使用C＃获取当前选项卡的URL从谷歌浏览器 [英] Getting the current tab's URL from Google Chrome using C#

问题描述

曾经有一种方法使用 FindWindowEx 中使用 SendMessage函数目前打电话来获取文本中的网址列。最近的（？）更新似乎已经打破了这种方法，因为Chrome浏览器似乎是现在的渲染一切工作。 （你可以用间谍检查++，AHK窗口间谍或Window侦探）

There used to be a way to get the active tab's URL from Google Chrome by using FindWindowEx in combination with a SendMessage call to get the text currently in the omnibox. A recent (?) update seems to have broken this method, since Chrome seems to be rendering everything itself now. (You can check with Spy++, AHK Window Spy or Window Detective)

要获得Firefox和Opera当前的URL，可以使用DDE和 WWW_GetWindowInfo 。这似乎并不可能在Chrome（了吗？）。

To get the current URL on Firefox and Opera, you can use DDE and WWW_GetWindowInfo. This doesn't seem to be possible on Chrome (anymore?).

这个问题有关于它如何使用工作，这是这件作品的详细信息的答案code的（正如我所解释的，不工作了 - hAddressBox 是 0 ）

This question has an answer with more info about how it used to work, which is this piece of code (which, as I explained, doesn't work anymore - hAddressBox is 0):

var hAddressBox = FindWindowEx(
    intPtr,
    IntPtr.Zero,
    "Chrome_OmniboxView",
    IntPtr.Zero);

var sb = new StringBuilder(256);
SendMessage(hAddressBox, 0x000D, (IntPtr)256, sb);
temp = sb.ToString();

所以我的问题是：是否有一个的新的的方式来获得当前焦点选项卡的网址是什么？ （只是标题是不够的）

So my question is: Is there a new way to get the currently focused tab's URL? (Just the title is not enough)

推荐答案

以下code似乎工作，（感谢icemanind的评论），但是却是资源密集型。大约需要350毫秒找到elmUrlBar ...有点慢。

The following code seems to work, (thanks to icemanind's comment) but is however resource intensive. It takes about 350ms to find elmUrlBar... a little slow.

更何况我们有多个合作铬在同一时间运行的进程的问题。

Not to mention that we have the problem of working with multiple chrome processes running at the same time.

// there are always multiple chrome processes, so we have to loop through all of them to find the
// process with a Window Handle and an automation element of name "Address and search bar"
Process[] procsChrome = Process.GetProcessesByName("chrome");
foreach (Process chrome in procsChrome) {
  // the chrome process must have a window
  if (chrome.MainWindowHandle == IntPtr.Zero) {
    continue;
  }

  // find the automation element
  AutomationElement elm = AutomationElement.FromHandle(chrome.MainWindowHandle);
  AutomationElement elmUrlBar = elm.FindFirst(TreeScope.Descendants,
    new PropertyCondition(AutomationElement.NameProperty, "Address and search bar"));

  // if it can be found, get the value from the URL bar
  if (elmUrlBar != null) {
    AutomationPattern[] patterns = elmUrlBar.GetSupportedPatterns();
    if (patterns.Length > 0) {
      ValuePattern val = (ValuePattern)elmUrlBar.GetCurrentPattern(patterns[0]);
      Console.WriteLine("Chrome URL found: " + val.Current.Value);
    }
  }
}

编辑：我不开心与上面的方法速度慢，所以我把它快（50ms的现在），并增加了一些网址验证，以确保我们得到的东西，而不是在用户正确的URL可能会在网络上搜索，或者仍然在网址忙打字。这里的code：

I wasn't happy with the slow method above, so I made it faster (now 50ms) and added some URL validation to make sure we got the correct URL instead of something the user might be searching for on the web, or still being busy typing in the URL. Here's the code:

// there are always multiple chrome processes, so we have to loop through all of them to find the
// process with a Window Handle and an automation element of name "Address and search bar"
Process[] procsChrome = Process.GetProcessesByName("chrome");
foreach (Process chrome in procsChrome) {
  // the chrome process must have a window
  if (chrome.MainWindowHandle == IntPtr.Zero) {
    continue;
  }

  // find the automation element
  AutomationElement elm = AutomationElement.FromHandle(chrome.MainWindowHandle);

  // manually walk through the tree, searching using TreeScope.Descendants is too slow (even if it's more reliable)
  AutomationElement elmUrlBar = null;
  try {
    // walking path found using inspect.exe (Windows SDK) for Chrome 31.0.1650.63 m (currently the latest stable)
    var elm1 = elm.FindFirst(TreeScope.Children, new PropertyCondition(AutomationElement.NameProperty, "Google Chrome"));
    if (elm1 == null) { continue; } // not the right chrome.exe
    // here, you can optionally check if Incognito is enabled:
    //bool bIncognito = TreeWalker.RawViewWalker.GetFirstChild(TreeWalker.RawViewWalker.GetFirstChild(elm1)) != null;
    var elm2 = TreeWalker.RawViewWalker.GetLastChild(elm1); // I don't know a Condition for this for finding :(
    var elm3 = elm2.FindFirst(TreeScope.Children, new PropertyCondition(AutomationElement.NameProperty, ""));
    var elm4 = elm3.FindFirst(TreeScope.Children, new PropertyCondition(AutomationElement.ControlTypeProperty, ControlType.ToolBar));
    elmUrlBar = elm4.FindFirst(TreeScope.Children, new PropertyCondition(AutomationElement.ControlTypeProperty, ControlType.Custom));
  } catch {
    // Chrome has probably changed something, and above walking needs to be modified. :(
    // put an assertion here or something to make sure you don't miss it
    continue;
  }

  // make sure it's valid
  if (elmUrlBar == null) {
    // it's not..
    continue;
  }

  // elmUrlBar is now the URL bar element. we have to make sure that it's out of keyboard focus if we want to get a valid URL
  if ((bool)elmUrlBar.GetCurrentPropertyValue(AutomationElement.HasKeyboardFocusProperty)) {
    continue;
  }

  // there might not be a valid pattern to use, so we have to make sure we have one
  AutomationPattern[] patterns = elmUrlBar.GetSupportedPatterns();
  if (patterns.Length == 1) {
    string ret = "";
    try {
      ret = ((ValuePattern)elmUrlBar.GetCurrentPattern(patterns[0])).Current.Value;
    } catch { }
    if (ret != "") {
      // must match a domain name (and possibly "https://" in front)
      if (Regex.IsMatch(ret, @"^(https:\/\/)?[a-zA-Z0-9\-\.]+(\.[a-zA-Z]{2,4}).*$")) {
        // prepend http:// to the url, because Chrome hides it if it's not SSL
        if (!ret.StartsWith("http")) {
          ret = "http://" + ret;
        }
        Console.WriteLine("Open Chrome URL found: '" + ret + "'");
      }
    }
    continue;
  }
}

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