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      1 /*
      2  * Copyright (C) 2013 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 #include "config.h"
     32 #include "modules/filesystem/LocalFileSystem.h"
     33 
     34 #include "core/dom/CrossThreadTask.h"
     35 #include "core/dom/Document.h"
     36 #include "core/dom/ExceptionCode.h"
     37 #include "core/dom/ScriptExecutionContext.h"
     38 #include "core/fileapi/FileError.h"
     39 #include "core/page/Page.h"
     40 #include "core/platform/AsyncFileSystemCallbacks.h"
     41 #include "modules/filesystem/FileSystemClient.h"
     42 #include "modules/filesystem/WorkerLocalFileSystem.h"
     43 
     44 namespace WebCore {
     45 
     46 namespace {
     47 
     48 void fileSystemNotAllowed(ScriptExecutionContext*, PassOwnPtr<AsyncFileSystemCallbacks> callbacks)
     49 {
     50     callbacks->didFail(FileError::ABORT_ERR);
     51 }
     52 
     53 } // namespace
     54 
     55 LocalFileSystemBase::~LocalFileSystemBase()
     56 {
     57 }
     58 
     59 void LocalFileSystemBase::readFileSystem(ScriptExecutionContext* context, FileSystemType type, PassOwnPtr<AsyncFileSystemCallbacks> callbacks, FileSystemSynchronousType synchronousType)
     60 {
     61     if (!client() || !client()->allowFileSystem(context)) {
     62         context->postTask(createCallbackTask(&fileSystemNotAllowed, callbacks));
     63         return;
     64     }
     65     client()->openFileSystem(context, type, callbacks, synchronousType, 0, OpenExistingFileSystem);
     66 }
     67 
     68 void LocalFileSystemBase::requestFileSystem(ScriptExecutionContext* context, FileSystemType type, long long size, PassOwnPtr<AsyncFileSystemCallbacks> callbacks, FileSystemSynchronousType synchronousType)
     69 {
     70     if (!client() || !client()->allowFileSystem(context)) {
     71         context->postTask(createCallbackTask(&fileSystemNotAllowed, callbacks));
     72         return;
     73     }
     74     client()->openFileSystem(context, type, callbacks, synchronousType, size, CreateFileSystemIfNotPresent);
     75 }
     76 
     77 void LocalFileSystemBase::deleteFileSystem(ScriptExecutionContext* context, FileSystemType type, PassOwnPtr<AsyncFileSystemCallbacks> callbacks)
     78 {
     79     ASSERT(context);
     80     ASSERT_WITH_SECURITY_IMPLICATION(context->isDocument());
     81 
     82     if (!client() || !client()->allowFileSystem(context)) {
     83         context->postTask(createCallbackTask(&fileSystemNotAllowed, callbacks));
     84         return;
     85     }
     86     client()->deleteFileSystem(context, type, callbacks);
     87 }
     88 
     89 LocalFileSystemBase::LocalFileSystemBase(PassOwnPtr<FileSystemClient> client)
     90     : m_client(client)
     91 {
     92 }
     93 
     94 PassOwnPtr<LocalFileSystem> LocalFileSystem::create(PassOwnPtr<FileSystemClient> client)
     95 {
     96     return adoptPtr(new LocalFileSystem(client));
     97 }
     98 
     99 const char* LocalFileSystem::supplementName()
    100 {
    101     return "LocalFileSystem";
    102 }
    103 
    104 LocalFileSystem::LocalFileSystem(PassOwnPtr<FileSystemClient> client)
    105     : LocalFileSystemBase(client)
    106 {
    107 }
    108 
    109 LocalFileSystem::~LocalFileSystem()
    110 {
    111 }
    112 
    113 LocalFileSystem* LocalFileSystem::from(ScriptExecutionContext* context)
    114 {
    115     return static_cast<LocalFileSystem*>(Supplement<Page>::from(toDocument(context)->page(), supplementName()));
    116 }
    117 
    118 void provideLocalFileSystemTo(Page* page, PassOwnPtr<FileSystemClient> client)
    119 {
    120     LocalFileSystem::provideTo(page, LocalFileSystem::supplementName(), LocalFileSystem::create(client));
    121 }
    122 
    123 } // namespace WebCore
    124