1 // Copyright 2011 The Chromium Authors
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "chrome/browser/platform_util.h"
7 #include <windows.h> // Must be in front of other Windows header files.
14 #include <wrl/client.h>
16 #include "base/base_paths.h"
17 #include "base/files/file_path.h"
18 #include "base/files/file_util.h"
19 #include "base/functional/bind.h"
20 #include "base/logging.h"
21 #include "base/path_service.h"
22 #include "base/strings/string_util.h"
23 #include "base/strings/utf_string_conversions.h"
24 #include "base/task/thread_pool.h"
25 #include "base/threading/scoped_blocking_call.h"
26 #include "base/win/registry.h"
27 #include "base/win/scoped_co_mem.h"
28 #include "chrome/browser/platform_util_internal.h"
29 #include "content/public/browser/browser_thread.h"
30 #include "ui/base/win/shell.h"
31 #include "ui/gfx/native_widget_types.h"
34 using content::BrowserThread;
36 namespace platform_util {
40 void ShowItemInFolderOnWorkerThread(const base::FilePath& full_path) {
41 base::ScopedBlockingCall scoped_blocking_call(FROM_HERE,
42 base::BlockingType::MAY_BLOCK);
43 base::FilePath dir = full_path.DirName().AsEndingWithSeparator();
44 // ParseDisplayName will fail if the directory is "C:", it must be "C:\\".
48 Microsoft::WRL::ComPtr<IShellFolder> desktop;
49 HRESULT hr = SHGetDesktopFolder(&desktop);
53 base::win::ScopedCoMem<ITEMIDLIST> dir_item;
54 hr = desktop->ParseDisplayName(NULL, NULL,
55 const_cast<wchar_t *>(dir.value().c_str()),
56 NULL, &dir_item, NULL);
60 base::win::ScopedCoMem<ITEMIDLIST> file_item;
61 hr = desktop->ParseDisplayName(NULL, NULL,
62 const_cast<wchar_t *>(full_path.value().c_str()),
63 NULL, &file_item, NULL);
67 const ITEMIDLIST* highlight[] = {file_item};
69 // Skip opening the folder during browser tests, to avoid leaving an open
70 // file explorer window behind.
71 if (!platform_util::internal::AreShellOperationsAllowed())
74 hr = SHOpenFolderAndSelectItems(dir_item, std::size(highlight), highlight, 0);
76 // On some systems, the above call mysteriously fails with "file not
77 // found" even though the file is there. In these cases, ShellExecute()
78 // seems to work as a fallback (although it won't select the file).
79 if (hr == ERROR_FILE_NOT_FOUND) {
80 ShellExecute(NULL, L"open", dir.value().c_str(), NULL, NULL, SW_SHOW);
82 LOG(WARNING) << " " << __func__ << "(): Can't open full_path = \""
83 << full_path.value() << "\""
84 << " hr = " << logging::SystemErrorCodeToString(hr);
89 void OpenExternalOnWorkerThread(const GURL& url) {
90 base::ScopedBlockingCall scoped_blocking_call(FROM_HERE,
91 base::BlockingType::MAY_BLOCK);
92 // Quote the input scheme to be sure that the command does not have
93 // parameters unexpected by the external program. This url should already
95 std::string escaped_url = url.spec();
96 escaped_url.insert(0, "\"");
99 // According to Mozilla in uriloader/exthandler/win/nsOSHelperAppService.cpp:
100 // "Some versions of windows (Win2k before SP3, Win XP before SP1) crash in
101 // ShellExecute on long URLs (bug 161357 on bugzilla.mozilla.org). IE 5 and 6
102 // support URLS of 2083 chars in length, 2K is safe."
104 // It may be possible to increase this. https://crbug.com/727909
105 const size_t kMaxUrlLength = 2048;
106 if (escaped_url.length() > kMaxUrlLength)
109 // Specify %windir%\system32 as the CWD so that any new proc spawned does not
110 // inherit this proc's CWD. Without this, uninstalls may be broken by a
111 // long-lived child proc that holds a handle to the browser's version
112 // directory (the browser's CWD). A process's CWD is in the standard list of
113 // directories to search when loading a DLL, and precedes the system directory
114 // when safe DLL search mode is disabled (not the default). Setting the CWD to
115 // the system directory is a nice way to mitigate a potential DLL search order
116 // hijack for processes that don't implement their own mitigation.
117 base::FilePath system_dir;
118 base::PathService::Get(base::DIR_SYSTEM, &system_dir);
119 if (reinterpret_cast<ULONG_PTR>(ShellExecuteA(
120 NULL, "open", escaped_url.c_str(), NULL,
121 system_dir.AsUTF8Unsafe().c_str(), SW_SHOWNORMAL)) <= 32) {
122 // On failure, it may be good to display a message to the user.
123 // https://crbug.com/727913
130 void ShowItemInFolder(Profile* profile, const base::FilePath& full_path) {
131 base::ThreadPool::CreateCOMSTATaskRunner(
132 {base::MayBlock(), base::TaskPriority::USER_BLOCKING})
133 ->PostTask(FROM_HERE,
134 base::BindOnce(&ShowItemInFolderOnWorkerThread, full_path));
139 void PlatformOpenVerifiedItem(const base::FilePath& path, OpenItemType type) {
140 // May result in an interactive dialog.
141 base::ScopedBlockingCall scoped_blocking_call(FROM_HERE,
142 base::BlockingType::MAY_BLOCK);
145 ui::win::OpenFileViaShell(path);
149 ui::win::OpenFolderViaShell(path);
154 } // namespace internal
156 void OpenExternal(const GURL& url) {
157 DCHECK_CURRENTLY_ON(BrowserThread::UI);
159 base::ThreadPool::CreateCOMSTATaskRunner(
160 {base::MayBlock(), base::TaskPriority::USER_BLOCKING})
161 ->PostTask(FROM_HERE, base::BindOnce(&OpenExternalOnWorkerThread, url));
164 } // namespace platform_util