[BlobAsync] Asynchronous Blob Construction Final Patch

content/browser/fileapi/blob_storage_host.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "content/browser/fileapi/blob_storage_host.h"
-
-#include "base/sequenced_task_runner.h"
-#include "base/strings/string_util.h"
-#include "storage/browser/blob/blob_storage_context.h"
-#include "url/gurl.h"
-
-using storage::BlobStorageContext;
-
-namespace content {
-
-BlobStorageHost::BlobStorageHost(BlobStorageContext* context)
-    : context_(context->AsWeakPtr()) {
-}
-
-BlobStorageHost::~BlobStorageHost() {
-  if (!context_.get())
-    return;
-  for (std::set<GURL>::iterator iter = public_blob_urls_.begin();
-       iter != public_blob_urls_.end(); ++iter) {
-    context_->RevokePublicBlobURL(*iter);
-  }
-  for (BlobReferenceMap::iterator iter = blobs_inuse_map_.begin();
-       iter != blobs_inuse_map_.end(); ++iter) {
-    for (int i = 0; i < iter->second; ++i)
-      context_->DecrementBlobRefCount(iter->first);
-  }
-}
-
-bool BlobStorageHost::StartBuildingBlob(const std::string& uuid) {
-  if (!context_.get() || uuid.empty() || context_->IsInUse(uuid))
-    return false;
-  context_->StartBuildingBlob(uuid);
-  blobs_inuse_map_[uuid] = 1;
-  return true;
-}
-
-bool BlobStorageHost::AppendBlobDataItem(
-    const std::string& uuid,
-    const storage::DataElement& data_item) {
-  if (!context_.get() || !IsBeingBuiltInHost(uuid))
-    return false;
-  context_->AppendBlobDataItem(uuid, data_item);
-  return true;
-}
-
-bool BlobStorageHost::CancelBuildingBlob(const std::string& uuid) {
-  if (!context_.get() || !IsBeingBuiltInHost(uuid))
-    return false;
-  blobs_inuse_map_.erase(uuid);
-  context_->CancelBuildingBlob(uuid);
-  return true;
-}
-
-bool BlobStorageHost::FinishBuildingBlob(
-    const std::string& uuid, const std::string& content_type) {
-  if (!context_.get() || !IsBeingBuiltInHost(uuid))
-    return false;
-  context_->FinishBuildingBlob(uuid, content_type);
-  return true;
-}
-
-bool BlobStorageHost::IncrementBlobRefCount(const std::string& uuid) {
-  if (!context_.get() || !context_->IsInUse(uuid) ||
-      context_->IsBeingBuilt(uuid))
-    return false;
-  context_->IncrementBlobRefCount(uuid);
-  blobs_inuse_map_[uuid] += 1;
-  return true;
-}
-
-bool BlobStorageHost::DecrementBlobRefCount(const std::string& uuid) {
-  if (!context_.get() || !IsInUseInHost(uuid))
-    return false;
-  context_->DecrementBlobRefCount(uuid);
-  blobs_inuse_map_[uuid] -= 1;
-  if (blobs_inuse_map_[uuid] == 0)
-    blobs_inuse_map_.erase(uuid);
-  return true;
-}
-
-bool BlobStorageHost::RegisterPublicBlobURL(
-    const GURL& blob_url, const std::string& uuid) {
-  if (!context_.get() || !IsInUseInHost(uuid) ||
-      context_->IsUrlRegistered(blob_url))
-    return false;
-  context_->RegisterPublicBlobURL(blob_url, uuid);
-  public_blob_urls_.insert(blob_url);
-  return true;
-}
-
-bool BlobStorageHost::RevokePublicBlobURL(const GURL& blob_url) {
-  if (!context_.get() || !IsUrlRegisteredInHost(blob_url))
-    return false;
-  context_->RevokePublicBlobURL(blob_url);
-  public_blob_urls_.erase(blob_url);
-  return true;
-}
-
-bool BlobStorageHost::IsInUseInHost(const std::string& uuid) {
-  return blobs_inuse_map_.find(uuid) != blobs_inuse_map_.end();
-}
-
-bool BlobStorageHost::IsBeingBuiltInHost(const std::string& uuid) {
-  return IsInUseInHost(uuid) && context_->IsBeingBuilt(uuid);
-}
-
-bool BlobStorageHost::IsUrlRegisteredInHost(const GURL& blob_url) {
-  return public_blob_urls_.find(blob_url) != public_blob_urls_.end();
-}
-
-}  // namespace content