137 lines
4 KiB
C++
137 lines
4 KiB
C++
// Copyright (c) 2016 GitHub, Inc.
|
|
// Use of this source code is governed by the MIT license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#include "atom/browser/atom_blob_reader.h"
|
|
|
|
#include "content/browser/blob_storage/chrome_blob_storage_context.h"
|
|
#include "content/public/browser/browser_thread.h"
|
|
#include "net/base/io_buffer.h"
|
|
#include "net/base/net_errors.h"
|
|
#include "storage/browser/blob/blob_data_handle.h"
|
|
#include "storage/browser/blob/blob_reader.h"
|
|
#include "storage/browser/blob/blob_storage_context.h"
|
|
#include "storage/browser/fileapi/file_system_context.h"
|
|
|
|
#include "atom/common/node_includes.h"
|
|
|
|
using content::BrowserThread;
|
|
|
|
namespace atom {
|
|
|
|
namespace {
|
|
|
|
void FreeNodeBufferData(char* data, void* hint) {
|
|
delete[] data;
|
|
}
|
|
|
|
void RunCallbackInUI(
|
|
const AtomBlobReader::CompletionCallback& callback,
|
|
char* blob_data,
|
|
int size) {
|
|
DCHECK_CURRENTLY_ON(BrowserThread::UI);
|
|
|
|
v8::Isolate* isolate = v8::Isolate::GetCurrent();
|
|
v8::Locker locker(isolate);
|
|
v8::HandleScope handle_scope(isolate);
|
|
if (blob_data) {
|
|
v8::Local<v8::Value> buffer = node::Buffer::New(isolate,
|
|
blob_data, static_cast<size_t>(size), &FreeNodeBufferData, nullptr)
|
|
.ToLocalChecked();
|
|
callback.Run(buffer);
|
|
} else {
|
|
callback.Run(v8::Null(isolate));
|
|
}
|
|
}
|
|
|
|
} // namespace
|
|
|
|
AtomBlobReader::AtomBlobReader(
|
|
content::ChromeBlobStorageContext* blob_context,
|
|
storage::FileSystemContext* file_system_context)
|
|
: blob_context_(blob_context),
|
|
file_system_context_(file_system_context) {
|
|
}
|
|
|
|
AtomBlobReader::~AtomBlobReader() {
|
|
}
|
|
|
|
void AtomBlobReader::StartReading(
|
|
const std::string& uuid,
|
|
const AtomBlobReader::CompletionCallback& completion_callback) {
|
|
DCHECK_CURRENTLY_ON(BrowserThread::IO);
|
|
|
|
auto blob_data_handle =
|
|
blob_context_->context()->GetBlobDataFromUUID(uuid);
|
|
auto callback = base::Bind(&RunCallbackInUI,
|
|
completion_callback);
|
|
if (!blob_data_handle) {
|
|
BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
|
|
base::Bind(callback, nullptr, 0));
|
|
return;
|
|
}
|
|
|
|
auto blob_reader = blob_data_handle->CreateReader(
|
|
file_system_context_.get());
|
|
BlobReadHelper* blob_read_helper =
|
|
new BlobReadHelper(std::move(blob_reader), callback);
|
|
blob_read_helper->Read();
|
|
}
|
|
|
|
AtomBlobReader::BlobReadHelper::BlobReadHelper(
|
|
std::unique_ptr<storage::BlobReader> blob_reader,
|
|
const BlobReadHelper::CompletionCallback& callback)
|
|
: blob_reader_(std::move(blob_reader)),
|
|
completion_callback_(callback) {
|
|
}
|
|
|
|
AtomBlobReader::BlobReadHelper::~BlobReadHelper() {
|
|
}
|
|
|
|
void AtomBlobReader::BlobReadHelper::Read() {
|
|
DCHECK_CURRENTLY_ON(BrowserThread::IO);
|
|
|
|
storage::BlobReader::Status size_status = blob_reader_->CalculateSize(
|
|
base::Bind(&AtomBlobReader::BlobReadHelper::DidCalculateSize,
|
|
base::Unretained(this)));
|
|
if (size_status != storage::BlobReader::Status::IO_PENDING)
|
|
DidCalculateSize(net::OK);
|
|
}
|
|
|
|
void AtomBlobReader::BlobReadHelper::DidCalculateSize(int result) {
|
|
DCHECK_CURRENTLY_ON(BrowserThread::IO);
|
|
|
|
if (result != net::OK) {
|
|
DidReadBlobData(nullptr, 0);
|
|
return;
|
|
}
|
|
|
|
uint64_t total_size = blob_reader_->total_size();
|
|
int bytes_read = 0;
|
|
scoped_refptr<net::IOBuffer> blob_data =
|
|
new net::IOBuffer(static_cast<size_t>(total_size));
|
|
auto callback = base::Bind(&AtomBlobReader::BlobReadHelper::DidReadBlobData,
|
|
base::Unretained(this),
|
|
base::RetainedRef(blob_data));
|
|
storage::BlobReader::Status read_status = blob_reader_->Read(
|
|
blob_data.get(),
|
|
total_size,
|
|
&bytes_read,
|
|
callback);
|
|
if (read_status != storage::BlobReader::Status::IO_PENDING)
|
|
callback.Run(bytes_read);
|
|
}
|
|
|
|
void AtomBlobReader::BlobReadHelper::DidReadBlobData(
|
|
const scoped_refptr<net::IOBuffer>& blob_data,
|
|
int size) {
|
|
DCHECK_CURRENTLY_ON(BrowserThread::IO);
|
|
|
|
char* data = new char[size];
|
|
memcpy(data, blob_data->data(), size);
|
|
BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
|
|
base::Bind(completion_callback_, data, size));
|
|
delete this;
|
|
}
|
|
|
|
} // namespace atom
|