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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 "chrome/browser/chromeos/customization/customization_wallpaper_downloader.h"
#include <math.h>
#include <algorithm>
#include "base/files/file_util.h"
#include "content/public/browser/browser_thread.h"
#include "net/base/load_flags.h"
#include "net/http/http_status_code.h"
#include "net/url_request/url_fetcher.h"
#include "net/url_request/url_request_context_getter.h"
#include "url/gurl.h"
namespace chromeos {
namespace {
// This is temporary file suffix (for downloading or resizing).
const char kTemporarySuffix[] = ".tmp";
// Sleep between wallpaper retries (used multiplied by squared retry number).
const unsigned kRetrySleepSeconds = 10;
// Retry is infinite with increasing intervals. When calculated delay becomes
// longer than maximum (kMaxRetrySleepSeconds) it is set to the maximum.
const double kMaxRetrySleepSeconds = 6 * 3600; // 6 hours
void CreateWallpaperDirectory(const base::FilePath& wallpaper_dir,
bool* success) {
DCHECK(content::BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
DCHECK(success);
*success = CreateDirectoryAndGetError(wallpaper_dir, NULL);
if (!*success) {
NOTREACHED() << "Failed to create directory '" << wallpaper_dir.value()
<< "'";
}
}
void RenameTemporaryFile(const base::FilePath& from,
const base::FilePath& to,
bool* success) {
DCHECK(content::BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
DCHECK(success);
base::File::Error error;
if (base::ReplaceFile(from, to, &error)) {
*success = true;
} else {
LOG(WARNING)
<< "Failed to rename temporary file of Customized Wallpaper. error="
<< error;
*success = false;
}
}
} // namespace
CustomizationWallpaperDownloader::CustomizationWallpaperDownloader(
net::URLRequestContextGetter* url_context_getter,
const GURL& wallpaper_url,
const base::FilePath& wallpaper_dir,
const base::FilePath& wallpaper_downloaded_file,
base::Callback<void(bool success, const GURL&)>
on_wallpaper_fetch_completed)
: url_context_getter_(url_context_getter),
wallpaper_url_(wallpaper_url),
wallpaper_dir_(wallpaper_dir),
wallpaper_downloaded_file_(wallpaper_downloaded_file),
wallpaper_temporary_file_(wallpaper_downloaded_file.value() +
kTemporarySuffix),
retries_(0),
retry_delay_(base::TimeDelta::FromSeconds(kRetrySleepSeconds)),
on_wallpaper_fetch_completed_(on_wallpaper_fetch_completed),
weak_factory_(this) {
DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
}
CustomizationWallpaperDownloader::~CustomizationWallpaperDownloader() {
DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
}
void CustomizationWallpaperDownloader::StartRequest() {
DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
DCHECK(wallpaper_url_.is_valid());
url_fetcher_.reset(
net::URLFetcher::Create(wallpaper_url_, net::URLFetcher::GET, this));
url_fetcher_->SetRequestContext(url_context_getter_.get());
url_fetcher_->SetLoadFlags(net::LOAD_BYPASS_CACHE |
net::LOAD_DISABLE_CACHE |
net::LOAD_DO_NOT_SAVE_COOKIES |
net::LOAD_DO_NOT_SEND_COOKIES |
net::LOAD_DO_NOT_SEND_AUTH_DATA);
base::SequencedWorkerPool* blocking_pool =
content::BrowserThread::GetBlockingPool();
url_fetcher_->SaveResponseToFileAtPath(
wallpaper_temporary_file_,
blocking_pool->GetSequencedTaskRunner(blocking_pool->GetSequenceToken()));
url_fetcher_->Start();
}
void CustomizationWallpaperDownloader::Retry() {
DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
++retries_;
const double delay_seconds = std::min(
kMaxRetrySleepSeconds,
static_cast<double>(retries_) * retries_ * retry_delay_.InSecondsF());
const base::TimeDelta delay = base::TimeDelta::FromSecondsD(delay_seconds);
VLOG(1) << "Schedule Customized Wallpaper download in " << delay.InSecondsF()
<< " seconds (retry = " << retries_ << ").";
retry_current_delay_ = delay;
request_scheduled_.Start(
FROM_HERE, delay, this, &CustomizationWallpaperDownloader::StartRequest);
}
void CustomizationWallpaperDownloader::Start() {
DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
scoped_ptr<bool> success(new bool(false));
base::Closure mkdir_closure = base::Bind(&CreateWallpaperDirectory,
wallpaper_dir_,
base::Unretained(success.get()));
base::Closure on_created_closure =
base::Bind(&CustomizationWallpaperDownloader::OnWallpaperDirectoryCreated,
weak_factory_.GetWeakPtr(),
base::Passed(success.Pass()));
if (!content::BrowserThread::PostBlockingPoolTaskAndReply(
FROM_HERE, mkdir_closure, on_created_closure)) {
LOG(WARNING) << "Failed to start Customized Wallpaper download.";
}
}
void CustomizationWallpaperDownloader::OnWallpaperDirectoryCreated(
scoped_ptr<bool> success) {
DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
if (*success)
StartRequest();
}
void CustomizationWallpaperDownloader::OnURLFetchComplete(
const net::URLFetcher* source) {
DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
DCHECK_EQ(url_fetcher_.get(), source);
const net::URLRequestStatus status = source->GetStatus();
const int response_code = source->GetResponseCode();
const bool server_error =
!status.is_success() ||
(response_code >= net::HTTP_INTERNAL_SERVER_ERROR &&
response_code < (net::HTTP_INTERNAL_SERVER_ERROR + 100));
VLOG(1) << "CustomizationWallpaperDownloader::OnURLFetchComplete(): status="
<< status.status();
if (server_error) {
url_fetcher_.reset();
Retry();
return;
}
base::FilePath response_path;
url_fetcher_->GetResponseAsFilePath(true, &response_path);
url_fetcher_.reset();
scoped_ptr<bool> success(new bool(false));
base::Closure rename_closure = base::Bind(&RenameTemporaryFile,
response_path,
wallpaper_downloaded_file_,
base::Unretained(success.get()));
base::Closure on_rename_closure =
base::Bind(&CustomizationWallpaperDownloader::OnTemporaryFileRenamed,
weak_factory_.GetWeakPtr(),
base::Passed(success.Pass()));
if (!content::BrowserThread::PostBlockingPoolTaskAndReply(
FROM_HERE, rename_closure, on_rename_closure)) {
LOG(WARNING)
<< "Failed to start Customized Wallpaper Rename DownloadedFile.";
on_wallpaper_fetch_completed_.Run(false, wallpaper_url_);
}
}
void CustomizationWallpaperDownloader::OnTemporaryFileRenamed(
scoped_ptr<bool> success) {
DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
on_wallpaper_fetch_completed_.Run(*success, wallpaper_url_);
}
} // namespace chromeos
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