1 /* 2 * Copyright (C) 2009 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #ifndef WebStorageNamespace_h 32 #define WebStorageNamespace_h 33 34 #include "WebCommon.h" 35 36 namespace WebKit { 37 38 class WebStorageArea; 39 class WebString; 40 41 // WebStorageNamespace represents a collection of StorageAreas. Typically, you'll have 42 // multiple StorageNamespaces to represent the SessionStorage for each tab and a single 43 // StorageNamespace to represent LocalStorage for the entire browser. 44 class WebStorageNamespace { 45 public: 46 // Create a new WebStorageNamespace. LocalStorageNamespaces require a path to specify 47 // where the SQLite databases that make LocalStorage data persistent are located. 48 // If path is empty, data will not persist. You should call delete on the returned 49 // object when you're finished. 50 WEBKIT_API static WebStorageNamespace* createLocalStorageNamespace(const WebString& backingDirectoryPath, unsigned quota); 51 WEBKIT_API static WebStorageNamespace* createSessionStorageNamespace(unsigned quota); 52 53 // The quota for each storage area. Suggested by the spec. 54 static const unsigned m_localStorageQuota = 5 * 1024 * 1024; 55 56 // Since SessionStorage memory is allocated in the browser process, we place a 57 // per-origin quota on it. Like LocalStorage there are known attacks against 58 // this, so it's more of a sanity check than a real security measure. 59 static const unsigned m_sessionStorageQuota = 5 * 1024 * 1024; 60 61 static const unsigned noQuota = UINT_MAX; 62 63 virtual ~WebStorageNamespace() { } 64 65 // Create a new WebStorageArea object. Two subsequent calls with the same origin 66 // will return two different WebStorageArea objects that share the same backing store. 67 // You should call delete on the returned object when you're finished. 68 virtual WebStorageArea* createStorageArea(const WebString& origin) = 0; 69 70 // Copy a StorageNamespace. This only makes sense in the case of SessionStorage. 71 virtual WebStorageNamespace* copy() = 0; 72 73 // Shutdown the StorageNamespace. Write all StorageArea's to disk and disallow new 74 // write activity. 75 virtual void close() = 0; 76 }; 77 78 } // namespace WebKit 79 80 #endif // WebStorageNamespace_h 81
