chrome_blob_storage_context.cc revision cedac228d2dd51db4b79ea1e72c7f249408ee061 
1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "content/browser/fileapi/chrome_blob_storage_context.h"
6
7#include "base/bind.h"
8#include "base/guid.h"
9#include "content/public/browser/blob_handle.h"
10#include "content/public/browser/browser_context.h"
11#include "content/public/browser/browser_thread.h"
12#include "webkit/browser/blob/blob_data_handle.h"
13#include "webkit/browser/blob/blob_storage_context.h"
14
15using base::UserDataAdapter;
16using webkit_blob::BlobStorageContext;
17
18namespace content {
19
20namespace {
21
22class BlobHandleImpl : public BlobHandle {
23 public:
24  BlobHandleImpl(scoped_ptr<webkit_blob::BlobDataHandle> handle)
25      : handle_(handle.Pass()) {
26  }
27
28  virtual ~BlobHandleImpl() {}
29
30  virtual std::string GetUUID() OVERRIDE {
31    return handle_->uuid();
32  }
33
34 private:
35  scoped_ptr<webkit_blob::BlobDataHandle> handle_;
36};
37
38}  // namespace
39
40static const char* kBlobStorageContextKeyName = "content_blob_storage_context";
41
42ChromeBlobStorageContext::ChromeBlobStorageContext() {}
43
44ChromeBlobStorageContext* ChromeBlobStorageContext::GetFor(
45    BrowserContext* context) {
46  if (!context->GetUserData(kBlobStorageContextKeyName)) {
47    scoped_refptr<ChromeBlobStorageContext> blob =
48        new ChromeBlobStorageContext();
49    context->SetUserData(
50        kBlobStorageContextKeyName,
51        new UserDataAdapter<ChromeBlobStorageContext>(blob.get()));
52    // Check first to avoid memory leak in unittests.
53    if (BrowserThread::IsMessageLoopValid(BrowserThread::IO)) {
54      BrowserThread::PostTask(
55          BrowserThread::IO, FROM_HERE,
56          base::Bind(&ChromeBlobStorageContext::InitializeOnIOThread, blob));
57    }
58  }
59
60  return UserDataAdapter<ChromeBlobStorageContext>::Get(
61      context, kBlobStorageContextKeyName);
62}
63
64void ChromeBlobStorageContext::InitializeOnIOThread() {
65  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
66  context_.reset(new BlobStorageContext());
67}
68
69scoped_ptr<BlobHandle> ChromeBlobStorageContext::CreateMemoryBackedBlob(
70    const char* data, size_t length) {
71  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
72
73  std::string uuid(base::GenerateGUID());
74  scoped_refptr<webkit_blob::BlobData> blob_data =
75      new webkit_blob::BlobData(uuid);
76  blob_data->AppendData(data, length);
77
78  scoped_ptr<webkit_blob::BlobDataHandle> blob_data_handle =
79      context_->AddFinishedBlob(blob_data.get());
80  if (!blob_data_handle)
81    return scoped_ptr<BlobHandle>();
82
83  scoped_ptr<BlobHandle> blob_handle(
84      new BlobHandleImpl(blob_data_handle.Pass()));
85  return blob_handle.Pass();
86}
87
88ChromeBlobStorageContext::~ChromeBlobStorageContext() {}
89
90void ChromeBlobStorageContext::DeleteOnCorrectThread() const {
91  if (BrowserThread::IsMessageLoopValid(BrowserThread::IO) &&
92      !BrowserThread::CurrentlyOn(BrowserThread::IO)) {
93    BrowserThread::DeleteSoon(BrowserThread::IO, FROM_HERE, this);
94    return;
95  }
96  delete this;
97}
98
99}  // namespace content
100