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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,171 @@ | ||
| use crate::codec::ConfabCodec; | ||
| use crate::errors::{InetError, InterfaceError, IoError}; | ||
| use crate::events::Event; | ||
| use crate::input::{readline_stream, Input, StartupScript}; | ||
| use crate::tls; | ||
| use crate::util::{now_hms, CharEncoding}; | ||
| use futures::{SinkExt, Stream, StreamExt}; | ||
| use rustyline_async::{Readline, SharedWriter}; | ||
| use std::fs::File; | ||
| use std::io::{self, Write}; | ||
| use std::num::NonZeroUsize; | ||
| use std::process::ExitCode; | ||
| use tokio::net::TcpStream; | ||
| use tokio_util::{codec::Framed, either::Either}; | ||
|
|
||
| type Connection = Framed<Either<TcpStream, tls::TlsStream>, ConfabCodec>; | ||
|
|
||
| pub(crate) struct Runner { | ||
| pub(crate) startup_script: Option<StartupScript>, | ||
| pub(crate) reporter: Reporter, | ||
| pub(crate) connector: Connector, | ||
| } | ||
|
|
||
| impl Runner { | ||
| pub(crate) async fn run(mut self) -> Result<ExitCode, InterfaceError> { | ||
| match self.try_run().await { | ||
| Ok(()) => Ok(ExitCode::SUCCESS), | ||
| Err(IoError::Interface(e)) => Err(e), | ||
| Err(IoError::Inet(e)) => { | ||
| self.reporter.report(Event::error(anyhow::Error::new(e)))?; | ||
| Ok(ExitCode::FAILURE) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| async fn try_run(&mut self) -> Result<(), IoError> { | ||
| let mut frame = self.connector.connect(&mut self.reporter).await?; | ||
| if let Some(script) = self.startup_script.take() { | ||
| ioloop(&mut frame, script, &mut self.reporter).await?; | ||
| } | ||
| let (mut rl, shared) = init_readline()?; | ||
| // Lines written to the SharedWriter are only output when | ||
| // Readline::readline() or Readline::flush() is called, so anything | ||
| // written before we start getting input from the user should be | ||
| // written directly to stdout instead. | ||
| self.reporter.set_writer(Box::new(shared)); | ||
| let r = ioloop( | ||
| &mut frame, | ||
| readline_stream(&mut rl).await, | ||
| &mut self.reporter, | ||
| ) | ||
| .await; | ||
| // TODO: Should this event not be emitted if an error occurs above? | ||
| let r2 = self.reporter.report(Event::disconnect()); | ||
| // Flush after the disconnect event so that we're guaranteed a line in | ||
| // the Readline buffer, leading to the prompt being cleared. | ||
| let _ = rl.flush(); | ||
| drop(rl); | ||
| // Set the writer back to stdout so that errors reported by run() will | ||
| // show up without having to call rl.flush(). | ||
| self.reporter.set_writer(Box::new(io::stdout())); | ||
| r.map_err(Into::into).and(r2.map_err(Into::into)) | ||
| } | ||
| } | ||
|
|
||
| pub(crate) struct Reporter { | ||
| pub(crate) writer: Box<dyn Write + Send>, | ||
| pub(crate) transcript: Option<File>, | ||
| pub(crate) show_times: bool, | ||
| } | ||
|
|
||
| impl Reporter { | ||
| fn set_writer(&mut self, writer: Box<dyn Write + Send>) { | ||
| self.writer = writer; | ||
| } | ||
|
|
||
| fn report(&mut self, event: Event) -> Result<(), InterfaceError> { | ||
| self.report_inner(event).map_err(InterfaceError::Write) | ||
| } | ||
|
|
||
| fn report_inner(&mut self, event: Event) -> Result<(), io::Error> { | ||
| writeln!(self.writer, "{}", event.to_message(self.show_times))?; | ||
| if let Some(fp) = self.transcript.as_mut() { | ||
| if let Err(e) = writeln!(fp, "{}", event.to_json()) { | ||
| let _ = self.transcript.take(); | ||
| if self.show_times { | ||
| write!(self.writer, "[{}] ", now_hms())?; | ||
| } | ||
| writeln!(self.writer, "! Error writing to transcript: {e}")?; | ||
| } | ||
| } | ||
| Ok(()) | ||
| } | ||
|
|
||
| fn echo_ctrlc(&mut self) -> Result<(), InterfaceError> { | ||
| writeln!(self.writer, "^C").map_err(InterfaceError::Write) | ||
| } | ||
| } | ||
|
|
||
| #[derive(Clone, Debug, Eq, PartialEq)] | ||
| pub(crate) struct Connector { | ||
| pub(crate) tls: bool, | ||
| pub(crate) host: String, | ||
| pub(crate) port: u16, | ||
| pub(crate) servername: Option<String>, | ||
| pub(crate) encoding: CharEncoding, | ||
| pub(crate) max_line_length: NonZeroUsize, | ||
| pub(crate) crlf: bool, | ||
| } | ||
|
|
||
| impl Connector { | ||
| async fn connect(&self, reporter: &mut Reporter) -> Result<Connection, IoError> { | ||
| reporter.report(Event::connect_start(&self.host, self.port))?; | ||
| let conn = TcpStream::connect((&*self.host, self.port)) | ||
| .await | ||
| .map_err(InetError::Connect)?; | ||
| reporter.report(Event::connect_finish( | ||
| conn.peer_addr().map_err(InetError::PeerAddr)?, | ||
| ))?; | ||
| let conn = if self.tls { | ||
| reporter.report(Event::tls_start())?; | ||
| let conn = tls::connect(conn, self.servername.as_ref().unwrap_or(&self.host)) | ||
| .await | ||
| .map_err(InetError::Tls)?; | ||
| reporter.report(Event::tls_finish())?; | ||
| Either::Right(conn) | ||
| } else { | ||
| Either::Left(conn) | ||
| }; | ||
| Ok(Framed::new(conn, self.codec())) | ||
| } | ||
|
|
||
| fn codec(&self) -> ConfabCodec { | ||
| ConfabCodec::new_with_max_length(self.max_line_length.get()) | ||
| .encoding(self.encoding) | ||
| .crlf(self.crlf) | ||
| } | ||
| } | ||
|
|
||
| async fn ioloop<S>(frame: &mut Connection, input: S, reporter: &mut Reporter) -> Result<(), IoError> | ||
| where | ||
| S: Stream<Item = Result<Input, InterfaceError>> + Send, | ||
| { | ||
| tokio::pin!(input); | ||
| loop { | ||
| tokio::select! { | ||
| r = frame.next() => match r { | ||
| Some(Ok(msg)) => reporter.report(Event::recv(msg))?, | ||
| Some(Err(e)) => return Err(IoError::Inet(InetError::Recv(e))), | ||
| None => break, | ||
| }, | ||
| r = input.next() => match r { | ||
| Some(Ok(Input::Line(line))) => { | ||
| let line = frame.codec().prepare_line(line); | ||
| frame.send(&line).await.map_err(InetError::Send)?; | ||
| reporter.report(Event::send(line))?; | ||
| } | ||
| Some(Ok(Input::CtrlC)) => reporter.echo_ctrlc()?, | ||
| Some(Err(e)) => return Err(e.into()), | ||
| None => break, | ||
| } | ||
| } | ||
| } | ||
| Ok(()) | ||
| } | ||
|
|
||
| fn init_readline() -> Result<(Readline, SharedWriter), InterfaceError> { | ||
| let (mut rl, shared) = Readline::new(String::from("confab> ")).map_err(InterfaceError::Init)?; | ||
| rl.should_print_line_on(false, false); | ||
| Ok((rl, shared)) | ||
| } |