|
||||
pub format: SerialFormat,
|
||||
}
|
||||
|
||||
pub const DEFAULT_BUFSIZE: usize = 4096;
|
||||
|
||||
pub async fn cha_copy<F, T, const BUFSIZE: usize, const DECRYPT: bool>(from: &mut F, to: &mut T, key: &key::Key, iv: &key::IV) -> io::Result<(usize, usize)>
|
||||
where F: AsyncRead + Unpin + ?Sized,
|
||||
T: AsyncWrite + Unpin + ?Sized
|
||||
{
|
||||
let mut written=0;
|
||||
let mut read=0;
|
||||
let mut r;
|
||||
let mut buffer = [0u8; BUFSIZE];
|
||||
let mut cbuffer = [0u8; BUFSIZE];
|
||||
|
||||
let mut crypter = if DECRYPT {
|
||||
cha::decrypter(key, iv)
|
||||
} else {
|
||||
cha::encrypter(key, iv)
|
||||
}?;
|
||||
|
||||
while { r = from.read(&mut buffer[..]).await?; r > 0 } {
|
||||
read += r;
|
||||
r = crypter.update(&buffer[..r], &mut cbuffer[..])?;
|
||||
to.write(&cbuffer[..r]).await?;
|
||||
written += r;
|
||||
}
|
||||
|
||||
Ok((written, read))
|
||||
}
|
||||
|
||||
async fn ser_singleton_inner<T: Serialize>(value: &T, how: &SendOpt) -> Result<Vec<u8>, SendErrorKind>
|
||||
{
|
||||
let ser = match how.format {
|
||||
SerialFormat::Text => serde_json::to_vec(value)?,
|
||||
SerialFormat::Binary => serde_cbor::to_vec(value)?,
|
||||
};
|
||||
let mut a;
|
||||
let mut b;
|
||||
let reader: &mut (dyn AsyncRead + Unpin) =
|
||||
if let Some(comp) = &how.comp {
|
||||
match comp {
|
||||
CompressionKind::Brotli => {
|
||||
a = async_compression::tokio::bufread::BrotliEncoder::new(tokio::io::BufReader::new(&ser[..]));
|
||||
&mut a
|
||||
},
|
||||
_ => unimplemented!("Xz and GZip currently unimplemented."),
|
||||
}
|
||||
} else {
|
||||
b = &ser[..];
|
||||
&mut b
|
||||
};
|
||||
let mut ser = Vec::with_capacity(ser.len());
|
||||
if let Some(enc) = &how.encrypt {
|
||||
match enc {
|
||||
EncryptionKind::Chacha20((k, iv)) => {
|
||||
self::cha_copy::<_, _, 4096, false>(reader, &mut ser, k, iv).await?;
|
||||
},
|
||||
}
|
||||
} else {
|
||||
tokio::io::copy(reader, &mut ser).await?;
|
||||
}
|
||||
Ok(ser)
|
||||
// inner(value, how).map(|res| res.map_err(|k| SendError(Box::new((k, how.clone())))))
|
||||
}
|
||||
|
||||
#[inline(always)] pub fn ser_singleton<'a, T: Serialize>(value: &'a T, how: &'a SendOpt) -> impl Future<Output = Result<Vec<u8>, SendError>> + 'a
|
||||
{
|
||||
use futures::prelude::*;
|
||||
// hack to avoid having to enable `try{}` feature :/
|
||||
ser_singleton_inner(value, how).map_err(|k| SendError(Box::new((k, how.clone()))))
|
||||
}
|
||||
|
||||
pub async fn write_singleton<T: Serialize, S: ?Sized + AsyncWrite + Unpin>(to: &mut S, value: &T, how: &SendOpt) -> Result<usize, SendError>
|
||||
{
|
||||
Ok(0)
|
||||
}
|
||||
|
||||
|
||||
#[derive(Debug)]
|
||||
pub enum SendErrorKind
|
||||
{
|
||||
/// Invalid serialised format
|
||||
Format,
|
||||
/// Compression
|
||||
Compress,
|
||||
/// Encryption
|
||||
Encrypt,
|
||||
/// Misc. IO
|
||||
//TODO: Disambiguate when this happens into the two above cases.
|
||||
IO(io::Error),
|
||||
}
|
||||
|
||||
#[derive(Debug)]
|
||||
pub struct SendError(Box<(SendErrorKind, SendOpt)>);
|
||||
|
||||
impl error::Error for SendError
|
||||
{
|
||||
fn source(&self) -> Option<&(dyn error::Error + 'static)> {
|
||||
Some(match &self.0.0
|
||||
{
|
||||
SendErrorKind::IO(io) => io,
|
||||
_ => return None,
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
impl fmt::Display for SendError
|
||||
{
|
||||
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
|
||||
{
|
||||
write!(f, "error when serialising object with params {:?}: ", self.0.1)?;
|
||||
match self.0.0 {
|
||||
SendErrorKind::Format => write!(f, "failed to serialise object to data"),
|
||||
SendErrorKind::Compress => write!(f, "failed to compress data"),
|
||||
SendErrorKind::Encrypt => write!(f, "failed to encrypt data"),
|
||||
SendErrorKind::IO(_) => write!(f, "i/o failure"),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl From<io::Error> for SendErrorKind
|
||||
{
|
||||
fn from(from: io::Error) -> Self
|
||||
{
|
||||
Self::IO(from)
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
impl From<serde_cbor::Error> for SendErrorKind
|
||||
{
|
||||
#[inline] fn from(_: serde_cbor::Error) -> Self
|
||||
{
|
||||
Self::Format
|
||||
}
|
||||
}
|
||||
|
||||
impl From<serde_json::Error> for SendErrorKind
|
||||
{
|
||||
#[inline] fn from(_: serde_json::Error) -> Self
|
||||
{
|
||||
Self::Format
|
||||
}
|
||||
}
|
||||
Loading…
Reference in new issue