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HostsHelper.cs
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HostsHelper.cs
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using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Windows.Forms;
namespace Optimizer
{
internal static class HostsHelper
{
internal static string NewLine = Environment.NewLine;
internal static readonly string HostsFile = CleanHelper.System32Folder + "\\drivers\\etc\\hosts";
internal static void RestoreDefaultHosts()
{
try
{
if (File.Exists(HostsFile))
{
File.Delete(HostsFile);
}
File.WriteAllBytes(HostsFile, Properties.Resources.hosts);
}
catch (Exception ex)
{
Logger.LogError("HostsHelper.RestoreDefaultHosts", ex.Message, ex.StackTrace);
MessageBox.Show(OptionsHelper.TranslationList("dnsCacheM").ToString(), "Optimizer", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
internal static string[] ReadHosts()
{
StringBuilder sb = new StringBuilder();
try
{
using (StreamReader sr = File.OpenText(HostsFile))
{
sb.Append(sr.ReadToEnd());
}
}
catch (Exception ex)
{
Logger.LogError("HostsHelper.ReadHosts", ex.Message, ex.StackTrace);
}
return sb.ToString().Split(Environment.NewLine.ToCharArray());
//return File.ReadAllLines(HostsFile);
}
internal static string ReadHostsFast()
{
StringBuilder sb = new StringBuilder();
try
{
using (StreamReader sr = File.OpenText(HostsFile))
{
sb.Append(sr.ReadToEnd());
}
}
catch (Exception ex)
{
Logger.LogError("HostsHelper.ReadHostsFast", ex.Message, ex.StackTrace);
}
return sb.ToString();
}
internal static void LocateHosts()
{
Utilities.FindFile(HostsFile);
}
internal static void SaveHosts(string[] lines)
{
for (int i = 0; i < lines.Length; i++)
{
if (!lines[i].StartsWith("#") && (!string.IsNullOrEmpty(lines[i])))
{
lines[i] = SanitizeEntry(lines[i]);
}
}
try
{
File.WriteAllText(HostsFile, string.Empty);
File.WriteAllLines(HostsFile, lines);
}
catch (Exception ex)
{
Logger.LogError("HostsHelper.SaveHosts", ex.Message, ex.StackTrace);
MessageBox.Show(OptionsHelper.TranslationList("dnsCacheM").ToString(), "Optimizer", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
internal static List<string> GetHostsEntries()
{
List<string> entries = new List<string>();
//string[] lines = File.ReadAllLines(HostsFile);
string[] lines = ReadHosts();
foreach (string line in lines)
{
if (!line.StartsWith("#") && (!string.IsNullOrEmpty(line)))
{
entries.Add(line.Replace(" ", " : "));
}
}
return entries;
}
internal static void AddEntry(string entry)
{
try
{
File.AppendAllText(HostsFile, NewLine + $"{entry}");
}
catch (Exception ex)
{
Logger.LogError("HostsHelper.AddEntry", ex.Message, ex.StackTrace);
MessageBox.Show(OptionsHelper.TranslationList("dnsCacheM").ToString(), "DNS Cache is running", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
internal static void RemoveEntry(string entry)
{
try
{
File.WriteAllLines(HostsFile, File.ReadLines(HostsFile).Where(x => x != entry).ToList());
}
catch (Exception ex)
{
Logger.LogError("HostsHelper.RemoveEntry", ex.Message, ex.StackTrace);
MessageBox.Show(OptionsHelper.TranslationList("dnsCacheM").ToString(), "DNS Cache is running", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
internal static void RemoveEntryFromTemplate(string domain)
{
try
{
File.WriteAllLines(HostsFile, File.ReadLines(HostsFile).Where(x => !x.Contains(domain)).ToList());
}
catch (Exception ex)
{
Logger.LogError("HostsHelper.RemoveEntryFromTemplate", ex.Message, ex.StackTrace);
}
}
internal static void RemoveAllEntries(List<string> collection)
{
try
{
foreach (string text in collection)
{
File.WriteAllLines(HostsFile, File.ReadLines(HostsFile).Where(l => l != text).ToList());
}
}
catch (Exception ex)
{
Logger.LogError("HostsHelper.RemoveAllEntries", ex.Message, ex.StackTrace);
MessageBox.Show(OptionsHelper.TranslationList("dnsCacheM").ToString(), "DNS Cache is running", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
internal static string SanitizeEntry(string entry)
{
// remove multiple white spaces and keep only one
return Regex.Replace(entry, @"\s{2,}", " ");
}
internal static bool GetReadOnly()
{
try
{
return new FileInfo(HostsFile).IsReadOnly;
}
catch (Exception ex)
{
Logger.LogError("HostsHelper.ReadOnly", ex.Message, ex.StackTrace);
return false;
}
}
internal static void ReadOnly(bool enable)
{
try
{
FileInfo fi = new FileInfo(HostsFile);
fi.IsReadOnly = enable;
}
catch (Exception ex)
{
Logger.LogError("HostsHelper.ReadOnly", ex.Message, ex.StackTrace);
}
}
}
}