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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/core/v8/ExceptionState.h"
     33 #include "bindings/modules/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/IDBHistograms.h"
     39 #include "modules/indexeddb/IDBKey.h"
     40 #include "modules/indexeddb/IDBTracing.h"
     41 #include "modules/indexeddb/IndexedDBClient.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 blink {
     50 
     51 static const char permissionDeniedErrorMessage[] = "The user denied permission to access the database.";
     52 
     53 IDBFactory::IDBFactory(IndexedDBClient* permissionClient)
     54     : m_permissionClient(permissionClient)
     55 {
     56 }
     57 
     58 void IDBFactory::trace(Visitor* visitor)
     59 {
     60     visitor->trace(m_permissionClient);
     61 }
     62 
     63 static bool isContextValid(ExecutionContext* context)
     64 {
     65     ASSERT(context->isDocument() || context->isWorkerGlobalScope());
     66     if (context->isDocument()) {
     67         Document* document = toDocument(context);
     68         return document->frame() && document->page();
     69     }
     70     return true;
     71 }
     72 
     73 IDBRequest* IDBFactory::getDatabaseNames(ScriptState* scriptState, ExceptionState& exceptionState)
     74 {
     75     IDB_TRACE("IDBFactory::getDatabaseNames");
     76     if (!isContextValid(scriptState->executionContext()))
     77         return nullptr;
     78     if (!scriptState->executionContext()->securityOrigin()->canAccessDatabase()) {
     79         exceptionState.throwSecurityError("access to the Indexed Database API is denied in this context.");
     80         return 0;
     81     }
     82 
     83     IDBRequest* request = IDBRequest::create(scriptState, IDBAny::createNull(), 0);
     84 
     85     if (!m_permissionClient->allowIndexedDB(scriptState->executionContext(), "Database Listing")) {
     86         request->onError(DOMError::create(UnknownError, permissionDeniedErrorMessage));
     87         return request;
     88     }
     89 
     90     Platform::current()->idbFactory()->getDatabaseNames(WebIDBCallbacksImpl::create(request).leakPtr(), createDatabaseIdentifierFromSecurityOrigin(scriptState->executionContext()->securityOrigin()));
     91     return request;
     92 }
     93 
     94 IDBOpenDBRequest* IDBFactory::open(ScriptState* scriptState, const String& name, unsigned long long version, ExceptionState& exceptionState)
     95 {
     96     IDB_TRACE("IDBFactory::open");
     97     if (!version) {
     98         exceptionState.throwTypeError("The version provided must not be 0.");
     99         return 0;
    100     }
    101     return openInternal(scriptState, name, version, exceptionState);
    102 }
    103 
    104 IDBOpenDBRequest* IDBFactory::openInternal(ScriptState* scriptState, const String& name, int64_t version, ExceptionState& exceptionState)
    105 {
    106     Platform::current()->histogramEnumeration("WebCore.IndexedDB.FrontEndAPICalls", IDBOpenCall, IDBMethodsMax);
    107     ASSERT(version >= 1 || version == IDBDatabaseMetadata::NoIntVersion);
    108     if (name.isNull()) {
    109         exceptionState.throwTypeError("The name provided must not be empty.");
    110         return 0;
    111     }
    112     if (!isContextValid(scriptState->executionContext()))
    113         return nullptr;
    114     if (!scriptState->executionContext()->securityOrigin()->canAccessDatabase()) {
    115         exceptionState.throwSecurityError("access to the Indexed Database API is denied in this context.");
    116         return 0;
    117     }
    118 
    119     IDBDatabaseCallbacks* databaseCallbacks = IDBDatabaseCallbacks::create();
    120     int64_t transactionId = IDBDatabase::nextTransactionId();
    121     IDBOpenDBRequest* request = IDBOpenDBRequest::create(scriptState, databaseCallbacks, transactionId, version);
    122 
    123     if (!m_permissionClient->allowIndexedDB(scriptState->executionContext(), name)) {
    124         request->onError(DOMError::create(UnknownError, permissionDeniedErrorMessage));
    125         return request;
    126     }
    127 
    128     Platform::current()->idbFactory()->open(name, version, transactionId, WebIDBCallbacksImpl::create(request).leakPtr(), WebIDBDatabaseCallbacksImpl::create(databaseCallbacks).leakPtr(), createDatabaseIdentifierFromSecurityOrigin(scriptState->executionContext()->securityOrigin()));
    129     return request;
    130 }
    131 
    132 IDBOpenDBRequest* IDBFactory::open(ScriptState* scriptState, const String& name, ExceptionState& exceptionState)
    133 {
    134     IDB_TRACE("IDBFactory::open");
    135     return openInternal(scriptState, name, IDBDatabaseMetadata::NoIntVersion, exceptionState);
    136 }
    137 
    138 IDBOpenDBRequest* IDBFactory::deleteDatabase(ScriptState* scriptState, const String& name, ExceptionState& exceptionState)
    139 {
    140     IDB_TRACE("IDBFactory::deleteDatabase");
    141     Platform::current()->histogramEnumeration("WebCore.IndexedDB.FrontEndAPICalls", IDBDeleteDatabaseCall, IDBMethodsMax);
    142     if (name.isNull()) {
    143         exceptionState.throwTypeError("The name provided must not be empty.");
    144         return 0;
    145     }
    146     if (!isContextValid(scriptState->executionContext()))
    147         return nullptr;
    148     if (!scriptState->executionContext()->securityOrigin()->canAccessDatabase()) {
    149         exceptionState.throwSecurityError("access to the Indexed Database API is denied in this context.");
    150         return 0;
    151     }
    152 
    153     IDBOpenDBRequest* request = IDBOpenDBRequest::create(scriptState, nullptr, 0, IDBDatabaseMetadata::DefaultIntVersion);
    154 
    155     if (!m_permissionClient->allowIndexedDB(scriptState->executionContext(), name)) {
    156         request->onError(DOMError::create(UnknownError, permissionDeniedErrorMessage));
    157         return request;
    158     }
    159 
    160     Platform::current()->idbFactory()->deleteDatabase(name, WebIDBCallbacksImpl::create(request).leakPtr(), createDatabaseIdentifierFromSecurityOrigin(scriptState->executionContext()->securityOrigin()));
    161     return request;
    162 }
    163 
    164 short IDBFactory::cmp(ScriptState* scriptState, const ScriptValue& firstValue, const ScriptValue& secondValue, ExceptionState& exceptionState)
    165 {
    166     IDBKey* first = scriptValueToIDBKey(scriptState->isolate(), firstValue);
    167     IDBKey* second = scriptValueToIDBKey(scriptState->isolate(), secondValue);
    168 
    169     ASSERT(first);
    170     ASSERT(second);
    171 
    172     if (!first->isValid() || !second->isValid()) {
    173         exceptionState.throwDOMException(DataError, IDBDatabase::notValidKeyErrorMessage);
    174         return 0;
    175     }
    176 
    177     return static_cast<short>(first->compare(second));
    178 }
    179 
    180 } // namespace blink
    181