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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/ExecutionContext.h"
     38 #include "core/fileapi/FileError.h"
     39 #include "core/workers/WorkerGlobalScope.h"
     40 #include "modules/filesystem/FileSystemClient.h"
     41 #include "platform/AsyncFileSystemCallbacks.h"
     42 #include "public/platform/Platform.h"
     43 #include "public/platform/WebFileSystem.h"
     44 
     45 namespace WebCore {
     46 
     47 namespace {
     48 
     49 void fileSystemNotAllowed(ExecutionContext*, PassOwnPtr<AsyncFileSystemCallbacks> callbacks)
     50 {
     51     callbacks->didFail(FileError::ABORT_ERR);
     52 }
     53 
     54 } // namespace
     55 
     56 PassOwnPtr<LocalFileSystem> LocalFileSystem::create(PassOwnPtr<FileSystemClient> client)
     57 {
     58     return adoptPtr(new LocalFileSystem(client));
     59 }
     60 
     61 LocalFileSystem::~LocalFileSystem()
     62 {
     63 }
     64 
     65 void LocalFileSystem::resolveURL(ExecutionContext* context, const KURL& fileSystemURL, PassOwnPtr<AsyncFileSystemCallbacks> callbacks)
     66 {
     67     if (!client() || !client()->allowFileSystem(context)) {
     68         context->postTask(createCallbackTask(&fileSystemNotAllowed, callbacks));
     69         return;
     70     }
     71     blink::Platform::current()->fileSystem()->resolveURL(fileSystemURL, callbacks);
     72 }
     73 
     74 void LocalFileSystem::requestFileSystem(ExecutionContext* context, FileSystemType type, long long size, PassOwnPtr<AsyncFileSystemCallbacks> callbacks)
     75 {
     76     if (!client() || !client()->allowFileSystem(context)) {
     77         context->postTask(createCallbackTask(&fileSystemNotAllowed, callbacks));
     78         return;
     79     }
     80     KURL storagePartition = KURL(KURL(), context->securityOrigin()->toString());
     81     blink::Platform::current()->fileSystem()->openFileSystem(storagePartition, static_cast<blink::WebFileSystemType>(type), callbacks);
     82 }
     83 
     84 void LocalFileSystem::deleteFileSystem(ExecutionContext* context, FileSystemType type, PassOwnPtr<AsyncFileSystemCallbacks> callbacks)
     85 {
     86     ASSERT(context);
     87     ASSERT_WITH_SECURITY_IMPLICATION(context->isDocument());
     88 
     89     if (!client() || !client()->allowFileSystem(context)) {
     90         context->postTask(createCallbackTask(&fileSystemNotAllowed, callbacks));
     91         return;
     92     }
     93     KURL storagePartition = KURL(KURL(), context->securityOrigin()->toString());
     94     blink::Platform::current()->fileSystem()->deleteFileSystem(storagePartition, static_cast<blink::WebFileSystemType>(type), callbacks);
     95 }
     96 
     97 LocalFileSystem::LocalFileSystem(PassOwnPtr<FileSystemClient> client)
     98     : m_client(client)
     99 {
    100 }
    101 
    102 const char* LocalFileSystem::supplementName()
    103 {
    104     return "LocalFileSystem";
    105 }
    106 
    107 LocalFileSystem* LocalFileSystem::from(ExecutionContext* context)
    108 {
    109     if (context->isDocument()) {
    110         return static_cast<LocalFileSystem*>(Supplement<Page>::from(toDocument(context)->page(), supplementName()));
    111     }
    112     ASSERT(context->isWorkerGlobalScope());
    113     return static_cast<LocalFileSystem*>(Supplement<WorkerClients>::from(toWorkerGlobalScope(context)->clients(), supplementName()));
    114 }
    115 
    116 void provideLocalFileSystemTo(Page* page, PassOwnPtr<FileSystemClient> client)
    117 {
    118     page->provideSupplement(LocalFileSystem::supplementName(), LocalFileSystem::create(client));
    119 }
    120 
    121 void provideLocalFileSystemToWorker(WorkerClients* clients, PassOwnPtr<FileSystemClient> client)
    122 {
    123     clients->provideSupplement(LocalFileSystem::supplementName(), LocalFileSystem::create(client));
    124 }
    125 
    126 } // namespace WebCore
    127