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124 lines
3.6 KiB
C++
124 lines
3.6 KiB
C++
// Copyright 2014 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "net/base/chunked_upload_data_stream.h"
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#include "base/logging.h"
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#include "base/memory/ptr_util.h"
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#include "net/base/io_buffer.h"
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#include "net/base/net_errors.h"
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namespace net {
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ChunkedUploadDataStream::Writer::~Writer() {}
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bool ChunkedUploadDataStream::Writer::AppendData(const char* data,
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int data_len,
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bool is_done) {
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if (!upload_data_stream_)
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return false;
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upload_data_stream_->AppendData(data, data_len, is_done);
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return true;
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}
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ChunkedUploadDataStream::Writer::Writer(
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base::WeakPtr<ChunkedUploadDataStream> upload_data_stream)
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: upload_data_stream_(upload_data_stream) {}
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ChunkedUploadDataStream::ChunkedUploadDataStream(int64_t identifier)
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: UploadDataStream(true, identifier),
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read_index_(0),
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read_offset_(0),
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all_data_appended_(false),
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read_buffer_len_(0),
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weak_factory_(this) {}
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ChunkedUploadDataStream::~ChunkedUploadDataStream() {
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}
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std::unique_ptr<ChunkedUploadDataStream::Writer>
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ChunkedUploadDataStream::CreateWriter() {
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return base::WrapUnique(new Writer(weak_factory_.GetWeakPtr()));
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}
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void ChunkedUploadDataStream::AppendData(
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const char* data, int data_len, bool is_done) {
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DCHECK(!all_data_appended_);
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DCHECK(data_len > 0 || is_done);
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if (data_len > 0) {
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DCHECK(data);
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upload_data_.push_back(
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std::make_unique<std::vector<char>>(data, data + data_len));
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}
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all_data_appended_ = is_done;
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if (!read_buffer_.get())
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return;
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int result = ReadChunk(read_buffer_.get(), read_buffer_len_);
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// Shouldn't get an error or ERR_IO_PENDING.
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DCHECK_GE(result, 0);
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read_buffer_ = NULL;
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read_buffer_len_ = 0;
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OnReadCompleted(result);
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}
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int ChunkedUploadDataStream::InitInternal(const NetLogWithSource& net_log) {
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// ResetInternal should already have been called.
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DCHECK(!read_buffer_.get());
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DCHECK_EQ(0u, read_index_);
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DCHECK_EQ(0u, read_offset_);
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return OK;
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}
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int ChunkedUploadDataStream::ReadInternal(IOBuffer* buf, int buf_len) {
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DCHECK_LT(0, buf_len);
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DCHECK(!read_buffer_.get());
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int result = ReadChunk(buf, buf_len);
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if (result == ERR_IO_PENDING) {
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read_buffer_ = buf;
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read_buffer_len_ = buf_len;
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}
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return result;
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}
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void ChunkedUploadDataStream::ResetInternal() {
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read_buffer_ = NULL;
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read_buffer_len_ = 0;
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read_index_ = 0;
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read_offset_ = 0;
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}
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int ChunkedUploadDataStream::ReadChunk(IOBuffer* buf, int buf_len) {
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// Copy as much data as possible from |upload_data_| to |buf|.
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int bytes_read = 0;
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while (read_index_ < upload_data_.size() && bytes_read < buf_len) {
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std::vector<char>* data = upload_data_[read_index_].get();
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size_t bytes_to_read =
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std::min(static_cast<size_t>(buf_len - bytes_read),
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data->size() - read_offset_);
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memcpy(buf->data() + bytes_read, data->data() + read_offset_,
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bytes_to_read);
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bytes_read += bytes_to_read;
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read_offset_ += bytes_to_read;
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if (read_offset_ == data->size()) {
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read_index_++;
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read_offset_ = 0;
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}
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}
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DCHECK_LE(bytes_read, buf_len);
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// If no data was written, and not all data has been appended, return
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// ERR_IO_PENDING. The read will be completed in the next call to AppendData.
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if (bytes_read == 0 && !all_data_appended_)
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return ERR_IO_PENDING;
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if (read_index_ == upload_data_.size() && all_data_appended_)
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SetIsFinalChunk();
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return bytes_read;
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}
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} // namespace net
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