initial commit

2026-08-27 10:56:38 -06:00
commit 2e2fbbdb3c
4538 changed files with 820183 additions and 0 deletions
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+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+using PureCrack.Util;
+
+namespace PureCrack.Setup;
+
+public static class HostsManager
+{
+	private const string HostsPath = "C:\\Windows\\System32\\drivers\\etc\\hosts";
+
+	private const string BackupSuffix = ".purecrack-backup";
+
+	public static readonly string[] Domains = new string[3] { "api.purecoder.io", "api1.purecoder.io", "api2.purecoder.io" };
+
+	public static string Path => "C:\\Windows\\System32\\drivers\\etc\\hosts";
+
+	public static string BackupPath => "C:\\Windows\\System32\\drivers\\etc\\hosts.purecrack-backup";
+
+	public static bool Ensure()
+	{
+		if (!File.Exists("C:\\Windows\\System32\\drivers\\etc\\hosts"))
+		{
+			throw new FileNotFoundException("C:\\Windows\\System32\\drivers\\etc\\hosts missing — Windows install looks broken");
+		}
+		string content = File.ReadAllText("C:\\Windows\\System32\\drivers\\etc\\hosts");
+		HashSet<string> present = ScanPresent(content);
+		List<string> list = Domains.Where((string d) => !present.Contains(d)).ToList();
+		if (list.Count == 0)
+		{
+			Log.Info($"hosts: all {Domains.Length} entries already present");
+			return false;
+		}
+		if (!File.Exists(BackupPath))
+		{
+			File.Copy("C:\\Windows\\System32\\drivers\\etc\\hosts", BackupPath);
+			Log.Bullet("hosts: backup saved to " + BackupPath);
+		}
+		string text = EnsureTrailingNewline(content);
+		foreach (string item in list)
+		{
+			text = text + "127.0.0.1 " + item + "\n";
+			Log.Bullet("hosts: add 127.0.0.1 " + item);
+		}
+		File.WriteAllText("C:\\Windows\\System32\\drivers\\etc\\hosts", text);
+		FlushDns();
+		return true;
+	}
+
+	public static void Remove()
+	{
+		if (!File.Exists("C:\\Windows\\System32\\drivers\\etc\\hosts"))
+		{
+			return;
+		}
+		string[] array = File.ReadAllLines("C:\\Windows\\System32\\drivers\\etc\\hosts");
+		List<string> list = new List<string>(array.Length);
+		int num = 0;
+		string[] array2 = array;
+		foreach (string text in array2)
+		{
+			string trimmed = text.Trim();
+			if (trimmed.StartsWith("#") || trimmed.Length == 0)
+			{
+				list.Add(text);
+			}
+			else if (Domains.Any((string d) => LineMapsDomainToLoopback(trimmed, d)))
+			{
+				num++;
+			}
+			else
+			{
+				list.Add(text);
+			}
+		}
+		if (num > 0)
+		{
+			File.WriteAllText("C:\\Windows\\System32\\drivers\\etc\\hosts", string.Join("\n", list));
+			Log.Ok($"hosts: removed {num} entries");
+			FlushDns();
+		}
+	}
+
+	public static bool IsWritable()
+	{
+		try
+		{
+			using (File.Open("C:\\Windows\\System32\\drivers\\etc\\hosts", FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite))
+			{
+				return true;
+			}
+		}
+		catch (UnauthorizedAccessException)
+		{
+			return false;
+		}
+		catch (IOException)
+		{
+			return false;
+		}
+	}
+
+	private static HashSet<string> ScanPresent(string content)
+	{
+		HashSet<string> hashSet = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+		string[] array = content.Split(new char[1] { '\n' });
+		for (int i = 0; i < array.Length; i++)
+		{
+			string text = array[i].Trim();
+			if (text.Length == 0 || text.StartsWith("#"))
+			{
+				continue;
+			}
+			string[] domains = Domains;
+			foreach (string text2 in domains)
+			{
+				if (LineMapsDomainToLoopback(text, text2))
+				{
+					hashSet.Add(text2);
+				}
+			}
+		}
+		return hashSet;
+	}
+
+	private static bool LineMapsDomainToLoopback(string line, string domain)
+	{
+		string[] array = line.Split(new char[2] { ' ', '\t' }, StringSplitOptions.RemoveEmptyEntries);
+		if (array.Length < 2)
+		{
+			return false;
+		}
+		if (!array[0].StartsWith("127."))
+		{
+			return false;
+		}
+		for (int i = 1; i < array.Length; i++)
+		{
+			string text = array[i];
+			if (text.StartsWith("#"))
+			{
+				break;
+			}
+			if (string.Equals(text, domain, StringComparison.OrdinalIgnoreCase))
+			{
+				return true;
+			}
+		}
+		return false;
+	}
+
+	private static string EnsureTrailingNewline(string content)
+	{
+		if (content.Length != 0 && content[content.Length - 1] != '\n')
+		{
+			return content + "\n";
+		}
+		return content;
+	}
+
+	private static void FlushDns()
+	{
+		try
+		{
+			using Process process = Process.Start(new ProcessStartInfo("ipconfig", "/flushdns")
+			{
+				UseShellExecute = false,
+				CreateNoWindow = true,
+				RedirectStandardOutput = true,
+				RedirectStandardError = true
+			});
+			process?.WaitForExit(5000);
+			Log.Bullet("hosts: dns cache flushed");
+		}
+		catch (Exception ex)
+		{
+			Log.Warn("ipconfig /flushdns failed (non-fatal): " + ex.Message);
+		}
+	}
+}