Use new experimental delay everywhere

ArchiSteamFarm/Bot.cs

@@ -210,9 +210,11 @@ namespace ArchiSteamFarm {
 				return;
 			}
 
-			SteamClient.Connect();
 			IsRunning = true;
 
+			Program.LimitSteamRequests();
+			SteamClient.Connect();
+
 			Task.Run(() => HandleCallbacks());
 		}
 
@@ -368,7 +370,7 @@ namespace ArchiSteamFarm {
 			}
 
 			Logging.LogGenericWarning(BotName, "Disconnected from Steam, reconnecting...");
-			await Utilities.SleepAsync(CallbackSleep).ConfigureAwait(false);
+			await Program.LimitSteamRequestsAsync().ConfigureAwait(false);
 			SteamClient.Connect();
 		}
 
@@ -528,7 +530,6 @@ namespace ArchiSteamFarm {
 				case EResult.TryAnotherCM:
 					Logging.LogGenericWarning(BotName, "Unable to login to Steam: " + callback.Result + " / " + callback.ExtendedResult + ", retrying...");
 					await Stop().ConfigureAwait(false);
-					await Utilities.SleepAsync(CallbackSleep).ConfigureAwait(false);
 					Start();
 					break;
 				default:

ArchiSteamFarm/Program.cs

@@ -44,6 +44,7 @@ namespace ArchiSteamFarm {
 		private const string LatestGithubReleaseURL = "https://api.github.com/repos/JustArchi/ArchiSteamFarm/releases/latest";
 
 		internal static readonly object ConsoleLock = new object();
+		private static readonly SemaphoreSlim SteamSemaphore = new SemaphoreSlim(1);
 		private static readonly ManualResetEvent ShutdownResetEvent = new ManualResetEvent(false);
 		private static readonly Assembly Assembly = Assembly.GetExecutingAssembly();
 		private static readonly string ExecutablePath = Assembly.Location;
@@ -89,6 +90,18 @@ namespace ArchiSteamFarm {
 			Environment.Exit(0);
 		}
 
+		internal static async Task LimitSteamRequestsAsync() {
+			await SteamSemaphore.WaitAsync().ConfigureAwait(false);
+			await Utilities.SleepAsync(Utilities.GetRandomDelay() * 1000).ConfigureAwait(false); // We must add some delay to not get caught by Steam anty-DoS
+			SteamSemaphore.Release();
+		}
+
+		internal static void LimitSteamRequests() {
+			SteamSemaphore.Wait();
+			Thread.Sleep(Utilities.GetRandomDelay() * 1000); // We must add some delay to not get caught by Steam anty-DoS
+			SteamSemaphore.Release();
+		}
+
 		internal static string GetUserInput(string botLogin, EUserInputType userInputType) {
 			string result;
 			lock (ConsoleLock) {
@@ -150,9 +163,8 @@ namespace ArchiSteamFarm {
 				if (!bot.Enabled) {
 					Logging.LogGenericInfo(botName, "Not starting this instance because it's disabled in config file");
 				}
-				Random random = new Random();
-                		int randomNumber = random.Next(5, 15); // pick random number between 5 and 15
-                		Thread.Sleep(randomNumber*1000); // Try to avoid spamming steam
+
+				LimitSteamRequests(); // We must add some delay to not get caught by Steam anty-DoS
 			}
 
 			// Check if we got any bots running

ArchiSteamFarm/Utilities.cs

@@ -35,10 +35,16 @@ using System.Threading.Tasks;
 
 namespace ArchiSteamFarm {
 	internal static class Utilities {
+		private static readonly Random Random = new Random();
+
 		internal static async Task SleepAsync(int miliseconds) {
 			await Task.Delay(miliseconds).ConfigureAwait(false);
 		}
 
+		internal static int GetRandomDelay() {
+			return Random.Next(5, 16);
+		}
+
 		internal static ulong OnlyNumbers(string inputString) {
 			if (string.IsNullOrEmpty(inputString)) {
 				return 0;