chrome/browser/chrome_process_finder_win.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/chrome_process_finder_win.h"
   6
   7 #include <shellapi.h>
   8 #include <string>
   9
  10 #include "base/command_line.h"
  11 #include "base/files/file_path.h"
  12 #include "base/files/file_util.h"
  13 #include "base/logging.h"
  14 #include "base/process/process.h"
  15 #include "base/process/process_info.h"
  16 #include "base/strings/string_number_conversions.h"
  17 #include "base/strings/stringprintf.h"
  18 #include "base/strings/utf_string_conversions.h"
  19 #include "base/win/message_window.h"
  20 #include "base/win/metro.h"
  21 #include "base/win/scoped_handle.h"
  22 #include "base/win/win_util.h"
  23 #include "base/win/windows_version.h"
  24 #include "chrome/browser/metro_utils/metro_chrome_win.h"
  25 #include "chrome/common/chrome_constants.h"
  26 #include "chrome/common/chrome_switches.h"
  27
  28
  29 namespace {
  30
  31 const int kTimeoutInSeconds = 20;
  32
  33 // The following is copied from net/base/escape.cc. We don't want to depend on
  34 // net here because this gets compiled into chrome.exe to facilitate
  35 // fast-rendezvous (see https://codereview.chromium.org/14617003/).
  36
  37 // TODO(koz): Move these functions out of net/base/escape.cc into base/escape.cc
  38 // so we can depend on it directly.
  39
  40 // BEGIN COPY from net/base/escape.cc
  41
  42 // A fast bit-vector map for ascii characters.
  43 //
  44 // Internally stores 256 bits in an array of 8 ints.
  45 // Does quick bit-flicking to lookup needed characters.
  46 struct Charmap {
  47   bool Contains(unsigned char c) const {
  48     return ((map[c >> 5] & (1 << (c & 31))) != 0);
  49   }
  50
  51   uint32 map[8];
  52 };
  53
  54 const char kHexString[] = "0123456789ABCDEF";
  55 inline char IntToHex(int i) {
  56   DCHECK_GE(i, 0) << i << " not a hex value";
  57   DCHECK_LE(i, 15) << i << " not a hex value";
  58   return kHexString[i];
  59 }
  60
  61 // Given text to escape and a Charmap defining which values to escape,
  62 // return an escaped string.  If use_plus is true, spaces are converted
  63 // to +, otherwise, if spaces are in the charmap, they are converted to
  64 // %20.
  65 std::string Escape(const std::string& text, const Charmap& charmap,
  66                    bool use_plus) {
  67   std::string escaped;
  68   escaped.reserve(text.length() * 3);
  69   for (unsigned int i = 0; i < text.length(); ++i) {
  70     unsigned char c = static_cast<unsigned char>(text[i]);
  71     if (use_plus && ' ' == c) {
  72       escaped.push_back('+');
  73     } else if (charmap.Contains(c)) {
  74       escaped.push_back('%');
  75       escaped.push_back(IntToHex(c >> 4));
  76       escaped.push_back(IntToHex(c & 0xf));
  77     } else {
  78       escaped.push_back(c);
  79     }
  80   }
  81   return escaped;
  82 }
  83
  84 // Everything except alphanumerics and !'()*-._~
  85 // See RFC 2396 for the list of reserved characters.
  86 static const Charmap kQueryCharmap = {{
  87   0xffffffffL, 0xfc00987dL, 0x78000001L, 0xb8000001L,
  88   0xffffffffL, 0xffffffffL, 0xffffffffL, 0xffffffffL
  89 }};
  90
  91 std::string EscapeQueryParamValue(const std::string& text, bool use_plus) {
  92   return Escape(text, kQueryCharmap, use_plus);
  93 }
  94
  95 // END COPY from net/base/escape.cc
  96
  97 }  // namespace
  98
  99 namespace chrome {
 100
 101 HWND FindRunningChromeWindow(const base::FilePath& user_data_dir) {
 102   return base::win::MessageWindow::FindWindow(user_data_dir.value());
 103 }
 104
 105 NotifyChromeResult AttemptToNotifyRunningChrome(HWND remote_window,
 106                                                 bool fast_start) {
 107   DCHECK(remote_window);
 108   static const char kSearchUrl[] =
 109       "http://www.google.com/search?q=%s&sourceid=chrome&ie=UTF-8";
 110   DWORD process_id = 0;
 111   DWORD thread_id = GetWindowThreadProcessId(remote_window, &process_id);
 112   if (!thread_id || !process_id)
 113     return NOTIFY_FAILED;
 114
 115   base::CommandLine command_line(*base::CommandLine::ForCurrentProcess());
 116   command_line.AppendSwitchASCII(
 117       switches::kOriginalProcessStartTime,
 118       base::Int64ToString(
 119           base::CurrentProcessInfo::CreationTime().ToInternalValue()));
 120
 121   if (fast_start)
 122     command_line.AppendSwitch(switches::kFastStart);
 123
 124   // Send the command line to the remote chrome window.
 125   // Format is "START\0<<<current directory>>>\0<<<commandline>>>".
 126   std::wstring to_send(L"START\0", 6);  // want the NULL in the string.
 127   base::FilePath cur_dir;
 128   if (!base::GetCurrentDirectory(&cur_dir))
 129     return NOTIFY_FAILED;
 130   to_send.append(cur_dir.value());
 131   to_send.append(L"\0", 1);  // Null separator.
 132   to_send.append(command_line.GetCommandLineString());
 133   to_send.append(L"\0", 1);  // Null separator.
 134
 135   // Allow the current running browser window to make itself the foreground
 136   // window (otherwise it will just flash in the taskbar).
 137   ::AllowSetForegroundWindow(process_id);
 138
 139   COPYDATASTRUCT cds;
 140   cds.dwData = 0;
 141   cds.cbData = static_cast<DWORD>((to_send.length() + 1) * sizeof(wchar_t));
 142   cds.lpData = const_cast<wchar_t*>(to_send.c_str());
 143   DWORD_PTR result = 0;
 144   if (::SendMessageTimeout(remote_window,
 145                            WM_COPYDATA,
 146                            NULL,
 147                            reinterpret_cast<LPARAM>(&cds),
 148                            SMTO_ABORTIFHUNG,
 149                            kTimeoutInSeconds * 1000,
 150                            &result)) {
 151     return result ? NOTIFY_SUCCESS : NOTIFY_FAILED;
 152   }
 153
 154   // It is possible that the process owning this window may have died by now.
 155   if (!::IsWindow(remote_window))
 156     return NOTIFY_FAILED;
 157
 158   // If the window couldn't be notified but still exists, assume it is hung.
 159   return NOTIFY_WINDOW_HUNG;
 160 }
 161
 162 }  // namespace chrome