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feat(rdp): printer redirection, saved as PostScript

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An optional 'Nexus Terminal' printer (IronRDP's PostScript driver
announce) appears on the remote desktop; each job is written to
'Nexus print <time>.ps' in Downloads, with a toast saying where. Jobs
are capped at 256 MiB and empty jobs leave no file. The shared drive and
the printer now share one RDPDR backend (rdp_devices); the printer
works on every platform, the drive on Linux and macOS.

Tested with a unit test driving create/write/close; xrdp has no printer
redirection, so not exercised against a server.
This commit is contained in:
Andy Dixon
2026-10-12 18:14:31 +01:00
parent b798422735
commit 2fa56e0723
11 changed files with 354 additions and 139 deletions
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rust/core/src/clients/rdp.rs
+22 -4
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@@ -52,6 +52,8 @@ pub struct Config {
pub audio: bool,
/// A local folder to share as a drive (Unix only), and the name it appears under.
pub shared_folder: Option<(std::path::PathBuf, String)>,
/// Offer a printer; jobs are saved as PostScript in this folder.
pub printer: Option<(std::path::PathBuf, super::rdp_devices::PrintedFn)>,
pub dial: Dial,
pub check_cert: CertCheck,
pub connect_timeout: Duration,
@@ -196,10 +198,25 @@ impl Client {
if self.cfg.audio {
connector.attach_static_channel(ironrdp::rdpsnd::client::Rdpsnd::new(Box::new(ironrdp_rdpsnd_native::cpal::RdpsndBackend::new())));
}
#[cfg(unix)]
if let Some((folder, name)) = &self.cfg.shared_folder {
let drive = super::rdp_drive::ConfinedDrive::new(folder).map_err(|e| format!("shared folder {}: {e}", folder.display()))?;
connector.attach_static_channel(ironrdp::rdpdr::Rdpdr::new(Box::new(drive), "Nexus".into()).with_drives(Some(vec![(1, name.clone())])));
if self.cfg.shared_folder.is_some() || self.cfg.printer.is_some() {
let mut devices = super::rdp_devices::Devices::default();
let mut drives = vec![];
#[cfg(unix)]
if let Some((folder, name)) = &self.cfg.shared_folder {
devices = devices.with_drive(folder).map_err(|e| format!("shared folder {}: {e}", folder.display()))?;
drives.push((1, name.clone()));
}
if let Some((dir, on_printed)) = &self.cfg.printer {
devices = devices.with_printer(dir.clone(), on_printed.clone());
}
let mut rdpdr = ironrdp::rdpdr::Rdpdr::new(Box::new(devices), "Nexus".into());
if !drives.is_empty() {
rdpdr = rdpdr.with_drives(Some(drives));
}
if self.cfg.printer.is_some() {
rdpdr = rdpdr.with_printer(2, "Nexus Terminal".into());
}
connector.attach_static_channel(rdpdr);
}
let (clip_tx, clip_rx) = mpsc::channel();
connector.attach_static_channel(CliprdrClient::new(Box::new(TextClipboard {
@@ -584,6 +601,7 @@ mod tests {
allow_tls_only: true,
audio: std::env::var("NEXUS_RDP_AUDIO").is_ok(),
shared_folder: std::env::var("NEXUS_RDP_SHARE").ok().map(|p| (p.into(), "nexus".into())),
printer: std::env::var("NEXUS_RDP_PRINT").ok().map(|p| (p.into(), Arc::new(|f: std::path::PathBuf| eprintln!("printed {}", f.display())) as _)),
dial: Arc::new(move || Ok(TcpStream::connect((h2.as_str(), port))?)),
check_cert: Arc::new(move |fp| {
*sc.lock() = fp.to_string();