Reconnect before input after local sleep

Cargo.lock

@@ -436,7 +436,7 @@ dependencies = [
 
 [[package]]
 name = "dosh"
-version = "1.0.0-rc33"
+version = "1.0.0-rc35"
 dependencies = [
  "anyhow",
  "base64",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "dosh"
-version = "1.0.0-rc33"
+version = "1.0.0-rc35"
 edition = "2024"
 license = "MIT"
 

README.md

@@ -85,12 +85,13 @@ dosh trace --client-log /tmp/dosh-client.log HOST
 Summarize collected traces with:
 
 ```sh
-dosh trace report --client-log /tmp/dosh-client.log
+dosh trace report HOST --client-log /tmp/dosh-client.log
 ```
 
-Set `DOSH_TRACE=/tmp/dosh-server.log` on `dosh-server` for matching server
-events. Trace byte prefixes are enabled for `dosh trace`, so use it only for
-short reproductions.
+When `HOST` is given, Dosh fetches `/tmp/dosh-server.log` over SSH before
+building the report. Set `DOSH_TRACE=/tmp/dosh-server.log` on `dosh-server` for
+matching server events. Trace byte prefixes are enabled for `dosh trace`, so use
+it only for short reproductions.
 
 ## VS Code
 

src/bin/dosh-client.rs

@@ -71,7 +71,7 @@ const MAX_PENDING_USER_INPUT_BYTES: usize = 1024 * 1024;
 const STARTUP_INPUT_HOLD: Duration = Duration::from_millis(750);
 const POST_SUBMIT_ALL_INPUT_HOLD: Duration = Duration::from_millis(120);
 const STALE_TERMINAL_INPUT_AFTER: Duration = Duration::from_secs(2);
-const POST_RECONNECT_STALE_INPUT_GRACE: Duration = Duration::from_secs(2);
+const POST_RECONNECT_STALE_INPUT_GRACE: Duration = Duration::from_secs(5);
 const FOCUS_REPAINT_COOLDOWN: Duration = Duration::from_secs(1);
 const ALT_SCREEN_IDLE_REPAINT_AFTER: Duration = Duration::from_secs(15);
 const LOCAL_SLEEP_REPAINT_AFTER: Duration = Duration::from_secs(5);
@@ -792,8 +792,9 @@ struct TraceOptions {
 
 #[derive(Debug, Clone, PartialEq, Eq)]
 struct TraceReportOptions {
+    host: Option<String>,
     client_log: Option<PathBuf>,
-    server_log: Option<PathBuf>,
+    server_log: Option<String>,
     tail: usize,
 }
 
@@ -888,15 +889,16 @@ fn parse_trace_options(command: &[String]) -> Result<TraceOptions> {
 }
 
 fn parse_trace_report_options(command: &[String]) -> Result<TraceReportOptions> {
+    let mut host: Option<String> = None;
     let mut client_log: Option<PathBuf> = None;
-    let mut server_log: Option<PathBuf> = Some(PathBuf::from("/tmp/dosh-server.log"));
+    let mut server_log: Option<String> = Some("/tmp/dosh-server.log".to_string());
     let mut tail = 20usize;
     let mut index = 0usize;
     while index < command.len() {
         match command[index].as_str() {
             "--client-log" => {
                 let path = command.get(index + 1).ok_or_else(|| {
-                    anyhow!("usage: dosh trace report [--client-log PATH] [--server-log PATH|none] [--tail N]")
+                    anyhow!("usage: dosh trace report [HOST] [--client-log PATH] [--server-log PATH|none] [--tail N]")
                 })?;
                 client_log = Some(expand_tilde(path));
                 index += 2;
@@ -911,7 +913,7 @@ fn parse_trace_report_options(command: &[String]) -> Result<TraceReportOptions>
             }
             "--server-log" => {
                 let path = command.get(index + 1).ok_or_else(|| {
-                    anyhow!("usage: dosh trace report [--client-log PATH] [--server-log PATH|none] [--tail N]")
+                    anyhow!("usage: dosh trace report [HOST] [--client-log PATH] [--server-log PATH|none] [--tail N]")
                 })?;
                 server_log = parse_optional_trace_path(path);
                 index += 2;
@@ -929,7 +931,7 @@ fn parse_trace_report_options(command: &[String]) -> Result<TraceReportOptions>
             }
             "--tail" => {
                 let value = command.get(index + 1).ok_or_else(|| {
-                    anyhow!("usage: dosh trace report [--client-log PATH] [--server-log PATH|none] [--tail N]")
+                    anyhow!("usage: dosh trace report [HOST] [--client-log PATH] [--server-log PATH|none] [--tail N]")
                 })?;
                 tail = parse_trace_tail(value)?;
                 index += 2;
@@ -941,25 +943,35 @@ fn parse_trace_report_options(command: &[String]) -> Result<TraceReportOptions>
                 tail = parse_trace_tail(value)?;
                 index += 1;
             }
-            value => {
+            value if value.starts_with('-') => {
                 return Err(anyhow!(
-                    "usage: dosh trace report [--client-log PATH] [--server-log PATH|none] [--tail N] (unknown option {value})"
+                    "usage: dosh trace report [HOST] [--client-log PATH] [--server-log PATH|none] [--tail N] (unknown option {value})"
                 ));
             }
+            value => {
+                if host.is_some() {
+                    return Err(anyhow!(
+                        "usage: dosh trace report [host] [--client-log PATH] [--server-log PATH|none] [--tail N]"
+                    ));
+                }
+                host = Some(value.to_string());
+                index += 1;
+            }
         }
     }
     Ok(TraceReportOptions {
+        host,
         client_log,
         server_log,
         tail,
     })
 }
 
-fn parse_optional_trace_path(value: &str) -> Option<PathBuf> {
+fn parse_optional_trace_path(value: &str) -> Option<String> {
     if matches!(value, "" | "none" | "off" | "0") {
         None
     } else {
-        Some(expand_tilde(value))
+        Some(value.to_string())
     }
 }
 
@@ -1006,7 +1018,8 @@ fn sanitize_trace_name(value: &str) -> String {
 
 fn run_trace_command(args: &Args) -> Result<()> {
     if args.command.first().is_some_and(|value| value == "report") {
-        return run_trace_report_command(&args.command[1..]);
+        let config = load_client_config(None).unwrap_or_default();
+        return run_trace_report_command(&config, args, &args.command[1..]);
     }
     let options = parse_trace_options(&args.command)?;
     if let Some(parent) = options.client_log.parent() {
@@ -1042,7 +1055,11 @@ fn run_trace_command(args: &Args) -> Result<()> {
     Ok(())
 }
 
-fn run_trace_report_command(command: &[String]) -> Result<()> {
+fn run_trace_report_command(
+    config: &dosh::config::ClientConfig,
+    args: &Args,
+    command: &[String],
+) -> Result<()> {
     let options = parse_trace_report_options(command)?;
     let client_log = match options.client_log {
         Some(path) => Some(path),
@@ -1061,6 +1078,20 @@ fn run_trace_report_command(command: &[String]) -> Result<()> {
         );
     }
     if let Some(path) = options.server_log {
+        let server_log = if let Some(host) = options.host.as_deref() {
+            match fetch_trace_server_log(config, args, host, &path) {
+                Ok(path) => Some(path),
+                Err(err) => {
+                    println!("[warn] server log {host}:{path}: {err:#}");
+                    None
+                }
+            }
+        } else {
+            Some(expand_tilde(&path))
+        };
+        let Some(path) = server_log else {
+            return Ok(());
+        };
         match summarize_trace_file(&path, options.tail) {
             Ok(report) => print_trace_report("server", &report),
             Err(err)
@@ -1076,6 +1107,66 @@ fn run_trace_report_command(command: &[String]) -> Result<()> {
     Ok(())
 }
 
+fn fetch_trace_server_log(
+    config: &dosh::config::ClientConfig,
+    args: &Args,
+    requested: &str,
+    remote_log: &str,
+) -> Result<PathBuf> {
+    let hosts = load_hosts_config(None).unwrap_or_default();
+    let host_config = hosts.hosts.get(requested).cloned().unwrap_or_default();
+    let server = status_ssh_target(requested, &host_config);
+    let ssh_port = args.ssh_port.or(host_config.ssh_port).or(config.ssh_port);
+    if is_local_status_target(&server) {
+        return Ok(expand_tilde(remote_log));
+    }
+    let local_path = fetched_trace_server_log_path(requested);
+    if let Some(parent) = local_path.parent() {
+        fs::create_dir_all(parent)
+            .with_context(|| format!("create trace log directory {}", parent.to_string_lossy()))?;
+    }
+    let mut command = Command::new("ssh");
+    if let Some(ssh_port) = ssh_port {
+        command.arg("-p").arg(ssh_port.to_string());
+    }
+    command.arg("-T");
+    if let Some(key) = args.ssh_key.as_deref() {
+        command.arg("-i").arg(key);
+    }
+    if let Some(known_hosts) = args.ssh_known_hosts.as_deref() {
+        command
+            .arg("-o")
+            .arg(format!("UserKnownHostsFile={}", known_hosts.display()));
+    }
+    let script = format!("test -r {0} && cat {0}", shell_word(remote_log));
+    let output = command
+        .arg(&server)
+        .arg(format!("sh -c {}", shell_word(&script)))
+        .output()
+        .with_context(|| format!("fetch server trace log from {server}"))?;
+    anyhow::ensure!(
+        output.status.success(),
+        "{}",
+        String::from_utf8_lossy(&output.stderr)
+    );
+    fs::write(&local_path, &output.stdout)
+        .with_context(|| format!("write fetched server trace {}", local_path.display()))?;
+    Ok(local_path)
+}
+
+fn fetched_trace_server_log_path(host: &str) -> PathBuf {
+    let now = SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .map(|duration| duration.as_secs())
+        .unwrap_or(0);
+    trace_cache_dir().join(format!(
+        "server-{}-{}-{}.log",
+        sanitize_trace_name(host),
+        now,
+        std::process::id()
+    ))
+}
+
 fn trace_cache_dir() -> PathBuf {
     dirs::cache_dir()
         .unwrap_or_else(|| expand_tilde("~/.cache"))
@@ -5575,8 +5666,62 @@ async fn run_terminal(
                             dosh::trace::event("client.escape", &[]);
                             break;
                         }
+                        let input_status_tick_gap = last_status_tick_at.elapsed();
+                        let mut refreshed_before_input = false;
+                        if should_reconnect_before_input_for_local_sleep(
+                            forward_only,
+                            input_status_tick_gap,
+                        ) {
+                            dosh::trace::event(
+                                "client.local_sleep_input_reconnect_start",
+                                &[(
+                                    "tick_gap_ms",
+                                    input_status_tick_gap.as_millis().to_string(),
+                                )],
+                            );
+                            last_status_tick_at = Instant::now();
+                            arm_stale_terminal_input_suppression(
+                                &mut stale_terminal_input_suppress_until,
+                            );
+                            if let Some(frame) = reconnect(
+                                &socket,
+                                &mut cred,
+                                &mut send_seq,
+                                last_size,
+                                &mut frame_buffer,
+                                &mut predictor,
+                            )
+                            .await?
+                            {
+                                dosh::trace::event(
+                                    "client.local_sleep_input_reconnect_ok",
+                                    &[
+                                        ("output_seq", frame.output_seq.to_string()),
+                                        ("bytes", frame.bytes.len().to_string()),
+                                    ],
+                                );
+                                refresh_live_addr(&mut addr, &cred)?;
+                                render_frame(&frame)?;
+                                predictor.observe_output(&frame.bytes);
+                                last_terminal_frame_at = Instant::now();
+                                last_packet_at = Instant::now();
+                                last_focus_repaint_at = Instant::now();
+                                refreshed_before_input = true;
+                                flush_pending_user_input(
+                                    &socket,
+                                    addr,
+                                    &cred,
+                                    &mut send_seq,
+                                    &mut predictor,
+                                    &mut pending_user_input,
+                                    &mut pending_user_input_bytes,
+                                )
+                                .await?;
+                            }
+                        }
                         let saw_focus_in = input_contains_focus_in(&bytes);
                         if !forward_only
+                            && !refreshed_before_input
                             && saw_focus_in
                             && last_focus_repaint_at.elapsed() >= FOCUS_REPAINT_COOLDOWN
                         {
@@ -6996,6 +7141,13 @@ fn should_strip_stale_terminal_reports(
         || suppress_until.is_some_and(|deadline| Instant::now() < deadline)
 }
 
+fn should_reconnect_before_input_for_local_sleep(
+    forward_only: bool,
+    status_tick_gap: Duration,
+) -> bool {
+    !forward_only && status_tick_gap >= LOCAL_SLEEP_REPAINT_AFTER
+}
+
 fn should_strip_unowned_terminal_reports(alternate_screen: bool, mouse_tracking: bool) -> bool {
     !alternate_screen && !mouse_tracking
 }
@@ -7053,6 +7205,13 @@ fn should_repaint_idle_terminal(
 
 fn arm_stale_terminal_input_suppression(suppress_until: &mut Option<Instant>) {
     *suppress_until = Some(Instant::now() + POST_RECONNECT_STALE_INPUT_GRACE);
+    dosh::trace::event(
+        "client.stale_terminal_quarantine_arm",
+        &[(
+            "grace_ms",
+            POST_RECONNECT_STALE_INPUT_GRACE.as_millis().to_string(),
+        )],
+    );
 }
 
 async fn flush_pending_user_input(
@@ -8992,24 +9151,25 @@ mod tests {
     use super::{
         ALT_SCREEN_IDLE_REPAINT_AFTER, CachedCredential, DisconnectStatus, DynamicForward,
         FRAME_GAP_RESYNC_AFTER_MS, FrameBuffer, LOCAL_SLEEP_REPAINT_AFTER, LocalForward,
-        MAX_PENDING_USER_INPUT_BYTES, NativeIdentityContext, POST_SUBMIT_ALL_INPUT_HOLD,
-        PendingStreamOpen, PredictMode, Predictor, RESTART_STATUS_SCRIPT, RemoteForward,
-        STARTUP_INPUT_HOLD, SshConfig, SshPathTokenContext, StartupGateMode, StatusAction,
-        UpdateOptions, UpdateRole, auth_allows, cache_key, cache_server_prefix,
-        cleanup_stream_state, clear_cached_credentials, ensure_tui_safe_status_overlay,
-        expand_ssh_path_tokens, input_contains_focus_in, input_matches_escape,
-        is_local_status_target, is_resume_response_for_client, latest_release_download_url,
-        load_first_native_identity_with_prompt, native_proxy_udp_warning, parse_dynamic_forward,
-        parse_escape_key, parse_local_forward, parse_remote_forward, parse_ssh_config,
-        parse_trace_line, parse_trace_options, parse_trace_report_options, parse_trace_summary,
-        parse_update_options, post_submit_hold_duration, queue_pending_user_input,
-        queue_stale_pending_user_input, raw_contains_host_table, recv_response_until,
-        refresh_live_addr, release_tag_download_url, release_tag_from_effective_url,
-        release_version_from_tag, render_status_clear, render_status_overlay, requested_env,
-        resolved_startup_command, retire_stream_state, retransmit_stream_opens,
-        rewrite_forward_command, sanitize_trace_name, selected_predict_mode, selected_udp_host,
-        server_version_mismatch, should_flush_terminal_input_after_contact,
-        should_hold_during_startup_gate, should_hold_post_submit_input,
+        MAX_PENDING_USER_INPUT_BYTES, NativeIdentityContext, POST_RECONNECT_STALE_INPUT_GRACE,
+        POST_SUBMIT_ALL_INPUT_HOLD, PendingStreamOpen, PredictMode, Predictor,
+        RESTART_STATUS_SCRIPT, RemoteForward, STARTUP_INPUT_HOLD, SshConfig, SshPathTokenContext,
+        StartupGateMode, StatusAction, UpdateOptions, UpdateRole, auth_allows, cache_key,
+        cache_server_prefix, cleanup_stream_state, clear_cached_credentials,
+        ensure_tui_safe_status_overlay, expand_ssh_path_tokens, input_contains_focus_in,
+        input_matches_escape, is_local_status_target, is_resume_response_for_client,
+        latest_release_download_url, load_first_native_identity_with_prompt,
+        native_proxy_udp_warning, parse_dynamic_forward, parse_escape_key, parse_local_forward,
+        parse_remote_forward, parse_ssh_config, parse_trace_line, parse_trace_options,
+        parse_trace_report_options, parse_trace_summary, parse_update_options,
+        post_submit_hold_duration, queue_pending_user_input, queue_stale_pending_user_input,
+        raw_contains_host_table, recv_response_until, refresh_live_addr, release_tag_download_url,
+        release_tag_from_effective_url, release_version_from_tag, render_status_clear,
+        render_status_overlay, requested_env, resolved_startup_command, retire_stream_state,
+        retransmit_stream_opens, rewrite_forward_command, sanitize_trace_name,
+        selected_predict_mode, selected_udp_host, server_version_mismatch,
+        should_flush_terminal_input_after_contact, should_hold_during_startup_gate,
+        should_hold_post_submit_input, should_reconnect_before_input_for_local_sleep,
         should_repaint_idle_terminal, should_strip_unowned_terminal_reports,
         split_after_command_submit, split_trace_tokens, ssh_command_target, ssh_config_uses_proxy,
         ssh_destination_host, ssh_username, ssh_with_user, startup_command, status_ssh_target,
@@ -10324,27 +10484,30 @@ mod tests {
     #[test]
     fn trace_report_options_parse_defaults_and_overrides() {
         let parsed = parse_trace_report_options(&[]).unwrap();
+        assert_eq!(parsed.host, None);
         assert_eq!(parsed.client_log, None);
-        assert_eq!(
-            parsed.server_log,
-            Some(std::path::PathBuf::from("/tmp/dosh-server.log"))
-        );
+        assert_eq!(parsed.server_log, Some("/tmp/dosh-server.log".to_string()));
         assert_eq!(parsed.tail, 20);
 
         let parsed = parse_trace_report_options(&[
+            "palav".to_string(),
             "--client-log=/tmp/client.log".to_string(),
             "--server-log".to_string(),
-            "none".to_string(),
+            "/tmp/server.log".to_string(),
             "--tail".to_string(),
             "3".to_string(),
         ])
         .unwrap();
+        assert_eq!(parsed.host.as_deref(), Some("palav"));
         assert_eq!(
             parsed.client_log,
             Some(std::path::PathBuf::from("/tmp/client.log"))
         );
-        assert_eq!(parsed.server_log, None);
+        assert_eq!(parsed.server_log.as_deref(), Some("/tmp/server.log"));
         assert_eq!(parsed.tail, 3);
+
+        let parsed = parse_trace_report_options(&["--server-log=none".to_string()]).unwrap();
+        assert_eq!(parsed.server_log, None);
     }
 
     #[test]
@@ -11040,6 +11203,35 @@ mod tests {
         ));
     }
 
+    #[test]
+    fn local_sleep_gap_reconnects_before_forwarding_input() {
+        assert!(should_reconnect_before_input_for_local_sleep(
+            false,
+            LOCAL_SLEEP_REPAINT_AFTER
+        ));
+        assert!(should_reconnect_before_input_for_local_sleep(
+            false,
+            LOCAL_SLEEP_REPAINT_AFTER + Duration::from_secs(10)
+        ));
+        assert!(!should_reconnect_before_input_for_local_sleep(
+            false,
+            LOCAL_SLEEP_REPAINT_AFTER - Duration::from_millis(1)
+        ));
+        assert!(!should_reconnect_before_input_for_local_sleep(
+            true,
+            LOCAL_SLEEP_REPAINT_AFTER + Duration::from_secs(10)
+        ));
+    }
+
+    #[test]
+    fn reconnect_mouse_quarantine_is_long_enough_for_sleep_wake_noise() {
+        assert!(POST_RECONNECT_STALE_INPUT_GRACE >= LOCAL_SLEEP_REPAINT_AFTER);
+        assert_eq!(
+            strip_stale_mouse_reports(b"35;152;1M\x1b[A35;149;1M"),
+            b"\x1b[A"
+        );
+    }
+
     #[test]
     fn non_mouse_escape_input_survives_stale_filter() {
         assert_eq!(strip_stale_mouse_reports(b"\x1b[A"), b"\x1b[A");