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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#import "chrome/browser/webshare/mac/sharing_service_operation.h"
#include <AppKit/AppKit.h>
#include <utility>
#include "base/functional/bind.h"
#include "base/i18n/file_util_icu.h"
#include "base/no_destructor.h"
#include "base/rand_util.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "base/uuid.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/visibility_timer_tab_helper.h"
#include "chrome/browser/webshare/prepare_directory_task.h"
#include "chrome/browser/webshare/prepare_subdirectory_task.h"
#include "chrome/browser/webshare/share_service_impl.h"
#include "chrome/browser/webshare/store_files_task.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/render_widget_host_view.h"
#include "content/public/browser/storage_partition.h"
#include "content/public/browser/web_contents.h"
#include "net/base/filename_util.h"
#include "storage/browser/blob/blob_storage_context.h"
#include "url/gurl.h"
using content::BrowserContext;
using content::StoragePartition;
namespace {
constexpr base::FilePath::CharType kWebShareDirname[] =
FILE_PATH_LITERAL("WebShare");
base::FilePath GenerateUniqueSubDirectory(const base::FilePath& directory) {
std::string unique_subdirectory = base::StringPrintf(
"share-%s", base::Uuid::GenerateRandomV4().AsLowercaseString().c_str());
return directory.Append(unique_subdirectory);
}
} // namespace
namespace webshare {
SharingServiceOperation::SharingServiceOperation(
const std::string& title,
const std::string& text,
const GURL& url,
std::vector<blink::mojom::SharedFilePtr> files,
content::WebContents* web_contents)
: web_contents_(web_contents->GetWeakPtr()),
title_(title),
text_(text),
url_(url),
shared_files_(std::move(files)) {}
SharingServiceOperation::~SharingServiceOperation() = default;
void SharingServiceOperation::Share(
blink::mojom::ShareService::ShareCallback callback) {
callback_ = std::move(callback);
Profile* const profile =
Profile::FromBrowserContext(web_contents_->GetBrowserContext());
DCHECK(profile);
// File sharing is denied in incognito, as files are written to disk.
// To prevent sites from using that to detect whether incognito mode is
// active, we deny after a random time delay, to simulate a user cancelling
// the share.
if (profile->IsIncognitoProfile() && !shared_files_.empty()) {
// Random number of seconds in the range [1.0, 2.0).
double delay_seconds = 1.0 + 1.0 * base::RandDouble();
VisibilityTimerTabHelper::CreateForWebContents(web_contents_.get());
VisibilityTimerTabHelper::FromWebContents(web_contents_.get())
->PostTaskAfterVisibleDelay(
FROM_HERE,
base::BindOnce(std::move(callback_),
blink::mojom::ShareError::CANCELED),
base::Seconds(delay_seconds));
return;
}
if (shared_files_.size() == 0) {
GetSharePickerCallback().Run(
web_contents_.get(), file_paths_, text_, title_, url_,
base::BindOnce(&SharingServiceOperation::OnShowSharePicker,
weak_factory_.GetWeakPtr()));
return;
}
BrowserContext* browser_context = web_contents_->GetBrowserContext();
StoragePartition* const partition =
browser_context->GetDefaultStoragePartition();
directory_ = partition->GetPath().Append(kWebShareDirname);
prepare_directory_task_ = std::make_unique<PrepareDirectoryTask>(
directory_, kMaxSharedFileBytes,
base::BindOnce(&SharingServiceOperation::OnPrepareDirectory,
weak_factory_.GetWeakPtr()));
prepare_directory_task_->Start();
}
// static
void SharingServiceOperation::SetSharePickerCallbackForTesting(
SharePickerCallback callback) {
GetSharePickerCallback() = std::move(callback);
}
void SharingServiceOperation::OnPrepareDirectory(
blink::mojom::ShareError error) {
if (!web_contents_ || error != blink::mojom::ShareError::OK) {
std::move(callback_).Run(error);
return;
}
for (const auto& file : shared_files_) {
// SafeBaseName protects against including paths in a file name.
std::string file_name = file->name.path().value();
DCHECK_EQ(file_name.find('/'), std::string::npos);
base::i18n::ReplaceIllegalCharactersInPath(&file_name, '_');
file_paths_.push_back(
GenerateUniqueSubDirectory(directory_).Append(file_name));
}
prepare_subdirectory_task_ = std::make_unique<PrepareSubDirectoryTask>(
file_paths_,
base::BindOnce(&SharingServiceOperation::OnPrepareSubDirectory,
weak_factory_.GetWeakPtr()));
prepare_subdirectory_task_->Start();
}
void SharingServiceOperation::OnPrepareSubDirectory(
blink::mojom::ShareError error) {
if (!web_contents_ || error != blink::mojom::ShareError::OK) {
std::move(callback_).Run(error);
return;
}
auto store_files_task = std::make_unique<StoreFilesTask>(
file_paths_, std::move(shared_files_), kMaxSharedFileBytes,
base::BindOnce(&SharingServiceOperation::OnStoreFiles,
weak_factory_.GetWeakPtr()));
// The StoreFilesTask is self-owned.
store_files_task.release()->Start();
}
void SharingServiceOperation::OnStoreFiles(blink::mojom::ShareError error) {
if (!web_contents_ || error != blink::mojom::ShareError::OK) {
PrepareDirectoryTask::ScheduleSharedFileDeletion(std::move(file_paths_),
base::Minutes(0));
std::move(callback_).Run(error);
return;
}
GetSharePickerCallback().Run(
web_contents_.get(), file_paths_, text_, title_, url_,
base::BindOnce(&SharingServiceOperation::OnShowSharePicker,
weak_factory_.GetWeakPtr()));
}
void SharingServiceOperation::OnShowSharePicker(
blink::mojom::ShareError error) {
if (file_paths_.size() > 0) {
PrepareDirectoryTask::ScheduleSharedFileDeletion(std::move(file_paths_),
base::Seconds(60));
}
std::move(callback_).Run(error);
}
// static
void SharingServiceOperation::ShowSharePicker(
content::WebContents* web_contents,
const std::vector<base::FilePath>& file_paths,
const std::string& text,
const std::string& title,
const GURL& url,
blink::mojom::ShareService::ShareCallback callback) {
std::vector<std::string> file_paths_as_utf8;
for (const auto& file_path : file_paths) {
file_paths_as_utf8.emplace_back(file_path.AsUTF8Unsafe());
}
web_contents->GetRenderWidgetHostView()->ShowSharePicker(
title, text, url.spec(), file_paths_as_utf8, std::move(callback));
}
// static
SharingServiceOperation::SharePickerCallback&
SharingServiceOperation::GetSharePickerCallback() {
static base::NoDestructor<SharePickerCallback> callback(
base::BindRepeating(&SharingServiceOperation::ShowSharePicker));
return *callback;
}
} // namespace webshare
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