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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.
#include "net/base/chunked_upload_data_stream.h"
#include "base/logging.h"
#include "net/base/io_buffer.h"
#include "net/base/net_errors.h"
namespace net {
ChunkedUploadDataStream::ChunkedUploadDataStream(int64_t identifier)
: UploadDataStream(true, identifier),
read_index_(0),
read_offset_(0),
all_data_appended_(false),
read_buffer_len_(0) {
}
ChunkedUploadDataStream::~ChunkedUploadDataStream() {
}
void ChunkedUploadDataStream::AppendData(
const char* data, int data_len, bool is_done) {
DCHECK(!all_data_appended_);
DCHECK(data_len > 0 || is_done);
if (data_len > 0) {
DCHECK(data);
upload_data_.push_back(
make_scoped_ptr(new std::vector<char>(data, data + data_len)));
}
all_data_appended_ = is_done;
if (!read_buffer_.get())
return;
int result = ReadChunk(read_buffer_.get(), read_buffer_len_);
// Shouldn't get an error or ERR_IO_PENDING.
DCHECK_GE(result, 0);
read_buffer_ = NULL;
read_buffer_len_ = 0;
OnReadCompleted(result);
}
int ChunkedUploadDataStream::InitInternal() {
// ResetInternal should already have been called.
DCHECK(!read_buffer_.get());
DCHECK_EQ(0u, read_index_);
DCHECK_EQ(0u, read_offset_);
return OK;
}
int ChunkedUploadDataStream::ReadInternal(IOBuffer* buf, int buf_len) {
DCHECK_LT(0, buf_len);
DCHECK(!read_buffer_.get());
int result = ReadChunk(buf, buf_len);
if (result == ERR_IO_PENDING) {
read_buffer_ = buf;
read_buffer_len_ = buf_len;
}
return result;
}
void ChunkedUploadDataStream::ResetInternal() {
read_buffer_ = NULL;
read_buffer_len_ = 0;
read_index_ = 0;
read_offset_ = 0;
}
int ChunkedUploadDataStream::ReadChunk(IOBuffer* buf, int buf_len) {
// Copy as much data as possible from |upload_data_| to |buf|.
int bytes_read = 0;
while (read_index_ < upload_data_.size() && bytes_read < buf_len) {
std::vector<char>* data = upload_data_[read_index_].get();
size_t bytes_to_read =
std::min(static_cast<size_t>(buf_len - bytes_read),
data->size() - read_offset_);
memcpy(buf->data() + bytes_read, data->data() + read_offset_,
bytes_to_read);
bytes_read += bytes_to_read;
read_offset_ += bytes_to_read;
if (read_offset_ == data->size()) {
read_index_++;
read_offset_ = 0;
}
}
DCHECK_LE(bytes_read, buf_len);
// If no data was written, and not all data has been appended, return
// ERR_IO_PENDING. The read will be completed in the next call to AppendData.
if (bytes_read == 0 && !all_data_appended_)
return ERR_IO_PENDING;
if (read_index_ == upload_data_.size() && all_data_appended_)
SetIsFinalChunk();
return bytes_read;
}
} // namespace net
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