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// Copyright 2013 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/child/webblobregistry_impl.h"
#include "base/bind.h"
#include "base/files/file_path.h"
#include "base/guid.h"
#include "base/location.h"
#include "base/memory/ref_counted.h"
#include "base/memory/shared_memory.h"
#include "base/message_loop/message_loop.h"
#include "base/numerics/safe_conversions.h"
#include "base/trace_event/trace_event.h"
#include "content/child/blob_storage/blob_consolidation.h"
#include "content/child/blob_storage/blob_transport_controller.h"
#include "content/child/child_thread_impl.h"
#include "content/child/thread_safe_sender.h"
#include "content/common/fileapi/webblob_messages.h"
#include "storage/common/blob_storage/blob_storage_constants.h"
#include "third_party/WebKit/public/platform/FilePathConversion.h"
#include "third_party/WebKit/public/platform/WebBlobData.h"
#include "third_party/WebKit/public/platform/WebString.h"
#include "third_party/WebKit/public/platform/WebThreadSafeData.h"
#include "third_party/WebKit/public/platform/WebURL.h"
using blink::WebBlobData;
using blink::WebString;
using blink::WebThreadSafeData;
using blink::WebURL;
using blink::WebBlobRegistry;
using storage::DataElement;
namespace content {
WebBlobRegistryImpl::WebBlobRegistryImpl(
scoped_refptr<base::SingleThreadTaskRunner> io_runner,
scoped_refptr<base::SingleThreadTaskRunner> main_runner,
scoped_refptr<ThreadSafeSender> sender)
: io_runner_(std::move(io_runner)),
main_runner_(std::move(main_runner)),
sender_(std::move(sender)) {
// Record a dummy trace event on startup so the 'Storage' category shows up
// in the chrome://tracing viewer.
TRACE_EVENT0("Blob", "Init");
}
WebBlobRegistryImpl::~WebBlobRegistryImpl() {
}
blink::WebBlobRegistry::Builder* WebBlobRegistryImpl::createBuilder(
const blink::WebString& uuid,
const blink::WebString& content_type) {
return new BuilderImpl(uuid, content_type, sender_.get(), io_runner_,
main_runner_);
}
void WebBlobRegistryImpl::registerBlobData(const blink::WebString& uuid,
const blink::WebBlobData& data) {
TRACE_EVENT0("Blob", "Registry::RegisterBlob");
std::unique_ptr<Builder> builder(createBuilder(uuid, data.contentType()));
// This is temporary until we move to createBuilder() as our blob creation
// method.
size_t i = 0;
WebBlobData::Item data_item;
while (data.itemAt(i++, data_item)) {
if (data_item.length == 0) {
continue;
}
switch (data_item.type) {
case WebBlobData::Item::TypeData: {
// WebBlobData does not allow partial data items.
DCHECK(!data_item.offset && data_item.length == -1);
builder->appendData(data_item.data);
break;
}
case WebBlobData::Item::TypeFile:
builder->appendFile(data_item.filePath,
static_cast<uint64_t>(data_item.offset),
static_cast<uint64_t>(data_item.length),
data_item.expectedModificationTime);
break;
case WebBlobData::Item::TypeBlob:
builder->appendBlob(data_item.blobUUID, data_item.offset,
data_item.length);
break;
case WebBlobData::Item::TypeFileSystemURL:
// We only support filesystem URL as of now.
DCHECK(GURL(data_item.fileSystemURL).SchemeIsFileSystem());
builder->appendFileSystemURL(data_item.fileSystemURL,
static_cast<uint64_t>(data_item.offset),
static_cast<uint64_t>(data_item.length),
data_item.expectedModificationTime);
break;
default:
NOTREACHED();
}
}
builder->build();
}
void WebBlobRegistryImpl::addBlobDataRef(const WebString& uuid) {
sender_->Send(new BlobHostMsg_IncrementRefCount(uuid.utf8()));
}
void WebBlobRegistryImpl::removeBlobDataRef(const WebString& uuid) {
sender_->Send(new BlobHostMsg_DecrementRefCount(uuid.utf8()));
}
void WebBlobRegistryImpl::registerPublicBlobURL(const WebURL& url,
const WebString& uuid) {
sender_->Send(new BlobHostMsg_RegisterPublicURL(url, uuid.utf8()));
}
void WebBlobRegistryImpl::revokePublicBlobURL(const WebURL& url) {
sender_->Send(new BlobHostMsg_RevokePublicURL(url));
}
// ------ streams stuff -----
void WebBlobRegistryImpl::registerStreamURL(const WebURL& url,
const WebString& content_type) {
DCHECK(ChildThreadImpl::current());
sender_->Send(new StreamHostMsg_StartBuilding(url, content_type.utf8()));
}
void WebBlobRegistryImpl::registerStreamURL(const WebURL& url,
const WebURL& src_url) {
DCHECK(ChildThreadImpl::current());
sender_->Send(new StreamHostMsg_Clone(url, src_url));
}
void WebBlobRegistryImpl::addDataToStream(const WebURL& url,
const char* data,
size_t length) {
DCHECK(ChildThreadImpl::current());
if (length == 0)
return;
if (length < storage::kBlobStorageIPCThresholdBytes) {
DataElement item;
item.SetToBytes(data, length);
sender_->Send(new StreamHostMsg_AppendBlobDataItem(url, item));
} else {
// We handle larger amounts of data via SharedMemory instead of
// writing it directly to the IPC channel.
size_t shared_memory_size =
std::min(length, storage::kBlobStorageMaxSharedMemoryBytes);
std::unique_ptr<base::SharedMemory> shared_memory(
ChildThreadImpl::AllocateSharedMemory(shared_memory_size, sender_.get(),
nullptr));
CHECK(shared_memory.get());
if (!shared_memory->Map(shared_memory_size))
CHECK(false);
size_t remaining_bytes = length;
const char* current_ptr = data;
while (remaining_bytes) {
size_t chunk_size = std::min(remaining_bytes, shared_memory_size);
memcpy(shared_memory->memory(), current_ptr, chunk_size);
sender_->Send(new StreamHostMsg_SyncAppendSharedMemory(
url, shared_memory->handle(),
base::checked_cast<uint32_t>(chunk_size)));
remaining_bytes -= chunk_size;
current_ptr += chunk_size;
}
}
}
void WebBlobRegistryImpl::flushStream(const WebURL& url) {
DCHECK(ChildThreadImpl::current());
sender_->Send(new StreamHostMsg_Flush(url));
}
void WebBlobRegistryImpl::finalizeStream(const WebURL& url) {
DCHECK(ChildThreadImpl::current());
sender_->Send(new StreamHostMsg_FinishBuilding(url));
}
void WebBlobRegistryImpl::abortStream(const WebURL& url) {
DCHECK(ChildThreadImpl::current());
sender_->Send(new StreamHostMsg_AbortBuilding(url));
}
void WebBlobRegistryImpl::unregisterStreamURL(const WebURL& url) {
DCHECK(ChildThreadImpl::current());
sender_->Send(new StreamHostMsg_Remove(url));
}
WebBlobRegistryImpl::BuilderImpl::BuilderImpl(
const blink::WebString& uuid,
const blink::WebString& content_type,
ThreadSafeSender* sender,
scoped_refptr<base::SingleThreadTaskRunner> io_runner,
scoped_refptr<base::SingleThreadTaskRunner> main_runner)
: uuid_(uuid.utf8()),
content_type_(content_type.utf8()),
consolidation_(new BlobConsolidation()),
sender_(sender),
io_runner_(std::move(io_runner)),
main_runner_(std::move(main_runner)) {}
WebBlobRegistryImpl::BuilderImpl::~BuilderImpl() {
}
void WebBlobRegistryImpl::BuilderImpl::appendData(
const WebThreadSafeData& data) {
consolidation_->AddDataItem(data);
}
void WebBlobRegistryImpl::BuilderImpl::appendBlob(const WebString& uuid,
uint64_t offset,
uint64_t length) {
consolidation_->AddBlobItem(uuid.utf8(), offset, length);
}
void WebBlobRegistryImpl::BuilderImpl::appendFile(
const WebString& path,
uint64_t offset,
uint64_t length,
double expected_modification_time) {
consolidation_->AddFileItem(blink::WebStringToFilePath(path), offset, length,
expected_modification_time);
}
void WebBlobRegistryImpl::BuilderImpl::appendFileSystemURL(
const WebURL& fileSystemURL,
uint64_t offset,
uint64_t length,
double expected_modification_time) {
DCHECK(GURL(fileSystemURL).SchemeIsFileSystem());
consolidation_->AddFileSystemItem(GURL(fileSystemURL), offset, length,
expected_modification_time);
}
void WebBlobRegistryImpl::BuilderImpl::build() {
BlobTransportController::InitiateBlobTransfer(
uuid_, content_type_, std::move(consolidation_), sender_,
io_runner_.get(), main_runner_);
}
} // namespace content
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