147 lines
4.2 KiB
Rust
147 lines
4.2 KiB
Rust
/*
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* This file is part of espanso.
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*
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* Copyright (C) 2019-2021 Federico Terzi
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*
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* espanso 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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*
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* espanso 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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*
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* You should have received a copy of the GNU General Public License
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* along with espanso. If not, see <https://www.gnu.org/licenses/>.
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*/
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use anyhow::Result;
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use log::{error, info};
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use named_pipe::{ConnectingServer, PipeClient, PipeOptions};
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use serde::{de::DeserializeOwned, Serialize};
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use std::{io::{Write}};
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use crate::util::read_line;
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use crate::{
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EventHandler, EventHandlerResponse, IPCClient, IPCClientError, IPCServer,
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};
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const DEFAULT_CLIENT_TIMEOUT: u32 = 2000;
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pub struct WinIPCServer {
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server: Option<ConnectingServer>,
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}
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impl WinIPCServer {
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pub fn new(id: &str) -> Result<Self> {
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let pipe_name = format!("\\\\.\\pipe\\{}", id);
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let options = PipeOptions::new(&pipe_name);
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let server = Some(options.single()?);
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info!("binded to named pipe: {}", pipe_name);
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Ok(Self { server })
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}
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}
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impl<Event: Send + Sync + DeserializeOwned + Serialize> IPCServer<Event> for WinIPCServer {
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fn run(mut self, handler: EventHandler<Event>) -> anyhow::Result<()> {
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let server = self
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.server
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.take()
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.expect("unable to extract IPC server handle");
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let mut stream = server.wait()?;
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loop {
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// Read multiple commands from the client
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loop {
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match read_line(&mut stream) {
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Ok(Some(line)) => {
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let event: Result<Event, serde_json::Error> = serde_json::from_str(&line);
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match event {
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Ok(event) => match handler(event) {
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EventHandlerResponse::Response(response) => {
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let mut json_event = serde_json::to_string(&response)?;
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json_event.push('\n');
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stream.write_all(json_event.as_bytes())?;
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stream.flush()?;
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}
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EventHandlerResponse::NoResponse => {
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// Async event, no need to reply
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}
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EventHandlerResponse::Error(err) => {
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error!("ipc handler reported an error: {}", err);
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}
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EventHandlerResponse::Exit => {
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return Ok(());
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}
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},
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Err(error) => {
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error!("received malformed event from ipc stream: {}", error);
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break;
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}
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}
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}
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Ok(None) => {
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// EOF reached
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break;
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}
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Err(error) => {
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error!("error reading ipc stream: {}", error);
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break;
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}
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}
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}
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stream = stream.disconnect()?.wait()?;
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}
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}
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}
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pub struct WinIPCClient {
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stream: PipeClient,
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}
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impl WinIPCClient {
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pub fn new(id: &str) -> Result<Self> {
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let pipe_name = format!("\\\\.\\pipe\\{}", id);
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let stream = PipeClient::connect_ms(&pipe_name, DEFAULT_CLIENT_TIMEOUT)?;
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Ok(Self { stream })
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}
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}
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impl<Event: Serialize + DeserializeOwned> IPCClient<Event> for WinIPCClient {
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fn send_sync(&mut self, event: Event) -> Result<Event> {
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{
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let mut json_event = serde_json::to_string(&event)?;
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json_event.push('\n');
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self.stream.write_all(json_event.as_bytes())?;
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self.stream.flush()?;
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}
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// Read the response
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if let Some(line) = read_line(&mut self.stream)? {
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let event: Result<Event, serde_json::Error> = serde_json::from_str(&line);
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match event {
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Ok(response) => Ok(response),
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Err(err) => Err(IPCClientError::MalformedResponse(err.into()).into()),
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}
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} else {
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Err(IPCClientError::EmptyResponse.into())
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}
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}
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fn send_async(&mut self, event: Event) -> Result<()> {
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let mut json_event = serde_json::to_string(&event)?;
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json_event.push('\n');
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self.stream.write_all(json_event.as_bytes())?;
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self.stream.flush()?;
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Ok(())
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}
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}
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