fix: sysVer of older CentOS

lib/data/model/server/conn_status.dart

@@ -4,7 +4,7 @@ import '../../res/misc.dart';
 ///
 /// Code generated by jsonToDartModel https://ashamp.github.io/jsonToDartModel/
 ///
-class TcpStatus {
+class ConnStatus {
 /*
 {
   "maxConn": 0,
@@ -19,37 +19,21 @@ class TcpStatus {
   late int passive;
   late int fail;
 
-  TcpStatus(
+  ConnStatus(
     this.maxConn,
     this.active,
     this.passive,
     this.fail,
   );
-
-  TcpStatus.fromJson(Map<String, dynamic> json) {
-    maxConn = json["maxConn"].toInt();
-    active = json["active"].toInt();
-    passive = json["passive"].toInt();
-    fail = json["fail"].toInt();
-  }
-
-  Map<String, dynamic> toJson() {
-    final Map<String, dynamic> data = <String, dynamic>{};
-    data["maxConn"] = maxConn;
-    data["active"] = active;
-    data["passive"] = passive;
-    data["fail"] = fail;
-    return data;
-  }
 }
 
-TcpStatus? parseTcp(String raw) {
+ConnStatus? parseConn(String raw) {
   final lines = raw.split('\n');
   final idx = lines.lastWhere((element) => element.startsWith('Tcp:'),
       orElse: () => '');
   if (idx != '') {
     final vals = idx.split(numReg);
-    return TcpStatus(vals[5].i, vals[6].i, vals[7].i, vals[8].i);
+    return ConnStatus(vals[5].i, vals[6].i, vals[7].i, vals[8].i);
   }
   return null;
 }

lib/data/model/server/server_status.dart

@@ -2,41 +2,16 @@ import 'package:toolbox/data/model/server/cpu_status.dart';
 import 'package:toolbox/data/model/server/disk_info.dart';
 import 'package:toolbox/data/model/server/memory.dart';
 import 'package:toolbox/data/model/server/net_speed.dart';
-import 'package:toolbox/data/model/server/tcp_status.dart';
-
-///
-/// Code generated by jsonToDartModel https://ashamp.github.io/jsonToDartModel/
-///
+import 'package:toolbox/data/model/server/conn_status.dart';
 
 class ServerStatus {
-/*
-{
-  "cpuPercent": 0,
-  "memList": [
-    1
-  ],
-  "sysVer": "",
-  "uptime": "",
-  "disk": [
-    {
-      "mountPath": "",
-      "mountLocation": "",
-      "usedPercent": 0,
-      "used": "",
-      "size": "",
-      "avail": ""
-    }
-  ]
-} 
-*/
-
   CpuStatus cpu;
   Memory mem;
   Swap swap;
   String sysVer;
   String uptime;
   List<DiskInfo> disk;
-  TcpStatus tcp;
+  ConnStatus tcp;
   NetSpeed netSpeed;
   String? failedInfo;
 

lib/data/model/server/server_status_update_req.dart

@@ -1,9 +1,10 @@
+import '../../res/server_cmd.dart';
 import 'cpu_status.dart';
 import 'disk_info.dart';
 import 'memory.dart';
 import 'net_speed.dart';
 import 'server_status.dart';
-import 'tcp_status.dart';
+import 'conn_status.dart';
 
 class ServerStatusUpdateReq {
   final ServerStatus ss;
@@ -12,27 +13,42 @@ class ServerStatusUpdateReq {
   const ServerStatusUpdateReq(this.ss, this.segments);
 }
 
+extension _SegmentsExt on List<String> {
+  String at(CmdType t) {
+    final index = t.index;
+    if (index >= length) return '';
+    return this[index];
+  }
+}
+
 Future<ServerStatus> getStatus(ServerStatusUpdateReq req) async {
-  final net = parseNetSpeed(req.segments[0]);
+  final net = parseNetSpeed(req.segments.at(CmdType.net));
   req.ss.netSpeed.update(net);
-  final sys = _parseSysVer(req.segments[1], req.segments[9]);
+  final sys = _parseSysVer(
+    req.segments.at(CmdType.sys),
+    req.segments.at(CmdType.host),
+    req.segments.at(CmdType.sysRhel),
+  );
   if (sys != null) {
     req.ss.sysVer = sys;
   }
-  final cpus = parseCPU(req.segments[2]);
-  final cpuTemp = parseCPUTemp(req.segments[7], req.segments[8]);
+  final cpus = parseCPU(req.segments.at(CmdType.cpu));
+  final cpuTemp = parseCPUTemp(
+    req.segments.at(CmdType.tempType),
+    req.segments.at(CmdType.tempVal),
+  );
   req.ss.cpu.update(cpus, cpuTemp);
-  final tcp = parseTcp(req.segments[4]);
+  final tcp = parseConn(req.segments.at(CmdType.conn));
   if (tcp != null) {
     req.ss.tcp = tcp;
   }
-  req.ss.disk = parseDisk(req.segments[5]);
-  req.ss.mem = parseMem(req.segments[6]);
-  final uptime = _parseUpTime(req.segments[3]);
+  req.ss.disk = parseDisk(req.segments.at(CmdType.disk));
+  req.ss.mem = parseMem(req.segments.at(CmdType.mem));
+  final uptime = _parseUpTime(req.segments.at(CmdType.uptime));
   if (uptime != null) {
     req.ss.uptime = uptime;
   }
-  req.ss.swap = parseSwap(req.segments[6]);
+  req.ss.swap = parseSwap(req.segments.at(CmdType.mem));
   return req.ss;
 }
 
@@ -49,7 +65,10 @@ String? _parseUpTime(String raw) {
   return null;
 }
 
-String? _parseSysVer(String raw, String hostname) {
+String? _parseSysVer(String raw, String hostname, String rawRhel) {
+  if (!rawRhel.contains('No such file')) {
+    return rawRhel;
+  }
   final s = raw.split('=');
   if (s.length == 2) {
     return s[1].replaceAll('"', '').replaceFirst('\n', '');