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// Copyright (c) 2012 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 "content/browser/download/download_file_impl.h"
#include <string>
#include "base/bind.h"
#include "base/file_util.h"
#include "base/message_loop_proxy.h"
#include "base/time.h"
#include "content/browser/byte_stream.h"
#include "content/browser/download/download_create_info.h"
#include "content/browser/download/download_interrupt_reasons_impl.h"
#include "content/browser/download/download_net_log_parameters.h"
#include "content/browser/download/download_stats.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/download_destination_observer.h"
#include "content/public/browser/power_save_blocker.h"
#include "net/base/io_buffer.h"
namespace content {
const int kUpdatePeriodMs = 500;
const int kMaxTimeBlockingFileThreadMs = 1000;
int DownloadFile::number_active_objects_ = 0;
DownloadFileImpl::DownloadFileImpl(
scoped_ptr<DownloadSaveInfo> save_info,
const base::FilePath& default_download_directory,
const GURL& url,
const GURL& referrer_url,
bool calculate_hash,
scoped_ptr<ByteStreamReader> stream,
const net::BoundNetLog& bound_net_log,
scoped_ptr<PowerSaveBlocker> power_save_blocker,
base::WeakPtr<DownloadDestinationObserver> observer)
: file_(save_info->file_path,
url,
referrer_url,
save_info->offset,
calculate_hash,
save_info->hash_state,
save_info->file_stream.Pass(),
bound_net_log),
default_download_directory_(default_download_directory),
stream_reader_(stream.Pass()),
bytes_seen_(0),
bound_net_log_(bound_net_log),
observer_(observer),
weak_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)),
power_save_blocker_(power_save_blocker.Pass()) {
}
DownloadFileImpl::~DownloadFileImpl() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
--number_active_objects_;
}
void DownloadFileImpl::Initialize(const InitializeCallback& callback) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
update_timer_.reset(new base::RepeatingTimer<DownloadFileImpl>());
DownloadInterruptReason result =
file_.Initialize(default_download_directory_);
if (result != DOWNLOAD_INTERRUPT_REASON_NONE) {
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE, base::Bind(callback, result));
return;
}
stream_reader_->RegisterCallback(
base::Bind(&DownloadFileImpl::StreamActive, weak_factory_.GetWeakPtr()));
download_start_ = base::TimeTicks::Now();
// Primarily to make reset to zero in restart visible to owner.
SendUpdate();
// Initial pull from the straw.
StreamActive();
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE, base::Bind(
callback, DOWNLOAD_INTERRUPT_REASON_NONE));
++number_active_objects_;
}
DownloadInterruptReason DownloadFileImpl::AppendDataToFile(
const char* data, size_t data_len) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
if (!update_timer_->IsRunning()) {
update_timer_->Start(FROM_HERE,
base::TimeDelta::FromMilliseconds(kUpdatePeriodMs),
this, &DownloadFileImpl::SendUpdate);
}
return file_.AppendDataToFile(data, data_len);
}
void DownloadFileImpl::RenameAndUniquify(
const base::FilePath& full_path,
const RenameCompletionCallback& callback) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
base::FilePath new_path(full_path);
int uniquifier = file_util::GetUniquePathNumber(
new_path, FILE_PATH_LITERAL(std::string()));
if (uniquifier > 0) {
new_path = new_path.InsertBeforeExtensionASCII(
base::StringPrintf(" (%d)", uniquifier));
}
DownloadInterruptReason reason = file_.Rename(new_path);
if (reason != DOWNLOAD_INTERRUPT_REASON_NONE) {
// Make sure our information is updated, since we're about to
// error out.
SendUpdate();
// Null out callback so that we don't do any more stream processing.
stream_reader_->RegisterCallback(base::Closure());
new_path.clear();
}
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
base::Bind(callback, reason, new_path));
}
void DownloadFileImpl::RenameAndAnnotate(
const base::FilePath& full_path,
const RenameCompletionCallback& callback) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
base::FilePath new_path(full_path);
DownloadInterruptReason reason = DOWNLOAD_INTERRUPT_REASON_NONE;
// Short circuit null rename.
if (full_path != file_.full_path())
reason = file_.Rename(new_path);
if (reason == DOWNLOAD_INTERRUPT_REASON_NONE) {
// Doing the annotation after the rename rather than before leaves
// a very small window during which the file has the final name but
// hasn't been marked with the Mark Of The Web. However, it allows
// anti-virus scanners on Windows to actually see the data
// (http://crbug.com/127999) under the correct name (which is information
// it uses).
reason = file_.AnnotateWithSourceInformation();
}
if (reason != DOWNLOAD_INTERRUPT_REASON_NONE) {
// Make sure our information is updated, since we're about to
// error out.
SendUpdate();
// Null out callback so that we don't do any more stream processing.
stream_reader_->RegisterCallback(base::Closure());
new_path.clear();
}
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
base::Bind(callback, reason, new_path));
}
void DownloadFileImpl::Detach() {
file_.Detach();
}
void DownloadFileImpl::Cancel() {
file_.Cancel();
}
base::FilePath DownloadFileImpl::FullPath() const {
return file_.full_path();
}
bool DownloadFileImpl::InProgress() const {
return file_.in_progress();
}
int64 DownloadFileImpl::BytesSoFar() const {
return file_.bytes_so_far();
}
int64 DownloadFileImpl::CurrentSpeed() const {
return file_.CurrentSpeed();
}
bool DownloadFileImpl::GetHash(std::string* hash) {
return file_.GetHash(hash);
}
std::string DownloadFileImpl::GetHashState() {
return file_.GetHashState();
}
void DownloadFileImpl::StreamActive() {
base::TimeTicks start(base::TimeTicks::Now());
base::TimeTicks now;
scoped_refptr<net::IOBuffer> incoming_data;
size_t incoming_data_size = 0;
size_t total_incoming_data_size = 0;
size_t num_buffers = 0;
ByteStreamReader::StreamState state(ByteStreamReader::STREAM_EMPTY);
DownloadInterruptReason reason = DOWNLOAD_INTERRUPT_REASON_NONE;
base::TimeDelta delta(
base::TimeDelta::FromMilliseconds(kMaxTimeBlockingFileThreadMs));
// Take care of any file local activity required.
do {
state = stream_reader_->Read(&incoming_data, &incoming_data_size);
switch (state) {
case ByteStreamReader::STREAM_EMPTY:
break;
case ByteStreamReader::STREAM_HAS_DATA:
{
++num_buffers;
base::TimeTicks write_start(base::TimeTicks::Now());
reason = AppendDataToFile(
incoming_data.get()->data(), incoming_data_size);
disk_writes_time_ += (base::TimeTicks::Now() - write_start);
bytes_seen_ += incoming_data_size;
total_incoming_data_size += incoming_data_size;
}
break;
case ByteStreamReader::STREAM_COMPLETE:
{
reason = stream_reader_->GetStatus();
SendUpdate();
base::TimeTicks close_start(base::TimeTicks::Now());
file_.Finish();
base::TimeTicks now(base::TimeTicks::Now());
disk_writes_time_ += (now - close_start);
RecordFileBandwidth(
bytes_seen_, disk_writes_time_, now - download_start_);
update_timer_.reset();
}
break;
default:
NOTREACHED();
break;
}
now = base::TimeTicks::Now();
} while (state == ByteStreamReader::STREAM_HAS_DATA &&
reason == DOWNLOAD_INTERRUPT_REASON_NONE &&
now - start <= delta);
// If we're stopping to yield the thread, post a task so we come back.
if (state == ByteStreamReader::STREAM_HAS_DATA &&
now - start > delta) {
BrowserThread::PostTask(
BrowserThread::FILE, FROM_HERE,
base::Bind(&DownloadFileImpl::StreamActive,
weak_factory_.GetWeakPtr()));
}
if (total_incoming_data_size)
RecordFileThreadReceiveBuffers(num_buffers);
RecordContiguousWriteTime(now - start);
// Take care of communication with our observer.
if (reason != DOWNLOAD_INTERRUPT_REASON_NONE) {
// Error case for both upstream source and file write.
// Shut down processing and signal an error to our observer.
// Our observer will clean us up.
stream_reader_->RegisterCallback(base::Closure());
weak_factory_.InvalidateWeakPtrs();
SendUpdate(); // Make info up to date before error.
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
base::Bind(&DownloadDestinationObserver::DestinationError,
observer_, reason));
} else if (state == ByteStreamReader::STREAM_COMPLETE) {
// Signal successful completion and shut down processing.
stream_reader_->RegisterCallback(base::Closure());
weak_factory_.InvalidateWeakPtrs();
std::string hash;
if (!GetHash(&hash) || file_.IsEmptyHash(hash))
hash.clear();
SendUpdate();
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
base::Bind(
&DownloadDestinationObserver::DestinationCompleted,
observer_, hash));
}
if (bound_net_log_.IsLoggingAllEvents()) {
bound_net_log_.AddEvent(
net::NetLog::TYPE_DOWNLOAD_STREAM_DRAINED,
base::Bind(&FileStreamDrainedNetLogCallback, total_incoming_data_size,
num_buffers));
}
}
void DownloadFileImpl::SendUpdate() {
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
base::Bind(&DownloadDestinationObserver::DestinationUpdate,
observer_, BytesSoFar(), CurrentSpeed(), GetHashState()));
}
// static
int DownloadFile::GetNumberOfDownloadFiles() {
return number_active_objects_;
}
} // namespace content
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