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// Copyright 2014 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.
#ifndef NET_BASE_CHUNKED_UPLOAD_DATA_STREAM_H_
#define NET_BASE_CHUNKED_UPLOAD_DATA_STREAM_H_
#include <vector>
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_vector.h"
#include "net/base/completion_callback.h"
#include "net/base/net_export.h"
#include "net/base/upload_data_stream.h"
namespace net {
class IOBuffer;
// Class with a push-based interface for uploading data. Buffers all data until
// the request is completed. Not recommended for uploading large amounts of
// seekable data, due to this buffering behavior.
class NET_EXPORT ChunkedUploadDataStream : public UploadDataStream {
public:
ChunkedUploadDataStream(int64 identifier);
~ChunkedUploadDataStream() override;
// Adds data to the stream. |is_done| should be true if this is the last
// data to be appended. |data_len| must not be 0 unless |is_done| is true.
// Once called with |is_done| being true, must never be called again.
// TODO(mmenke): Consider using IOBuffers instead, to reduce data copies.
void AppendData(const char* data, int data_len, bool is_done);
private:
// UploadDataStream implementation.
int InitInternal() override;
int ReadInternal(IOBuffer* buf, int buf_len) override;
void ResetInternal() override;
int ReadChunk(IOBuffer* buf, int buf_len);
// Index and offset of next element of |upload_data_| to be read.
size_t read_index_;
size_t read_offset_;
// True once all data has been appended to the stream.
bool all_data_appended_;
ScopedVector<std::vector<char>> upload_data_;
// Buffer to write the next read's data to. Only set when a call to
// ReadInternal reads no data.
scoped_refptr<IOBuffer> read_buffer_;
int read_buffer_len_;
DISALLOW_COPY_AND_ASSIGN(ChunkedUploadDataStream);
};
} // namespace net
#endif // NET_BASE_CHUNKED_UPLOAD_DATA_STREAM_H_
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