fix (#195) & opt.

- fix: debug provider color
- fix: can't write script through SFTP (#195)
- opt.: go next refresh only after current refresh task is done

lib/core/utils/server.dart

@@ -49,6 +49,7 @@ Future<SSHClient> genClient(
 
   /// [ServerPrivateInfo] of the jump server
   ServerPrivateInfo? jumpSpi,
+  String? jumpPrivateKey,
 }) async {
   onStatus?.call(GenSSHClientStatus.socket);
   SSHSocket? socket;
@@ -76,14 +77,13 @@ Future<SSHClient> genClient(
     if (jumpSpi != null) {
       final jumpClient = await genClient(
         jumpSpi,
-        privateKey: privateKey,
+        privateKey: jumpPrivateKey,
         timeout: timeout,
       );
       // Use `0.0.0.0` as localhost to use all interfaces.
       return await jumpClient.forwardLocal(
         spi.ip,
         spi.port,
-        localHost: '0.0.0.0',
       );
     }
   }();

lib/data/model/app/shell_func.dart

@@ -5,13 +5,7 @@ const seperator = 'SrvBoxSep';
 
 /// The suffix `\t` is for formatting
 const _cmdDivider = '\necho $seperator\n\t';
-
-const _serverBoxDir = r'$HOME/.config/server_box';
-
-/// Issue #159
-/// Use script commit count as version of shell script.
-/// So different version of app can run at the same time.
-const installShellPath = '$_serverBoxDir/mobile_v${BuildData.script}.sh';
+const _homeVar = '\$HOME';
 
 enum ShellFunc {
   status,
@@ -22,6 +16,31 @@ enum ShellFunc {
   suspend,
   ;
 
+  static const _serverBoxDir = '.config/server_box';
+  static const _scriptFileName = 'mobile_v${BuildData.script}.sh';
+
+  /// Issue #159
+  ///
+  /// Use script commit count as version of shell script.
+  ///
+  /// So different version of app can run at the same time.
+  ///
+  /// **Can't** use it in SFTP, because SFTP can't recognize `$HOME`
+  static String getShellPath(String home) =>
+      '$home/$_serverBoxDir/$_scriptFileName';
+
+  static final _installShellPath = getShellPath(_homeVar);
+
+  /// Issue #168
+  /// Use `sh` for compatibility
+  static final installShellCmd = """
+mkdir -p $_homeVar/$_serverBoxDir
+cat << 'EOF' > $_installShellPath
+${ShellFunc.allScript}
+EOF
+chmod +x $_installShellPath
+""";
+
   String get flag {
     switch (this) {
       case ShellFunc.status:
@@ -39,7 +58,7 @@ enum ShellFunc {
     }
   }
 
-  String get exec => 'sh $installShellPath -$flag';
+  String get exec => 'sh $_installShellPath -$flag';
 
   String get name {
     switch (this) {
@@ -241,13 +260,3 @@ const _bsdStatusCmd = [
   //'sysctl -a | grep temperature',
   'hostname',
 ];
-
-/// Issue #168
-/// Use `sh` for compatibility
-final installShellCmd = """
-mkdir -p $_serverBoxDir
-cat << 'EOF' > $installShellPath
-${ShellFunc.allScript}
-EOF
-chmod +x $installShellPath
-""";

lib/data/model/server/server.dart

@@ -10,9 +10,8 @@ class Server implements TagPickable {
   SSHClient? client;
   ServerState state;
 
-  /// Whether is generating client.
-  /// Use this to avoid reconnecting if last connect try not finished.
-  bool isGenerating = false;
+  /// Whether is connectting, parsing and etc.
+  bool isBusy = false;
 
   Server(this.spi, this.status, this.client, this.state);
 

lib/data/provider/debug.dart

@@ -5,8 +5,8 @@ import 'package:toolbox/data/res/ui.dart';
 import '../../data/res/misc.dart';
 
 const _level2Color = {
-  '[INFO]': Colors.blue,
-  '[WARNING]': Colors.yellow,
+  'INFO': Colors.blue,
+  'WARNING': Colors.yellow,
 };
 
 class DebugProvider extends ChangeNotifier {

lib/data/provider/server.dart

@@ -246,6 +246,15 @@ class ServerProvider extends ChangeNotifier {
 
   void _setServerState(Server s, ServerState ss) {
     s.state = ss;
+
+    /// Only set [Sever.isBusy] to false when err occurs or finished.
+    switch (ss) {
+      case ServerState.failed || ServerState.finished:
+        s.isBusy = false;
+        break;
+      default:
+        break;
+    }
     notifyListeners();
   }
 
@@ -262,19 +271,23 @@ class ServerProvider extends ChangeNotifier {
       return;
     }
 
+    /// If busy, it may be because of network reasons that the last request
+    /// has not been completed, and the request should not be made again at this time.
+    if (s.isBusy) return;
+    s.isBusy = true;
+
     if (s.state.shouldConnect || (s.client?.isClosed ?? true)) {
       _setServerState(s, ServerState.connecting);
 
       final time1 = DateTime.now();
+      final jumpSpi =
+          spi.jumpId == null ? null : Stores.server.box.get(spi.jumpId);
 
       try {
-        if (s.isGenerating) return;
-        s.isGenerating = true;
         s.client = await genClient(
           spi,
           timeout: Stores.setting.timeoutD,
-          jumpSpi:
-              spi.jumpId == null ? null : Stores.server.box.get(spi.jumpId),
+          jumpSpi: jumpSpi,
         );
       } catch (e) {
         _limiter.inc(sid);
@@ -284,33 +297,43 @@ class ServerProvider extends ChangeNotifier {
         /// In order to keep privacy, print [spi.name] instead of [spi.id]
         Loggers.app.warning('Connect to ${spi.name} failed', e);
         return;
-      } finally {
-        s.isGenerating = false;
       }
 
       final time2 = DateTime.now();
       final spentTime = time2.difference(time1).inMilliseconds;
+      if (spi.jumpId == null) {
         Loggers.app.info('Connected to ${spi.name} in $spentTime ms.');
+      } else {
+        Loggers.app.info(
+            'Connected to ${spi.name} via ${jumpSpi?.name} in $spentTime ms.');
+      }
 
       _setServerState(s, ServerState.connected);
 
       // Write script to server
       // by ssh
       try {
-        final writeResult = await s.client?.run(installShellCmd).string;
+        final writeResult =
+            await s.client?.run(ShellFunc.installShellCmd).string;
         if (writeResult == null || writeResult.isNotEmpty) {
           throw Exception('$writeResult');
         }
       } catch (e) {
+        Loggers.app.warning('Write script to ${spi.name} by shell', e);
         // by sftp
         final localPath = joinPath(await Paths.doc, 'install.sh');
         final file = File(localPath);
         try {
-          Loggers.app.warning('Using SFTP to write script to ${spi.name}');
+          Loggers.app.info('Using SFTP to write script to ${spi.name}');
           file.writeAsString(ShellFunc.allScript);
           final completer = Completer();
+          final homePath = (await s.client?.run('echo \$HOME').string)?.trim();
+          if (homePath == null || homePath.isEmpty) {
+            throw Exception('Got home path: $homePath');
+          }
+          final remotePath = ShellFunc.getShellPath(homePath);
           final reqId = Pros.sftp.add(
-            SftpReq(spi, installShellPath, localPath, SftpReqType.upload),
+            SftpReq(spi, remotePath, localPath, SftpReqType.upload),
             completer: completer,
           );
           await completer.future;
@@ -322,7 +345,7 @@ class ServerProvider extends ChangeNotifier {
           _limiter.inc(sid);
           s.status.failedInfo = e.toString();
           _setServerState(s, ServerState.failed);
-          Loggers.app.warning('Write script to ${spi.name} failed', e);
+          Loggers.app.warning('Write script to ${spi.name} by sftp', e);
           return;
         } finally {
           if (await file.exists()) await file.delete();
@@ -382,11 +405,8 @@ class ServerProvider extends ChangeNotifier {
       return;
     }
 
-    if (s.state != ServerState.finished) {
+    /// Call this every time for setting [Server.isBusy] to false
     _setServerState(s, ServerState.finished);
-    } else {
-      notifyListeners();
-    }
     // reset try times only after prepared successfully
     _limiter.reset(sid);
   }

lib/main.dart

@@ -1,3 +1,5 @@
+// ignore_for_file: avoid_print
+
 import 'dart:async';
 
 import 'package:flutter/material.dart';
@@ -110,8 +112,8 @@ void _setupLogger() {
   Logger.root.level = Level.ALL;
   Logger.root.onRecord.listen((record) {
     Pros.debug.addLog(record);
-    // ignore: avoid_print
     print(record);
+    if (record.stackTrace != null) print(record.stackTrace);
   });
 }