Add headlness mode

1. Make sure that every call to steamcommunity has active session
2. Move whole userspace logic for session handling to ArchiWebHandler (and Bot)
3. Implement session caching and TTL so we won't send IsLoggedIn() on each ArchiWebHandler call
4. Instead of restarting whole steam account, just refresh the session via ArchiWebHandler instead

ArchiSteamFarm/ArchiHandler.cs

@@ -257,6 +257,7 @@ namespace ArchiSteamFarm {
 			request.Body.key = key;
 
 			Client.Send(request);
+
 			try {
 				return await new AsyncJob<PurchaseResponseCallback>(Client, request.SourceJobID);
 			} catch (Exception e) {

ArchiSteamFarm/ArchiWebHandler.cs

@@ -32,21 +32,22 @@ using System.Net.Http;
 using System.Text;
 using System.Threading.Tasks;
 using System.Xml;
+using System.Threading;
 
 namespace ArchiSteamFarm {
 	internal sealed class ArchiWebHandler {
 		private const string SteamCommunity = "steamcommunity.com";
+		private const byte MinSessionTTL = 15; // Assume session is valid for at least that amount of seconds
 
 		private static string SteamCommunityURL = "https://" + SteamCommunity;
 
-		private static int Timeout = 30 * 1000;
+		private static int Timeout = GlobalConfig.DefaultHttpTimeout * 1000;
 
 		private readonly Bot Bot;
 		private readonly Dictionary<string, string> Cookie = new Dictionary<string, string>(4);
+		private readonly SemaphoreSlim SessionSemaphore = new SemaphoreSlim(1);
 
-		internal bool IsInitialized { get; private set; }
-
-		private ulong SteamID;
+		private DateTime LastSessionRefreshCheck = DateTime.MinValue;
 
 		internal static void Init() {
 			Timeout = Program.GlobalConfig.HttpTimeout * 1000;
@@ -61,18 +62,14 @@ namespace ArchiSteamFarm {
 			Bot = bot;
 		}
 
-		internal void OnDisconnected() {
-			IsInitialized = false;
-		}
-
-		internal async Task<bool> Init(SteamClient steamClient, string webAPIUserNonce, string parentalPin) {
-			if (steamClient == null || steamClient.SteamID == null || string.IsNullOrEmpty(webAPIUserNonce) || IsInitialized) {
+		internal bool Init(SteamClient steamClient, string webAPIUserNonce, string parentalPin) {
+			if (steamClient == null || steamClient.SteamID == null || string.IsNullOrEmpty(webAPIUserNonce)) {
 				return false;
 			}
 
-			SteamID = steamClient.SteamID;
+			ulong steamID = steamClient.SteamID;
 
-			string sessionID = Convert.ToBase64String(Encoding.UTF8.GetBytes(SteamID.ToString()));
+			string sessionID = Convert.ToBase64String(Encoding.UTF8.GetBytes(steamID.ToString()));
 
 			// Generate an AES session key
 			byte[] sessionKey = CryptoHelper.GenerateRandomBlock(32);
@@ -99,7 +96,7 @@ namespace ArchiSteamFarm {
 
 				try {
 					authResult = iSteamUserAuth.AuthenticateUser(
-						steamid: SteamID,
+						steamid: steamID,
 						sessionkey: Encoding.ASCII.GetString(WebUtility.UrlEncodeToBytes(cryptedSessionKey, 0, cryptedSessionKey.Length)),
 						encrypted_loginkey: Encoding.ASCII.GetString(WebUtility.UrlEncodeToBytes(cryptedLoginKey, 0, cryptedLoginKey.Length)),
 						method: WebRequestMethods.Http.Post,
@@ -127,17 +124,15 @@ namespace ArchiSteamFarm {
 			// The below is used for display purposes only
 			Cookie["webTradeEligibility"] = "{\"allowed\":0,\"reason\":0,\"allowed_at_time\":0,\"steamguard_required_days\":0,\"sales_this_year\":0,\"max_sales_per_year\":0,\"forms_requested\":0}";
 
-			await UnlockParentalAccount(parentalPin).ConfigureAwait(false);
+			if (!UnlockParentalAccount(parentalPin).Result) {
+				return false;
+			}
 
-			IsInitialized = true;
+			LastSessionRefreshCheck = DateTime.Now;
 			return true;
 		}
 
 		internal async Task<bool?> IsLoggedIn() {
-			if (SteamID == 0) {
-				return false;
-			}
-
 			HtmlDocument htmlDocument = null;
 			for (byte i = 0; i < WebBrowser.MaxRetries && htmlDocument == null; i++) {
 				htmlDocument = await WebBrowser.UrlGetToHtmlDocument(SteamCommunityURL + "/my/profile", Cookie).ConfigureAwait(false);
@@ -152,23 +147,42 @@ namespace ArchiSteamFarm {
 			return htmlNode != null;
 		}
 
-		internal async Task<bool> ReconnectIfNeeded() {
-			bool? isLoggedIn = await IsLoggedIn().ConfigureAwait(false);
-			if (isLoggedIn.HasValue && !isLoggedIn.Value) {
-				Logging.LogGenericInfo("Reconnecting because our sessionID expired!", Bot.BotName);
-				Bot.RestartIfRunning().Forget();
+		internal async Task<bool> RefreshSessionIfNeeded() {
+			DateTime now = DateTime.Now;
+			if (now.Subtract(LastSessionRefreshCheck).TotalSeconds < MinSessionTTL) {
 				return true;
 			}
 
-			return false;
+			await SessionSemaphore.WaitAsync().ConfigureAwait(false);
+
+			now = DateTime.Now;
+			if (now.Subtract(LastSessionRefreshCheck).TotalSeconds < MinSessionTTL) {
+				SessionSemaphore.Release();
+				return true;
+			}
+
+			bool result;
+
+			bool? isLoggedIn = await IsLoggedIn().ConfigureAwait(false);
+			if (isLoggedIn.GetValueOrDefault(true)) {
+				result = true;
+				now = DateTime.Now;
+				LastSessionRefreshCheck = now;
+			} else {
+				Logging.LogGenericInfo("Refreshing our session!", Bot.BotName);
+				result = await Bot.RefreshSession().ConfigureAwait(false);
+			}
+
+			SessionSemaphore.Release();
+			return result;
 		}
 
 		internal async Task<Dictionary<uint, string>> GetOwnedGames() {
-			if (SteamID == 0) {
+			if (!await RefreshSessionIfNeeded().ConfigureAwait(false)) {
 				return null;
 			}
 
-			string request = SteamCommunityURL + "/profiles/" + SteamID + "/games/?xml=1";
+			string request = SteamCommunityURL + "/my/games/?xml=1";
 
 			XmlDocument response = null;
 			for (byte i = 0; i < WebBrowser.MaxRetries && response == null; i++) {
@@ -273,6 +287,10 @@ namespace ArchiSteamFarm {
 				return false;
 			}
 
+			if (!await RefreshSessionIfNeeded().ConfigureAwait(false)) {
+				return false;
+			}
+
 			string sessionID;
 			if (!Cookie.TryGetValue("sessionid", out sessionID)) {
 				return false;
@@ -303,6 +321,10 @@ namespace ArchiSteamFarm {
 				return false;
 			}
 
+			if (!await RefreshSessionIfNeeded().ConfigureAwait(false)) {
+				return false;
+			}
+
 			string sessionID;
 			if (!Cookie.TryGetValue("sessionid", out sessionID)) {
 				return false;
@@ -330,37 +352,11 @@ namespace ArchiSteamFarm {
 			return true;
 		}
 
-		internal bool DeclineTradeOffer(ulong tradeID) {
-			if (tradeID == 0 || string.IsNullOrEmpty(Bot.BotConfig.SteamApiKey)) {
-				return false;
-			}
-
-			KeyValue response = null;
-			using (dynamic iEconService = WebAPI.GetInterface("IEconService", Bot.BotConfig.SteamApiKey)) {
-				iEconService.Timeout = Timeout;
-
-				for (byte i = 0; i < WebBrowser.MaxRetries && response == null; i++) {
-					try {
-						response = iEconService.DeclineTradeOffer(
-							tradeofferid: tradeID.ToString(),
-							method: WebRequestMethods.Http.Post,
-							secure: !Program.GlobalConfig.ForceHttp
-						);
-					} catch (Exception e) {
-						Logging.LogGenericException(e, Bot.BotName);
-					}
-				}
-			}
-
-			if (response == null) {
-				Logging.LogGenericWTF("Request failed even after " + WebBrowser.MaxRetries + " tries", Bot.BotName);
-				return false;
-			}
-
-			return true;
-		}
-
 		internal async Task<List<Steam.Item>> GetMyTradableInventory() {
+			if (!await RefreshSessionIfNeeded().ConfigureAwait(false)) {
+				return null;
+			}
+
 			JObject jObject = null;
 			for (byte i = 0; i < WebBrowser.MaxRetries && jObject == null; i++) {
 				jObject = await WebBrowser.UrlGetToJObject(SteamCommunityURL + "/my/inventory/json/753/6?trading=1", Cookie).ConfigureAwait(false);
@@ -394,6 +390,10 @@ namespace ArchiSteamFarm {
 				return false;
 			}
 
+			if (!await RefreshSessionIfNeeded().ConfigureAwait(false)) {
+				return false;
+			}
+
 			string sessionID;
 			if (!Cookie.TryGetValue("sessionid", out sessionID)) {
 				return false;
@@ -449,13 +449,17 @@ namespace ArchiSteamFarm {
 		}
 
 		internal async Task<HtmlDocument> GetBadgePage(byte page) {
-			if (page == 0 || SteamID == 0) {
+			if (page == 0) {
+				return null;
+			}
+
+			if (!await RefreshSessionIfNeeded().ConfigureAwait(false)) {
 				return null;
 			}
 
 			HtmlDocument htmlDocument = null;
 			for (byte i = 0; i < WebBrowser.MaxRetries && htmlDocument == null; i++) {
-				htmlDocument = await WebBrowser.UrlGetToHtmlDocument(SteamCommunityURL + "/profiles/" + SteamID + "/badges?l=english&p=" + page, Cookie).ConfigureAwait(false);
+				htmlDocument = await WebBrowser.UrlGetToHtmlDocument(SteamCommunityURL + "/my/badges?l=english&p=" + page, Cookie).ConfigureAwait(false);
 			}
 
 			if (htmlDocument == null) {
@@ -467,13 +471,17 @@ namespace ArchiSteamFarm {
 		}
 
 		internal async Task<HtmlDocument> GetGameCardsPage(ulong appID) {
-			if (appID == 0 || SteamID == 0) {
+			if (appID == 0) {
+				return null;
+			}
+
+			if (!await RefreshSessionIfNeeded().ConfigureAwait(false)) {
 				return null;
 			}
 
 			HtmlDocument htmlDocument = null;
 			for (byte i = 0; i < WebBrowser.MaxRetries && htmlDocument == null; i++) {
-				htmlDocument = await WebBrowser.UrlGetToHtmlDocument(SteamCommunityURL + "/profiles/" + SteamID + "/gamecards/" + appID + "?l=english", Cookie).ConfigureAwait(false);
+				htmlDocument = await WebBrowser.UrlGetToHtmlDocument(SteamCommunityURL + "/my/gamecards/" + appID + "?l=english", Cookie).ConfigureAwait(false);
 			}
 
 			if (htmlDocument == null) {
@@ -485,13 +493,13 @@ namespace ArchiSteamFarm {
 		}
 
 		internal async Task<bool> MarkInventory() {
-			if (SteamID == 0) {
+			if (!await RefreshSessionIfNeeded().ConfigureAwait(false)) {
 				return false;
 			}
 
 			HttpResponseMessage response = null;
 			for (byte i = 0; i < WebBrowser.MaxRetries && response == null; i++) {
-				response = await WebBrowser.UrlGet(SteamCommunityURL + "/profiles/" + SteamID + "/inventory", Cookie).ConfigureAwait(false);
+				response = await WebBrowser.UrlGet(SteamCommunityURL + "/my/inventory", Cookie).ConfigureAwait(false);
 			}
 
 			if (response == null) {
@@ -507,6 +515,10 @@ namespace ArchiSteamFarm {
 				return false;
 			}
 
+			if (!await RefreshSessionIfNeeded().ConfigureAwait(false)) {
+				return false;
+			}
+
 			string sessionID;
 			if (!Cookie.TryGetValue("sessionid", out sessionID)) {
 				return false;
@@ -530,9 +542,9 @@ namespace ArchiSteamFarm {
 			return true;
 		}
 
-		private async Task UnlockParentalAccount(string parentalPin) {
+		private async Task<bool> UnlockParentalAccount(string parentalPin) {
 			if (string.IsNullOrEmpty(parentalPin) || parentalPin.Equals("0")) {
-				return;
+				return true;
 			}
 
 			Logging.LogGenericInfo("Unlocking parental account...", Bot.BotName);
@@ -550,13 +562,13 @@ namespace ArchiSteamFarm {
 
 			if (response == null) {
 				Logging.LogGenericWTF("Request failed even after " + WebBrowser.MaxRetries + " tries", Bot.BotName);
-				return;
+				return false;
 			}
 
 			IEnumerable<string> setCookieValues;
 			if (!response.Headers.TryGetValues("Set-Cookie", out setCookieValues)) {
 				Logging.LogNullError("setCookieValues", Bot.BotName);
-				return;
+				return false;
 			}
 
 			foreach (string setCookieValue in setCookieValues) {
@@ -573,10 +585,11 @@ namespace ArchiSteamFarm {
 
 				Cookie["steamparental"] = setCookie;
 				Logging.LogGenericInfo("Success!", Bot.BotName);
-				return;
+				return true;
 			}
 
 			Logging.LogGenericWarning("Failed to unlock parental account!", Bot.BotName);
+			return false;
 		}
 	}
 }

ArchiSteamFarm/Bot.cs

@@ -187,6 +187,7 @@ namespace ArchiSteamFarm {
 			CallbackManager.Subscribe<SteamUser.LoggedOnCallback>(OnLoggedOn);
 			CallbackManager.Subscribe<SteamUser.LoginKeyCallback>(OnLoginKey);
 			CallbackManager.Subscribe<SteamUser.UpdateMachineAuthCallback>(OnMachineAuth);
+			CallbackManager.Subscribe<SteamUser.WebAPIUserNonceCallback>(OnWebAPIUserNonce);
 
 			CallbackManager.Subscribe<ArchiHandler.NotificationsCallback>(OnNotifications);
 			CallbackManager.Subscribe<ArchiHandler.OfflineMessageCallback>(OnOfflineMessage);
@@ -196,16 +197,16 @@ namespace ArchiSteamFarm {
 			CardsFarmer = new CardsFarmer(this);
 			Trading = new Trading(this);
 
-			if (BotConfig.AcceptConfirmationsPeriod > 0) {
+			if (AcceptConfirmationsTimer == null && BotConfig.AcceptConfirmationsPeriod > 0) {
 				AcceptConfirmationsTimer = new Timer(
-					async e => await AcceptConfirmations().ConfigureAwait(false),
+					async e => await AcceptConfirmations(true).ConfigureAwait(false),
 					null,
 					TimeSpan.FromMinutes(BotConfig.AcceptConfirmationsPeriod), // Delay
 					TimeSpan.FromMinutes(BotConfig.AcceptConfirmationsPeriod) // Period
 				);
 			}
 
-			if (BotConfig.SendTradePeriod > 0) {
+			if (SendItemsTimer == null && BotConfig.SendTradePeriod > 0) {
 				SendItemsTimer = new Timer(
 					async e => await ResponseSendTrade(BotConfig.SteamMasterID).ConfigureAwait(false),
 					null,
@@ -222,7 +223,7 @@ namespace ArchiSteamFarm {
 			Start().Forget();
 		}
 
-		internal async Task AcceptConfirmations(Confirmation.ConfirmationType allowedConfirmationType = Confirmation.ConfirmationType.Unknown) {
+		internal async Task AcceptConfirmations(bool confirm, Confirmation.ConfirmationType allowedConfirmationType = Confirmation.ConfirmationType.Unknown) {
 			if (BotDatabase.SteamGuardAccount == null) {
 				return;
 			}
@@ -242,10 +243,14 @@ namespace ArchiSteamFarm {
 						continue;
 					}
 
+					if (confirm) {
 						BotDatabase.SteamGuardAccount.AcceptConfirmation(confirmation);
+					} else {
+						BotDatabase.SteamGuardAccount.DenyConfirmation(confirmation);
+					}
 				}
 			} catch (SteamGuardAccount.WGTokenInvalidException) {
-				Logging.LogGenericWarning("Accepting confirmation: Failed!", BotName);
+				Logging.LogGenericWarning("Handling confirmation: Failed!", BotName);
 				Logging.LogGenericWarning("Confirmation could not be accepted because of invalid token exception", BotName);
 				Logging.LogGenericWarning("If issue persists, consider removing and readding ASF 2FA", BotName);
 			} catch (Exception e) {
@@ -261,12 +266,23 @@ namespace ArchiSteamFarm {
 			}
 		}
 
-		internal async Task RestartIfRunning() {
+		internal async Task<bool> RefreshSession() {
 			if (!SteamClient.IsConnected) {
-				return;
+				return false;
 			}
 
-			await Start().ConfigureAwait(false);
+			var userNonce = await SteamUser.RequestWebAPIUserNonce();
+			if (userNonce == null || userNonce.Result != EResult.OK || string.IsNullOrEmpty(userNonce.Nonce)) {
+				Start().Forget();
+				return false;
+			}
+
+			if (!ArchiWebHandler.Init(SteamClient, userNonce.Nonce, BotConfig.SteamParentalPIN)) {
+				Start().Forget();
+				return false;
+			}
+
+			return true;
 		}
 
 		internal async Task OnFarmingFinished(bool farmedSomething) {
@@ -285,17 +301,19 @@ namespace ArchiSteamFarm {
 			}
 
 			if (!message.StartsWith("!")) {
-				return await ResponseRedeem(steamID, BotName, message, true).ConfigureAwait(false);
+				return await ResponseRedeem(steamID, message.Replace(",", Environment.NewLine), true).ConfigureAwait(false);
 			}
 
 			if (!message.Contains(" ")) {
 				switch (message) {
 					case "!2fa":
 						return Response2FA(steamID);
+					case "!2fano":
+						return await Response2FAConfirm(steamID, false).ConfigureAwait(false);
 					case "!2faoff":
 						return Response2FAOff(steamID);
 					case "!2faok":
-						return await Response2FAOK(steamID).ConfigureAwait(false);
+						return await Response2FAConfirm(steamID, true).ConfigureAwait(false);
 					case "!exit":
 						return ResponseExit(steamID);
 					case "!farm":
@@ -326,10 +344,12 @@ namespace ArchiSteamFarm {
 				switch (args[0]) {
 					case "!2fa":
 						return Response2FA(steamID, args[1]);
+					case "!2fano":
+						return await Response2FAConfirm(steamID, args[1], false).ConfigureAwait(false);
 					case "!2faoff":
 						return Response2FAOff(steamID, args[1]);
 					case "!2faok":
-						return await Response2FAOK(steamID, args[1]).ConfigureAwait(false);
+						return await Response2FAConfirm(steamID, args[1], true).ConfigureAwait(false);
 					case "!addlicense":
 						if (args.Length > 2) {
 							return await ResponseAddLicense(steamID, args[1], args[2]).ConfigureAwait(false);
@@ -358,9 +378,9 @@ namespace ArchiSteamFarm {
 						}
 					case "!redeem":
 						if (args.Length > 2) {
-							return await ResponseRedeem(steamID, args[1], args[2], false).ConfigureAwait(false);
+							return await ResponseRedeem(steamID, args[1], args[2].Replace(",", Environment.NewLine), false).ConfigureAwait(false);
 						} else {
-							return await ResponseRedeem(steamID, BotName, args[1], false).ConfigureAwait(false);
+							return await ResponseRedeem(steamID, BotName, args[1].Replace(",", Environment.NewLine), false).ConfigureAwait(false);
 						}
 					case "!start":
 						return await ResponseStart(steamID, args[1]).ConfigureAwait(false);
@@ -432,7 +452,9 @@ namespace ArchiSteamFarm {
 			// But here we're dealing with WinAuth authenticator
 			Logging.LogGenericInfo("ASF requires a few more steps to complete authenticator import...", BotName);
 
-			InitializeLoginAndPassword();
+			if (!InitializeLoginAndPassword()) {
+				return;
+			}
 
 			UserLogin userLogin = new UserLogin(BotConfig.SteamLogin, BotConfig.SteamPassword);
 			LoginResult loginResult;
@@ -440,6 +462,9 @@ namespace ArchiSteamFarm {
 				switch (loginResult) {
 					case LoginResult.Need2FA:
 						userLogin.TwoFactorCode = Program.GetUserInput(Program.EUserInputType.TwoFactorAuthentication, BotName);
+						if (string.IsNullOrEmpty(userLogin.TwoFactorCode)) {
+							return;
+						}
 						break;
 					default:
 						Logging.LogGenericError("Unhandled situation: " + loginResult, BotName);
@@ -560,7 +585,7 @@ namespace ArchiSteamFarm {
 			}
 
 			if (await ArchiWebHandler.SendTradeOffer(inventory, BotConfig.SteamMasterID, BotConfig.SteamTradeToken).ConfigureAwait(false)) {
-				await AcceptConfirmations(Confirmation.ConfirmationType.Trade).ConfigureAwait(false);
+				await AcceptConfirmations(true, Confirmation.ConfirmationType.Trade).ConfigureAwait(false);
 				return "Trade offer sent successfully!";
 			} else {
 				return "Trade offer failed due to error!";
@@ -635,7 +660,7 @@ namespace ArchiSteamFarm {
 			return bot.Response2FAOff(steamID);
 		}
 
-		private async Task<string> Response2FAOK(ulong steamID) {
+		private async Task<string> Response2FAConfirm(ulong steamID, bool confirm) {
 			if (steamID == 0 || !IsMaster(steamID)) {
 				return null;
 			}
@@ -644,11 +669,11 @@ namespace ArchiSteamFarm {
 				return "That bot doesn't have ASF 2FA enabled!";
 			}
 
-			await AcceptConfirmations().ConfigureAwait(false);
+			await AcceptConfirmations(confirm).ConfigureAwait(false);
 			return "Done!";
 		}
 
-		private static async Task<string> Response2FAOK(ulong steamID, string botName) {
+		private static async Task<string> Response2FAConfirm(ulong steamID, string botName, bool confirm) {
 			if (steamID == 0 || string.IsNullOrEmpty(botName)) {
 				return null;
 			}
@@ -658,7 +683,7 @@ namespace ArchiSteamFarm {
 				return "Couldn't find any bot named " + botName + "!";
 			}
 
-			return await bot.Response2FAOK(steamID).ConfigureAwait(false);
+			return await bot.Response2FAConfirm(steamID, confirm).ConfigureAwait(false);
 		}
 
 		private static string ResponseExit(ulong steamID) {
@@ -670,8 +695,13 @@ namespace ArchiSteamFarm {
 				return null;
 			}
 
-			Environment.Exit(0);
-			return null;
+			// Schedule the task after some time so user can receive response
+			Task.Run(async () => {
+				await Utilities.SleepAsync(1000).ConfigureAwait(false);
+				Program.Exit();
+			}).Forget();
+
+			return "Done!";
 		}
 
 		private string ResponseFarm(ulong steamID) {
@@ -727,105 +757,74 @@ namespace ArchiSteamFarm {
 			}
 
 			StringBuilder response = new StringBuilder();
-			using (StringReader reader = new StringReader(message)) {
+			using (StringReader reader = new StringReader(message))
+			using (IEnumerator<Bot> iterator = Bots.Values.GetEnumerator()) {
 				string key = reader.ReadLine();
-				IEnumerator<Bot> iterator = Bots.Values.GetEnumerator();
 				Bot currentBot = this;
-				while (key != null) {
-					if (currentBot == null) {
-						break;
-					}
-
+				while (!string.IsNullOrEmpty(key) && currentBot != null) {
 					if (validate && !IsValidCdKey(key)) {
-						key = reader.ReadLine();
-						continue;
+						key = reader.ReadLine(); // Next key
+						continue; // Without changing the bot
 					}
 
-					ArchiHandler.PurchaseResponseCallback result;
-					try {
-						result = await currentBot.ArchiHandler.RedeemKey(key).ConfigureAwait(false);
-					} catch (Exception e) {
-						Logging.LogGenericException(e, currentBot.BotName);
-						break;
-					}
+					if (currentBot.SteamClient.IsConnected) {
+						ArchiHandler.PurchaseResponseCallback result = await currentBot.ArchiHandler.RedeemKey(key).ConfigureAwait(false);
+						if (result != null) {
+							switch (result.PurchaseResult) {
+								case ArchiHandler.PurchaseResponseCallback.EPurchaseResult.DuplicatedKey:
+								case ArchiHandler.PurchaseResponseCallback.EPurchaseResult.InvalidKey:
+								case ArchiHandler.PurchaseResponseCallback.EPurchaseResult.OK:
+									response.Append(Environment.NewLine + "<" + currentBot.BotName + "> Key: " + key + " | Status: " + result.PurchaseResult + " | Items: " + string.Join("", result.Items));
 
-					if (result == null) {
-						break;
-					}
-
-					var purchaseResult = result.PurchaseResult;
-					var items = result.Items;
-
-					switch (purchaseResult) {
+									key = reader.ReadLine(); // Next key
+									break; // Next bot (if needed)
 								case ArchiHandler.PurchaseResponseCallback.EPurchaseResult.AlreadyOwned:
 								case ArchiHandler.PurchaseResponseCallback.EPurchaseResult.BaseGameRequired:
 								case ArchiHandler.PurchaseResponseCallback.EPurchaseResult.OnCooldown:
 								case ArchiHandler.PurchaseResponseCallback.EPurchaseResult.RegionLocked:
-							response.Append(Environment.NewLine + "<" + currentBot.BotName + "> Key: " + key + " | Status: " + purchaseResult + " | Items: " + string.Join("", items));
+									response.Append(Environment.NewLine + "<" + currentBot.BotName + "> Key: " + key + " | Status: " + result.PurchaseResult + " | Items: " + string.Join("", result.Items));
+
+									if (!BotConfig.ForwardKeysToOtherBots) {
+										key = reader.ReadLine(); // Next key
+										break; // Next bot (if needed)
+									}
+
 									if (BotConfig.DistributeKeys) {
-								do {
-									if (iterator.MoveNext()) {
-										currentBot = iterator.Current;
-									} else {
-										currentBot = null;
-									}
-								} while (currentBot == this);
-
-								if (!BotConfig.ForwardKeysToOtherBots) {
-									key = reader.ReadLine();
-								}
-								break;
-							}
-
-							if (!BotConfig.ForwardKeysToOtherBots) {
-								key = reader.ReadLine();
-								break;
+										break; // Next bot, without changing key
 									}
 
 									bool alreadyHandled = false;
 									foreach (Bot bot in Bots.Values) {
-								if (alreadyHandled) {
-									break;
-								}
-
-								if (bot == this) {
+										if (bot == this || !bot.SteamClient.IsConnected) {
 											continue;
 										}
 
-								ArchiHandler.PurchaseResponseCallback otherResult;
-								try {
-									otherResult = await bot.ArchiHandler.RedeemKey(key).ConfigureAwait(false);
-								} catch (Exception e) {
-									Logging.LogGenericException(e, bot.BotName);
-									break; // We're done with this key
-								}
-
+										ArchiHandler.PurchaseResponseCallback otherResult = await bot.ArchiHandler.RedeemKey(key).ConfigureAwait(false);
 										if (otherResult == null) {
-									break; // We're done with this key
+											continue;
 										}
 
-								var otherPurchaseResult = otherResult.PurchaseResult;
-								var otherItems = otherResult.Items;
-
-								switch (otherPurchaseResult) {
-									case ArchiHandler.PurchaseResponseCallback.EPurchaseResult.OK:
-										alreadyHandled = true; // We're done with this key
-										response.Append(Environment.NewLine + "<" + bot.BotName + "> Key: " + key + " | Status: " + otherPurchaseResult + " | Items: " + string.Join("", otherItems));
-										break;
+										switch (otherResult.PurchaseResult) {
 											case ArchiHandler.PurchaseResponseCallback.EPurchaseResult.DuplicatedKey:
 											case ArchiHandler.PurchaseResponseCallback.EPurchaseResult.InvalidKey:
-										alreadyHandled = true; // This key doesn't work, don't try to redeem it anymore
-										response.Append(Environment.NewLine + "<" + bot.BotName + "> Key: " + key + " | Status: " + otherPurchaseResult + " | Items: " + string.Join("", otherItems));
-										break;
-									default:
-										response.Append(Environment.NewLine + "<" + bot.BotName + "> Key: " + key + " | Status: " + otherPurchaseResult + " | Items: " + string.Join("", otherItems));
-										break;
-								}
-							}
-							key = reader.ReadLine();
-							break;
 											case ArchiHandler.PurchaseResponseCallback.EPurchaseResult.OK:
-							response.Append(Environment.NewLine + "<" + currentBot.BotName + "> Key: " + key + " | Status: " + purchaseResult + " | Items: " + string.Join("", items));
+												alreadyHandled = true; // This key is already handled, as we either redeemed it or we're sure it's dupe/invalid
+												break;
+										}
+
+										response.Append(Environment.NewLine + "<" + bot.BotName + "> Key: " + key + " | Status: " + otherResult.PurchaseResult + " | Items: " + string.Join("", otherResult.Items));
+
+										if (alreadyHandled) {
+											break;
+										}
+									}
+
+									key = reader.ReadLine(); // Next key
+									break; // Next bot (if needed)
+							}
+						}
+					}
+
 					if (BotConfig.DistributeKeys) {
 						do {
 							if (iterator.MoveNext()) {
@@ -833,24 +832,7 @@ namespace ArchiSteamFarm {
 							} else {
 								currentBot = null;
 							}
-								} while (currentBot == this);
-							}
-							key = reader.ReadLine();
-							break;
-						case ArchiHandler.PurchaseResponseCallback.EPurchaseResult.DuplicatedKey:
-						case ArchiHandler.PurchaseResponseCallback.EPurchaseResult.InvalidKey:
-							response.Append(Environment.NewLine + "<" + currentBot.BotName + "> Key: " + key + " | Status: " + purchaseResult + " | Items: " + string.Join("", items));
-							if (BotConfig.DistributeKeys && !BotConfig.ForwardKeysToOtherBots) {
-								do {
-									if (iterator.MoveNext()) {
-										currentBot = iterator.Current;
-									} else {
-										currentBot = null;
-									}
-								} while (currentBot == this);
-							}
-							key = reader.ReadLine();
-							break;
+						} while (currentBot == this || (currentBot != null && !currentBot.SteamClient.IsConnected));
 					}
 				}
 			}
@@ -900,8 +882,13 @@ namespace ArchiSteamFarm {
 				return null;
 			}
 
+			// Schedule the task after some time so user can receive response
+			Task.Run(async () => {
+				await Utilities.SleepAsync(1000).ConfigureAwait(false);
 				Program.Restart();
-			return null;
+			}).Forget();
+
+			return "Done!";
 		}
 
 		private async Task<string> ResponseAddLicense(ulong steamID, HashSet<uint> gameIDs) {
@@ -911,11 +898,8 @@ namespace ArchiSteamFarm {
 
 			StringBuilder result = new StringBuilder();
 			foreach (uint gameID in gameIDs) {
-				SteamApps.FreeLicenseCallback callback;
-				try {
-					callback = await SteamApps.RequestFreeLicense(gameID);
-				} catch (Exception e) {
-					Logging.LogGenericException(e, BotName);
+				SteamApps.FreeLicenseCallback callback = await SteamApps.RequestFreeLicense(gameID);
+				if (callback == null) {
 					continue;
 				}
 
@@ -1129,7 +1113,11 @@ namespace ArchiSteamFarm {
 		private void HandleCallbacks() {
 			TimeSpan timeSpan = TimeSpan.FromMilliseconds(CallbackSleep);
 			while (KeepRunning || SteamClient.IsConnected) {
+				try {
 					CallbackManager.RunWaitCallbacks(timeSpan);
+				} catch (Exception e) {
+					Logging.LogGenericException(e, BotName);
+				}
 			}
 		}
 
@@ -1160,7 +1148,9 @@ namespace ArchiSteamFarm {
 
 			Logging.LogGenericInfo("Linking new ASF MobileAuthenticator...", BotName);
 
-			InitializeLoginAndPassword();
+			if (!InitializeLoginAndPassword()) {
+				return;
+			}
 
 			UserLogin userLogin = new UserLogin(BotConfig.SteamLogin, BotConfig.SteamPassword);
 			LoginResult loginResult;
@@ -1168,6 +1158,9 @@ namespace ArchiSteamFarm {
 				switch (loginResult) {
 					case LoginResult.NeedEmail:
 						userLogin.EmailCode = Program.GetUserInput(Program.EUserInputType.SteamGuard, BotName);
+						if (string.IsNullOrEmpty(userLogin.EmailCode)) {
+							return;
+						}
 						break;
 					default:
 						Logging.LogGenericError("Unhandled situation: " + loginResult, BotName);
@@ -1182,6 +1175,9 @@ namespace ArchiSteamFarm {
 				switch (linkResult) {
 					case AuthenticatorLinker.LinkResult.MustProvidePhoneNumber:
 						authenticatorLinker.PhoneNumber = Program.GetUserInput(Program.EUserInputType.PhoneNumber, BotName);
+						if (string.IsNullOrEmpty(authenticatorLinker.PhoneNumber)) {
+							return;
+						}
 						break;
 					default:
 						Logging.LogGenericError("Unhandled situation: " + linkResult, BotName);
@@ -1191,13 +1187,21 @@ namespace ArchiSteamFarm {
 
 			BotDatabase.SteamGuardAccount = authenticatorLinker.LinkedAccount;
 
-			AuthenticatorLinker.FinalizeResult finalizeResult = authenticatorLinker.FinalizeAddAuthenticator(Program.GetUserInput(Program.EUserInputType.SMS, BotName));
+			string sms = Program.GetUserInput(Program.EUserInputType.SMS, BotName);
+			if (string.IsNullOrEmpty(sms)) {
+				return;
+			}
+
+			AuthenticatorLinker.FinalizeResult finalizeResult = authenticatorLinker.FinalizeAddAuthenticator(sms);
 			if (finalizeResult != AuthenticatorLinker.FinalizeResult.Success) {
 				Logging.LogGenericError("Unhandled situation: " + finalizeResult, BotName);
 				DelinkMobileAuthenticator();
 				return;
 			}
 
+			// Ensure that we also save changes made by finalization step (if any)
+			BotDatabase.Save();
+
 			Logging.LogGenericInfo("Successfully linked ASF as new mobile authenticator for this account!", BotName);
 			Program.GetUserInput(Program.EUserInputType.RevocationCode, BotName, BotDatabase.SteamGuardAccount.RevocationCode);
 		}
@@ -1224,16 +1228,24 @@ namespace ArchiSteamFarm {
 			SteamFriends.JoinChat(BotConfig.SteamMasterClanID);
 		}
 
-		private void InitializeLoginAndPassword() {
+		private bool InitializeLoginAndPassword() {
 			if (string.IsNullOrEmpty(BotConfig.SteamLogin)) {
 				BotConfig.SteamLogin = Program.GetUserInput(Program.EUserInputType.Login, BotName);
+				if (string.IsNullOrEmpty(BotConfig.SteamLogin)) {
+					return false;
+				}
 			}
 
 			if (string.IsNullOrEmpty(BotConfig.SteamPassword) && string.IsNullOrEmpty(BotDatabase.LoginKey)) {
 				BotConfig.SteamPassword = Program.GetUserInput(Program.EUserInputType.Password, BotName);
+				if (string.IsNullOrEmpty(BotConfig.SteamPassword)) {
+					return false;
 				}
 			}
 
+			return true;
+		}
+
 		private void OnConnected(SteamClient.ConnectedCallback callback) {
 			if (callback == null) {
 				return;
@@ -1262,7 +1274,10 @@ namespace ArchiSteamFarm {
 				}
 			}
 
-			InitializeLoginAndPassword();
+			if (!InitializeLoginAndPassword()) {
+				Stop();
+				return;
+			}
 
 			Logging.LogGenericInfo("Logging in...", BotName);
 
@@ -1300,7 +1315,6 @@ namespace ArchiSteamFarm {
 			}
 
 			Logging.LogGenericInfo("Disconnected from Steam!", BotName);
-			ArchiWebHandler.OnDisconnected();
 			CardsFarmer.StopFarming().Forget();
 
 			// If we initiated disconnect, do not attempt to reconnect
@@ -1354,15 +1368,6 @@ namespace ArchiSteamFarm {
 				return;
 			}
 
-			for (byte i = 0; i < WebBrowser.MaxRetries && !ArchiWebHandler.IsInitialized; i++) {
-				await Utilities.SleepAsync(1000).ConfigureAwait(false);
-			}
-
-			if (!ArchiWebHandler.IsInitialized) {
-				Logging.LogGenericWarning("Reached timeout while waiting for ArchiWebHandler to initialize!");
-				return;
-			}
-
 			bool acceptedSomething = false;
 			foreach (KeyValue guestPass in callback.GuestPasses) {
 				ulong gid = guestPass["gid"].AsUnsignedLong();
@@ -1500,10 +1505,18 @@ namespace ArchiSteamFarm {
 			switch (callback.Result) {
 				case EResult.AccountLogonDenied:
 					AuthCode = Program.GetUserInput(Program.EUserInputType.SteamGuard, BotName);
+					if (string.IsNullOrEmpty(AuthCode)) {
+						Stop();
+						return;
+					}
 					break;
 				case EResult.AccountLoginDeniedNeedTwoFactor:
 					if (BotDatabase.SteamGuardAccount == null) {
 						TwoFactorAuth = Program.GetUserInput(Program.EUserInputType.TwoFactorAuthentication, BotName);
+						if (string.IsNullOrEmpty(TwoFactorAuth)) {
+							Stop();
+							return;
+						}
 					} else {
 						TwoFactorAuth = BotDatabase.SteamGuardAccount.GenerateSteamGuardCode();
 					}
@@ -1536,12 +1549,17 @@ namespace ArchiSteamFarm {
 
 					if (string.IsNullOrEmpty(BotConfig.SteamParentalPIN)) {
 						BotConfig.SteamParentalPIN = Program.GetUserInput(Program.EUserInputType.SteamParentalPIN, BotName);
+						if (string.IsNullOrEmpty(BotConfig.SteamParentalPIN)) {
+							Stop();
+							return;
+						}
 					}
 
-					if (!await ArchiWebHandler.Init(SteamClient, callback.WebAPIUserNonce, BotConfig.SteamParentalPIN).ConfigureAwait(false)) {
-						await RestartIfRunning().ConfigureAwait(false);
+					if (!ArchiWebHandler.Init(SteamClient, callback.WebAPIUserNonce, BotConfig.SteamParentalPIN)) {
+						if (!await RefreshSession().ConfigureAwait(false)) {
 							return;
 						}
+					}
 
 					if (BotConfig.DismissInventoryNotifications) {
 						ArchiWebHandler.MarkInventory().Forget();
@@ -1592,7 +1610,6 @@ namespace ArchiSteamFarm {
 				return;
 			}
 
-			try {
 			int fileSize;
 			byte[] sentryHash;
 
@@ -1617,10 +1634,13 @@ namespace ArchiSteamFarm {
 				Result = EResult.OK,
 				LastError = 0,
 				OneTimePassword = callback.OneTimePassword,
-					SentryFileHash = sentryHash,
+				SentryFileHash = sentryHash
 			});
-			} catch (Exception e) {
-				Logging.LogGenericException(e, BotName);
+		}
+
+		private void OnWebAPIUserNonce(SteamUser.WebAPIUserNonceCallback callback) {
+			if (callback == null) {
+				return;
 			}
 		}
 

ArchiSteamFarm/BotConfig.cs

@@ -99,14 +99,14 @@ namespace ArchiSteamFarm {
 		internal HashSet<uint> GamesPlayedWhileIdle { get; private set; } = new HashSet<uint>() { 0 };
 
 
-		internal static BotConfig Load(string path) {
-			if (string.IsNullOrEmpty(path) || !File.Exists(path)) {
+		internal static BotConfig Load(string filePath) {
+			if (string.IsNullOrEmpty(filePath) || !File.Exists(filePath)) {
 				return null;
 			}
 
 			BotConfig botConfig;
 			try {
-				botConfig = JsonConvert.DeserializeObject<BotConfig>(File.ReadAllText(path));
+				botConfig = JsonConvert.DeserializeObject<BotConfig>(File.ReadAllText(filePath));
 			} catch (Exception e) {
 				Logging.LogGenericException(e);
 				return null;

ArchiSteamFarm/CardsFarmer.cs

@@ -53,7 +53,7 @@ namespace ArchiSteamFarm {
 
 			Bot = bot;
 
-			if (Program.GlobalConfig.IdleFarmingPeriod > 0) {
+			if (Timer == null && Program.GlobalConfig.IdleFarmingPeriod > 0) {
 				Timer = new Timer(
 					async e => await CheckGamesForFarming().ConfigureAwait(false),
 					null,
@@ -211,10 +211,6 @@ namespace ArchiSteamFarm {
 				return true;
 			}
 
-			if (await Bot.ArchiWebHandler.ReconnectIfNeeded().ConfigureAwait(false)) {
-				return false;
-			}
-
 			Logging.LogGenericInfo("Checking badges...", Bot.BotName);
 
 			// Find the number of badge pages
@@ -229,10 +225,13 @@ namespace ArchiSteamFarm {
 			HtmlNodeCollection htmlNodeCollection = htmlDocument.DocumentNode.SelectNodes("//a[@class='pagelink']");
 			if (htmlNodeCollection != null && htmlNodeCollection.Count > 0) {
 				HtmlNode htmlNode = htmlNodeCollection[htmlNodeCollection.Count - 1];
-				if (!byte.TryParse(htmlNode.InnerText, out maxPages)) {
+				string lastPage = htmlNode.InnerText;
+				if (!string.IsNullOrEmpty(lastPage)) {
+					if (!byte.TryParse(lastPage, out maxPages)) {
 						maxPages = 1; // Should never happen
 					}
 				}
+			}
 
 			GamesToFarm.Clear();
 
@@ -242,17 +241,13 @@ namespace ArchiSteamFarm {
 				Logging.LogGenericInfo("Checking other pages...", Bot.BotName);
 				List<Task> tasks = new List<Task>(maxPages - 1);
 				for (byte page = 2; page <= maxPages; page++) {
-					byte currentPage = page; // We need a copy of variable being passed when in for loops
+					byte currentPage = page; // We need a copy of variable being passed when in for loops, as loop will proceed before task is launched
 					tasks.Add(CheckPage(currentPage));
 				}
 				await Task.WhenAll(tasks).ConfigureAwait(false);
 			}
 
-			if (GamesToFarm.Count == 0) {
-				return false;
-			}
-
-			return true;
+			return GamesToFarm.Count > 0;
 		}
 
 		private void CheckPage(HtmlDocument htmlDocument) {
@@ -362,7 +357,6 @@ namespace ArchiSteamFarm {
 
 			HtmlNode htmlNode = htmlDocument.DocumentNode.SelectSingleNode("//span[@class='progress_info_bold']");
 			if (htmlNode == null) {
-				await Bot.ArchiWebHandler.ReconnectIfNeeded().ConfigureAwait(false);
 				return null;
 			}
 

ArchiSteamFarm/GlobalConfig.cs

@@ -36,9 +36,10 @@ namespace ArchiSteamFarm {
 			Experimental
 		}
 
+		internal const byte DefaultHttpTimeout = 60;
+
 		private const byte DefaultMaxFarmingTime = 10;
 		private const byte DefaultFarmingDelay = 5;
-		private const byte DefaultHttpTimeout = 60;
 		private const ushort DefaultWCFPort = 1242;
 		private const ProtocolType DefaultSteamProtocol = ProtocolType.Tcp;
 
@@ -48,6 +49,9 @@ namespace ArchiSteamFarm {
 		[JsonProperty(Required = Required.DisallowNull)]
 		internal bool Debug { get; private set; } = false;
 
+		[JsonProperty(Required = Required.DisallowNull)]
+		internal bool Headless { get; private set; } = false;
+
 		[JsonProperty(Required = Required.DisallowNull)]
 		internal bool AutoUpdates { get; private set; } = true;
 
@@ -117,6 +121,10 @@ namespace ArchiSteamFarm {
 				return null;
 			}
 
+			if (globalConfig == null) {
+				return null;
+			}
+
 			// SK2 supports only TCP and UDP steam protocols
 			// Ensure that user can't screw this up
 			switch (globalConfig.SteamProtocol) {

ArchiSteamFarm/Program.cs

@@ -247,10 +247,15 @@ namespace ArchiSteamFarm {
 			Restart();
 		}
 
+		internal static void Exit(int exitCode = 0) {
+			WCF.StopServer();
+			Environment.Exit(exitCode);
+		}
+
 		internal static void Restart() {
 			try {
 				Process.Start(ExecutableFile, string.Join(" ", Environment.GetCommandLineArgs().Skip(1)));
-				Environment.Exit(0);
+				Exit();
 			} catch (Exception e) {
 				Logging.LogGenericException(e);
 			}
@@ -269,6 +274,11 @@ namespace ArchiSteamFarm {
 				return null;
 			}
 
+			if (GlobalConfig.Headless) {
+				Logging.LogGenericWarning("Received a request for user input, but process is running in headless mode!");
+				return null;
+			}
+
 			string result;
 			lock (ConsoleLock) {
 				ConsoleIsBusy = true;
@@ -337,14 +347,14 @@ namespace ArchiSteamFarm {
 			if (GlobalConfig == null) {
 				Logging.LogGenericError("Global config could not be loaded, please make sure that ASF.json exists and is valid!");
 				Thread.Sleep(5000);
-				Environment.Exit(1);
+				Exit(1);
 			}
 
 			GlobalDatabase = GlobalDatabase.Load();
 			if (GlobalDatabase == null) {
 				Logging.LogGenericError("Global database could not be loaded!");
 				Thread.Sleep(5000);
-				Environment.Exit(1);
+				Exit(1);
 			}
 
 			ArchiWebHandler.Init();
@@ -445,7 +455,7 @@ namespace ArchiSteamFarm {
 
 			// If we ran ASF as a client, we're done by now
 			if (Mode == EMode.Client) {
-				Environment.Exit(0);
+				Exit();
 			}
 
 			// From now on it's server mode
@@ -454,7 +464,7 @@ namespace ArchiSteamFarm {
 			if (!Directory.Exists(ConfigDirectory)) {
 				Logging.LogGenericError("Config directory doesn't exist!");
 				Thread.Sleep(5000);
-				Environment.Exit(1);
+				Exit(1);
 			}
 
 			CheckForUpdate().Wait();
@@ -494,7 +504,7 @@ namespace ArchiSteamFarm {
 			ShutdownResetEvent.WaitOne();
 
 			// We got a signal to shutdown
-			Environment.Exit(0);
+			Exit();
 		}
 	}
 }

ArchiSteamFarm/Properties/AssemblyInfo.cs

@@ -32,5 +32,5 @@ using System.Runtime.InteropServices;
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("2.0.2.1")]
-[assembly: AssemblyFileVersion("2.0.2.1")]
+[assembly: AssemblyVersion("2.0.2.5")]
+[assembly: AssemblyFileVersion("2.0.2.5")]

ArchiSteamFarm/Trading.cs

@@ -84,19 +84,12 @@ namespace ArchiSteamFarm {
 				return;
 			}
 
-			List<Task> tasks = new List<Task>();
-			foreach (Steam.TradeOffer tradeOffer in tradeOffers) {
-				if (tradeOffer.trade_offer_state == Steam.TradeOffer.ETradeOfferState.Active) {
-					tasks.Add(Task.Run(async () => await ParseTrade(tradeOffer).ConfigureAwait(false)));
-				}
-			}
-
-			await Task.WhenAll(tasks).ConfigureAwait(false);
-			await Bot.AcceptConfirmations(Confirmation.ConfirmationType.Trade).ConfigureAwait(false);
+			await tradeOffers.ForEachAsync(ParseTrade).ConfigureAwait(false);
+			await Bot.AcceptConfirmations(true, Confirmation.ConfirmationType.Trade).ConfigureAwait(false);
 		}
 
 		private async Task ParseTrade(Steam.TradeOffer tradeOffer) {
-			if (tradeOffer == null) {
+			if (tradeOffer == null || tradeOffer.trade_offer_state != Steam.TradeOffer.ETradeOfferState.Active) {
 				return;
 			}
 
@@ -105,12 +98,33 @@ namespace ArchiSteamFarm {
 				return;
 			}
 
-			if (tradeOffer.items_to_give.Count == 0 || tradeOffer.OtherSteamID64 == Bot.BotConfig.SteamMasterID) {
+			if (ShouldAcceptTrade(tradeOffer)) {
 				Logging.LogGenericInfo("Accepting trade: " + tradeID, Bot.BotName);
 				await Bot.ArchiWebHandler.AcceptTradeOffer(tradeID).ConfigureAwait(false);
 			} else {
 				Logging.LogGenericInfo("Ignoring trade: " + tradeID, Bot.BotName);
 			}
 		}
+
+		private bool ShouldAcceptTrade(Steam.TradeOffer tradeOffer) {
+			if (tradeOffer == null) {
+				return false;
+			}
+
+			// Always accept trades when we're not losing anything
+			if (tradeOffer.items_to_give.Count == 0) {
+				return true;
+			}
+
+			// Always accept trades from SteamMasterID
+			if (tradeOffer.OtherSteamID64 != 0 && tradeOffer.OtherSteamID64 == Bot.BotConfig.SteamMasterID) {
+				return true;
+			}
+
+			// TODO: Add optional SteamTradeMatcher integration here
+
+			// If no rule above matched this trade, reject it
+			return false;
+		}
 	}
 }

ArchiSteamFarm/Utilities.cs

@@ -22,14 +22,25 @@
 
 */
 
+using System;
+using System.Collections.Generic;
+using System.Linq;
 using System.Threading.Tasks;
 
 namespace ArchiSteamFarm {
 	internal static class Utilities {
 		internal static void Forget(this Task task) { }
 
-		internal static async Task SleepAsync(int miliseconds) {
-			await Task.Delay(miliseconds).ConfigureAwait(false);
+		internal static Task ForEachAsync<T>(this IEnumerable<T> sequence, Func<T, Task> action) {
+			return Task.WhenAll(sequence.Select(action));
+		}
+
+		internal static Task SleepAsync(int miliseconds) {
+			if (miliseconds < 0) {
+				return Task.FromResult(true);
+			}
+
+			return Task.Delay(miliseconds);
 		}
 
 		internal static uint GetCharCountInString(string s, char c) {

ArchiSteamFarm/WCF.cs

@@ -44,6 +44,9 @@ namespace ArchiSteamFarm {
 		internal static void Init() {
 			if (string.IsNullOrEmpty(Program.GlobalConfig.WCFHostname)) {
 				Program.GlobalConfig.WCFHostname = Program.GetUserInput(Program.EUserInputType.WCFHostname);
+				if (string.IsNullOrEmpty(Program.GlobalConfig.WCFHostname)) {
+					return;
+				}
 			}
 
 			URL = "http://" + Program.GlobalConfig.WCFHostname + ":" + Program.GlobalConfig.WCFPort + "/ASF";

ArchiSteamFarm/WebBrowser.cs

@@ -184,6 +184,10 @@ namespace ArchiSteamFarm {
 				return null;
 			}
 
+			if (request.StartsWith("https://") && Program.GlobalConfig.ForceHttp) {
+				return null;
+			}
+
 			HttpResponseMessage responseMessage;
 			using (HttpRequestMessage requestMessage = new HttpRequestMessage(httpMethod, request)) {
 				if (data != null && data.Count > 0) {
@@ -220,7 +224,7 @@ namespace ArchiSteamFarm {
 
 			if (!responseMessage.IsSuccessStatusCode) {
 				if (Debugging.IsDebugBuild || Program.GlobalConfig.Debug) {
-					Logging.LogGenericError("Request: " + request + "failed!");
+					Logging.LogGenericError("Request: " + request + " failed!");
 					Logging.LogGenericError("Status code: " + responseMessage.StatusCode);
 					Logging.LogGenericError("Content: " + Environment.NewLine + await responseMessage.Content.ReadAsStringAsync().ConfigureAwait(false));
 				}

ArchiSteamFarm/config/ASF.json

@@ -1,5 +1,6 @@
 {
   "Debug": false,
+  "Headless": false,
   "AutoUpdates": true,
   "UpdateChannel": 1,
   "SteamProtocol": 6,

ConfigGenerator/ASFConfig.cs

@@ -54,9 +54,9 @@ namespace ConfigGenerator {
 		internal virtual void Remove() {
 			string queryPath = Path.GetFileNameWithoutExtension(FilePath);
 			lock (FilePath) {
-				foreach (var configFile in Directory.EnumerateFiles(Program.ConfigDirectory, queryPath + ".*")) {
+				foreach (string botFile in Directory.EnumerateFiles(Program.ConfigDirectory, queryPath + ".*")) {
 					try {
-						File.Delete(configFile);
+						File.Delete(botFile);
 					} catch (Exception e) {
 						Logging.LogGenericException(e);
 					}
@@ -72,9 +72,9 @@ namespace ConfigGenerator {
 
 			string queryPath = Path.GetFileNameWithoutExtension(FilePath);
 			lock (FilePath) {
-				foreach (var file in Directory.EnumerateFiles(Program.ConfigDirectory, queryPath + ".*")) {
+				foreach (string botFile in Directory.EnumerateFiles(Program.ConfigDirectory, queryPath + ".*")) {
 					try {
-						File.Move(file, Path.Combine(Program.ConfigDirectory, botName + Path.GetExtension(file)));
+						File.Move(botFile, Path.Combine(Program.ConfigDirectory, botName + Path.GetExtension(botFile)));
 					} catch (Exception e) {
 						Logging.LogGenericException(e);
 					}

ConfigGenerator/BotConfig.cs

@@ -98,7 +98,6 @@ namespace ConfigGenerator {
 		[JsonProperty(Required = Required.DisallowNull)]
 		public List<uint> GamesPlayedWhileIdle { get; set; } = new List<uint>();
 
-
 		internal static BotConfig Load(string filePath) {
 			if (string.IsNullOrEmpty(filePath)) {
 				return null;
@@ -116,6 +115,10 @@ namespace ConfigGenerator {
 				return new BotConfig(filePath);
 			}
 
+			if (botConfig == null) {
+				return new BotConfig(filePath);
+			}
+
 			botConfig.FilePath = filePath;
 
 			return botConfig;

ConfigGenerator/GlobalConfig.cs

@@ -48,6 +48,9 @@ namespace ConfigGenerator {
 		[JsonProperty(Required = Required.DisallowNull)]
 		public bool Debug { get; set; } = false;
 
+		[JsonProperty(Required = Required.DisallowNull)]
+		public bool Headless { get; set; } = false;
+
 		[JsonProperty(Required = Required.DisallowNull)]
 		public bool AutoUpdates { get; set; } = true;
 
@@ -120,6 +123,10 @@ namespace ConfigGenerator {
 				return new GlobalConfig(filePath);
 			}
 
+			if (globalConfig == null) {
+				return new GlobalConfig(filePath);
+			}
+
 			globalConfig.FilePath = filePath;
 
 			// SK2 supports only TCP and UDP steam protocols

cc.sh

@@ -0,0 +1,66 @@
+#!/bin/bash
+set -eu
+
+BUILD="Release"
+CLEAN=0
+
+MONO_ARGS=("--aot" "--llvm" "--server" "-O=all")
+XBUILD_ARGS=("/nologo")
+BINARIES=("ArchiSteamFarm/bin/Release/ArchiSteamFarm.exe")
+SOLUTION="ArchiSteamFarm.sln"
+
+PRINT_USAGE() {
+	echo "Usage: $0 [--clean] [debug/release]"
+	exit 1
+}
+
+for ARG in "$@"; do
+	case "$ARG" in
+		release|Release) BUILD="Release" ;;
+		debug|Debug) BUILD="Debug" ;;
+		--clean) CLEAN=1 ;;
+		*) PRINT_USAGE
+	esac
+done
+
+XBUILD_ARGS+=("/p:Configuration=$BUILD")
+
+cd "$(dirname "$(readlink -f "$0")")"
+
+if [[ -d ".git" ]] && hash git &>/dev/null; then
+	git pull
+fi
+
+if [[ ! -f "$SOLUTION" ]]; then
+	echo "ERROR: $SOLUTION could not be found!"
+	exit 1
+fi
+
+if hash nuget &>/dev/null; then
+	nuget restore "$SOLUTION"
+fi
+
+if [[ "$CLEAN" -eq 1 ]]; then
+	rm -rf out
+	xbuild "${XBUILD_ARGS[@]}" "/t:Clean" "$SOLUTION"
+fi
+
+xbuild "${XBUILD_ARGS[@]}" "$SOLUTION"
+
+if [[ ! -f "${BINARIES[0]}" ]]; then
+	echo "ERROR: ${BINARIES[0]} binary could not be found!"
+fi
+
+# If it's release build, use Mono AOT for output binaries
+if [[ "$BUILD" = "Release" ]]; then
+	for BINARY in "${BINARIES[@]}"; do
+		if [[ ! -f "$BINARY" ]]; then
+			continue
+		fi
+
+		mono "${MONO_ARGS[@]}" "$BINARY"
+	done
+fi
+
+echo
+echo "Compilation finished successfully! :)"

run.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+set -eu
+
+BUILD="Release"
+
+MONO_ARGS=("--llvm" "--server" "-O=all")
+
+PRINT_USAGE() {
+	echo "Usage: $0 [debug/release]"
+	exit 1
+}
+
+for ARG in "$@"; do
+	case "$ARG" in
+		release|Release) BUILD="Release" ;;
+		debug|Debug) BUILD="Debug" ;;
+		*) PRINT_USAGE
+	esac
+done
+
+BINARY="ArchiSteamFarm/bin/$BUILD/ArchiSteamFarm.exe"
+
+if [[ ! -f "$BINARY" ]]; then
+	echo "ERROR: $BINARY could not be found!"
+	exit 1
+fi
+
+mono "${MONO_ARGS[@]}" "$BINARY"