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2498 | - | 1 | |
2 | namespace GMap.NET.Internals |
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3 | { |
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4 | using System; |
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5 | using System.Diagnostics; |
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6 | using System.IO; |
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7 | using System.Text; |
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8 | using GMap.NET.CacheProviders; |
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9 | using System.Security.Cryptography; |
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10 | |||
11 | internal class CacheLocator |
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12 | { |
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13 | private static string location; |
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14 | public static string Location |
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15 | { |
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16 | get |
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17 | { |
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18 | if(string.IsNullOrEmpty(location)) |
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19 | { |
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20 | Reset(); |
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21 | } |
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22 | |||
23 | return location; |
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24 | } |
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25 | set |
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26 | { |
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27 | if(string.IsNullOrEmpty(value)) // setting to null resets to default |
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28 | { |
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29 | Reset(); |
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30 | } |
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31 | else |
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32 | { |
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33 | location = value; |
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34 | } |
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35 | |||
36 | if(Delay) |
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37 | { |
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38 | Cache.Instance.CacheLocation = location; |
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39 | } |
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40 | } |
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41 | } |
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42 | |||
43 | static void Reset() |
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44 | { |
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45 | string appDataLocation = GetApplicationDataFolderPath(); |
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46 | |||
47 | #if !PocketPC |
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48 | // http://greatmaps.codeplex.com/discussions/403151 |
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49 | // by default Network Service don't have disk write access |
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50 | if(string.IsNullOrEmpty(appDataLocation)) |
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51 | { |
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52 | GMaps.Instance.Mode = AccessMode.ServerOnly; |
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53 | GMaps.Instance.UseDirectionsCache = false; |
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54 | GMaps.Instance.UseGeocoderCache = false; |
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55 | GMaps.Instance.UsePlacemarkCache = false; |
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56 | GMaps.Instance.UseRouteCache = false; |
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57 | GMaps.Instance.UseUrlCache = false; |
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58 | } |
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59 | else |
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60 | #endif |
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61 | { |
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62 | Location = appDataLocation; |
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63 | } |
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64 | } |
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65 | |||
66 | public static string GetApplicationDataFolderPath() |
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67 | { |
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68 | #if !PocketPC |
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69 | bool isSystem = false; |
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70 | try |
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71 | { |
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72 | using(var identity = System.Security.Principal.WindowsIdentity.GetCurrent()) |
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73 | { |
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74 | if(identity != null) |
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75 | { |
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76 | isSystem = identity.IsSystem; |
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77 | } |
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78 | } |
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79 | } |
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80 | catch(Exception ex) |
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81 | { |
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82 | Trace.WriteLine("SQLitePureImageCache, WindowsIdentity.GetCurrent: " + ex); |
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83 | } |
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84 | |||
85 | string path = string.Empty; |
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86 | |||
87 | // https://greatmaps.codeplex.com/workitem/16112 |
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88 | if(isSystem) |
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89 | { |
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90 | path = System.Environment.GetFolderPath(System.Environment.SpecialFolder.CommonApplicationData); |
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91 | } |
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92 | else |
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93 | { |
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94 | path = System.Environment.GetFolderPath(System.Environment.SpecialFolder.LocalApplicationData); |
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95 | } |
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96 | #else |
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97 | path = System.Environment.GetFolderPath(System.Environment.SpecialFolder.ApplicationData); |
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98 | #endif |
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99 | |||
100 | if(!string.IsNullOrEmpty(path)) |
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101 | { |
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102 | path += Path.DirectorySeparatorChar + "GMap.NET" + Path.DirectorySeparatorChar; |
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103 | } |
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104 | |||
105 | return path; |
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106 | } |
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107 | |||
108 | public static bool Delay = false; |
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109 | } |
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110 | |||
111 | /// <summary> |
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112 | /// cache system for tiles, geocoding, etc... |
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113 | /// </summary> |
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114 | internal class Cache : Singleton<Cache> |
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115 | { |
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116 | /// <summary> |
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117 | /// abstract image cache |
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118 | /// </summary> |
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119 | public PureImageCache ImageCache; |
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120 | |||
121 | /// <summary> |
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122 | /// second level abstract image cache |
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123 | /// </summary> |
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124 | public PureImageCache ImageCacheSecond; |
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125 | |||
126 | string cache; |
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127 | |||
128 | /// <summary> |
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129 | /// local cache location |
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130 | /// </summary> |
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131 | public string CacheLocation |
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132 | { |
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133 | get |
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134 | { |
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135 | return cache; |
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136 | } |
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137 | set |
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138 | { |
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139 | cache = value; |
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140 | #if SQLite |
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141 | if(ImageCache is SQLitePureImageCache) |
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142 | { |
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143 | (ImageCache as SQLitePureImageCache).CacheLocation = value; |
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144 | } |
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145 | #else |
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146 | if(ImageCache is MsSQLCePureImageCache) |
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147 | { |
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148 | (ImageCache as MsSQLCePureImageCache).CacheLocation = value; |
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149 | } |
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150 | #endif |
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151 | CacheLocator.Delay = true; |
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152 | } |
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153 | } |
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154 | |||
155 | public Cache() |
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156 | { |
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157 | #region singleton check |
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158 | if(Instance != null) |
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159 | { |
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160 | throw (new System.Exception("You have tried to create a new singleton class where you should have instanced it. Replace your \"new class()\" with \"class.Instance\"")); |
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161 | } |
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162 | #endregion |
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163 | |||
164 | #if SQLite |
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165 | ImageCache = new SQLitePureImageCache(); |
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166 | #else |
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167 | // you can use $ms stuff if you like too ;} |
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168 | ImageCache = new MsSQLCePureImageCache(); |
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169 | #endif |
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170 | |||
171 | #if PocketPC |
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172 | // use sd card if exist for cache |
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173 | string sd = Native.GetRemovableStorageDirectory(); |
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174 | if(!string.IsNullOrEmpty(sd)) |
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175 | { |
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176 | CacheLocation = sd + Path.DirectorySeparatorChar + "GMap.NET" + Path.DirectorySeparatorChar; |
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177 | } |
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178 | else |
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179 | #endif |
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180 | { |
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181 | #if PocketPC |
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182 | CacheLocation = CacheLocator.Location; |
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183 | #else |
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184 | string newCache = CacheLocator.Location; |
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185 | |||
186 | string oldCache = System.Environment.GetFolderPath(System.Environment.SpecialFolder.ApplicationData) + Path.DirectorySeparatorChar + "GMap.NET" + Path.DirectorySeparatorChar; |
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187 | |||
188 | // move database to non-roaming user directory |
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189 | if(Directory.Exists(oldCache)) |
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190 | { |
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191 | try |
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192 | { |
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193 | if(Directory.Exists(newCache)) |
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194 | { |
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195 | Directory.Delete(oldCache, true); |
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196 | } |
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197 | else |
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198 | { |
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199 | Directory.Move(oldCache, newCache); |
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200 | } |
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201 | CacheLocation = newCache; |
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202 | } |
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203 | catch(Exception ex) |
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204 | { |
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205 | CacheLocation = oldCache; |
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206 | Trace.WriteLine("SQLitePureImageCache, moving data: " + ex.ToString()); |
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207 | } |
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208 | } |
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209 | else |
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210 | { |
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211 | CacheLocation = newCache; |
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212 | } |
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213 | #endif |
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214 | } |
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215 | } |
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216 | |||
217 | #region -- etc cache -- |
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218 | |||
219 | static readonly SHA1CryptoServiceProvider HashProvider = new SHA1CryptoServiceProvider(); |
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220 | |||
221 | void ConvertToHash(ref string s) |
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222 | { |
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223 | s = BitConverter.ToString(HashProvider.ComputeHash(Encoding.Unicode.GetBytes(s))); |
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224 | } |
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225 | |||
226 | public void SaveContent(string url, CacheType type, string content) |
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227 | { |
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228 | try |
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229 | { |
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230 | ConvertToHash(ref url); |
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231 | |||
232 | string dir = Path.Combine(cache, type.ToString()) + Path.DirectorySeparatorChar; |
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233 | |||
234 | // precrete dir |
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235 | if(!Directory.Exists(dir)) |
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236 | { |
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237 | Directory.CreateDirectory(dir); |
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238 | } |
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239 | |||
240 | string file = dir + url + ".txt"; |
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241 | |||
242 | using(StreamWriter writer = new StreamWriter(file, false, Encoding.UTF8)) |
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243 | { |
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244 | writer.Write(content); |
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245 | } |
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246 | } |
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247 | catch(Exception ex) |
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248 | { |
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249 | Debug.WriteLine("SaveContent: " + ex); |
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250 | } |
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251 | } |
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252 | |||
253 | public string GetContent(string url, CacheType type, TimeSpan stayInCache) |
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254 | { |
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255 | string ret = null; |
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256 | |||
257 | try |
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258 | { |
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259 | ConvertToHash(ref url); |
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260 | |||
261 | string dir = Path.Combine(cache, type.ToString()) + Path.DirectorySeparatorChar; |
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262 | string file = dir + url + ".txt"; |
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263 | |||
264 | if(File.Exists(file)) |
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265 | { |
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266 | var writeTime = File.GetLastWriteTime(file); |
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267 | if (DateTime.Now - writeTime < stayInCache) |
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268 | { |
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269 | using (StreamReader r = new StreamReader(file, Encoding.UTF8)) |
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270 | { |
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271 | ret = r.ReadToEnd(); |
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272 | } |
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273 | } |
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274 | else |
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275 | { |
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276 | File.Delete(file); |
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277 | } |
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278 | } |
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279 | } |
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280 | catch(Exception ex) |
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281 | { |
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282 | ret = null; |
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283 | Debug.WriteLine("GetContent: " + ex); |
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284 | } |
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285 | |||
286 | return ret; |
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287 | } |
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288 | |||
289 | public string GetContent(string url, CacheType type) |
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290 | { |
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291 | return GetContent(url, type, TimeSpan.FromDays(88)); |
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292 | } |
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293 | |||
294 | #endregion |
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295 | } |
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296 | |||
297 | internal enum CacheType |
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298 | { |
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299 | GeocoderCache, |
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300 | PlacemarkCache, |
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301 | RouteCache, |
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302 | UrlCache, |
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303 | DirectionsCache, |
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304 | } |
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305 | } |