feat(desktop): improve torrent file integration

Cargo.lock

@@ -4641,6 +4641,7 @@ dependencies = [
  "base64 0.22.1",
  "directories 5.0.1",
  "gethostname 0.5.0",
+ "gtk",
  "http",
  "librqbit",
  "parking_lot",

crates/librqbit/webui/src/api-types.ts

@@ -23,9 +23,30 @@ export interface TorrentFileAttributes {
 export interface TorrentDetails {
   name: string | null;
   info_hash: string;
+  output_folder: string;
   files: Array<TorrentFile>;
 }
 
+export interface LocalTorrentFile {
+  kind: "local-file";
+  path: string;
+  name: string;
+}
+
+export type TorrentInput = string | File | LocalTorrentFile;
+
+export function localTorrentFile(path: string): LocalTorrentFile {
+  return {
+    kind: "local-file",
+    path,
+    name: path.split(/[\\/]/).pop() || path,
+  };
+}
+
+export function isLocalTorrentFile(data: TorrentInput): data is LocalTorrentFile {
+  return typeof data === "object" && !(data instanceof File) && data.kind === "local-file";
+}
+
 export interface AddTorrentResponse {
   id: number | null;
   details: TorrentDetails;
@@ -192,9 +213,10 @@ export interface RqbitAPI {
     filename?: string | null,
   ) => string | null;
   uploadTorrent: (
-    data: string | File,
+    data: TorrentInput,
     opts?: AddTorrentOptions,
   ) => Promise<AddTorrentResponse>;
+  openTorrentOutput?: (index: number) => Promise<void>;
 
   pause: (index: number) => Promise<void>;
   updateOnlyFiles: (index: number, files: number[]) => Promise<void>;

crates/librqbit/webui/src/components/TorrentRow.tsx

@@ -93,9 +93,82 @@ export const TorrentRow: React.FC<{
   };
 
   const [extendedView, setExtendedView] = useState(false);
+  const [contextMenu, setContextMenu] = useState<{
+    x: number;
+    y: number;
+  } | null>(null);
+
+  useEffect(() => {
+    if (!contextMenu) {
+      return;
+    }
+
+    const close = () => setContextMenu(null);
+    const closeOnEscape = (event: KeyboardEvent) => {
+      if (event.key === "Escape") {
+        setContextMenu(null);
+      }
+    };
+
+    window.addEventListener("click", close);
+    window.addEventListener("keydown", closeOnEscape);
+    return () => {
+      window.removeEventListener("click", close);
+      window.removeEventListener("keydown", closeOnEscape);
+    };
+  }, [contextMenu]);
+
+  const openOutput = () => {
+    if (!API.openTorrentOutput) {
+      return;
+    }
+
+    API.openTorrentOutput(id).catch((e) => {
+      setCloseableError({
+        text: `Error opening torrent output id=${id}`,
+        details: e as ErrorDetails,
+      });
+    });
+    setContextMenu(null);
+  };
+
+  const handleContextMenu = (event: React.MouseEvent) => {
+    if (!API.openTorrentOutput) {
+      return;
+    }
+
+    event.preventDefault();
+    setContextMenu({ x: event.clientX, y: event.clientY });
+  };
 
   return (
-    <div className="flex flex-col border p-2 border-gray-200 rounded-xl shadow-xs hover:drop-shadow-sm dark:bg-slate-800 dark:border-slate-900">
+    <div
+      className="flex flex-col border p-2 border-gray-200 rounded-xl shadow-xs hover:drop-shadow-sm dark:bg-slate-800 dark:border-slate-900"
+      onContextMenu={handleContextMenu}
+    >
+      {contextMenu && (
+        <div
+          className="fixed z-50 min-w-52 overflow-hidden rounded-md border border-gray-200 bg-white py-1 text-sm shadow-lg dark:border-slate-700 dark:bg-slate-800"
+          style={{ left: contextMenu.x, top: contextMenu.y }}
+          onClick={(event) => event.stopPropagation()}
+        >
+          <button
+            className="block w-full px-3 py-2 text-left text-gray-800 hover:bg-gray-100 dark:text-slate-100 dark:hover:bg-slate-700"
+            onClick={openOutput}
+          >
+            Open download folder
+          </button>
+          <button
+            className="block w-full px-3 py-2 text-left text-gray-800 hover:bg-gray-100 dark:text-slate-100 dark:hover:bg-slate-700"
+            onClick={() => {
+              setExtendedView(true);
+              setContextMenu(null);
+            }}
+          >
+            Show files
+          </button>
+        </div>
+      )}
       <section className="flex flex-col lg:flex-row items-center gap-2">
         {/* Icon */}
         <div className="hidden md:block">{statusIcon("w-10 h-10")}</div>

crates/librqbit/webui/src/components/buttons/TorrentActions.tsx

@@ -9,6 +9,7 @@ import {
   FaPlay,
   FaTrash,
   FaClipboardList,
+  FaFolderOpen,
 } from "react-icons/fa";
 import { useErrorStore } from "../../stores/errorStore";
 import { ErrorComponent } from "../ErrorComponent";
@@ -34,6 +35,22 @@ export const TorrentActions: React.FC<{
 
   const API = useContext(APIContext);
 
+  const openOutput = () => {
+    if (!API.openTorrentOutput) {
+      return;
+    }
+
+    setDisabled(true);
+    API.openTorrentOutput(id)
+      .catch((e) => {
+        setCloseableError({
+          text: `Error opening torrent output id=${id}`,
+          details: e,
+        });
+      })
+      .finally(() => setDisabled(false));
+  };
+
   const unpause = () => {
     setDisabled(true);
     API.start(id)
@@ -136,6 +153,11 @@ export const TorrentActions: React.FC<{
           <FaCog className="hover:text-green-600" />
         </IconButton>
       )}
+      {API.openTorrentOutput && (
+        <IconButton onClick={openOutput} disabled={disabled}>
+          <FaFolderOpen className="hover:text-blue-500" />
+        </IconButton>
+      )}
       <IconButton onClick={startDeleting} disabled={disabled}>
         <FaTrash className="hover:text-red-500" />
       </IconButton>

crates/librqbit/webui/src/components/buttons/UploadButton.tsx

@@ -2,6 +2,7 @@ import { ReactNode, useContext, useEffect, useState } from "react";
 import {
   AddTorrentResponse,
   ErrorDetails as ApiErrorDetails,
+  TorrentInput,
 } from "../../api-types";
 import { APIContext } from "../../context";
 import { ErrorWithLabel } from "../../rqbit-web";
@@ -10,7 +11,7 @@ import { Button } from "./Button";
 
 export const UploadButton: React.FC<{
   onClick: () => void;
-  data: string | File | null;
+  data: TorrentInput | null;
   resetData: () => void;
   children: ReactNode;
   className?: string;

crates/librqbit/webui/src/components/modal/FileSelectionModal.tsx

@@ -1,5 +1,9 @@
 import { useContext, useEffect, useState } from "react";
-import { AddTorrentResponse, AddTorrentOptions } from "../../api-types";
+import {
+  AddTorrentResponse,
+  AddTorrentOptions,
+  TorrentInput,
+} from "../../api-types";
 import { APIContext } from "../../context";
 import { ErrorComponent } from "../ErrorComponent";
 import { ErrorWithLabel } from "../../rqbit-web";
@@ -19,7 +23,7 @@ export const FileSelectionModal = (props: {
   listTorrentResponse: AddTorrentResponse | null;
   listTorrentError: ErrorWithLabel | null;
   listTorrentLoading: boolean;
-  data: string | File;
+  data: TorrentInput;
 }) => {
   let {
     onHide,

crates/librqbit/webui/src/http-api.ts

@@ -6,6 +6,7 @@ import {
   SessionStats,
   TorrentDetails,
   TorrentStats,
+  isLocalTorrentFile,
 } from "./api-types";
 
 // Define API URL and base path
@@ -99,6 +100,12 @@ export const API: RqbitAPI & { getVersion: () => Promise<string> } = {
   },
 
   uploadTorrent: (data, opts): Promise<AddTorrentResponse> => {
+    if (isLocalTorrentFile(data)) {
+      return Promise.reject({
+        text: "Local torrent file paths are only supported in rqbit desktop.",
+      });
+    }
+
     let url = "/torrents?&overwrite=true";
     if (opts?.list_only) {
       url += "&list_only=true";

desktop/src-tauri/Cargo.toml

@@ -33,6 +33,7 @@ serde_with = "3.4.0"
 parking_lot = "0.12.1"
 gethostname = "0.5.0"
 tauri-plugin-shell = "2"
+gtk = "0.18.2"
 
 [features]
 # this feature is used for production builds or when `devPath` points to the filesystem

desktop/src-tauri/src/main.rs

@@ -4,12 +4,17 @@
 mod config;
 
 use std::{
+    ffi::OsString,
     fs::{File, OpenOptions},
-    io::{BufReader, BufWriter},
+    io::{BufReader, BufWriter, Read, Write},
-    path::Path,
+    path::{Path, PathBuf},
+    process::Command,
     sync::Arc,
 };
 
+#[cfg(unix)]
+use std::os::unix::net::{UnixListener, UnixStream};
+
 use anyhow::Context;
 use config::RqbitDesktopConfig;
 use http::StatusCode;
@@ -24,8 +29,9 @@ use librqbit::{
     AddTorrent, AddTorrentOptions, Api, ApiError, PeerConnectionOptions, Session, SessionOptions,
     SessionPersistenceConfig,
 };
-use parking_lot::RwLock;
+use parking_lot::{Mutex, RwLock};
-use serde::Serialize;
+use serde::{Deserialize, Serialize};
+use tauri::{Emitter, Manager};
 use tracing::{error, error_span, info, warn};
 
 const ERR_NOT_CONFIGURED: ApiError =
@@ -39,9 +45,302 @@ struct StateShared {
 struct State {
     config_filename: String,
     shared: Arc<RwLock<Option<StateShared>>>,
+    pending_torrent_inputs: Mutex<Vec<PendingTorrentInput>>,
     init_logging: InitLoggingResult,
 }
 
+const TORRENT_INPUTS_EVENT: &str = "torrent-inputs";
+
+#[derive(Clone, Deserialize, Serialize)]
+#[serde(tag = "type", rename_all = "snake_case")]
+enum PendingTorrentInput {
+    FilePath { path: String },
+    Url { url: String },
+}
+
+#[derive(Deserialize, Serialize)]
+struct InstanceMessage {
+    inputs: Vec<PendingTorrentInput>,
+}
+
+fn pending_torrent_input_from_arg(arg: OsString) -> Option<PendingTorrentInput> {
+    let raw = arg.to_string_lossy();
+    let arg = raw.trim();
+    if arg.is_empty() {
+        return None;
+    }
+
+    let lower_arg = arg.to_ascii_lowercase();
+    if lower_arg.starts_with("magnet:")
+        || lower_arg.starts_with("http://")
+        || lower_arg.starts_with("https://")
+    {
+        return Some(PendingTorrentInput::Url {
+            url: arg.to_owned(),
+        });
+    }
+
+    let path = if let Some(path) = arg.strip_prefix("file://") {
+        file_uri_to_path(path)?
+    } else {
+        PathBuf::from(arg)
+    };
+
+    if path
+        .extension()
+        .and_then(|ext| ext.to_str())
+        .is_some_and(|ext| ext.eq_ignore_ascii_case("torrent"))
+    {
+        return Some(PendingTorrentInput::FilePath {
+            path: path.to_string_lossy().into_owned(),
+        });
+    }
+
+    None
+}
+
+fn file_uri_to_path(uri_path: &str) -> Option<PathBuf> {
+    let path = if let Some(path) = uri_path.strip_prefix("localhost/") {
+        format!("/{path}")
+    } else {
+        uri_path.to_owned()
+    };
+    percent_decode(&path).map(PathBuf::from)
+}
+
+fn percent_decode(value: &str) -> Option<String> {
+    fn hex_value(value: u8) -> Option<u8> {
+        match value {
+            b'0'..=b'9' => Some(value - b'0'),
+            b'a'..=b'f' => Some(value - b'a' + 10),
+            b'A'..=b'F' => Some(value - b'A' + 10),
+            _ => None,
+        }
+    }
+
+    let bytes = value.as_bytes();
+    let mut decoded = Vec::with_capacity(bytes.len());
+    let mut idx = 0;
+
+    while idx < bytes.len() {
+        if bytes[idx] == b'%' {
+            let high = *bytes.get(idx + 1)?;
+            let low = *bytes.get(idx + 2)?;
+            decoded.push(hex_value(high)? << 4 | hex_value(low)?);
+            idx += 3;
+        } else {
+            decoded.push(bytes[idx]);
+            idx += 1;
+        }
+    }
+
+    String::from_utf8(decoded).ok()
+}
+
+fn pending_torrent_inputs_from_args() -> Vec<PendingTorrentInput> {
+    std::env::args_os()
+        .skip(1)
+        .filter_map(pending_torrent_input_from_arg)
+        .collect()
+}
+
+#[cfg(unix)]
+enum SingleInstance {
+    Primary(UnixListener),
+    Secondary,
+    Disabled,
+}
+
+#[cfg(unix)]
+fn acquire_single_instance(inputs: &[PendingTorrentInput]) -> SingleInstance {
+    let socket_path = single_instance_socket_path();
+
+    if send_instance_message(&socket_path, inputs).is_ok() {
+        return SingleInstance::Secondary;
+    }
+
+    match bind_single_instance_socket(&socket_path) {
+        Ok(listener) => SingleInstance::Primary(listener),
+        Err(e) => {
+            warn!(error = ?e, path = ?socket_path, "single instance socket disabled");
+            SingleInstance::Disabled
+        }
+    }
+}
+
+#[cfg(unix)]
+fn single_instance_socket_path() -> PathBuf {
+    if let Some(runtime_dir) = std::env::var_os("XDG_RUNTIME_DIR") {
+        return PathBuf::from(runtime_dir).join("rqbit-desktop.sock");
+    }
+
+    let user = std::env::var("USER").unwrap_or_else(|_| "unknown".to_owned());
+    std::env::temp_dir().join(format!("rqbit-desktop-{user}.sock"))
+}
+
+#[cfg(unix)]
+fn send_instance_message(path: &Path, inputs: &[PendingTorrentInput]) -> anyhow::Result<()> {
+    let mut stream = UnixStream::connect(path)?;
+    serde_json::to_writer(
+        &mut stream,
+        &InstanceMessage {
+            inputs: inputs.to_vec(),
+        },
+    )?;
+    stream.write_all(b"\n")?;
+    Ok(())
+}
+
+#[cfg(unix)]
+fn bind_single_instance_socket(path: &Path) -> anyhow::Result<UnixListener> {
+    if let Some(parent) = path.parent() {
+        std::fs::create_dir_all(parent)
+            .with_context(|| format!("error creating socket directory {parent:?}"))?;
+    }
+
+    match UnixListener::bind(path) {
+        Ok(listener) => Ok(listener),
+        Err(e) if path.exists() => {
+            std::fs::remove_file(path)
+                .with_context(|| format!("error removing stale socket {path:?}"))?;
+            UnixListener::bind(path)
+                .with_context(|| format!("error binding single instance socket {path:?}"))
+        }
+        Err(e) => Err(e).with_context(|| format!("error binding single instance socket {path:?}")),
+    }
+}
+
+#[cfg(unix)]
+fn start_single_instance_listener(listener: UnixListener, app: tauri::AppHandle) {
+    std::thread::spawn(move || {
+        for stream in listener.incoming() {
+            match stream {
+                Ok(stream) => {
+                    let app = app.clone();
+                    std::thread::spawn(move || handle_single_instance_stream(stream, app));
+                }
+                Err(e) => warn!("error accepting single instance connection: {:#}", e),
+            }
+        }
+    });
+}
+
+#[cfg(unix)]
+fn handle_single_instance_stream(mut stream: UnixStream, app: tauri::AppHandle) {
+    let mut body = String::new();
+    if let Err(e) = stream.read_to_string(&mut body) {
+        warn!("error reading single instance message: {:#}", e);
+        return;
+    }
+
+    let message: InstanceMessage = match serde_json::from_str(&body) {
+        Ok(message) => message,
+        Err(e) => {
+            warn!("error parsing single instance message: {:#}", e);
+            return;
+        }
+    };
+
+    bring_main_window_to_front(&app);
+
+    if message.inputs.is_empty() {
+        return;
+    }
+
+    let state = app.state::<State>();
+    state.pending_torrent_inputs.lock().extend(message.inputs);
+
+    if let Err(e) = app.emit(TORRENT_INPUTS_EVENT, ()) {
+        warn!("error emitting torrent inputs event: {:#}", e);
+    }
+}
+
+fn bring_main_window_to_front(app: &tauri::AppHandle) {
+    if let Some(window) = app.get_webview_window("main") {
+        let _ = window.unminimize();
+        let _ = window.show();
+        let _ = window.set_focus();
+    }
+}
+
+#[cfg(target_os = "linux")]
+fn apply_gtk_window_controls_layout(app: &tauri::App) {
+    use gtk::prelude::*;
+
+    let Some(window) = app.get_webview_window("main") else {
+        return;
+    };
+    let Ok(gtk_window) = window.gtk_window() else {
+        return;
+    };
+    let Some(titlebar) = gtk_window.titlebar() else {
+        return;
+    };
+    let Some(header) = find_gtk_header_bar(&titlebar) else {
+        warn!("could not find GTK header bar for window controls layout");
+        return;
+    };
+
+    apply_gtk_header_bar_layout(&header);
+
+    let header_for_resize = header.downgrade();
+    gtk_window.connect_resizable_notify(move |_| {
+        if let Some(header) = header_for_resize.upgrade() {
+            apply_gtk_header_bar_layout(&header);
+        }
+    });
+
+    if let Some(settings) = gtk::Settings::default() {
+        let header_for_settings = header.downgrade();
+        settings.connect_gtk_decoration_layout_notify(move |_| {
+            if let Some(header) = header_for_settings.upgrade() {
+                apply_gtk_header_bar_layout(&header);
+            }
+        });
+    }
+}
+
+#[cfg(target_os = "linux")]
+fn find_gtk_header_bar(widget: &gtk::Widget) -> Option<gtk::HeaderBar> {
+    use gtk::prelude::*;
+
+    if let Ok(header) = widget.clone().downcast::<gtk::HeaderBar>() {
+        return Some(header);
+    }
+
+    let Ok(container) = widget.clone().downcast::<gtk::Container>() else {
+        return None;
+    };
+
+    for child in container.children() {
+        if let Some(header) = find_gtk_header_bar(&child) {
+            return Some(header);
+        }
+    }
+
+    None
+}
+
+#[cfg(target_os = "linux")]
+fn apply_gtk_header_bar_layout(header: &gtk::HeaderBar) {
+    use gtk::prelude::*;
+
+    let layout = gtk_window_controls_layout();
+    header.set_decoration_layout(Some(&layout));
+    info!(%layout, "applied GTK window controls layout");
+}
+
+#[cfg(target_os = "linux")]
+fn gtk_window_controls_layout() -> String {
+    use gtk::prelude::*;
+
+    gtk::Settings::default()
+        .and_then(|settings| settings.gtk_decoration_layout())
+        .map(|layout| layout.to_string())
+        .filter(|layout| !layout.trim().is_empty())
+        .unwrap_or_else(|| "menu:minimize,maximize,close".to_string())
+}
+
 fn read_config(path: &str) -> anyhow::Result<RqbitDesktopConfig> {
     let rdr = BufReader::new(File::open(path)?);
     let mut config: RqbitDesktopConfig = serde_json::from_reader(rdr)?;
@@ -172,7 +471,11 @@ async fn api_from_config(
 }
 
 impl State {
-    async fn new(init_logging: InitLoggingResult) -> Self {
+    async fn new(
+        init_logging: InitLoggingResult,
+        pending_torrent_inputs: Vec<PendingTorrentInput>,
+    ) -> Self {
+        let pending_torrent_inputs = Mutex::new(pending_torrent_inputs);
         let config_filename = directories::ProjectDirs::from("com", "rqbit", "desktop")
             .expect("directories::ProjectDirs::from")
             .config_dir()
@@ -194,6 +497,7 @@ impl State {
             return Self {
                 config_filename,
                 shared,
+                pending_torrent_inputs,
                 init_logging,
             };
         }
@@ -202,6 +506,7 @@ impl State {
             config_filename,
             init_logging,
             shared: Arc::new(RwLock::new(None)),
+            pending_torrent_inputs,
         }
     }
 
@@ -309,6 +614,21 @@ async fn torrent_create_from_base64_file(
         .await
 }
 
+#[tauri::command]
+async fn torrent_create_from_file_path(
+    state: tauri::State<'_, State>,
+    path: String,
+    opts: Option<AddTorrentOptions>,
+) -> Result<ApiAddTorrentResponse, ApiError> {
+    let bytes = std::fs::read(&path)
+        .with_context(|| format!("error reading torrent file {path:?}"))
+        .map_err(|e| ApiError::new_from_anyhow(StatusCode::BAD_REQUEST, e))?;
+    state
+        .api()?
+        .api_add_torrent(AddTorrent::TorrentFileBytes(bytes.into()), opts)
+        .await
+}
+
 #[tauri::command]
 async fn torrent_details(
     state: tauri::State<'_, State>,
@@ -374,6 +694,70 @@ async fn stats(state: tauri::State<'_, State>) -> Result<SessionStatsSnapshot, A
     Ok(state.api()?.api_session_stats())
 }
 
+#[tauri::command]
+fn take_startup_torrent_inputs(state: tauri::State<'_, State>) -> Vec<PendingTorrentInput> {
+    let mut inputs = state.pending_torrent_inputs.lock();
+    std::mem::take(&mut *inputs)
+}
+
+#[tauri::command]
+async fn torrent_open_output(
+    state: tauri::State<'_, State>,
+    id: TorrentIdOrHash,
+) -> Result<EmptyJsonResponse, ApiError> {
+    let details = state.api()?.api_torrent_details(id)?;
+    let path = nearest_existing_path(PathBuf::from(details.output_folder));
+    open_file_manager(&path)
+        .map_err(|e| ApiError::new_from_anyhow(StatusCode::INTERNAL_SERVER_ERROR, e))?;
+    Ok(EmptyJsonResponse {})
+}
+
+fn nearest_existing_path(mut path: PathBuf) -> PathBuf {
+    let original = path.clone();
+    while !path.exists() {
+        if !path.pop() {
+            return original;
+        }
+    }
+    path
+}
+
+#[cfg(target_os = "linux")]
+fn open_file_manager(path: &Path) -> anyhow::Result<()> {
+    let mut command = Command::new("xdg-open");
+    command.arg(path);
+    spawn_open_command(command)
+}
+
+#[cfg(target_os = "macos")]
+fn open_file_manager(path: &Path) -> anyhow::Result<()> {
+    let mut command = Command::new("open");
+    command.arg(path);
+    spawn_open_command(command)
+}
+
+#[cfg(target_os = "windows")]
+fn open_file_manager(path: &Path) -> anyhow::Result<()> {
+    let mut command = Command::new("explorer");
+    command.arg(path);
+    spawn_open_command(command)
+}
+
+#[cfg(not(any(target_os = "linux", target_os = "macos", target_os = "windows")))]
+fn open_file_manager(_path: &Path) -> anyhow::Result<()> {
+    anyhow::bail!("opening downloaded files is not supported on this platform")
+}
+
+fn spawn_open_command(mut command: Command) -> anyhow::Result<()> {
+    let mut child = command.spawn().context("error opening path")?;
+    std::thread::spawn(move || {
+        if let Err(e) = child.wait() {
+            warn!("error waiting for opener process: {:#}", e);
+        }
+    });
+    Ok(())
+}
+
 #[tauri::command]
 fn get_version() -> &'static str {
     env!("CARGO_PKG_VERSION")
@@ -393,11 +777,30 @@ async fn start() {
         Err(e) => warn!("failed increasing open file limit: {:#}", e),
     };
 
-    let state = State::new(init_logging_result).await;
+    let pending_torrent_inputs = pending_torrent_inputs_from_args();
+
+    #[cfg(unix)]
+    let single_instance_listener = match acquire_single_instance(&pending_torrent_inputs) {
+        SingleInstance::Primary(listener) => Some(listener),
+        SingleInstance::Secondary => return,
+        SingleInstance::Disabled => None,
+    };
+
+    let state = State::new(init_logging_result, pending_torrent_inputs).await;
 
     tauri::Builder::default()
         .plugin(tauri_plugin_shell::init())
         .manage(state)
+        .setup(move |app| {
+            #[cfg(target_os = "linux")]
+            apply_gtk_window_controls_layout(app);
+
+            #[cfg(unix)]
+            if let Some(listener) = single_instance_listener {
+                start_single_instance_listener(listener, app.handle().clone());
+            }
+            Ok(())
+        })
         .invoke_handler(tauri::generate_handler![
             torrents_list,
             torrent_details,
@@ -409,6 +812,9 @@ async fn start() {
             torrent_action_start,
             torrent_action_configure,
             torrent_create_from_base64_file,
+            torrent_create_from_file_path,
+            take_startup_torrent_inputs,
+            torrent_open_output,
             stats,
             get_version,
             config_default,

desktop/src/StartupTorrentInputs.tsx

@@ -0,0 +1,144 @@
+import { useContext, useEffect, useState } from "react";
+import { invoke } from "@tauri-apps/api/core";
+import { listen } from "@tauri-apps/api/event";
+import {
+  AddTorrentResponse,
+  ErrorDetails as ApiErrorDetails,
+  TorrentInput,
+  localTorrentFile,
+} from "rqbit-webui/src/api-types";
+import { APIContext } from "rqbit-webui/src/context";
+import { FileSelectionModal } from "rqbit-webui/src/components/modal/FileSelectionModal";
+import { ErrorWithLabel } from "rqbit-webui/src/rqbit-web";
+
+type PendingTorrentInput =
+  | { type: "file_path"; path: string }
+  | { type: "url"; url: string };
+
+const TORRENT_INPUTS_EVENT = "torrent-inputs";
+
+const toTorrentInput = (input: PendingTorrentInput): TorrentInput => {
+  if (input.type === "file_path") {
+    return localTorrentFile(input.path);
+  }
+  return input.url;
+};
+
+export const StartupTorrentInputs = ({ enabled }: { enabled: boolean }) => {
+  const API = useContext(APIContext);
+  const [queue, setQueue] = useState<TorrentInput[]>([]);
+  const [activeInput, setActiveInput] = useState<TorrentInput | null>(null);
+  const [listTorrentResponse, setListTorrentResponse] =
+    useState<AddTorrentResponse | null>(null);
+  const [listTorrentError, setListTorrentError] =
+    useState<ErrorWithLabel | null>(null);
+  const [loading, setLoading] = useState(false);
+
+  useEffect(() => {
+    if (!enabled) {
+      return;
+    }
+
+    let unlisten: (() => void) | null = null;
+    let cancelled = false;
+
+    const drainPendingInputs = () => {
+      invoke<PendingTorrentInput[]>("take_startup_torrent_inputs").then(
+        (inputs) => {
+          if (!cancelled && inputs.length > 0) {
+            setQueue((queue) => [...queue, ...inputs.map(toTorrentInput)]);
+          }
+        },
+        (e) => {
+          console.error("error reading startup torrent inputs", e);
+        },
+      );
+    };
+
+    listen(TORRENT_INPUTS_EVENT, drainPendingInputs).then(
+      (cleanup) => {
+        if (cancelled) {
+          cleanup();
+          return;
+        }
+        unlisten = cleanup;
+        drainPendingInputs();
+      },
+      (e) => {
+        console.error("error listening for startup torrent inputs", e);
+        drainPendingInputs();
+      },
+    );
+
+    return () => {
+      cancelled = true;
+      unlisten?.();
+    };
+  }, [enabled]);
+
+  useEffect(() => {
+    if (!activeInput && queue.length > 0) {
+      const [next, ...remaining] = queue;
+      setActiveInput(next);
+      setQueue(remaining);
+    }
+  }, [activeInput, queue]);
+
+  useEffect(() => {
+    if (!activeInput) {
+      return;
+    }
+
+    let cancelled = false;
+    setLoading(true);
+    setListTorrentError(null);
+    setListTorrentResponse(null);
+
+    API.uploadTorrent(activeInput, { list_only: true })
+      .then(
+        (response) => {
+          if (!cancelled) {
+            setListTorrentResponse(response);
+          }
+        },
+        (e) => {
+          if (!cancelled) {
+            setListTorrentError({
+              text: "Error listing torrent files",
+              details: e as ApiErrorDetails,
+            });
+          }
+        },
+      )
+      .finally(() => {
+        if (!cancelled) {
+          setLoading(false);
+        }
+      });
+
+    return () => {
+      cancelled = true;
+    };
+  }, [API, activeInput]);
+
+  const clearActive = () => {
+    setActiveInput(null);
+    setListTorrentError(null);
+    setListTorrentResponse(null);
+    setLoading(false);
+  };
+
+  if (!activeInput) {
+    return null;
+  }
+
+  return (
+    <FileSelectionModal
+      onHide={clearActive}
+      listTorrentError={listTorrentError}
+      listTorrentResponse={listTorrentResponse}
+      data={activeInput}
+      listTorrentLoading={loading}
+    />
+  );
+};

desktop/src/api.tsx

@@ -7,6 +7,7 @@ import {
   TorrentStats,
   ErrorDetails,
   SessionStats,
+  isLocalTorrentFile,
 } from "rqbit-webui/src/api-types";
 
 import { InvokeArgs, invoke } from "@tauri-apps/api/core";
@@ -110,11 +111,23 @@ export const makeAPI = (configuration: RqbitDesktopConfig): RqbitAPI => {
           }
         );
       }
+      if (isLocalTorrentFile(data)) {
+        return await invokeAPI<AddTorrentResponse>(
+          "torrent_create_from_file_path",
+          {
+            path: data.path,
+            opts: opts ?? {},
+          }
+        );
+      }
       return await invokeAPI<AddTorrentResponse>("torrent_create_from_url", {
         url: data,
         opts: opts ?? {},
       });
     },
+    openTorrentOutput: function (id: number): Promise<void> {
+      return invokeAPI<void>("torrent_open_output", { id });
+    },
     updateOnlyFiles: function (id, files): Promise<void> {
       return invokeAPI<void>("torrent_action_configure", {
         id: id,

desktop/src/rqbit-desktop.tsx

@@ -1,4 +1,4 @@
-import { useState } from "react";
+import { useMemo, useState } from "react";
 import { RqbitWebUI } from "rqbit-webui/src/rqbit-web";
 import { CurrentDesktopState, RqbitDesktopConfig } from "./configuration";
 import { ConfigModal } from "./configure";
@@ -6,6 +6,7 @@ import { IconButton } from "rqbit-webui/src/components/buttons/IconButton";
 import { BsSliders2 } from "react-icons/bs";
 import { APIContext } from "rqbit-webui/src/context";
 import { makeAPI } from "./api";
+import { StartupTorrentInputs } from "./StartupTorrentInputs";
 
 export const RqbitDesktop: React.FC<{
   version: string;
@@ -17,6 +18,7 @@ export const RqbitDesktop: React.FC<{
     currentState.config ?? defaultConfig,
   );
   let [configurationOpened, setConfigurationOpened] = useState<boolean>(false);
+  const api = useMemo(() => makeAPI(config), [config]);
 
   const configButton = (
     <IconButton
@@ -29,13 +31,16 @@ export const RqbitDesktop: React.FC<{
   );
 
   return (
-    <APIContext.Provider value={makeAPI(config)}>
+    <APIContext.Provider value={api}>
       {configured && (
-        <RqbitWebUI
+        <>
-          title={`Rqbit Desktop`}
+          <RqbitWebUI
-          version={version}
+            title={`Rqbit Desktop`}
-          menuButtons={[configButton]}
+            version={version}
-        ></RqbitWebUI>
+            menuButtons={[configButton]}
+          ></RqbitWebUI>
+          <StartupTorrentInputs enabled={configured} />
+        </>
       )}
       <ConfigModal
         show={!configured || configurationOpened}