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- // Copyright (c) 2011 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/platform_util.h"
- #include <windows.h> // Must be in front of other Windows header files.
- #include <commdlg.h>
- #include <dwmapi.h>
- #include <shellapi.h>
- #include <shlobj.h>
- #include <stddef.h>
- #include <wrl/client.h>
- #include "base/base_paths.h"
- #include "base/bind.h"
- #include "base/files/file_path.h"
- #include "base/files/file_util.h"
- #include "base/logging.h"
- #include "base/path_service.h"
- #include "base/strings/string_util.h"
- #include "base/strings/utf_string_conversions.h"
- #include "base/task/thread_pool.h"
- #include "base/threading/scoped_blocking_call.h"
- #include "base/win/registry.h"
- #include "base/win/scoped_co_mem.h"
- #include "chrome/browser/platform_util_internal.h"
- #include "content/public/browser/browser_thread.h"
- #include "ui/base/win/shell.h"
- #include "ui/gfx/native_widget_types.h"
- #include "url/gurl.h"
- using content::BrowserThread;
- namespace platform_util {
- namespace {
- void ShowItemInFolderOnWorkerThread(const base::FilePath& full_path) {
- base::ScopedBlockingCall scoped_blocking_call(FROM_HERE,
- base::BlockingType::MAY_BLOCK);
- base::FilePath dir = full_path.DirName().AsEndingWithSeparator();
- // ParseDisplayName will fail if the directory is "C:", it must be "C:\\".
- if (dir.empty())
- return;
- Microsoft::WRL::ComPtr<IShellFolder> desktop;
- HRESULT hr = SHGetDesktopFolder(&desktop);
- if (FAILED(hr))
- return;
- base::win::ScopedCoMem<ITEMIDLIST> dir_item;
- hr = desktop->ParseDisplayName(NULL, NULL,
- const_cast<wchar_t *>(dir.value().c_str()),
- NULL, &dir_item, NULL);
- if (FAILED(hr))
- return;
- base::win::ScopedCoMem<ITEMIDLIST> file_item;
- hr = desktop->ParseDisplayName(NULL, NULL,
- const_cast<wchar_t *>(full_path.value().c_str()),
- NULL, &file_item, NULL);
- if (FAILED(hr))
- return;
- const ITEMIDLIST* highlight[] = {file_item};
- // Skip opening the folder during browser tests, to avoid leaving an open
- // file explorer window behind.
- if (!platform_util::internal::AreShellOperationsAllowed())
- return;
- hr = SHOpenFolderAndSelectItems(dir_item, std::size(highlight), highlight, 0);
- if (FAILED(hr)) {
- // On some systems, the above call mysteriously fails with "file not
- // found" even though the file is there. In these cases, ShellExecute()
- // seems to work as a fallback (although it won't select the file).
- if (hr == ERROR_FILE_NOT_FOUND) {
- ShellExecute(NULL, L"open", dir.value().c_str(), NULL, NULL, SW_SHOW);
- } else {
- LOG(WARNING) << " " << __func__ << "(): Can't open full_path = \""
- << full_path.value() << "\""
- << " hr = " << logging::SystemErrorCodeToString(hr);
- }
- }
- }
- void OpenExternalOnWorkerThread(const GURL& url) {
- base::ScopedBlockingCall scoped_blocking_call(FROM_HERE,
- base::BlockingType::MAY_BLOCK);
- // Quote the input scheme to be sure that the command does not have
- // parameters unexpected by the external program. This url should already
- // have been escaped.
- std::string escaped_url = url.spec();
- escaped_url.insert(0, "\"");
- escaped_url += "\"";
- // According to Mozilla in uriloader/exthandler/win/nsOSHelperAppService.cpp:
- // "Some versions of windows (Win2k before SP3, Win XP before SP1) crash in
- // ShellExecute on long URLs (bug 161357 on bugzilla.mozilla.org). IE 5 and 6
- // support URLS of 2083 chars in length, 2K is safe."
- //
- // It may be possible to increase this. https://crbug.com/727909
- const size_t kMaxUrlLength = 2048;
- if (escaped_url.length() > kMaxUrlLength)
- return;
- // Specify %windir%\system32 as the CWD so that any new proc spawned does not
- // inherit this proc's CWD. Without this, uninstalls may be broken by a
- // long-lived child proc that holds a handle to the browser's version
- // directory (the browser's CWD). A process's CWD is in the standard list of
- // directories to search when loading a DLL, and precedes the system directory
- // when safe DLL search mode is disabled (not the default). Setting the CWD to
- // the system directory is a nice way to mitigate a potential DLL search order
- // hijack for processes that don't implement their own mitigation.
- base::FilePath system_dir;
- base::PathService::Get(base::DIR_SYSTEM, &system_dir);
- if (reinterpret_cast<ULONG_PTR>(ShellExecuteA(
- NULL, "open", escaped_url.c_str(), NULL,
- system_dir.AsUTF8Unsafe().c_str(), SW_SHOWNORMAL)) <= 32) {
- // On failure, it may be good to display a message to the user.
- // https://crbug.com/727913
- return;
- }
- }
- } // namespace
- void ShowItemInFolder(Profile* profile, const base::FilePath& full_path) {
- base::ThreadPool::CreateCOMSTATaskRunner(
- {base::MayBlock(), base::TaskPriority::USER_BLOCKING})
- ->PostTask(FROM_HERE,
- base::BindOnce(&ShowItemInFolderOnWorkerThread, full_path));
- }
- namespace internal {
- void PlatformOpenVerifiedItem(const base::FilePath& path, OpenItemType type) {
- // May result in an interactive dialog.
- base::ScopedBlockingCall scoped_blocking_call(FROM_HERE,
- base::BlockingType::MAY_BLOCK);
- switch (type) {
- case OPEN_FILE:
- ui::win::OpenFileViaShell(path);
- break;
- case OPEN_FOLDER:
- ui::win::OpenFolderViaShell(path);
- break;
- }
- }
- } // namespace internal
- void OpenExternal(Profile* profile, const GURL& url) {
- DCHECK_CURRENTLY_ON(BrowserThread::UI);
- base::ThreadPool::CreateCOMSTATaskRunner(
- {base::MayBlock(), base::TaskPriority::USER_BLOCKING})
- ->PostTask(FROM_HERE, base::BindOnce(&OpenExternalOnWorkerThread, url));
- }
- } // namespace platform_util
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