🐛 修复退出程序后 aria2 依然在后台

src-tauri/src/utils/download_manager.rs

@@ -14,6 +14,7 @@ pub struct DownloadManager {
     queue: Mutex<HashMap<String, DownloadTask>>,
     aria2_started: Arc<AtomicBool>,
     aria2_port: Arc<Mutex<u16>>,
+    aria2_pid: Arc<Mutex<Option<u32>>>,
 }
 
 impl DownloadManager {
@@ -22,6 +23,7 @@ impl DownloadManager {
             queue: Mutex::new(HashMap::new()),
             aria2_started: Arc::new(AtomicBool::new(false)),
             aria2_port: Arc::new(Mutex::new(5144)),
+            aria2_pid: Arc::new(Mutex::new(None)), 
         }
     }
 
@@ -172,7 +174,7 @@ impl DownloadManager {
         }
 
         // 启动 aria2c
-        Command::new("aria2c")
+        let child = Command::new("aria2c")
             .args([
                 "--enable-rpc",
                 "--rpc-listen-all=false",
@@ -182,6 +184,11 @@ impl DownloadManager {
             .spawn()
             .map_err(|e| format!("启动 aria2 失败: {}", e)).unwrap();
 
+        // 保存进程 ID
+        if let Ok(mut pid_guard) = self.aria2_pid.lock() {
+            *pid_guard = Some(child.id());
+        }
+
         self.aria2_started.store(true, Ordering::SeqCst);
     }
 
@@ -346,4 +353,26 @@ impl DownloadManager {
         
         Ok(())
     }
+
+    // 关闭 aria2
+    pub fn shutdown_aria2(&self) {
+        if self.aria2_started.load(Ordering::SeqCst) {
+            // 获取保存的 PID
+            if let Ok(pid_guard) = self.aria2_pid.lock() {
+                if let Some(pid) = *pid_guard {
+                    // 使用 kill 命令终止特定的进程
+                    if let Ok(output) = Command::new("kill")
+                        .arg(pid.to_string())
+                        .output() {
+                        if output.status.success() {
+                            println!("成功关闭 aria2 (PID: {})", pid);
+                        } else {
+                            eprintln!("关闭 aria2 失败 (PID: {})", pid);
+                        }
+                    }
+                }
+            }
+            self.aria2_started.store(false, Ordering::SeqCst);
+        }
+    }
 }