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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef NET_BASE_UPLOAD_FILE_ELEMENT_READER_H_
#define NET_BASE_UPLOAD_FILE_ELEMENT_READER_H_
#include <stdint.h>
#include <memory>
#include "base/compiler_specific.h"
#include "base/files/file.h"
#include "base/files/file_path.h"
#include "base/gtest_prod_util.h"
#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "base/time/time.h"
#include "net/base/net_export.h"
#include "net/base/upload_element_reader.h"
namespace base {
class TaskRunner;
}
namespace net {
class FileStream;
// An UploadElementReader implementation for file.
class NET_EXPORT UploadFileElementReader : public UploadElementReader {
public:
// |file| must be valid and opened for reading. On Windows, the file must have
// been opened with File::FLAG_ASYNC, and elsewhere it must have ben opened
// without it. |path| is never validated or used to re-open the file. It's
// only used as the return value for path().
// |task_runner| is used to perform file operations. It must not be NULL.
//
// TODO(mmenke): Remove |task_runner| argument, and use the ThreadPool
// instead.
UploadFileElementReader(base::TaskRunner* task_runner,
base::File file,
const base::FilePath& path,
uint64_t range_offset,
uint64_t range_length,
const base::Time& expected_modification_time);
// Same a above, but takes a FilePath instead.
// TODO(mmenke): Remove if all consumers can be switched to the first
// constructor.
UploadFileElementReader(base::TaskRunner* task_runner,
const base::FilePath& path,
uint64_t range_offset,
uint64_t range_length,
const base::Time& expected_modification_time);
UploadFileElementReader(const UploadFileElementReader&) = delete;
UploadFileElementReader& operator=(const UploadFileElementReader&) = delete;
~UploadFileElementReader() override;
const base::FilePath& path() const { return path_; }
uint64_t range_offset() const { return range_offset_; }
uint64_t range_length() const { return range_length_; }
const base::Time& expected_modification_time() const {
return expected_modification_time_;
}
// UploadElementReader overrides:
const UploadFileElementReader* AsFileReader() const override;
int Init(CompletionOnceCallback callback) override;
uint64_t GetContentLength() const override;
uint64_t BytesRemaining() const override;
int Read(IOBuffer* buf,
int buf_length,
CompletionOnceCallback callback) override;
private:
enum class State {
// No async operation is pending.
IDLE,
// The ordered sequence of events started by calling Init().
// Opens file. State is skipped if file already open.
OPEN,
OPEN_COMPLETE,
SEEK,
GET_FILE_INFO,
GET_FILE_INFO_COMPLETE,
// There is no READ state as reads are always started immediately on Read().
READ_COMPLETE,
};
FRIEND_TEST_ALL_PREFIXES(ElementsUploadDataStreamTest, FileSmallerThanLength);
FRIEND_TEST_ALL_PREFIXES(HttpNetworkTransactionTest,
UploadFileSmallerThanLength);
int DoLoop(int result);
int DoOpen();
int DoOpenComplete(int result);
int DoSeek();
int DoGetFileInfo(int result);
int DoGetFileInfoComplete(int result);
int DoReadComplete(int result);
void OnIOComplete(int result);
// Sets an value to override the result for GetContentLength().
// Used for tests.
struct NET_EXPORT_PRIVATE ScopedOverridingContentLengthForTests {
explicit ScopedOverridingContentLengthForTests(uint64_t value);
~ScopedOverridingContentLengthForTests();
};
scoped_refptr<base::TaskRunner> task_runner_;
const base::FilePath path_;
const uint64_t range_offset_;
const uint64_t range_length_;
const base::Time expected_modification_time_;
std::unique_ptr<FileStream> file_stream_;
uint64_t content_length_ = 0;
uint64_t bytes_remaining_ = 0;
// File information. Only valid during GET_FILE_INFO_COMPLETE state.
base::File::Info file_info_;
State next_state_ = State::IDLE;
CompletionOnceCallback pending_callback_;
// True if Init() was called while an async operation was in progress.
bool init_called_while_operation_pending_ = false;
base::WeakPtrFactory<UploadFileElementReader> weak_ptr_factory_{this};
};
} // namespace net
#endif // NET_BASE_UPLOAD_FILE_ELEMENT_READER_H_
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