blob: e3e0734e0244611bd073d227c051176349085f9b [file] [log] [blame]
// Copyright (c) 2012 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 "net/base/file_stream_context.h"
#include <utility>
#include "base/files/file_path.h"
#include "base/location.h"
#include "base/task_runner.h"
#include "base/task_runner_util.h"
#include "base/threading/thread_restrictions.h"
#include "base/values.h"
#include "net/base/net_errors.h"
#ifdef STARBOARD
#include "base/message_loop/message_loop.h"
#include "base/single_thread_task_runner.h"
#include "nb/polymorphic_downcast.h"
#endif
#if defined(OS_ANDROID)
#include "base/android/content_uri_utils.h"
#endif
namespace net {
namespace {
void CallInt64ToInt(CompletionOnceCallback callback, int64_t result) {
std::move(callback).Run(static_cast<int>(result));
}
} // namespace
FileStream::Context::IOResult::IOResult()
: result(OK),
os_error(0) {
}
FileStream::Context::IOResult::IOResult(int64_t result,
logging::SystemErrorCode os_error)
: result(result), os_error(os_error) {
}
// static
FileStream::Context::IOResult FileStream::Context::IOResult::FromOSError(
logging::SystemErrorCode os_error) {
return IOResult(MapSystemError(os_error), os_error);
}
#if defined(STARBOARD)
//static
FileStream::Context::IOResult FileStream::Context::IOResult::FromFileError(
base::File::Error file_error, logging::SystemErrorCode os_error) {
if (file_error == base::File::FILE_ERROR_NOT_FOUND) {
return IOResult(ERR_FILE_NOT_FOUND, os_error);
} else {
return IOResult(ERR_FAILED, os_error);
}
}
#endif
// ---------------------------------------------------------------------
FileStream::Context::OpenResult::OpenResult() = default;
FileStream::Context::OpenResult::OpenResult(base::File file,
IOResult error_code)
: file(std::move(file)), error_code(error_code) {}
FileStream::Context::OpenResult::OpenResult(OpenResult&& other)
: file(std::move(other.file)), error_code(other.error_code) {}
FileStream::Context::OpenResult& FileStream::Context::OpenResult::operator=(
OpenResult&& other) {
file = std::move(other.file);
error_code = other.error_code;
return *this;
}
// ---------------------------------------------------------------------
void FileStream::Context::Orphan() {
DCHECK(!orphaned_);
orphaned_ = true;
if (!async_in_progress_) {
CloseAndDelete();
} else if (file_.IsValid()) {
#if defined(OS_WIN)
CancelIo(file_.GetPlatformFile());
#endif
}
}
void FileStream::Context::Open(const base::FilePath& path,
int open_flags,
CompletionOnceCallback callback) {
DCHECK(!async_in_progress_);
bool posted = base::PostTaskAndReplyWithResult(
task_runner_.get(), FROM_HERE,
base::BindOnce(&Context::OpenFileImpl, base::Unretained(this), path,
open_flags),
base::BindOnce(&Context::OnOpenCompleted, base::Unretained(this),
std::move(callback)));
DCHECK(posted);
async_in_progress_ = true;
}
void FileStream::Context::Close(CompletionOnceCallback callback) {
DCHECK(!async_in_progress_);
bool posted = base::PostTaskAndReplyWithResult(
task_runner_.get(), FROM_HERE,
base::BindOnce(&Context::CloseFileImpl, base::Unretained(this)),
base::BindOnce(&Context::OnAsyncCompleted, base::Unretained(this),
IntToInt64(std::move(callback))));
DCHECK(posted);
async_in_progress_ = true;
}
void FileStream::Context::Seek(int64_t offset,
Int64CompletionOnceCallback callback) {
DCHECK(!async_in_progress_);
bool posted = base::PostTaskAndReplyWithResult(
task_runner_.get(), FROM_HERE,
base::BindOnce(&Context::SeekFileImpl, base::Unretained(this), offset),
base::BindOnce(&Context::OnAsyncCompleted, base::Unretained(this),
std::move(callback)));
DCHECK(posted);
async_in_progress_ = true;
}
void FileStream::Context::GetFileInfo(base::File::Info* file_info,
CompletionOnceCallback callback) {
base::PostTaskAndReplyWithResult(
task_runner_.get(), FROM_HERE,
base::BindOnce(&Context::GetFileInfoImpl, base::Unretained(this),
base::Unretained(file_info)),
base::BindOnce(&Context::OnAsyncCompleted, base::Unretained(this),
IntToInt64(std::move(callback))));
async_in_progress_ = true;
}
void FileStream::Context::Flush(CompletionOnceCallback callback) {
DCHECK(!async_in_progress_);
bool posted = base::PostTaskAndReplyWithResult(
task_runner_.get(), FROM_HERE,
base::BindOnce(&Context::FlushFileImpl, base::Unretained(this)),
base::BindOnce(&Context::OnAsyncCompleted, base::Unretained(this),
IntToInt64(std::move(callback))));
DCHECK(posted);
async_in_progress_ = true;
}
bool FileStream::Context::IsOpen() const {
return file_.IsValid();
}
FileStream::Context::OpenResult FileStream::Context::OpenFileImpl(
const base::FilePath& path, int open_flags) {
#if defined(OS_POSIX) || defined(STARBOARD)
// Always use blocking IO.
open_flags &= ~base::File::FLAG_ASYNC;
#endif
base::File file;
#if defined(OS_ANDROID)
if (path.IsContentUri()) {
// Check that only Read flags are set.
DCHECK_EQ(open_flags & ~base::File::FLAG_ASYNC,
base::File::FLAG_OPEN | base::File::FLAG_READ);
file = base::OpenContentUriForRead(path);
} else {
#endif // defined(OS_ANDROID)
// FileStream::Context actually closes the file asynchronously,
// independently from FileStream's destructor. It can cause problems for
// users wanting to delete the file right after FileStream deletion. Thus
// we are always adding SHARE_DELETE flag to accommodate such use case.
// TODO(rvargas): This sounds like a bug, as deleting the file would
// presumably happen on the wrong thread. There should be an async delete.
open_flags |= base::File::FLAG_SHARE_DELETE;
file.Initialize(path, open_flags);
#if defined(OS_ANDROID)
}
#endif // defined(OS_ANDROID)
if (!file.IsValid()) {
#if defined(STARBOARD)
return OpenResult(
base::File(), IOResult::FromFileError(
file.error_details(), logging::GetLastSystemErrorCode()));
#else
return OpenResult(base::File(),
IOResult::FromOSError(logging::GetLastSystemErrorCode()));
#endif
}
return OpenResult(std::move(file), IOResult(OK, 0));
}
FileStream::Context::IOResult FileStream::Context::GetFileInfoImpl(
base::File::Info* file_info) {
bool result = file_.GetInfo(file_info);
if (!result)
return IOResult::FromOSError(logging::GetLastSystemErrorCode());
return IOResult(OK, 0);
}
FileStream::Context::IOResult FileStream::Context::CloseFileImpl() {
file_.Close();
return IOResult(OK, 0);
}
FileStream::Context::IOResult FileStream::Context::FlushFileImpl() {
if (file_.Flush())
return IOResult(OK, 0);
return IOResult::FromOSError(logging::GetLastSystemErrorCode());
}
void FileStream::Context::OnOpenCompleted(CompletionOnceCallback callback,
OpenResult open_result) {
file_ = std::move(open_result.file);
if (file_.IsValid() && !orphaned_)
OnFileOpened();
OnAsyncCompleted(IntToInt64(std::move(callback)), open_result.error_code);
}
void FileStream::Context::CloseAndDelete() {
DCHECK(!async_in_progress_);
if (file_.IsValid()) {
#ifdef STARBOARD
// On Windows, holding file_ will prevent re-creation immediately after
// CloseAndDelete is called, failing some tests.
if (base::MessageLoop::current()->task_runner() == task_runner_.get()) {
file_.Close();
delete this;
return;
}
#endif
bool posted = task_runner_.get()->PostTask(
FROM_HERE, base::BindOnce(base::IgnoreResult(&Context::CloseFileImpl),
base::Owned(this)));
DCHECK(posted);
} else {
delete this;
}
}
Int64CompletionOnceCallback FileStream::Context::IntToInt64(
CompletionOnceCallback callback) {
return base::BindOnce(&CallInt64ToInt, std::move(callback));
}
void FileStream::Context::OnAsyncCompleted(Int64CompletionOnceCallback callback,
const IOResult& result) {
// Reset this before Run() as Run() may issue a new async operation. Also it
// should be reset before Close() because it shouldn't run if any async
// operation is in progress.
async_in_progress_ = false;
if (orphaned_) {
CloseAndDelete();
} else {
std::move(callback).Run(result.result);
}
}
} // namespace net