72 lines
2.2 KiB
Rust
72 lines
2.2 KiB
Rust
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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use std::io;
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use futures::{Future, Poll};
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use tokio_io::AsyncWrite;
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use tokio_io::io::{WriteAll, write_all};
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use ethkey::KeyPair;
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use key_server_cluster::message::Message;
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use key_server_cluster::io::{serialize_message, encrypt_message};
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/// Write plain message to the channel.
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pub fn write_message<A>(a: A, message: Message) -> WriteMessage<A> where A: AsyncWrite {
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let (error, future) = match serialize_message(message)
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.map_err(|e| io::Error::new(io::ErrorKind::Other, e.to_string())) {
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Ok(message) => (None, write_all(a, message.into())),
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Err(error) => (Some(error), write_all(a, Vec::new())),
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};
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WriteMessage {
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error: error,
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future: future,
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}
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}
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/// Write encrypted message to the channel.
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pub fn write_encrypted_message<A>(a: A, key: &KeyPair, message: Message) -> WriteMessage<A> where A: AsyncWrite {
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let (error, future) = match serialize_message(message)
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.and_then(|message| encrypt_message(key, message))
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.map_err(|e| io::Error::new(io::ErrorKind::Other, e.to_string())) {
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Ok(message) => (None, write_all(a, message.into())),
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Err(error) => (Some(error), write_all(a, Vec::new())),
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};
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WriteMessage {
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error: error,
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future: future,
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}
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}
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/// Future message write.
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pub struct WriteMessage<A> {
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error: Option<io::Error>,
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future: WriteAll<A, Vec<u8>>,
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}
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impl<A> Future for WriteMessage<A> where A: AsyncWrite {
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type Item = (A, Vec<u8>);
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type Error = io::Error;
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fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
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if let Some(err) = self.error.take() {
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return Err(err);
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}
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self.future.poll()
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}
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}
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