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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/shell/browser/shell_download_manager_delegate.h"
#include <algorithm>
#include <string>
#include "base/files/file_path.h"
#include "base/notimplemented.h"
#include "build/build_config.h"
#include "components/download/public/common/download_target_info.h"
#if BUILDFLAG(IS_WIN)
#include <windows.h>
#include <commdlg.h>
#endif
#include "base/check_op.h"
#include "base/command_line.h"
#include "base/compiler_specific.h"
#include "base/files/file_util.h"
#include "base/functional/bind.h"
#include "base/notreached.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/task/thread_pool.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/download_item_utils.h"
#include "content/public/browser/download_manager.h"
#include "content/public/browser/web_contents.h"
#include "content/shell/common/shell_switches.h"
#include "net/base/filename_util.h"
#if BUILDFLAG(IS_WIN)
#include "ui/aura/window.h"
#include "ui/aura/window_tree_host.h"
#endif
namespace content {
ShellDownloadManagerDelegate::ShellDownloadManagerDelegate()
: download_manager_(nullptr), suppress_prompting_(false) {}
ShellDownloadManagerDelegate::~ShellDownloadManagerDelegate() {
if (download_manager_) {
download_manager_->SetDelegate(nullptr);
download_manager_ = nullptr;
}
}
void ShellDownloadManagerDelegate::SetDownloadManager(
DownloadManager* download_manager) {
download_manager_ = download_manager;
}
void ShellDownloadManagerDelegate::Shutdown() {
// Revoke any pending callbacks. download_manager_ et. al. are no longer safe
// to access after this point.
weak_ptr_factory_.InvalidateWeakPtrs();
download_manager_ = nullptr;
}
bool ShellDownloadManagerDelegate::DetermineDownloadTarget(
download::DownloadItem* download,
download::DownloadTargetCallback* callback) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
// This assignment needs to be here because even at the call to
// SetDownloadManager, the system is not fully initialized.
if (default_download_path_.empty()) {
default_download_path_ = download_manager_->GetBrowserContext()
->GetPath()
#if BUILDFLAG(IS_CHROMEOS)
.Append(FILE_PATH_LITERAL("MyFiles"))
#endif
.Append(FILE_PATH_LITERAL("Downloads"));
}
if (!download->GetForcedFilePath().empty()) {
download::DownloadTargetInfo target_info;
target_info.target_path = download->GetForcedFilePath();
target_info.intermediate_path = download->GetForcedFilePath();
std::move(*callback).Run(std::move(target_info));
return true;
}
FilenameDeterminedCallback filename_determined_callback = base::BindOnce(
&ShellDownloadManagerDelegate::OnDownloadPathGenerated,
weak_ptr_factory_.GetWeakPtr(), download->GetId(), std::move(*callback));
base::ThreadPool::PostTask(
FROM_HERE,
{base::MayBlock(), base::TaskShutdownBehavior::SKIP_ON_SHUTDOWN,
base::TaskPriority::USER_VISIBLE},
base::BindOnce(&ShellDownloadManagerDelegate::GenerateFilename,
download->GetURL(), download->GetContentDisposition(),
download->GetSuggestedFilename(), download->GetMimeType(),
default_download_path_,
std::move(filename_determined_callback)));
return true;
}
bool ShellDownloadManagerDelegate::ShouldOpenDownload(
download::DownloadItem* item,
DownloadOpenDelayedCallback callback) {
return true;
}
void ShellDownloadManagerDelegate::GetNextId(DownloadIdCallback callback) {
static uint32_t next_id = download::DownloadItem::kInvalidId + 1;
std::move(callback).Run(next_id++);
}
// static
void ShellDownloadManagerDelegate::GenerateFilename(
const GURL& url,
const std::string& content_disposition,
const std::string& suggested_filename,
const std::string& mime_type,
const base::FilePath& suggested_directory,
FilenameDeterminedCallback callback) {
base::FilePath generated_name = net::GenerateFileName(url,
content_disposition,
std::string(),
suggested_filename,
mime_type,
"download");
if (!base::PathExists(suggested_directory))
base::CreateDirectory(suggested_directory);
base::FilePath suggested_path(suggested_directory.Append(generated_name));
GetUIThreadTaskRunner({})->PostTask(
FROM_HERE, base::BindOnce(std::move(callback), suggested_path));
}
void ShellDownloadManagerDelegate::OnDownloadPathGenerated(
uint32_t download_id,
download::DownloadTargetCallback callback,
const base::FilePath& suggested_path) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
if (suppress_prompting_) {
// Testing exit.
download::DownloadTargetInfo target_info;
target_info.target_path = suggested_path;
target_info.intermediate_path =
suggested_path.AddExtension(FILE_PATH_LITERAL(".crdownload"));
std::move(callback).Run(std::move(target_info));
return;
}
ChooseDownloadPath(download_id, std::move(callback), suggested_path);
}
void ShellDownloadManagerDelegate::ChooseDownloadPath(
uint32_t download_id,
download::DownloadTargetCallback callback,
const base::FilePath& suggested_path) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
download::DownloadItem* item = download_manager_->GetDownload(download_id);
if (!item || (item->GetState() != download::DownloadItem::IN_PROGRESS))
return;
base::FilePath result;
#if BUILDFLAG(IS_WIN)
std::wstring file_part = base::FilePath(suggested_path).BaseName().value();
wchar_t file_name[MAX_PATH];
UNSAFE_TODO(
base::wcslcpy(file_name, file_part.c_str(), std::size(file_name)));
OPENFILENAME save_as;
UNSAFE_TODO(ZeroMemory(&save_as, sizeof(save_as)));
save_as.lStructSize = sizeof(OPENFILENAME);
WebContents* web_contents = DownloadItemUtils::GetWebContents(item);
// |web_contents| could be null if the tab was quickly closed.
if (!web_contents)
return;
save_as.hwndOwner =
web_contents->GetNativeView()->GetHost()->GetAcceleratedWidget();
save_as.lpstrFile = file_name;
save_as.nMaxFile = std::size(file_name);
std::wstring directory;
if (!suggested_path.empty())
directory = suggested_path.DirName().value();
save_as.lpstrInitialDir = directory.c_str();
save_as.Flags = OFN_OVERWRITEPROMPT | OFN_EXPLORER | OFN_ENABLESIZING |
OFN_NOCHANGEDIR | OFN_PATHMUSTEXIST;
if (GetSaveFileName(&save_as))
result = base::FilePath(std::wstring(save_as.lpstrFile));
#else
NOTIMPLEMENTED();
#endif
download::DownloadTargetInfo target_info;
target_info.target_path = result;
target_info.intermediate_path = result;
target_info.target_disposition =
download::DownloadItem::TARGET_DISPOSITION_PROMPT;
std::move(callback).Run(std::move(target_info));
}
void ShellDownloadManagerDelegate::SetDownloadBehaviorForTesting(
const base::FilePath& default_download_path) {
default_download_path_ = default_download_path;
suppress_prompting_ = true;
}
} // namespace content
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