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31 #ifndef WebStorageNamespace_h
32 #define WebStorageNamespace_h
34 #include "WebCommon.h"
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 {
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_EXPORT static WebStorageNamespace* createLocalStorageNamespace(const WebString& backingDirectoryPath, unsigned quota);
51 WEBKIT_EXPORT static WebStorageNamespace* createSessionStorageNamespace(unsigned quota);
53 // The quota for each storage area. Suggested by the spec.
54 static const unsigned m_localStorageQuota = 5 * 1024 * 1024;
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;
61 static const unsigned noQuota = UINT_MAX;
63 virtual ~WebStorageNamespace() { }
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;
70 // Copy a StorageNamespace. This only makes sense in the case of SessionStorage.
71 virtual WebStorageNamespace* copy() = 0;
73 // Shutdown the StorageNamespace. Write all StorageArea's to disk and disallow new
75 virtual void close() = 0;
80 #endif // WebStorageNamespace_h