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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 "base/file_util.h"
#include "base/files/file_enumerator.h"
#include "base/threading/worker_pool.h"
#include "chrome/browser/extensions/api/image_writer_private/error_messages.h"
#include "chrome/browser/extensions/api/image_writer_private/operation.h"
#include "chrome/browser/extensions/api/image_writer_private/operation_manager.h"
#include "content/public/browser/browser_thread.h"
#include "third_party/zlib/google/zip.h"
namespace extensions {
namespace image_writer {
using content::BrowserThread;
const int kBurningBlockSize = 8 * 1024; // 8 KiB
void Operation::Write(const base::Closure& continuation) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
if (IsCancelled()) {
return;
}
SetStage(image_writer_api::STAGE_WRITE);
// TODO (haven): Unmount partitions before writing. http://crbug.com/284834
base::PlatformFileError result;
image_file_ = base::CreatePlatformFile(
image_path_,
base::PLATFORM_FILE_OPEN | base::PLATFORM_FILE_READ,
NULL,
&result);
if (result != base::PLATFORM_FILE_OK) {
Error(error::kImageOpenError);
return;
}
device_file_ = base::CreatePlatformFile(
device_path_,
base::PLATFORM_FILE_OPEN | base::PLATFORM_FILE_WRITE,
NULL,
&result);
if (result != base::PLATFORM_FILE_OK) {
Error(error::kDeviceOpenError);
base::ClosePlatformFile(image_file_);
return;
}
int64 total_size;
base::GetFileSize(image_path_, &total_size);
BrowserThread::PostTask(
BrowserThread::FILE,
FROM_HERE,
base::Bind(&Operation::WriteChunk, this, 0, total_size, continuation));
}
void Operation::WriteChunk(const int64& bytes_written,
const int64& total_size,
const base::Closure& continuation) {
if (!IsCancelled()) {
scoped_ptr<char[]> buffer(new char[kBurningBlockSize]);
int64 len = base::ReadPlatformFile(
image_file_, bytes_written, buffer.get(), kBurningBlockSize);
if (len > 0) {
if (base::WritePlatformFile(
device_file_, bytes_written, buffer.get(), len) == len) {
int percent_curr =
kProgressComplete * (bytes_written + len) / total_size;
SetProgress(percent_curr);
BrowserThread::PostTask(BrowserThread::FILE,
FROM_HERE,
base::Bind(&Operation::WriteChunk,
this,
bytes_written + len,
total_size,
continuation));
return;
} else {
Error(error::kDeviceWriteError);
}
} else if (len == 0) {
WriteComplete(continuation);
} else { // len < 0
Error(error::kImageReadError);
}
}
base::ClosePlatformFile(image_file_);
base::ClosePlatformFile(device_file_);
}
void Operation::WriteComplete(const base::Closure& continuation) {
SetProgress(kProgressComplete);
BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE, continuation);
}
void Operation::VerifyWrite(const base::Closure& continuation) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
if (IsCancelled()) {
return;
}
SetStage(image_writer_api::STAGE_VERIFYWRITE);
base::PlatformFileError result;
image_file_ = base::CreatePlatformFile(
image_path_,
base::PLATFORM_FILE_OPEN | base::PLATFORM_FILE_READ,
NULL,
&result);
if (result != base::PLATFORM_FILE_OK) {
Error(error::kImageOpenError);
return;
}
device_file_ = base::CreatePlatformFile(
device_path_,
base::PLATFORM_FILE_OPEN | base::PLATFORM_FILE_READ,
NULL,
&result);
if (result != base::PLATFORM_FILE_OK) {
Error(error::kDeviceOpenError);
base::ClosePlatformFile(image_file_);
return;
}
int64 total_size;
base::GetFileSize(image_path_, &total_size);
BrowserThread::PostTask(
BrowserThread::FILE,
FROM_HERE,
base::Bind(
&Operation::VerifyWriteChunk, this, 0, total_size, continuation));
}
void Operation::VerifyWriteChunk(const int64& bytes_processed,
const int64& total_size,
const base::Closure& continuation) {
if (!IsCancelled()) {
scoped_ptr<char[]> source_buffer(new char[kBurningBlockSize]);
scoped_ptr<char[]> target_buffer(new char[kBurningBlockSize]);
int64 image_bytes_read = base::ReadPlatformFile(
image_file_, bytes_processed, source_buffer.get(), kBurningBlockSize);
if (image_bytes_read > 0) {
int64 device_bytes_read = base::ReadPlatformFile(
device_file_, bytes_processed, target_buffer.get(), image_bytes_read);
if (image_bytes_read == device_bytes_read &&
memcmp(source_buffer.get(), target_buffer.get(), image_bytes_read) ==
0) {
int percent_curr = kProgressComplete *
(bytes_processed + image_bytes_read) / total_size;
SetProgress(percent_curr);
BrowserThread::PostTask(BrowserThread::FILE,
FROM_HERE,
base::Bind(&Operation::VerifyWriteChunk,
this,
bytes_processed + image_bytes_read,
total_size,
continuation));
return;
} else {
Error(error::kVerificationFailed);
}
} else if (image_bytes_read == 0) {
VerifyWriteComplete(continuation);
} else { // len < 0
Error(error::kImageReadError);
}
}
base::ClosePlatformFile(image_file_);
base::ClosePlatformFile(device_file_);
}
void Operation::VerifyWriteComplete(const base::Closure& continuation) {
SetProgress(kProgressComplete);
BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE, continuation);
}
} // namespace image_writer
} // namespace extensions
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