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// Copyright (c) 2010 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/upload_data_stream.h"
#include "base/file_util.h"
#include "base/logging.h"
#include "net/base/file_stream.h"
#include "net/base/io_buffer.h"
#include "net/base/net_errors.h"
namespace net {
bool UploadDataStream::merge_chunks_ = true;
UploadDataStream::~UploadDataStream() {
}
UploadDataStream* UploadDataStream::Create(UploadData* data, int* error_code) {
scoped_ptr<UploadDataStream> stream(new UploadDataStream(data));
int rv = stream->FillBuf();
if (error_code)
*error_code = rv;
if (rv != OK)
return NULL;
return stream.release();
}
void UploadDataStream::MarkConsumedAndFillBuffer(size_t num_bytes) {
DCHECK_LE(num_bytes, buf_len_);
DCHECK(!eof_);
if (num_bytes) {
buf_len_ -= num_bytes;
if (buf_len_)
memmove(buf_->data(), buf_->data() + num_bytes, buf_len_);
}
FillBuf();
current_position_ += num_bytes;
}
UploadDataStream::UploadDataStream(UploadData* data)
: data_(data),
buf_(new IOBuffer(kBufSize)),
buf_len_(0),
next_element_(0),
next_element_offset_(0),
next_element_remaining_(0),
total_size_(data->is_chunked() ? 0 : data->GetContentLength()),
current_position_(0),
eof_(false) {
}
int UploadDataStream::FillBuf() {
std::vector<UploadData::Element>& elements = *data_->elements();
while (buf_len_ < kBufSize && next_element_ < elements.size()) {
bool advance_to_next_element = false;
UploadData::Element& element = elements[next_element_];
size_t size_remaining = kBufSize - buf_len_;
if (element.type() == UploadData::TYPE_BYTES ||
element.type() == UploadData::TYPE_CHUNK) {
const std::vector<char>& d = element.bytes();
size_t count = d.size() - next_element_offset_;
size_t bytes_copied = std::min(count, size_remaining);
// Check if we have anything to copy first, because we are getting the
// address of an element in |d| and that will throw an exception if |d|
// is an empty vector.
if (bytes_copied) {
memcpy(buf_->data() + buf_len_, &d[next_element_offset_], bytes_copied);
buf_len_ += bytes_copied;
}
if (bytes_copied == count) {
advance_to_next_element = true;
} else {
next_element_offset_ += bytes_copied;
}
} else {
DCHECK(element.type() == UploadData::TYPE_FILE);
if (!next_element_remaining_) {
// If the underlying file has been changed, treat it as error.
// Note that the expected modification time from WebKit is based on
// time_t precision. So we have to convert both to time_t to compare.
if (!element.expected_file_modification_time().is_null()) {
base::PlatformFileInfo info;
if (file_util::GetFileInfo(element.file_path(), &info) &&
element.expected_file_modification_time().ToTimeT() !=
info.last_modified.ToTimeT()) {
return ERR_UPLOAD_FILE_CHANGED;
}
}
next_element_remaining_ = element.GetContentLength();
next_element_stream_.reset(element.NewFileStreamForReading());
}
int rv = 0;
int count =
static_cast<int>(std::min(next_element_remaining_,
static_cast<uint64>(size_remaining)));
if (count > 0) {
if (next_element_stream_.get())
rv = next_element_stream_->Read(buf_->data() + buf_len_, count, NULL);
if (rv <= 0) {
// If there's less data to read than we initially observed, then
// pad with zero. Otherwise the server will hang waiting for the
// rest of the data.
memset(buf_->data() + buf_len_, 0, count);
rv = count;
}
buf_len_ += rv;
}
if (static_cast<int>(next_element_remaining_) == rv) {
advance_to_next_element = true;
} else {
next_element_remaining_ -= rv;
}
}
if (advance_to_next_element) {
++next_element_;
next_element_offset_ = 0;
next_element_remaining_ = 0;
next_element_stream_.reset();
}
if (is_chunked() && !merge_chunks_)
break;
}
if (next_element_ == elements.size() && !buf_len_) {
if (!data_->is_chunked() ||
(!elements.empty() && elements.back().is_last_chunk())) {
eof_ = true;
}
}
return OK;
}
bool UploadDataStream::IsOnLastChunk() const {
const std::vector<UploadData::Element>& elements = *data_->elements();
DCHECK(data_->is_chunked());
return (eof_ ||
(!elements.empty() &&
next_element_ == elements.size() &&
elements.back().is_last_chunk()));
}
} // namespace net
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