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| 2471 | - | 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 | } |