Let's hope this is the last one

ArchiSteamFarm/ArchiWebHandler.cs

@@ -47,6 +47,8 @@ namespace ArchiSteamFarm {
 		private readonly SemaphoreSlim SessionSemaphore = new SemaphoreSlim(1);
 		private readonly WebBrowser WebBrowser;
 
+		internal bool Ready { get; private set; }
+
 		private ulong SteamID;
 		private DateTime LastSessionRefreshCheck = DateTime.MinValue;
 
@@ -117,7 +119,9 @@ namespace ArchiSteamFarm {
 			WebBrowser = new WebBrowser(bot.BotName);
 		}
 
-		internal bool Init(SteamClient steamClient, string webAPIUserNonce, string parentalPin) {
+		internal void OnDisconnected() => Ready = false;
+
+		internal async Task<bool> Init(SteamClient steamClient, string webAPIUserNonce, string parentalPin) {
 			if ((steamClient == null) || string.IsNullOrEmpty(webAPIUserNonce)) {
 				Logging.LogNullError(nameof(steamClient) + " || " + nameof(webAPIUserNonce), Bot.BotName);
 				return false;
@@ -179,10 +183,17 @@ namespace ArchiSteamFarm {
 			string steamLoginSecure = authResult["tokensecure"].Value;
 			WebBrowser.CookieContainer.Add(new Cookie("steamLoginSecure", steamLoginSecure, "/", "." + SteamCommunityHost));
 
-			if (!UnlockParentalAccount(parentalPin).Result) {
+			// Apparently Steam is too stupid to detect language from our headers, so we must ask for it explicitly
+			if (!await SetLanguage().ConfigureAwait(false)) {
 				return false;
 			}
 
+			// Unlock Steam Parental if needed
+			if (!await UnlockParentalAccount(parentalPin).ConfigureAwait(false)) {
+				return false;
+			}
+
+			Ready = true;
 			LastSessionRefreshCheck = DateTime.Now;
 			return true;
 		}
@@ -246,7 +257,7 @@ namespace ArchiSteamFarm {
 				return null;
 			}
 
-			string request = SteamCommunityURL + "/mobileconf/conf?p=" + deviceID + "&a=" + SteamID + "&k=" + WebUtility.UrlEncode(confirmationHash) + "&t=" + time + "&m=android&tag=conf";
+			string request = SteamCommunityURL + "/mobileconf/conf?l=english&p=" + deviceID + "&a=" + SteamID + "&k=" + WebUtility.UrlEncode(confirmationHash) + "&t=" + time + "&m=android&tag=conf";
 			return await WebBrowser.UrlGetToHtmlDocumentRetry(request).ConfigureAwait(false);
 		}
 
@@ -435,7 +446,7 @@ namespace ArchiSteamFarm {
 				return null;
 			}
 
-			string request = SteamCommunityURL + "/tradeoffer/" + tradeID;
+			string request = SteamCommunityURL + "/tradeoffer/" + tradeID + "?l=english";
 
 			HtmlDocument htmlDocument = await WebBrowser.UrlGetToHtmlDocumentRetry(request).ConfigureAwait(false);
 			if (htmlDocument == null) {
@@ -837,7 +848,7 @@ namespace ArchiSteamFarm {
 				return null;
 			}
 
-			string request = SteamCommunityURL + "/my/badges?p=" + page;
+			string request = SteamCommunityURL + "/my/badges?l=english&p=" + page;
 
 			return await WebBrowser.UrlGetToHtmlDocumentRetry(request).ConfigureAwait(false);
 		}
@@ -852,7 +863,7 @@ namespace ArchiSteamFarm {
 				return null;
 			}
 
-			string request = SteamCommunityURL + "/my/gamecards/" + appID;
+			string request = SteamCommunityURL + "/my/gamecards/" + appID + "?l=english";
 
 			return await WebBrowser.UrlGetToHtmlDocumentRetry(request).ConfigureAwait(false);
 		}
@@ -933,5 +944,21 @@ namespace ArchiSteamFarm {
 			Logging.LogGenericInfo("Success!", Bot.BotName);
 			return true;
 		}
+
+		private async Task<bool> SetLanguage() {
+			string sessionID = WebBrowser.CookieContainer.GetCookieValue(SteamCommunityURL, "sessionid");
+			if (string.IsNullOrEmpty(sessionID)) {
+				Logging.LogNullError(nameof(sessionID), Bot.BotName);
+				return false;
+			}
+
+			string request = SteamCommunityURL + "/actions/SetLanguage";
+			Dictionary<string, string> data = new Dictionary<string, string>(2) {
+				{ "sessionid", sessionID },
+				{ "language", "english" }
+			};
+
+			return await WebBrowser.UrlPostRetry(request, data).ConfigureAwait(false);
+		}
 	}
 }

ArchiSteamFarm/Bot.cs

@@ -306,7 +306,7 @@ namespace ArchiSteamFarm {
 				return false;
 			}
 
-			if (ArchiWebHandler.Init(SteamClient, callback.Nonce, BotConfig.SteamParentalPIN)) {
+			if (await ArchiWebHandler.Init(SteamClient, callback.Nonce, BotConfig.SteamParentalPIN).ConfigureAwait(false)) {
 				return true;
 			}
 
@@ -1452,6 +1452,7 @@ namespace ArchiSteamFarm {
 				return;
 			}
 
+			ArchiWebHandler.OnDisconnected();
 			Logging.LogGenericInfo("Disconnected from Steam!", BotName);
 
 			FirstTradeSent = false;
@@ -1503,6 +1504,14 @@ namespace ArchiSteamFarm {
 				return;
 			}
 
+			for (byte i = 0; (i < Program.GlobalConfig.HttpTimeout) && !ArchiWebHandler.Ready; i++) {
+				await Task.Delay(1000).ConfigureAwait(false);
+			}
+
+			if (!ArchiWebHandler.Ready) {
+				return;
+			}
+
 			bool acceptedSomething = false;
 			foreach (ulong gid in callback.GuestPasses.Select(guestPass => guestPass["gid"].AsUnsignedLong()).Where(gid => gid != 0)) {
 				Logging.LogGenericInfo("Accepting gift: " + gid + "...", BotName);
@@ -1698,7 +1707,7 @@ namespace ArchiSteamFarm {
 						}
 					}
 
-					if (!ArchiWebHandler.Init(SteamClient, callback.WebAPIUserNonce, BotConfig.SteamParentalPIN)) {
+					if (!await ArchiWebHandler.Init(SteamClient, callback.WebAPIUserNonce, BotConfig.SteamParentalPIN).ConfigureAwait(false)) {
 						if (!await RefreshSession().ConfigureAwait(false)) {
 							return;
 						}

ArchiSteamFarm/CardsFarmer.cs

@@ -389,7 +389,7 @@ namespace ArchiSteamFarm {
 			}
 
 			Logging.LogGenericInfo("Status for " + appID + ": " + progress, Bot.BotName);
-			return progress.Equals("No card drops remaining");
+			return !progress.Equals("No card drops remaining");
 		}
 
 		private bool FarmMultiple() {

ArchiSteamFarm/Properties/AssemblyInfo.cs

@@ -31,5 +31,5 @@ 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("2.1.0.2")]
-[assembly: AssemblyFileVersion("2.1.0.2")]
+[assembly: AssemblyVersion("2.1.0.4")]
+[assembly: AssemblyFileVersion("2.1.0.4")]

ArchiSteamFarm/WebBrowser.cs

@@ -80,6 +80,9 @@ namespace ArchiSteamFarm {
 
 			// Most web services expect that UserAgent is set, so we declare it globally
 			HttpClient.DefaultRequestHeaders.UserAgent.ParseAdd(DefaultUserAgent);
+
+			// We should always operate in English language, declare it globally
+			HttpClient.DefaultRequestHeaders.AcceptLanguage.ParseAdd("en-US,en;q=0.8,en-GB;q=0.6");
 		}
 
 		internal async Task<bool> UrlHeadRetry(string request, string referer = null) {