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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/offline_pages/offline_page_mhtml_archiver.h"
#include <string>
#include <utility>
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/functional/bind.h"
#include "base/functional/callback_helpers.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/metrics/histogram_functions.h"
#include "base/task/single_thread_task_runner.h"
#include "base/task/thread_pool.h"
#include "base/uuid.h"
#include "chrome/browser/offline_pages/offline_page_utils.h"
#include "components/offline_pages/core/archive_validator.h"
#include "components/offline_pages/core/model/offline_page_model_utils.h"
#include "components/offline_pages/core/offline_clock.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/web_contents.h"
#include "content/public/common/mhtml_generation_params.h"
#include "net/base/filename_util.h"
namespace offline_pages {
namespace {
void DeleteFileOnFileThread(const base::FilePath& file_path,
base::OnceClosure callback) {
base::ThreadPool::PostTask(
FROM_HERE, {base::MayBlock(), base::TaskPriority::BEST_EFFORT},
base::GetDeleteFileCallback(
file_path, base::OnceCallback<void(bool)>(base::DoNothing())
.Then(std::move(callback))));
}
// Compute a SHA256 digest using a background thread. The computed digest will
// be returned in the callback parameter. If it is empty, the digest calculation
// fails.
void ComputeDigestOnFileThread(
const base::FilePath& file_path,
base::OnceCallback<void(const std::string&)> callback) {
base::ThreadPool::PostTaskAndReplyWithResult(
FROM_HERE, {base::MayBlock(), base::TaskPriority::BEST_EFFORT},
base::BindOnce(&ArchiveValidator::ComputeDigest, file_path),
std::move(callback));
}
} // namespace
// static
OfflinePageMHTMLArchiver::OfflinePageMHTMLArchiver() = default;
OfflinePageMHTMLArchiver::~OfflinePageMHTMLArchiver() = default;
void OfflinePageMHTMLArchiver::CreateArchive(
const base::FilePath& archives_dir,
const CreateArchiveParams& create_archive_params,
content::WebContents* web_contents,
CreateArchiveCallback callback) {
DCHECK(callback_.is_null());
DCHECK(!callback.is_null());
callback_ = std::move(callback);
GenerateMHTML(archives_dir, web_contents, create_archive_params);
}
void OfflinePageMHTMLArchiver::GenerateMHTML(
const base::FilePath& archives_dir,
content::WebContents* web_contents,
const CreateArchiveParams& create_archive_params) {
if (archives_dir.empty()) {
DVLOG(1) << "Archive path was empty. Can't create archive.";
ReportFailure(ArchiverResult::ERROR_ARCHIVE_CREATION_FAILED);
return;
}
if (!web_contents) {
DVLOG(1) << "WebContents is missing. Can't create archive.";
ReportFailure(ArchiverResult::ERROR_CONTENT_UNAVAILABLE);
return;
}
if (!web_contents->GetRenderViewHost()) {
DVLOG(1) << "RenderViewHost is not created yet. Can't create archive.";
ReportFailure(ArchiverResult::ERROR_CONTENT_UNAVAILABLE);
return;
}
GURL url(web_contents->GetLastCommittedURL());
std::u16string title(web_contents->GetTitle());
base::FilePath file_path(
archives_dir.Append(base::Uuid::GenerateRandomV4().AsLowercaseString())
.AddExtension(OfflinePageUtils::kMHTMLExtension));
content::MHTMLGenerationParams params(file_path);
params.use_binary_encoding = true;
params.remove_popup_overlay = create_archive_params.remove_popup_overlay;
web_contents->GenerateMHTMLWithResult(
params,
base::BindOnce(&OfflinePageMHTMLArchiver::OnGenerateMHTMLDone,
weak_ptr_factory_.GetWeakPtr(), url, file_path, title,
create_archive_params.name_space, OfflineTimeNow()));
}
void OfflinePageMHTMLArchiver::OnGenerateMHTMLDone(
const GURL& url,
const base::FilePath& file_path,
const std::u16string& title,
const std::string& name_space,
base::Time mhtml_start_time,
const content::MHTMLGenerationResult& result) {
if (result.file_size < 0) {
DeleteFileAndReportFailure(file_path,
ArchiverResult::ERROR_ARCHIVE_CREATION_FAILED);
return;
}
if (result.file_digest) {
OnComputeDigestDone(url, file_path, title, name_space, base::Time(),
result.file_size, result.file_digest.value());
} else {
const base::Time digest_start_time = OfflineTimeNow();
ComputeDigestOnFileThread(
file_path,
base::BindOnce(&OfflinePageMHTMLArchiver::OnComputeDigestDone,
weak_ptr_factory_.GetWeakPtr(), url, file_path, title,
name_space, digest_start_time, result.file_size));
}
}
void OfflinePageMHTMLArchiver::OnComputeDigestDone(
const GURL& url,
const base::FilePath& file_path,
const std::u16string& title,
const std::string& name_space,
base::Time digest_start_time,
int64_t file_size,
const std::string& digest) {
if (digest.empty()) {
DeleteFileAndReportFailure(file_path,
ArchiverResult::ERROR_DIGEST_CALCULATION_FAILED);
return;
}
base::SingleThreadTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE,
base::BindOnce(std::move(callback_), ArchiverResult::SUCCESSFULLY_CREATED,
url, file_path, title, file_size, digest));
}
void OfflinePageMHTMLArchiver::DeleteFileAndReportFailure(
const base::FilePath& file_path,
ArchiverResult result) {
DeleteFileOnFileThread(
file_path, base::BindOnce(&OfflinePageMHTMLArchiver::ReportFailure,
weak_ptr_factory_.GetWeakPtr(), result));
}
void OfflinePageMHTMLArchiver::ReportFailure(ArchiverResult result) {
DCHECK(result != ArchiverResult::SUCCESSFULLY_CREATED);
base::SingleThreadTaskRunner::GetCurrentDefault()->PostTask(
FROM_HERE,
base::BindOnce(std::move(callback_), result, GURL(), base::FilePath(),
std::u16string(), 0, std::string()));
}
} // namespace offline_pages
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