netwerk/cache/src/nsDiskCacheDeviceSQL.h

   1 /* vim:set ts=2 sw=2 sts=2 et cin: */
   2 /* ***** BEGIN LICENSE BLOCK *****
   3  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   4  *
   5  * The contents of this file are subject to the Mozilla Public License Version
   6  * 1.1 (the "License"); you may not use this file except in compliance with
   7  * the License. You may obtain a copy of the License at
   8  * http://www.mozilla.org/MPL/
   9  *
  10  * Software distributed under the License is distributed on an "AS IS" basis,
  11  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  12  * for the specific language governing rights and limitations under the
  13  * License.
  14  *
  15  * The Original Code is Mozilla.
  16  *
  17  * The Initial Developer of the Original Code is IBM Corporation.
  18  * Portions created by IBM Corporation are Copyright (C) 2004
  19  * IBM Corporation. All Rights Reserved.
  20  *
  21  * Contributor(s):
  22  *   Darin Fisher <darin@meer.net>
  23  *
  24  * Alternatively, the contents of this file may be used under the terms of
  25  * either the GNU General Public License Version 2 or later (the "GPL"), or
  26  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  27  * in which case the provisions of the GPL or the LGPL are applicable instead
  28  * of those above. If you wish to allow use of your version of this file only
  29  * under the terms of either the GPL or the LGPL, and not to allow others to
  30  * use your version of this file under the terms of the MPL, indicate your
  31  * decision by deleting the provisions above and replace them with the notice
  32  * and other provisions required by the GPL or the LGPL. If you do not delete
  33  * the provisions above, a recipient may use your version of this file under
  34  * the terms of any one of the MPL, the GPL or the LGPL.
  35  *
  36  * ***** END LICENSE BLOCK ***** */
  37
  38 #ifndef nsOfflineCacheDevice_h__
  39 #define nsOfflineCacheDevice_h__
  40
  41 #include "nsCacheDevice.h"
  42 #include "nsIApplicationCache.h"
  43 #include "nsIApplicationCacheService.h"
  44 #include "nsILocalFile.h"
  45 #include "nsIObserver.h"
  46 #include "mozIStorageConnection.h"
  47 #include "mozIStorageFunction.h"
  48 #include "nsIFile.h"
  49 #include "nsAutoPtr.h"
  50 #include "nsCOMPtr.h"
  51 #include "nsCOMArray.h"
  52 #include "nsVoidArray.h"
  53 #include "nsInterfaceHashtable.h"
  54 #include "nsClassHashtable.h"
  55 #include "nsHashSets.h"
  56 #include "nsWeakReference.h"
  57
  58 class nsIURI;
  59 class nsOfflineCacheDevice;
  60
  61 class nsApplicationCacheNamespace : public nsIApplicationCacheNamespace
  62 {
  63 public:
  64   NS_DECL_ISUPPORTS
  65   NS_DECL_NSIAPPLICATIONCACHENAMESPACE
  66
  67   nsApplicationCacheNamespace() : mItemType(0) {}
  68
  69 private:
  70   PRUint32 mItemType;
  71   nsCString mNamespaceSpec;
  72   nsCString mData;
  73 };
  74
  75 class nsOfflineCacheEvictionFunction : public mozIStorageFunction {
  76 public:
  77   NS_DECL_ISUPPORTS
  78   NS_DECL_MOZISTORAGEFUNCTION
  79
  80   nsOfflineCacheEvictionFunction(nsOfflineCacheDevice *device)
  81     : mDevice(device)
  82   {}
  83
  84   void Reset() { mItems.Clear(); }
  85   void Apply();
  86
  87 private:
  88   nsOfflineCacheDevice *mDevice;
  89   nsCOMArray<nsIFile> mItems;
  90
  91 };
  92
  93 class nsOfflineCacheDevice : public nsCacheDevice
  94                            , public nsIApplicationCacheService
  95 {
  96 public:
  97   nsOfflineCacheDevice();
  98
  99   NS_DECL_ISUPPORTS
 100   NS_DECL_NSIAPPLICATIONCACHESERVICE
 101
 102   /**
 103    * nsCacheDevice methods
 104    */
 105
 106   virtual ~nsOfflineCacheDevice();
 107
 108   static nsOfflineCacheDevice *GetInstance();
 109
 110   virtual nsresult        Init();
 111   virtual nsresult        Shutdown();
 112
 113   virtual const char *    GetDeviceID(void);
 114   virtual nsCacheEntry *  FindEntry(nsCString * key, PRBool *collision);
 115   virtual nsresult        DeactivateEntry(nsCacheEntry * entry);
 116   virtual nsresult        BindEntry(nsCacheEntry * entry);
 117   virtual void            DoomEntry( nsCacheEntry * entry );
 118
 119   virtual nsresult OpenInputStreamForEntry(nsCacheEntry *    entry,
 120                                            nsCacheAccessMode mode,
 121                                            PRUint32          offset,
 122                                            nsIInputStream ** result);
 123
 124   virtual nsresult OpenOutputStreamForEntry(nsCacheEntry *     entry,
 125                                             nsCacheAccessMode  mode,
 126                                             PRUint32           offset,
 127                                             nsIOutputStream ** result);
 128
 129   virtual nsresult        GetFileForEntry(nsCacheEntry *    entry,
 130                                           nsIFile **        result);
 131
 132   virtual nsresult        OnDataSizeChange(nsCacheEntry * entry, PRInt32 deltaSize);
 133
 134   virtual nsresult        Visit(nsICacheVisitor * visitor);
 135
 136   virtual nsresult        EvictEntries(const char * clientID);
 137
 138
 139   /* Entry ownership */
 140   nsresult                GetOwnerDomains(const char *        clientID,
 141                                           PRUint32 *          count,
 142                                           char ***            domains);
 143   nsresult                GetOwnerURIs(const char *           clientID,
 144                                        const nsACString &     ownerDomain,
 145                                        PRUint32 *             count,
 146                                        char ***               uris);
 147   nsresult                SetOwnedKeys(const char *           clientID,
 148                                        const nsACString &     ownerDomain,
 149                                        const nsACString &     ownerUrl,
 150                                        PRUint32               count,
 151                                        const char **          keys);
 152   nsresult                GetOwnedKeys(const char *           clientID,
 153                                        const nsACString &     ownerDomain,
 154                                        const nsACString &     ownerUrl,
 155                                        PRUint32 *             count,
 156                                        char ***               keys);
 157   nsresult                AddOwnedKey(const char *            clientID,
 158                                       const nsACString &      ownerDomain,
 159                                       const nsACString &      ownerURI,
 160                                       const nsACString &      key);
 161   nsresult                RemoveOwnedKey(const char *         clientID,
 162                                          const nsACString &   ownerDomain,
 163                                          const nsACString &   ownerURI,
 164                                          const nsACString &   key);
 165   nsresult                KeyIsOwned(const char *             clientID,
 166                                      const nsACString &       ownerDomain,
 167                                      const nsACString &       ownerURI,
 168                                      const nsACString &       key,
 169                                      PRBool *                 isOwned);
 170
 171   nsresult                ClearKeysOwnedByDomain(const char *clientID,
 172                                                  const nsACString &ownerDomain);
 173   nsresult                EvictUnownedEntries(const char *clientID);
 174
 175   nsresult                ActivateCache(const nsCSubstring &group,
 176                                         const nsCSubstring &clientID);
 177   PRBool                  IsActiveCache(const nsCSubstring &group,
 178                                         const nsCSubstring &clientID);
 179   nsresult                GetGroupForCache(const nsCSubstring &clientID,
 180                                            nsCString &out);
 181
 182   /**
 183    * Preference accessors
 184    */
 185
 186   void                    SetCacheParentDirectory(nsILocalFile * parentDir);
 187   void                    SetCapacity(PRUint32  capacity);
 188
 189   nsILocalFile *          CacheDirectory() { return mCacheDirectory; }
 190   PRUint32                CacheCapacity() { return mCacheCapacity; }
 191   PRUint32                CacheSize();
 192   PRUint32                EntryCount();
 193
 194 private:
 195   friend class nsApplicationCache;
 196
 197   static PLDHashOperator ShutdownApplicationCache(const nsACString &key,
 198                                                   nsIWeakReference *weakRef,
 199                                                   void *ctx);
 200
 201   static PRBool GetStrictFileOriginPolicy();
 202
 203   PRBool   Initialized() { return mDB != nsnull; }
 204
 205   nsresult InitActiveCaches();
 206   nsresult UpdateEntry(nsCacheEntry *entry);
 207   nsresult UpdateEntrySize(nsCacheEntry *entry, PRUint32 newSize);
 208   nsresult DeleteEntry(nsCacheEntry *entry, PRBool deleteData);
 209   nsresult DeleteData(nsCacheEntry *entry);
 210   nsresult EnableEvictionObserver();
 211   nsresult DisableEvictionObserver();
 212
 213   PRBool CanUseCache(nsIURI *keyURI, const nsCString &clientID);
 214
 215   nsresult MarkEntry(const nsCString &clientID,
 216                      const nsACString &key,
 217                      PRUint32 typeBits);
 218   nsresult UnmarkEntry(const nsCString &clientID,
 219                        const nsACString &key,
 220                        PRUint32 typeBits);
 221
 222   nsresult CacheOpportunistically(const nsCString &clientID,
 223                                   const nsACString &key);
 224   nsresult GetTypes(const nsCString &clientID,
 225                     const nsACString &key,
 226                     PRUint32 *typeBits);
 227
 228   nsresult GetMatchingNamespace(const nsCString &clientID,
 229                                 const nsACString &key,
 230                                 nsIApplicationCacheNamespace **out);
 231   nsresult GatherEntries(const nsCString &clientID,
 232                          PRUint32 typeBits,
 233                          PRUint32 *count,
 234                          char *** values);
 235   nsresult AddNamespace(const nsCString &clientID,
 236                         nsIApplicationCacheNamespace *ns);
 237
 238   nsresult RunSimpleQuery(mozIStorageStatement *statment,
 239                           PRUint32 resultIndex,
 240                           PRUint32 * count,
 241                           char *** values);
 242
 243   nsCOMPtr<mozIStorageConnection>          mDB;
 244   nsRefPtr<nsOfflineCacheEvictionFunction> mEvictionFunction;
 245
 246   nsCOMPtr<mozIStorageStatement>  mStatement_CacheSize;
 247   nsCOMPtr<mozIStorageStatement>  mStatement_DomainSize;
 248   nsCOMPtr<mozIStorageStatement>  mStatement_EntryCount;
 249   nsCOMPtr<mozIStorageStatement>  mStatement_UpdateEntry;
 250   nsCOMPtr<mozIStorageStatement>  mStatement_UpdateEntrySize;
 251   nsCOMPtr<mozIStorageStatement>  mStatement_UpdateEntryFlags;
 252   nsCOMPtr<mozIStorageStatement>  mStatement_DeleteEntry;
 253   nsCOMPtr<mozIStorageStatement>  mStatement_FindEntry;
 254   nsCOMPtr<mozIStorageStatement>  mStatement_BindEntry;
 255   nsCOMPtr<mozIStorageStatement>  mStatement_ClearDomain;
 256   nsCOMPtr<mozIStorageStatement>  mStatement_MarkEntry;
 257   nsCOMPtr<mozIStorageStatement>  mStatement_UnmarkEntry;
 258   nsCOMPtr<mozIStorageStatement>  mStatement_GetTypes;
 259   nsCOMPtr<mozIStorageStatement>  mStatement_FindNamespaceEntry;
 260   nsCOMPtr<mozIStorageStatement>  mStatement_InsertNamespaceEntry;
 261   nsCOMPtr<mozIStorageStatement>  mStatement_CleanupUnmarked;
 262   nsCOMPtr<mozIStorageStatement>  mStatement_GatherEntries;
 263   nsCOMPtr<mozIStorageStatement>  mStatement_ActivateClient;
 264   nsCOMPtr<mozIStorageStatement>  mStatement_DeactivateGroup;
 265   nsCOMPtr<mozIStorageStatement>  mStatement_FindClient;
 266   nsCOMPtr<mozIStorageStatement>  mStatement_FindClientByNamespace;
 267
 268   nsCOMPtr<nsILocalFile>          mCacheDirectory;
 269   PRUint32                        mCacheCapacity;
 270   PRInt32                         mDeltaCounter;
 271
 272   nsInterfaceHashtable<nsCStringHashKey, nsIWeakReference> mCaches;
 273   nsClassHashtable<nsCStringHashKey, nsCString> mActiveCachesByGroup;
 274   nsCStringHashSet mActiveCaches;
 275 };
 276
 277 #endif // nsOfflineCacheDevice_h__