Add localization, optimization, better error handling

.gitignore

@@ -1,3 +1,5 @@
 bin/
 obj/
 .idea
+.DS_Store
+*.DotSettings.user

YandexKeyExtractor/Decryptor.cs

@@ -5,20 +5,28 @@ using NaCl;
 
 namespace YandexKeyExtractor;
 
-public static class Decryptor
+internal static class Decryptor
 {
+	private const int maxStackallocSize = 4096;
+
 	public static string? Decrypt(string encryptedText, string password)
 	{
 		var base64Text = NormalizeBase64(encryptedText);
 
-		ReadOnlySpan<byte> textBytes = Convert.FromBase64String(base64Text).AsSpan();
+		var textBytes = Convert.FromBase64String(base64Text);
 
 		const byte SaltLength = 16;
-		var textData = textBytes[..^SaltLength];
+		var textData = textBytes.AsSpan()[..^SaltLength];
-		var textSalt = textBytes[^SaltLength..];
+		var salt = textBytes[^SaltLength..];
 
 		var generatedPassword = SCrypt.ComputeDerivedKey(
-			Encoding.UTF8.GetBytes(password), textSalt.ToArray(), 32768, 20, 1, null, 32
+			Encoding.UTF8.GetBytes(password),
+			salt,
+			cost: 32768,
+			blockSize: 20,
+			parallel: 1,
+			maxThreads: null,
+			derivedKeyLength: 32
 		);
 
 		using XSalsa20Poly1305 secureBox = new(generatedPassword);
@@ -27,8 +35,9 @@ public static class Decryptor
 		var nonce = textData[..NonceLength];
 		var dataWithMac = textData[NonceLength..];
 
-
+		var message = dataWithMac.Length <= maxStackallocSize
-		var message = dataWithMac.Length <= 4096 ? stackalloc byte[dataWithMac.Length] : new byte[dataWithMac.Length];
+			? stackalloc byte[dataWithMac.Length]
+			: new byte[dataWithMac.Length];
 
 		const byte MacLength = 16;
 		var data = dataWithMac[MacLength..];
@@ -41,11 +50,27 @@ public static class Decryptor
 
 	private static string NormalizeBase64(string encryptedText)
 	{
-		return encryptedText.Replace('-', '+').Replace('_', '/') + (encryptedText.Length % 4) switch
+		var suffixLength = (encryptedText.Length % 4) switch
 		{
-			2 => "==",
+			2 => 2,
-			3 => "=",
+			3 => 1,
-			_ => ""
+			_ => 0
 		};
+
+		var newLength = encryptedText.Length + suffixLength;
+		var normalized = newLength <= maxStackallocSize / sizeof(char)
+			? stackalloc char[newLength]
+			: new char[newLength];
+
+		encryptedText.CopyTo(normalized);
+		normalized.Replace('-', '+');
+		normalized.Replace('_', '/');
+
+		if (suffixLength > 0)
+		{
+			normalized[^suffixLength..].Fill('=');
+		}
+
+		return new string(normalized);
 	}
 }

YandexKeyExtractor/Exceptions/InvalidTrackIdException.cs

@@ -0,0 +1,10 @@
+using System;
+
+namespace YandexKeyExtractor.Exceptions;
+
+public class InvalidTrackIdException : Exception
+{
+	public InvalidTrackIdException() : base("Invalid track ID.")
+	{
+	}
+}

YandexKeyExtractor/Exceptions/NoValidBackupException.cs

@@ -0,0 +1,10 @@
+using System;
+
+namespace YandexKeyExtractor.Exceptions;
+
+public class NoValidBackupException : Exception
+{
+	public NoValidBackupException() : base(Localization.NoValidBackup)
+	{
+	}
+}

YandexKeyExtractor/Exceptions/ResponseFailedException.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+
+namespace YandexKeyExtractor.Exceptions;
+
+public class ResponseFailedException : Exception
+{
+	public string ResponseName { get; }
+	public string? Status { get; }
+	public IReadOnlyCollection<string>? Errors { get; }
+
+	public ResponseFailedException(string responseName) : base($"{responseName} failed.")
+	{
+		ResponseName = responseName;
+	}
+
+	public ResponseFailedException(string responseName, string? status, IReadOnlyCollection<string>? errors) : this(responseName)
+	{
+		Status = status;
+		Errors = errors;
+	}
+}

YandexKeyExtractor/Models/BackupInfo.cs

@@ -0,0 +1,10 @@
+using System.Text.Json.Serialization;
+
+namespace YandexKeyExtractor.Models;
+
+public class BackupInfo
+{
+	[JsonNumberHandling(JsonNumberHandling.AllowReadingFromString)]
+	[JsonPropertyName("updated")]
+	public uint Updated { get; set; }
+}

YandexKeyExtractor/Models/BackupInfoResponse.cs

@@ -6,11 +6,4 @@ public class BackupInfoResponse : StatusResponse
 {
 	[JsonPropertyName("backup_info")]
 	public BackupInfo? Info { get; set; }
-
-	public class BackupInfo
-	{
-		[JsonNumberHandling(JsonNumberHandling.AllowReadingFromString)]
-		[JsonPropertyName("updated")]
-		public uint Updated { get; set; }
-	}
 }

YandexKeyExtractor/Models/CountryResponse.cs

@@ -1,3 +1,4 @@
+using System.Collections.Generic;
 using System.Text.Json.Serialization;
 
 namespace YandexKeyExtractor.Models;
@@ -5,5 +6,5 @@ namespace YandexKeyExtractor.Models;
 public class CountryResponse : StatusResponse
 {
 	[JsonPropertyName("country")]
-	public string[]? Country { get; set; }
+	public IReadOnlyCollection<string>? Country { get; set; }
 }

YandexKeyExtractor/Models/PhoneNumberInfo.cs

@@ -0,0 +1,9 @@
+using System.Text.Json.Serialization;
+
+namespace YandexKeyExtractor.Models;
+
+public class PhoneNumberInfo
+{
+	[JsonPropertyName("e164")]
+	public string? StandardizedNumber { get; set; }
+}

YandexKeyExtractor/Models/PhoneNumberResponse.cs

@@ -6,10 +6,4 @@ public class PhoneNumberResponse : StatusResponse
 {
 	[JsonPropertyName("number")]
 	public PhoneNumberInfo? PhoneNumber { get; set; }
-
-	public class PhoneNumberInfo
-	{
-		[JsonPropertyName("e164")]
-		public string? StandardizedNumber { get; set; }
-	}
 }

YandexKeyExtractor/Models/SourceGenerationContext.cs

@@ -0,0 +1,14 @@
+using System.Text.Json.Serialization;
+
+namespace YandexKeyExtractor.Models;
+
+[JsonSerializable(typeof(BackupInfoResponse))]
+[JsonSerializable(typeof(BackupResponse))]
+[JsonSerializable(typeof(CountryResponse))]
+[JsonSerializable(typeof(PhoneNumberResponse))]
+[JsonSerializable(typeof(StatusResponse))]
+[JsonSerializable(typeof(TrackResponse))]
+[JsonSourceGenerationOptions(DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull)]
+public partial class SourceGenerationContext : JsonSerializerContext
+{
+}

YandexKeyExtractor/Models/StatusResponse.cs

@@ -1,3 +1,4 @@
+using System.Collections.Generic;
 using System.Text.Json.Serialization;
 
 namespace YandexKeyExtractor.Models;
@@ -8,7 +9,7 @@ public class StatusResponse
 	public string? Status { get; set; }
 
 	[JsonPropertyName("errors")]
-	public string[]? Errors { get; set; }
+	public IReadOnlyCollection<string>? Errors { get; set; }
 
 	public bool IsSuccess => Status == "ok";
 }

YandexKeyExtractor/Program.cs

@@ -1,65 +1,85 @@
 using System;
+using System.Globalization;
 using System.IO;
+using System.Threading.Tasks;
 using YandexKeyExtractor;
+using YandexKeyExtractor.Exceptions;
 
-Console.WriteLine("Initializing...");
+CultureInfo.CurrentCulture = CultureInfo.CurrentUICulture = CultureInfo.GetCultureInfo("ru-RU");
-using var handler = WebHandler.Create();
+Console.WriteLine(Localization.Initializing);
+using var handler = new WebHandler();
 
-var country = await handler.TryGetCountry();
+string backup;
-
+try
-PromptInput(out var phoneNumber, "phone number");
-
-phoneNumber = phoneNumber.TrimStart('+');
-var phone = await handler.GetPhoneNumberInfo(phoneNumber, country);
-
-var trackID = await handler.SendSMSCodeAndGetTrackID(phone, country);
-if (string.IsNullOrEmpty(trackID))
 {
+	backup = await RetrieveBackup(handler);
+} catch (ResponseFailedException e)
+{
+	if (e.Status == null)
+	{
+		Console.WriteLine(Localization.ResponseFailed, e.ResponseName);
+	} else
+	{
+		Console.WriteLine(Localization.ResponseFailedWithDetails, e.Status, e.ResponseName, string.Join(", ", e.Errors ?? []));
+	}
+
 	return;
+} catch (NoValidBackupException)
+{
+	Console.WriteLine(Localization.NoValidBackup);
+
+	return;
+} catch (Exception e)
+{
+	Console.WriteLine(Localization.UnknownErrorOccurred, e.Message);
+
+	throw;
 }
 
-PromptInput(out var smsCode, "SMS code");
+PromptInput(out var backupPassword, Localization.BackupPasswordVariableName);
 
-if (!await handler.CheckCode(smsCode, trackID))
+Console.WriteLine(Localization.Decrypting);
-{
-	return;
-}
-
-if (!await handler.ValidateBackupInfo(phone, trackID, country))
-{
-	return;
-}
-
-var backup = await handler.GetBackupData(phone, trackID);
-if (string.IsNullOrEmpty(backup))
-{
-	return;
-}
-
-PromptInput(out var backupPassword, "backup password");
-
-Console.WriteLine("Decrypting...");
 var message = Decryptor.Decrypt(backup, backupPassword);
 if (string.IsNullOrEmpty(message))
 {
-	Console.WriteLine("Decryption failed! Most likely the password is wrong");
+	Console.WriteLine(Localization.DecryptionFailed);
 
 	return;
 }
 
-Console.WriteLine("Successfully decrypted!");
 await File.WriteAllTextAsync("result.txt", message);
-Console.WriteLine($"Written {message.Split('\n').Length} authenticators to the file (result.txt)");
+Console.WriteLine(Localization.Success, message.AsSpan().Count('\n') + 1);
 
 return;
 
-static void PromptInput(out string result, string argumentName = "")
+static async Task<string> RetrieveBackup(WebHandler handler)
 {
-	Console.WriteLine($"Enter {argumentName}:");
+	var country = await handler.TryGetCountry() ?? "ru";
+
+	PromptInput(out var phoneNumber, Localization.PhoneNumberVariableName);
+
+	phoneNumber = phoneNumber.TrimStart('+');
+	var phone = await handler.GetPhoneNumberInfo(phoneNumber, country);
+
+	var trackID = await handler.SendSMSCodeAndGetTrackID(phone, country);
+
+	PromptInput(out var smsCode, Localization.SmsCodeVariableName);
+
+	await handler.CheckCode(smsCode, trackID);
+	await handler.ValidateBackupInfo(phone, trackID, country);
+
+	var backup = await handler.GetBackupData(phone, trackID);
+
+	return backup;
+}
+
+static void PromptInput(out string result, string argumentName)
+{
+	Console.WriteLine(Localization.PromptVariable, argumentName.ToLower(CultureInfo.CurrentCulture));
 	var input = Console.ReadLine();
 	while (string.IsNullOrEmpty(input))
 	{
-		Console.WriteLine($"{argumentName} is invalid, try again:");
+		Console.WriteLine(Localization.InvalidVariableValue, argumentName);
 		input = Console.ReadLine();
 	}
 

YandexKeyExtractor/Resources/Localization.Designer.cs

@@ -0,0 +1,126 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace YandexKeyExtractor {
+    using System;
+    
+    
+    [System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "4.0.0.0")]
+    [System.Diagnostics.DebuggerNonUserCodeAttribute()]
+    [System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+    internal class Localization {
+        
+        private static System.Resources.ResourceManager resourceMan;
+        
+        private static System.Globalization.CultureInfo resourceCulture;
+        
+        [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+        internal Localization() {
+        }
+        
+        [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static System.Resources.ResourceManager ResourceManager {
+            get {
+                if (object.Equals(null, resourceMan)) {
+                    System.Resources.ResourceManager temp = new System.Resources.ResourceManager("YandexKeyExtractor.Resources.Localization", typeof(Localization).Assembly);
+                    resourceMan = temp;
+                }
+                return resourceMan;
+            }
+        }
+        
+        [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static System.Globalization.CultureInfo Culture {
+            get {
+                return resourceCulture;
+            }
+            set {
+                resourceCulture = value;
+            }
+        }
+        
+        internal static string Initializing {
+            get {
+                return ResourceManager.GetString("Initializing", resourceCulture);
+            }
+        }
+        
+        internal static string PhoneNumberVariableName {
+            get {
+                return ResourceManager.GetString("PhoneNumberVariableName", resourceCulture);
+            }
+        }
+        
+        internal static string PromptVariable {
+            get {
+                return ResourceManager.GetString("PromptVariable", resourceCulture);
+            }
+        }
+        
+        internal static string InvalidVariableValue {
+            get {
+                return ResourceManager.GetString("InvalidVariableValue", resourceCulture);
+            }
+        }
+        
+        internal static string SmsCodeVariableName {
+            get {
+                return ResourceManager.GetString("SmsCodeVariableName", resourceCulture);
+            }
+        }
+        
+        internal static string BackupPasswordVariableName {
+            get {
+                return ResourceManager.GetString("BackupPasswordVariableName", resourceCulture);
+            }
+        }
+        
+        internal static string Decrypting {
+            get {
+                return ResourceManager.GetString("Decrypting", resourceCulture);
+            }
+        }
+        
+        internal static string DecryptionFailed {
+            get {
+                return ResourceManager.GetString("DecryptionFailed", resourceCulture);
+            }
+        }
+        
+        internal static string Success {
+            get {
+                return ResourceManager.GetString("Success", resourceCulture);
+            }
+        }
+        
+        internal static string NoValidBackup {
+            get {
+                return ResourceManager.GetString("NoValidBackup", resourceCulture);
+            }
+        }
+        
+        internal static string ResponseFailed {
+            get {
+                return ResourceManager.GetString("ResponseFailed", resourceCulture);
+            }
+        }
+        
+        internal static string ResponseFailedWithDetails {
+            get {
+                return ResourceManager.GetString("ResponseFailedWithDetails", resourceCulture);
+            }
+        }
+        
+        internal static string UnknownErrorOccurred {
+            get {
+                return ResourceManager.GetString("UnknownErrorOccurred", resourceCulture);
+            }
+        }
+    }
+}

YandexKeyExtractor/Resources/Localization.resx

@@ -0,0 +1,60 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<root>
+    <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+        <xsd:element name="root" msdata:IsDataSet="true">
+
+        </xsd:element>
+    </xsd:schema>
+    <resheader name="resmimetype">
+        <value>text/microsoft-resx</value>
+    </resheader>
+    <resheader name="version">
+        <value>1.3</value>
+    </resheader>
+    <resheader name="reader">
+        <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+    </resheader>
+    <resheader name="writer">
+        <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+    </resheader>
+    <data name="Initializing" xml:space="preserve">
+        <value>Initializing...</value>
+    </data>
+    <data name="PhoneNumberVariableName" xml:space="preserve">
+        <value>Phone number</value>
+    </data>
+    <data name="PromptVariable" xml:space="preserve">
+        <value>Enter {0}:</value>
+    </data>
+    <data name="InvalidVariableValue" xml:space="preserve">
+        <value>{0} is invalid, try again:</value>
+    </data>
+    <data name="SmsCodeVariableName" xml:space="preserve">
+        <value>SMS code</value>
+    </data>
+    <data name="BackupPasswordVariableName" xml:space="preserve">
+        <value>Backup password</value>
+    </data>
+    <data name="Decrypting" xml:space="preserve">
+        <value>Decrypting...</value>
+    </data>
+    <data name="DecryptionFailed" xml:space="preserve">
+        <value>Decryption failed! Most likely the password is wrong.</value>
+    </data>
+    <data name="Success" xml:space="preserve">
+        <value>Success! Written {0} authenticators to the file (result.txt).</value>
+    </data>
+    <data name="NoValidBackup" xml:space="preserve">
+        <value>Couldn't find a valid backup!</value>
+    </data>
+    <data name="ResponseFailed" xml:space="preserve">
+        <value>Got an error while requesting {0}.</value>
+    </data>
+    <data name="ResponseFailedWithDetails" xml:space="preserve">
+        <value>Got an error status '{0}' while requesting {1}, errors: {2}.</value>
+    </data>
+    <data name="UnknownErrorOccurred" xml:space="preserve">
+        <value>An unknown error occurred: {0}.</value>
+    </data>
+</root>

YandexKeyExtractor/Resources/Localization.ru-RU.Designer.cs

@@ -0,0 +1,126 @@
+//------------------------------------------------------------------------------
+// <auto-generated>
+//     This code was generated by a tool.
+//
+//     Changes to this file may cause incorrect behavior and will be lost if
+//     the code is regenerated.
+// </auto-generated>
+//------------------------------------------------------------------------------
+
+namespace YandexKeyExtractor {
+    using System;
+    
+    
+    [System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "4.0.0.0")]
+    [System.Diagnostics.DebuggerNonUserCodeAttribute()]
+    [System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
+    internal class Localization_ru_RU {
+        
+        private static System.Resources.ResourceManager resourceMan;
+        
+        private static System.Globalization.CultureInfo resourceCulture;
+        
+        [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
+        internal Localization_ru_RU() {
+        }
+        
+        [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static System.Resources.ResourceManager ResourceManager {
+            get {
+                if (object.Equals(null, resourceMan)) {
+                    System.Resources.ResourceManager temp = new System.Resources.ResourceManager("YandexKeyExtractor.Localization_ru_RU", typeof(Localization_ru_RU).Assembly);
+                    resourceMan = temp;
+                }
+                return resourceMan;
+            }
+        }
+        
+        [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Advanced)]
+        internal static System.Globalization.CultureInfo Culture {
+            get {
+                return resourceCulture;
+            }
+            set {
+                resourceCulture = value;
+            }
+        }
+        
+        internal static string Initializing {
+            get {
+                return ResourceManager.GetString("Initializing", resourceCulture);
+            }
+        }
+        
+        internal static string PhoneNumberVariableName {
+            get {
+                return ResourceManager.GetString("PhoneNumberVariableName", resourceCulture);
+            }
+        }
+        
+        internal static string PromptVariable {
+            get {
+                return ResourceManager.GetString("PromptVariable", resourceCulture);
+            }
+        }
+        
+        internal static string InvalidVariableValue {
+            get {
+                return ResourceManager.GetString("InvalidVariableValue", resourceCulture);
+            }
+        }
+        
+        internal static string SmsCodeVariableName {
+            get {
+                return ResourceManager.GetString("SmsCodeVariableName", resourceCulture);
+            }
+        }
+        
+        internal static string BackupPasswordVariableName {
+            get {
+                return ResourceManager.GetString("BackupPasswordVariableName", resourceCulture);
+            }
+        }
+        
+        internal static string Decrypting {
+            get {
+                return ResourceManager.GetString("Decrypting", resourceCulture);
+            }
+        }
+        
+        internal static string DecryptionFailed {
+            get {
+                return ResourceManager.GetString("DecryptionFailed", resourceCulture);
+            }
+        }
+        
+        internal static string Success {
+            get {
+                return ResourceManager.GetString("Success", resourceCulture);
+            }
+        }
+        
+        internal static string NoValidBackup {
+            get {
+                return ResourceManager.GetString("NoValidBackup", resourceCulture);
+            }
+        }
+        
+        internal static string ResponseFailed {
+            get {
+                return ResourceManager.GetString("ResponseFailed", resourceCulture);
+            }
+        }
+        
+        internal static string ResponseFailedWithDetails {
+            get {
+                return ResourceManager.GetString("ResponseFailedWithDetails", resourceCulture);
+            }
+        }
+        
+        internal static string UnknownErrorOccurred {
+            get {
+                return ResourceManager.GetString("UnknownErrorOccurred", resourceCulture);
+            }
+        }
+    }
+}

YandexKeyExtractor/Resources/Localization.ru-RU.resx

@@ -0,0 +1,60 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<root>
+    <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+        <xsd:element name="root" msdata:IsDataSet="true">
+
+        </xsd:element>
+    </xsd:schema>
+    <resheader name="resmimetype">
+        <value>text/microsoft-resx</value>
+    </resheader>
+    <resheader name="version">
+        <value>1.3</value>
+    </resheader>
+    <resheader name="reader">
+        <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+    </resheader>
+    <resheader name="writer">
+        <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+    </resheader>
+    <data name="Initializing" xml:space="preserve">
+        <value>Загрузка...</value>
+    </data>
+    <data name="PhoneNumberVariableName" xml:space="preserve">
+        <value>Номер телефона</value>
+    </data>
+    <data name="PromptVariable" xml:space="preserve">
+        <value>Введите {0}:</value>
+    </data>
+    <data name="InvalidVariableValue" xml:space="preserve">
+        <value>{0} неверен, попробуйте ещё раз:</value>
+    </data>
+    <data name="SmsCodeVariableName" xml:space="preserve">
+        <value>Код из SMS</value>
+    </data>
+    <data name="BackupPasswordVariableName" xml:space="preserve">
+        <value>Пароль резервной копии</value>
+    </data>
+    <data name="Decrypting" xml:space="preserve">
+        <value>Дешифрование...</value>
+    </data>
+    <data name="DecryptionFailed" xml:space="preserve">
+        <value>Дешифрование не удалось! Скорее всего, был введён неправильный пароль.</value>
+    </data>
+    <data name="Success" xml:space="preserve">
+        <value>Успех! Записано {0} данных аутентификаторов в файл (result.txt).</value>
+    </data>
+    <data name="NoValidBackup" xml:space="preserve">
+        <value>Не получилось найти действительную резервную копию!</value>
+    </data>
+    <data name="ResponseFailed" xml:space="preserve">
+        <value>Получена ошибка при запросе {0}.</value>
+    </data>
+    <data name="ResponseFailedWithDetails" xml:space="preserve">
+        <value>Получен код ошибки '{0} при запросе {1}, ошибки: {2}.</value>
+    </data>
+    <data name="UnknownErrorOccurred" xml:space="preserve">
+        <value>Произошла неизвестная ошибка: {0}.</value>
+    </data>
+</root>

YandexKeyExtractor/WebHandler.cs

@@ -1,197 +1,130 @@
 using System;
+using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using System.Net.Http;
 using System.Net.Http.Headers;
+using System.Net.Http.Json;
 using System.Runtime.CompilerServices;
 using System.Text.Json;
-using System.Text.Json.Serialization;
 using System.Threading.Tasks;
-using Flurl.Http;
+using YandexKeyExtractor.Exceptions;
-using Flurl.Http.Configuration;
 using YandexKeyExtractor.Models;
 
 namespace YandexKeyExtractor;
 
 public sealed class WebHandler : IDisposable
 {
-	private WebHandler(IFlurlClient client) => Client = client;
+	private readonly HttpClient _client = new()
-	private IFlurlClient Client { get; }
-
-	public void Dispose()
-	{
-		Client.Dispose();
-	}
-
-	public async Task<bool> CheckCode(string? smsCode, string? trackID)
-	{
-		var checkCodeResponse = await Client.Request("/bundle/yakey_backup/check_code/")
-			.PostUrlEncodedAsync(
-				new
-				{
-					code = smsCode,
-					track_id = trackID
-				}
-			)
-			.ReceiveJson<StatusResponse?>();
-
-		return ValidateResponse(checkCodeResponse, nameof(checkCodeResponse));
-	}
-
-	public static WebHandler Create()
-	{
-		JsonSerializerOptions jsonSettings = new()
-		{
-			DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull
-		};
-
-		var client = new FlurlClient(
-			new HttpClient
 	{
 		DefaultRequestHeaders = {UserAgent = {new ProductInfoHeaderValue("okhttp", "2.7.5")}},
 		BaseAddress = new Uri("https://registrator.mobile.yandex.net/1/")
-			});
+	};
 
-		client.Settings.JsonSerializer = new DefaultJsonSerializer(jsonSettings);
+	private readonly JsonSerializerOptions _jsonSettings = new()
+	{
+		TypeInfoResolver = SourceGenerationContext.Default
+	};
 
-		return new WebHandler(client);
+	public async Task CheckCode(string smsCode, string trackID)
+	{
+		var checkCodeResponse = await PostUrlEncodedAndReceiveJson<StatusResponse>(
+			new Uri("bundle/yakey_backup/check_code/", UriKind.Relative),
+			new Dictionary<string, string>(2) {["code"] = smsCode, ["track_id"] = trackID});
+
+		ValidateResponse(checkCodeResponse);
 	}
 
-	public async Task<string?> GetBackupData(string phone, string? trackID)
+	public async Task<string> GetBackupData(string phone, string trackID)
 	{
-		var backupResponse = await Client.Request("/bundle/yakey_backup/download")
+		var backupResponse = await PostUrlEncodedAndReceiveJson<BackupResponse>(
-			.PostUrlEncodedAsync(
+			new Uri("bundle/yakey_backup/download", UriKind.Relative),
-				new
+			new Dictionary<string, string>(2) {["number"] = phone, ["track_id"] = trackID});
-				{
-					number = phone,
-					track_id = trackID
-				}
-			)
-			.ReceiveJson<BackupResponse?>();
 
-		if (!ValidateResponse(backupResponse, nameof(backupResponse)))
+		ValidateResponse(backupResponse);
-		{
-			return null;
-		}
 
 		if (string.IsNullOrEmpty(backupResponse.Backup))
 		{
-			Console.WriteLine("Fatal error - Couldn't find valid backup!");
+			throw new NoValidBackupException();
-
-			return null;
 		}
 
 		return backupResponse.Backup;
 	}
 
-	public async Task<string> GetPhoneNumberInfo(string? phoneNumber, string country)
+	public async Task<string> GetPhoneNumberInfo(string phoneNumber, string country)
 	{
-		var phoneNumberResponse = await Client.Request("/bundle/validate/phone_number/")
+		var phoneNumberResponse = await PostUrlEncodedAndReceiveJson<PhoneNumberResponse>(
-			.PostUrlEncodedAsync(
+			new Uri("bundle/validate/phone_number/", UriKind.Relative),
-				new
+			new Dictionary<string, string>(2) {["phone_number"] = phoneNumber, ["country"] = country});
-				{
-					phone_number = phoneNumber,
-					country
-				})
-			.ReceiveJson<PhoneNumberResponse?>();
 
-		ValidateResponse(phoneNumberResponse, nameof(phoneNumberResponse));
+		var phone = phoneNumberResponse?.PhoneNumber?.StandardizedNumber ?? $"+{phoneNumber}";
-
-		var phone = phoneNumberResponse?.PhoneNumber?.StandardizedNumber ?? '+' + phoneNumber;
 
 		return phone;
 	}
 
-	public async Task<string?> SendSMSCodeAndGetTrackID(string phone, string country)
+	public async Task<string> SendSMSCodeAndGetTrackID(string phone, string country)
 	{
-		var trackResponse = await Client.Request("/bundle/yakey_backup/send_code/")
+		var trackResponse = await PostUrlEncodedAndReceiveJson<TrackResponse>(
-			.PostUrlEncodedAsync(
+			new Uri("bundle/yakey_backup/send_code/", UriKind.Relative),
-				new
+			new Dictionary<string, string>(3) {["display_language"] = "en", ["number"] = phone, ["country"] = country});
-				{
-					display_language = "en",
-					number = phone,
-					country
-				})
-			.ReceiveJson<TrackResponse?>();
 
-		if (!ValidateResponse(trackResponse, nameof(trackResponse)))
+		ValidateResponse(trackResponse);
-		{
-			return null;
-		}
 
 		var trackID = trackResponse.TrackID;
 		if (string.IsNullOrEmpty(trackID))
 		{
-			Console.WriteLine("Track ID is empty!");
+			throw new InvalidTrackIdException();
-
-			return null;
 		}
 
 		return trackID;
 	}
 
-	public async Task<string> TryGetCountry()
+	public async Task<string?> TryGetCountry()
 	{
-		var countryResponse = await Client.Request("/suggest/country")
+		var countryResponse = await _client.GetFromJsonAsync<CountryResponse>(new Uri("suggest/country", UriKind.Relative));
-			.GetAsync()
-			.ReceiveJson<CountryResponse?>();
 
-		ValidateResponse(countryResponse, nameof(countryResponse));
+		return countryResponse?.Country?.FirstOrDefault();
-
-		var country = countryResponse?.Country?.FirstOrDefault() ?? "ru";
-
-		return country;
 	}
 
-	public async Task<bool> ValidateBackupInfo(string phone, string? trackID, string country)
+	public async Task ValidateBackupInfo(string phone, string trackID, string country)
 	{
-		var backupInfoResponse = await Client.Request("/bundle/yakey_backup/info/")
+		var backupInfoResponse = await PostUrlEncodedAndReceiveJson<BackupInfoResponse>(
-			.PostUrlEncodedAsync(
+			new Uri("bundle/yakey_backup/info/", UriKind.Relative),
-				new
+			new Dictionary<string, string>(3) {["number"] = phone, ["track_id"] = trackID, ["country"] = country});
-				{
-					number = phone,
-					track_id = trackID,
-					country
-				})
-			.ReceiveJson<BackupInfoResponse?>();
 
-		if (!ValidateResponse(backupInfoResponse, nameof(backupInfoResponse)))
+		ValidateResponse(backupInfoResponse);
-		{
-			return false;
-		}
 
 		if (backupInfoResponse.Info?.Updated == null)
 		{
-			Console.WriteLine("Fatal error - Couldn't find valid backup!");
+			throw new NoValidBackupException();
-
+		}
-			return false;
 	}
 
-		return true;
+	private async Task<T?> PostUrlEncodedAndReceiveJson<T>(Uri url, Dictionary<string, string> data)
+	{
+		using var content = new FormUrlEncodedContent(data);
+		using var responseMessage = await _client.PostAsync(url, content);
+		responseMessage.EnsureSuccessStatusCode();
+
+		return (await responseMessage.Content.ReadFromJsonAsync<T>(_jsonSettings))!;
 	}
 
-
+	private static void ValidateResponse<T>([NotNull] T? response,
-	private static bool ValidateResponse<T>([NotNullWhen(true)] T? response,
+		[CallerArgumentExpression(nameof(response))] string responseName = "") where T : StatusResponse
-		[CallerArgumentExpression("response")] string responseName = "") where T : StatusResponse
 	{
 		if (response == null)
 		{
-			Console.WriteLine(responseName + " failed!");
+			throw new ResponseFailedException(responseName);
-
-			return false;
 		}
 
 		if (!response.IsSuccess)
 		{
-			Console.WriteLine(responseName + $" failed with error {response.Status}!");
+			throw new ResponseFailedException(responseName, response.Status, response.Errors);
-			if (response.Errors != null)
+		}
+	}
+
+	public void Dispose()
 	{
-				Console.WriteLine("Errors: " + string.Join(',', response.Errors));
+		_client.Dispose();
-			}
-
-			return false;
-		}
-
-		return true;
 	}
 }

YandexKeyExtractor/YandexKeyExtractor.csproj

@@ -1,8 +1,10 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
 	<PropertyGroup>
-        <AssemblyVersion>1.0.0.0</AssemblyVersion>
+		<AnalysisMode>AllEnabledByDefault</AnalysisMode>
-        <FileVersion>1.0.0.0</FileVersion>
+		<AssemblyVersion>1.1.0</AssemblyVersion>
+		<FileVersion>1.1.0</FileVersion>
+		<NoWarn>$(NoWarn);CA1032;CA2007</NoWarn>
 		<Nullable>enable</Nullable>
 		<OutputType>Exe</OutputType>
 		<TargetFramework>net8.0</TargetFramework>
@@ -20,8 +22,31 @@
 
 	<ItemGroup>
 		<PackageReference Include="CryptSharpStandard" Version="1.0.0"/>
-        <PackageReference Include="Flurl.Http" Version="4.0.2"/>
 		<PackageReference Include="NaCl.Net" Version="0.1.13"/>
 	</ItemGroup>
 
+	<ItemGroup>
+		<AssemblyAttribute Include="System.Resources.NeutralResourcesLanguageAttribute">
+			<_Parameter1>en-US</_Parameter1>
+		</AssemblyAttribute>
+		<EmbeddedResource Update="Resources\Localization.resx">
+			<Generator>ResXFileCodeGenerator</Generator>
+			<LastGenOutput>Localization.Designer.cs</LastGenOutput>
+		</EmbeddedResource>
+		<Compile Update="Resources\Localization.Designer.cs">
+			<DesignTime>True</DesignTime>
+			<AutoGen>True</AutoGen>
+			<DependentUpon>Localization.resx</DependentUpon>
+		</Compile>
+		<EmbeddedResource Update="Resources\Localization.ru-RU.resx">
+			<Generator>ResXFileCodeGenerator</Generator>
+			<LastGenOutput>Localization.ru-RU.Designer.cs</LastGenOutput>
+		</EmbeddedResource>
+		<Compile Update="Resources\Localization.ru-RU.Designer.cs">
+			<DesignTime>True</DesignTime>
+			<AutoGen>True</AutoGen>
+			<DependentUpon>Localization.ru-RU.resx</DependentUpon>
+		</Compile>
+	</ItemGroup>
+
 </Project>