Fix background process lifecycle

backend/main.py

@@ -21,7 +21,7 @@ def main():
         os.makedirs(os.environ["WEBUI_UPLOAD_DIR"], exist_ok=True)
         os.makedirs(os.environ["WEBUI_CACHE_DIR"], exist_ok=True)
 
-    # Run the FastAPI app using uvicorn
+    # Run the FastAPI app - this will handle the command line args including "serve"
     app()
 
 

src-tauri/src/lib.rs

@@ -1,3 +1,5 @@
+use std::fs;
+use std::path::PathBuf;
 use std::sync::{Arc, Mutex};
 use tauri::Manager;
 use tauri_plugin_shell::{process::CommandEvent, ShellExt};
@@ -7,6 +9,29 @@ use tauri_plugin_shell::{process::CommandEvent, ShellExt};
 struct AppState {
     backend_port: Arc<Mutex<Option<u16>>>,
     backend_process: Arc<Mutex<Option<tauri_plugin_shell::process::CommandChild>>>,
+    backend_pid: Arc<Mutex<Option<u32>>>,
+}
+
+// Generate or load a persistent secret key for Open WebUI
+fn get_or_create_secret_key(config_dir: &PathBuf) -> Result<String, Box<dyn std::error::Error>> {
+    let secret_file = config_dir.join("webui_secret.txt");
+
+    // Try to read existing secret
+    if let Ok(secret) = fs::read_to_string(&secret_file) {
+        let secret = secret.trim();
+        if !secret.is_empty() {
+            return Ok(secret.to_string());
+        }
+    }
+
+    // Generate a new secure secret key
+    let secret = generate_secret_key();
+
+    // Save the secret for future use
+    fs::create_dir_all(config_dir)?;
+    fs::write(&secret_file, &secret)?;
+
+    Ok(secret)
 }
 
 // Generate a secure secret key for Open WebUI
@@ -51,8 +76,21 @@ async fn start_backend(app: tauri::AppHandle) -> Result<u16, String> {
         }
     }
 
-    // Find an available port
-    let port = find_available_port().map_err(|e| e.to_string())?;
+    // Kill any orphaned backend processes first
+    let _ = kill_orphaned_backends(); // Ignore errors, just try to clean up
+
+    // Find a persistent port (reuse existing or create new)
+    let app_config_dir = app
+        .path()
+        .app_config_dir()
+        .map_err(|e| format!("Failed to get app config directory: {}", e))?;
+
+    let port = get_or_create_persistent_port(&app_config_dir)
+        .map_err(|e| format!("Failed to get persistent port: {}", e))?;
+
+    // Get or create a persistent secret key
+    let secret_key = get_or_create_secret_key(&app_config_dir)
+        .map_err(|e| format!("Failed to get persistent secret key: {}", e))?;
 
     // Get the app data directory for persistence
     let app_data_dir = app
@@ -69,28 +107,54 @@ async fn start_backend(app: tauri::AppHandle) -> Result<u16, String> {
     std::fs::create_dir_all(&webui_data_dir)
         .map_err(|e| format!("Failed to create Open WebUI data directory: {}", e))?;
 
+    println!("Using persistent port: {}", port);
+    println!(
+        "Using secret key (first 8 chars): {}...",
+        &secret_key[..8.min(secret_key.len())]
+    );
+    println!(
+        "Open WebUI data directory: {}",
+        webui_data_dir.to_string_lossy()
+    );
+    println!("App config directory: {}", app_config_dir.to_string_lossy());
+
     // Start the backend sidecar with proper environment variables
     let sidecar_command = app
         .shell()
         .sidecar("glowpath-backend")
         .map_err(|e| format!("Failed to create sidecar command: {}", e))?
         .args(&["serve", "--host", "127.0.0.1", "--port", &port.to_string()])
-        .env("WEBUI_SECRET_KEY", &generate_secret_key()) // Generate a proper secret
+        .env("WEBUI_SECRET_KEY", &secret_key) // Use persistent secret key
         .env("DATA_DIR", &webui_data_dir)
         .env(
             "WEBUI_DATABASE_URL",
             format!("sqlite:///{}/webui.db", webui_data_dir.to_string_lossy()),
-        );
+        )
+        .env("WEBUI_AUTH", "false") // Disable authentication completely
+        .env("WEBUI_ENABLE_SIGNUP", "false") // Disable user signup
+        .env("WEBUI_ENABLE_LOGIN_FORM", "false") // Disable login form
+        .env("WEBUI_ENABLE_OAUTH_SIGNUP", "false") // Disable OAuth signup
+        .env("WEBUI_ENABLE_LDAP", "false") // Disable LDAP
+        .env("WEBUI_DEFAULT_USER_ROLE", "admin") // Default role when auth is disabled
+        .env("WEBUI_SESSION_COOKIE_SECURE", "false") // Allow insecure cookies for localhost
+        .env("WEBUI_SESSION_COOKIE_SAME_SITE", "lax"); // More permissive cookie policy
 
     let (mut rx, child) = sidecar_command
         .spawn()
         .map_err(|e| format!("Failed to spawn backend process: {}", e))?;
 
-    // Store the process and port
+    // Get the PID for process group management
+    let pid = child.pid();
+
+    // Store the process, PID, and port
     if let Ok(mut process_guard) = state.backend_process.lock() {
         *process_guard = Some(child);
     }
 
+    if let Ok(mut pid_guard) = state.backend_pid.lock() {
+        *pid_guard = Some(pid);
+    }
+
     if let Ok(mut port_guard) = state.backend_port.lock() {
         *port_guard = Some(port);
     }
@@ -119,6 +183,9 @@ async fn start_backend(app: tauri::AppHandle) -> Result<u16, String> {
                         if let Ok(mut process_guard) = state.backend_process.lock() {
                             *process_guard = None;
                         }
+                        if let Ok(mut pid_guard) = state.backend_pid.lock() {
+                            *pid_guard = None;
+                        }
                     }
                     break;
                 }
@@ -148,18 +215,69 @@ async fn get_backend_port(app: tauri::AppHandle) -> Result<u16, String> {
 async fn stop_backend(app: tauri::AppHandle) -> Result<(), String> {
     let state = app.state::<AppState>();
 
-    if let Ok(mut process_guard) = state.backend_process.lock() {
-        if let Some(child) = process_guard.take() {
+    // Get the stored PID first
+    let stored_pid = if let Ok(pid_guard) = state.backend_pid.lock() {
+        *pid_guard
+    } else {
+        None
+    };
+
+    // Get the child process and PID, then release the lock
+    let (child_option, pid_option) = {
+        let mut process_guard = state
+            .backend_process
+            .lock()
+            .map_err(|_| "Failed to acquire process lock".to_string())?;
+
+        let child = process_guard.take();
+        let pid = if let Some(ref child) = child {
+            Some(stored_pid.unwrap_or_else(|| child.pid()))
+        } else {
+            stored_pid
+        };
+
+        (child, pid)
+    }; // Lock is released here
+
+    if let Some(child) = child_option {
+        if let Some(pid) = pid_option {
+            println!("Stopping backend process gracefully...");
+
+            // First try graceful termination (SIGTERM)
+            match graceful_terminate_process_group(pid).await {
+                Ok(_) => {
+                    println!("Backend process group terminated gracefully");
+                }
+                Err(e) => {
+                    eprintln!("Graceful termination failed: {}, trying forceful kill", e);
+                    // Fallback to forceful kill
+                    child
+                        .kill()
+                        .map_err(|e| format!("Failed to kill backend process: {}", e))?;
+
+                    // Also try to kill any remaining processes by name
+                    let _ = kill_orphaned_backends(); // Best effort cleanup
+                }
+            }
+
+            println!("Backend process stopped");
+        } else {
+            // No PID available, just kill the child process
             child
                 .kill()
                 .map_err(|e| format!("Failed to kill backend process: {}", e))?;
         }
     }
 
+    // Clear all stored state
     if let Ok(mut port_guard) = state.backend_port.lock() {
         *port_guard = None;
     }
 
+    if let Ok(mut pid_guard) = state.backend_pid.lock() {
+        *pid_guard = None;
+    }
+
     Ok(())
 }
 
@@ -173,6 +291,78 @@ fn get_data_directory(app: tauri::AppHandle) -> Result<String, String> {
     Ok(app_data_dir.to_string_lossy().to_string())
 }
 
+#[tauri::command]
+fn reset_backend_port(app: tauri::AppHandle) -> Result<(), String> {
+    let app_config_dir = app
+        .path()
+        .app_config_dir()
+        .map_err(|e| format!("Failed to get app config directory: {}", e))?;
+
+    let port_file = app_config_dir.join("backend_port.txt");
+
+    if port_file.exists() {
+        fs::remove_file(&port_file).map_err(|e| format!("Failed to remove port file: {}", e))?;
+    }
+
+    Ok(())
+}
+
+#[tauri::command]
+fn reset_session_data(app: tauri::AppHandle) -> Result<(), String> {
+    let app_config_dir = app
+        .path()
+        .app_config_dir()
+        .map_err(|e| format!("Failed to get app config directory: {}", e))?;
+
+    // Remove port and secret files to force regeneration
+    let port_file = app_config_dir.join("backend_port.txt");
+    let secret_file = app_config_dir.join("webui_secret.txt");
+
+    if port_file.exists() {
+        fs::remove_file(&port_file).map_err(|e| format!("Failed to remove port file: {}", e))?;
+    }
+
+    if secret_file.exists() {
+        fs::remove_file(&secret_file)
+            .map_err(|e| format!("Failed to remove secret file: {}", e))?;
+    }
+
+    Ok(())
+}
+
+#[tauri::command]
+fn kill_orphaned_backends() -> Result<String, String> {
+    use std::process::Command;
+
+    // First try graceful termination with SIGTERM
+    let sigterm_output = Command::new("pkill")
+        .arg("-TERM")
+        .arg("-f")
+        .arg("glowpath-backend")
+        .output();
+
+    // Give processes a moment to shut down gracefully
+    std::thread::sleep(std::time::Duration::from_millis(1000));
+
+    // Then force kill any remaining processes
+    let sigkill_output = Command::new("pkill")
+        .arg("-KILL")
+        .arg("-f")
+        .arg("glowpath-backend")
+        .output();
+
+    match (sigterm_output, sigkill_output) {
+        (Ok(term_result), Ok(kill_result)) => {
+            if term_result.status.success() || kill_result.status.success() {
+                Ok("Successfully cleaned up orphaned backend processes".to_string())
+            } else {
+                Ok("No orphaned backend processes found".to_string())
+            }
+        }
+        (Err(e), _) | (_, Err(e)) => Err(format!("Failed to check for orphaned processes: {}", e)),
+    }
+}
+
 fn find_available_port() -> Result<u16, Box<dyn std::error::Error>> {
     use std::net::TcpListener;
 
@@ -182,6 +372,140 @@ fn find_available_port() -> Result<u16, Box<dyn std::error::Error>> {
     Ok(addr.port())
 }
 
+// Load port from config file, or find an available port and save it
+fn get_or_create_persistent_port(config_dir: &PathBuf) -> Result<u16, Box<dyn std::error::Error>> {
+    let port_file = config_dir.join("backend_port.txt");
+
+    // Try to read existing port
+    if let Ok(port_str) = fs::read_to_string(&port_file) {
+        if let Ok(port) = port_str.trim().parse::<u16>() {
+            // Check if the port is still available
+            if is_port_available(port) {
+                return Ok(port);
+            }
+        }
+    }
+
+    // If no saved port or port is not available, find a new one
+    let port = find_available_port()?;
+
+    // Save the port for future use
+    fs::create_dir_all(config_dir)?;
+    fs::write(&port_file, port.to_string())?;
+
+    Ok(port)
+}
+
+fn is_port_available(port: u16) -> bool {
+    use std::net::TcpListener;
+    use std::time::Duration;
+
+    // Try to bind to the port
+    let result = TcpListener::bind(format!("127.0.0.1:{}", port));
+
+    match result {
+        Ok(listener) => {
+            // Successfully bound, port is available
+            drop(listener); // Close the listener
+
+            // Give a small delay to ensure the port is fully released
+            std::thread::sleep(Duration::from_millis(100));
+            true
+        }
+        Err(_) => {
+            // Failed to bind, port is not available
+            false
+        }
+    }
+}
+
+// Gracefully terminate a process group with timeout
+async fn graceful_terminate_process_group(pid: u32) -> Result<(), Box<dyn std::error::Error>> {
+    use std::process::Command;
+    use std::time::Duration;
+
+    // Send SIGTERM to the entire process group
+    // Using negative PID to target the process group
+    let sigterm_result = Command::new("kill")
+        .arg("-TERM")
+        .arg(format!("-{}", pid)) // Negative PID targets the process group
+        .output();
+
+    match sigterm_result {
+        Ok(output) => {
+            if !output.status.success() {
+                return Err(format!(
+                    "Failed to send SIGTERM to process group {}: {}",
+                    pid,
+                    String::from_utf8_lossy(&output.stderr)
+                )
+                .into());
+            }
+        }
+        Err(e) => {
+            return Err(format!("Failed to execute kill command: {}", e).into());
+        }
+    }
+
+    // Wait up to 5 seconds for graceful shutdown
+    for _ in 0..50 {
+        // Check every 100ms for 5 seconds
+        let check_result = Command::new("kill")
+            .arg("-0") // Signal 0 just checks if process exists
+            .arg(pid.to_string())
+            .output();
+
+        match check_result {
+            Ok(output) => {
+                if !output.status.success() {
+                    // Process no longer exists, graceful shutdown succeeded
+                    println!("Process group {} terminated gracefully", pid);
+                    return Ok(());
+                }
+            }
+            Err(_) => {
+                // Error usually means process doesn't exist
+                println!("Process group {} terminated gracefully", pid);
+                return Ok(());
+            }
+        }
+
+        // Use tauri's async runtime sleep
+        tauri::async_runtime::spawn(async {
+            std::thread::sleep(Duration::from_millis(100));
+        })
+        .await
+        .unwrap();
+    }
+
+    // Timeout occurred, force kill the process group
+    println!(
+        "Graceful termination timed out, force killing process group {}",
+        pid
+    );
+
+    let force_kill_result = Command::new("kill")
+        .arg("-KILL")
+        .arg(format!("-{}", pid)) // Negative PID targets the process group
+        .output();
+
+    match force_kill_result {
+        Ok(output) => {
+            if output.status.success() {
+                Ok(())
+            } else {
+                Err(format!(
+                    "Failed to force kill process group {}: {}",
+                    pid,
+                    String::from_utf8_lossy(&output.stderr)
+                )
+                .into())
+            }
+        }
+        Err(e) => Err(format!("Failed to execute force kill: {}", e).into()),
+    }
+}
+
 #[cfg_attr(mobile, tauri::mobile_entry_point)]
 pub fn run() {
     tauri::Builder::default()
@@ -194,8 +518,22 @@ pub fn run() {
             start_backend,
             get_backend_port,
             stop_backend,
-            get_data_directory
+            get_data_directory,
+            reset_backend_port,
+            reset_session_data,
+            kill_orphaned_backends
         ])
+        .on_window_event(|window, event| {
+            if let tauri::WindowEvent::CloseRequested { .. } = event {
+                println!("App closing, stopping backend...");
+                let app_handle = window.app_handle().clone();
+                tauri::async_runtime::spawn(async move {
+                    if let Err(e) = stop_backend(app_handle).await {
+                        eprintln!("Failed to stop backend on app exit: {}", e);
+                    }
+                });
+            }
+        })
         .setup(|app| {
             // Optionally start backend on app startup
             let app_handle = app.handle().clone();

src-tauri/tauri.conf.json

@@ -19,7 +19,8 @@
     ],
     "security": {
       "csp": null
-    }
+    },
+    "withGlobalTauri": false
   },
   "bundle": {
     "active": true,

src/lib/backend.ts

@@ -79,6 +79,24 @@ class BackendService {
     return await invoke<string>("get_data_directory");
   }
 
+  async resetPort(): Promise<void> {
+    await invoke("reset_backend_port");
+    // Clear the current state
+    this.port = null;
+    this.baseUrl = null;
+  }
+
+  async resetSessionData(): Promise<void> {
+    await invoke("reset_session_data");
+    // Clear the current state
+    this.port = null;
+    this.baseUrl = null;
+  }
+
+  async killOrphanedBackends(): Promise<string> {
+    return await invoke<string>("kill_orphaned_backends");
+  }
+
   async fetch(path: string, options?: RequestInit): Promise<Response> {
     if (!this.baseUrl) {
       throw new Error("Backend service not initialized");