Fix reconnect. Fix #894

mirai-core/src/commonMain/kotlin/AbstractBot.kt

@@ -96,16 +96,14 @@ internal abstract class AbstractBot<N : BotNetworkHandler> constructor(
             priority = MONITOR,
             concurrency = ConcurrencyKind.LOCKED
         ) { event ->
-            if (!event.bot.isActive) {
-                // bot closed
-                return@subscribeAlways
-            }
-            if (!::_network.isInitialized) {
-                // bot 还未登录就被 close
-                return@subscribeAlways
-            }
-            if (_isConnecting) {
-                // bot 还在登入
+            if (
+                !event.bot.isActive // bot closed
+                || !::_network.isInitialized // bot 还未登录就被 close
+                || _isConnecting // bot 还在登入
+            ) {
+                // Close network to avoid endless reconnection while network is ok
+                // https://github.com/mamoe/mirai/issues/894
+                kotlin.runCatching { network.close(event.castOrNull<BotOfflineEvent.CauseAware>()?.cause) }
                 return@subscribeAlways
             }
             /*
@@ -167,13 +165,20 @@ internal abstract class AbstractBot<N : BotNetworkHandler> constructor(
                     if (tryCount != 0) {
                         delay(configuration.reconnectPeriodMillis)
                     }
-                    network.withConnectionLock {
-                        /**
-                         * [AbstractBot.relogin] only, no [BotNetworkHandler.init]
-                         */
-                        @OptIn(ThisApiMustBeUsedInWithConnectionLockBlock::class)
-                        relogin((event as? BotOfflineEvent.Dropped)?.cause)
-                    }
+
+
+                    // Close network to avoid endless reconnection while network is ok
+                    // https://github.com/mamoe/mirai/issues/894
+                    kotlin.runCatching { network.close(event.castOrNull<BotOfflineEvent.CauseAware>()?.cause) }
+
+                    login()
+//                    network.withConnectionLock {
+//                        /**
+//                         * [AbstractBot.relogin] only, no [BotNetworkHandler.init]
+//                         */
+//                        @OptIn(ThisApiMustBeUsedInWithConnectionLockBlock::class)
+//                        relogin((event as? BotOfflineEvent.Dropped)?.cause)
+//                    }
                     launch {
                         BotReloginEvent(bot, (event as? BotOfflineEvent.CauseAware)?.cause).broadcast()
                     }