-
Notifications
You must be signed in to change notification settings - Fork 2
/
HostsFileManager.cs
204 lines (164 loc) · 5.58 KB
/
HostsFileManager.cs
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Windows.Forms;
using System.Text;
namespace HostsManager
{
public static class HostsFileManager
{
public const string DISABLED_INDICATOR = "# disabled ";
public static List<HostsEntry> Entries = new List<HostsEntry>();
public static string Filename
{
get
{
return Path.Combine(Environment.SystemDirectory, @"drivers\etc\HOSTS");
}
}
public static HostsEntry FindEntry(String hostname)
{
foreach (HostsEntry entry in Entries)
{
if (entry.Host == hostname)
{
return entry;
}
}
return null;
}
public static void DeleteEntry(String hostname)
{
foreach (HostsEntry entry in Entries)
{
if (entry.Host == hostname)
{
Entries.Remove(entry);
break;
}
}
}
public static string GenerateHostsText()
{
string[] lines = GenerateHostsLines();
StringBuilder outText = new StringBuilder();
foreach (string ln in lines)
{
outText.Append(ln);
outText.Append(Environment.NewLine);
}
return outText.ToString();
}
public static string[] GenerateHostsLines()
{
List<string> outLines = new List<string>();
List<string> seenHosts = new List<string>();
var raw = File.ReadAllLines(Filename);
foreach (string line in raw)
{
bool isDisabledEntry = line.StartsWith(DISABLED_INDICATOR);
if (line.StartsWith("#") && !isDisabledEntry)
{
outLines.Add(line);
continue;
}
string aLine = line;
if (isDisabledEntry)
{
aLine = line.Substring(DISABLED_INDICATOR.Length).Trim();
}
string[] parts = aLine
.Replace('\t', ' ')
.Trim()
.Split(' ');
if (parts.Length == 2)
{
String address = parts[0];
String host = parts[1];
if (seenHosts.Contains(host))
{
continue;
}
seenHosts.Add(host);
HostsEntry customEntry = FindEntry(host);
// If we do not have a mutation for this line it has been deleted in the editor (or added after saving)
if (customEntry == null)
{
continue;
}
// If we DO have an entry, it might have been mutated by the editor, so provide an alternate version of this line
else
{
StringBuilder customLine = new StringBuilder();
if (!customEntry.Enabled)
{
customLine.Append(DISABLED_INDICATOR);
}
customLine.Append(customEntry.Address);
customLine.Append(" ");
customLine.Append(customEntry.Host);
outLines.Add(customLine.ToString());
}
}
else
{
outLines.Add(line);
}
}
foreach (HostsEntry customEntry in Entries)
{
if (seenHosts.Contains(customEntry.Host))
{
continue;
}
StringBuilder customLine = new StringBuilder();
if (!customEntry.Enabled)
{
customLine.Append(DISABLED_INDICATOR);
}
customLine.Append(customEntry.Address);
customLine.Append(" ");
customLine.Append(customEntry.Host);
outLines.Add(customLine.ToString());
}
return outLines.ToArray();
}
public static void RefreshData()
{
Entries.Clear();
var raw = File.ReadAllLines(Filename);
foreach (string line in raw)
{
bool isDisabledEntry = line.StartsWith(DISABLED_INDICATOR);
if (line.StartsWith("#") && !isDisabledEntry)
{
continue;
}
string aLine = line;
if (isDisabledEntry)
{
aLine = line.Substring(DISABLED_INDICATOR.Length).Trim();
}
string[] parts = aLine
.Replace('\t', ' ')
.Trim()
.Split(' ');
if (parts.Length != 2)
{
continue;
}
Entries.Add(new HostsEntry()
{
Address = parts[0],
Host = parts[1],
Enabled = !isDisabledEntry
});
}
}
public static void Save()
{
File.WriteAllLines(HostsFileManager.Filename, GenerateHostsLines());
}
}
}