使用C＃从Google Chrome获取当前标签页的URL

Z时代
2024-01-10
分类：问答

过去，有一种方法可以FindWindowEx结合使用SendMessage调用来获取多功能框中当前显示的文字，从而从Google

Chrome浏览器中获取活动标签的网址。最近的（？）更新似乎已破坏了此方法，因为Chrome似乎现在正在呈现所有内容。（您可以使用Spy ++，AHK

Window Spy或Window Detective进行检查）

要在Firefox和Opera上获取当前URL，可以使用DDE和WWW_GetWindowInfo。Chrome似乎无法做到这一点（不再吗？）。

这个问题的答案提供了有关它如何工作的更多信息，这是这段代码（正如我所解释的，它不再起作用- hAddressBox是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：是否有一种新方法来获取当前关注的选项卡的URL？（仅标题还不够）

回答：

看来我的答案中的代码不再AutomationElement适用于更高版本的Chrome版本（尽管使用的想法仍然有效），因此请查看其他答案以查找不同版本。例如，以下是适用于Chrome

54的设备：https :

//stackoverflow.com/a/40638519/377618

以下代码似乎有效（由于icemanind的评论），但是却占用大量资源。找到elmUrlBar大约需要350毫秒…有点慢。

更不用说我们有chrome同时运行多个进程的问题。

// 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);
    }
  }
}

我对上面的慢速方法不满意，所以我使其速度更快（现在为50ms）并添加了一些URL验证，以确保获得正确的URL，而不是用户可能在网络上搜索的URL，或者仍然正在忙于输入URL。这是代码：

// 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;
  }
}