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      1 /*
      2  * Copyright (C) 2010 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
      6  * are met:
      7  *
      8  * 1.  Redistributions of source code must retain the above copyright
      9  *     notice, this list of conditions and the following disclaimer.
     10  * 2.  Redistributions in binary form must reproduce the above copyright
     11  *     notice, this list of conditions and the following disclaimer in the
     12  *     documentation and/or other materials provided with the distribution.
     13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
     14  *     its contributors may be used to endorse or promote products derived
     15  *     from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #include "config.h"
     30 #include "modules/indexeddb/IDBFactory.h"
     31 
     32 #include "bindings/v8/ExceptionState.h"
     33 #include "bindings/v8/IDBBindingUtilities.h"
     34 #include "core/dom/Document.h"
     35 #include "core/dom/ExceptionCode.h"
     36 #include "modules/indexeddb/IDBDatabase.h"
     37 #include "modules/indexeddb/IDBDatabaseCallbacks.h"
     38 #include "modules/indexeddb/IDBFactoryBackendInterface.h"
     39 #include "modules/indexeddb/IDBHistograms.h"
     40 #include "modules/indexeddb/IDBKey.h"
     41 #include "modules/indexeddb/IDBTracing.h"
     42 #include "modules/indexeddb/WebIDBCallbacksImpl.h"
     43 #include "modules/indexeddb/WebIDBDatabaseCallbacksImpl.h"
     44 #include "platform/weborigin/DatabaseIdentifier.h"
     45 #include "platform/weborigin/SecurityOrigin.h"
     46 #include "public/platform/Platform.h"
     47 #include "public/platform/WebIDBFactory.h"
     48 
     49 namespace WebCore {
     50 
     51 static const char permissionDeniedErrorMessage[] = "The user denied permission to access the database.";
     52 
     53 IDBFactory::IDBFactory(IDBFactoryBackendInterface* permissionClient)
     54     : m_permissionClient(permissionClient)
     55 {
     56     // We pass a reference to this object before it can be adopted.
     57     relaxAdoptionRequirement();
     58     ScriptWrappable::init(this);
     59 }
     60 
     61 IDBFactory::~IDBFactory()
     62 {
     63 }
     64 
     65 static bool isContextValid(ExecutionContext* context)
     66 {
     67     ASSERT(context->isDocument() || context->isWorkerGlobalScope());
     68     if (context->isDocument()) {
     69         Document* document = toDocument(context);
     70         return document->frame() && document->page();
     71     }
     72     return true;
     73 }
     74 
     75 PassRefPtr<IDBRequest> IDBFactory::getDatabaseNames(ExecutionContext* context, ExceptionState& exceptionState)
     76 {
     77     IDB_TRACE("IDBFactory::getDatabaseNames");
     78     if (!isContextValid(context))
     79         return 0;
     80     if (!context->securityOrigin()->canAccessDatabase()) {
     81         exceptionState.throwSecurityError("access to the Indexed Database API is denied in this context.");
     82         return 0;
     83     }
     84 
     85     RefPtr<IDBRequest> request = IDBRequest::create(context, IDBAny::createNull(), 0);
     86 
     87     if (!m_permissionClient->allowIndexedDB(context, "Database Listing")) {
     88         request->onError(DOMError::create(UnknownError, permissionDeniedErrorMessage));
     89         return request;
     90     }
     91 
     92     blink::Platform::current()->idbFactory()->getDatabaseNames(WebIDBCallbacksImpl::create(request).leakPtr(), createDatabaseIdentifierFromSecurityOrigin(context->securityOrigin()));
     93     return request;
     94 }
     95 
     96 PassRefPtr<IDBOpenDBRequest> IDBFactory::open(ExecutionContext* context, const String& name, unsigned long long version, ExceptionState& exceptionState)
     97 {
     98     IDB_TRACE("IDBFactory::open");
     99     if (!version) {
    100         exceptionState.throwUninformativeAndGenericTypeError();
    101         return 0;
    102     }
    103     return openInternal(context, name, version, exceptionState);
    104 }
    105 
    106 PassRefPtr<IDBOpenDBRequest> IDBFactory::openInternal(ExecutionContext* context, const String& name, int64_t version, ExceptionState& exceptionState)
    107 {
    108     blink::Platform::current()->histogramEnumeration("WebCore.IndexedDB.FrontEndAPICalls", IDBOpenCall, IDBMethodsMax);
    109     ASSERT(version >= 1 || version == IDBDatabaseMetadata::NoIntVersion);
    110     if (name.isNull()) {
    111         exceptionState.throwUninformativeAndGenericTypeError();
    112         return 0;
    113     }
    114     if (!isContextValid(context))
    115         return 0;
    116     if (!context->securityOrigin()->canAccessDatabase()) {
    117         exceptionState.throwSecurityError("access to the Indexed Database API is denied in this context.");
    118         return 0;
    119     }
    120 
    121     RefPtr<IDBDatabaseCallbacks> databaseCallbacks = IDBDatabaseCallbacks::create();
    122     int64_t transactionId = IDBDatabase::nextTransactionId();
    123     RefPtr<IDBOpenDBRequest> request = IDBOpenDBRequest::create(context, databaseCallbacks, transactionId, version);
    124 
    125     if (!m_permissionClient->allowIndexedDB(context, name)) {
    126         request->onError(DOMError::create(UnknownError, permissionDeniedErrorMessage));
    127         return request;
    128     }
    129 
    130     blink::Platform::current()->idbFactory()->open(name, version, transactionId, WebIDBCallbacksImpl::create(request).leakPtr(), WebIDBDatabaseCallbacksImpl::create(databaseCallbacks.release()).leakPtr(), createDatabaseIdentifierFromSecurityOrigin(context->securityOrigin()));
    131     return request;
    132 }
    133 
    134 PassRefPtr<IDBOpenDBRequest> IDBFactory::open(ExecutionContext* context, const String& name, ExceptionState& exceptionState)
    135 {
    136     IDB_TRACE("IDBFactory::open");
    137     return openInternal(context, name, IDBDatabaseMetadata::NoIntVersion, exceptionState);
    138 }
    139 
    140 PassRefPtr<IDBOpenDBRequest> IDBFactory::deleteDatabase(ExecutionContext* context, const String& name, ExceptionState& exceptionState)
    141 {
    142     IDB_TRACE("IDBFactory::deleteDatabase");
    143     blink::Platform::current()->histogramEnumeration("WebCore.IndexedDB.FrontEndAPICalls", IDBDeleteDatabaseCall, IDBMethodsMax);
    144     if (name.isNull()) {
    145         exceptionState.throwUninformativeAndGenericTypeError();
    146         return 0;
    147     }
    148     if (!isContextValid(context))
    149         return 0;
    150     if (!context->securityOrigin()->canAccessDatabase()) {
    151         exceptionState.throwSecurityError("access to the Indexed Database API is denied in this context.");
    152         return 0;
    153     }
    154 
    155     RefPtr<IDBOpenDBRequest> request = IDBOpenDBRequest::create(context, 0, 0, IDBDatabaseMetadata::DefaultIntVersion);
    156 
    157     if (!m_permissionClient->allowIndexedDB(context, name)) {
    158         request->onError(DOMError::create(UnknownError, permissionDeniedErrorMessage));
    159         return request;
    160     }
    161 
    162     blink::Platform::current()->idbFactory()->deleteDatabase(name, WebIDBCallbacksImpl::create(request).leakPtr(), createDatabaseIdentifierFromSecurityOrigin(context->securityOrigin()));
    163     return request;
    164 }
    165 
    166 short IDBFactory::cmp(ExecutionContext* context, const ScriptValue& firstValue, const ScriptValue& secondValue, ExceptionState& exceptionState)
    167 {
    168     DOMRequestState requestState(context);
    169     RefPtr<IDBKey> first = scriptValueToIDBKey(&requestState, firstValue);
    170     RefPtr<IDBKey> second = scriptValueToIDBKey(&requestState, secondValue);
    171 
    172     ASSERT(first);
    173     ASSERT(second);
    174 
    175     if (!first->isValid() || !second->isValid()) {
    176         exceptionState.throwDOMException(DataError, IDBDatabase::notValidKeyErrorMessage);
    177         return 0;
    178     }
    179 
    180     return static_cast<short>(first->compare(second.get()));
    181 }
    182 
    183 } // namespace WebCore
    184