使用 C# 从 Google Chrome 获取当前标签的 URL [英] Getting the current tab's URL from Google Chrome using C#

问题描述

过去有一种方法可以通过使用 FindWindowEx 结合 SendMessage 调用从 Google Chrome 获取活动标签的 URL，以获取当前在多功能框中的文本.最近的 (?) 更新似乎破坏了这种方法，因为 Chrome 现在似乎正在渲染所有内容.(您可以使用 Spy++、AHK Window Spy 或 Window Detective 进行检查)

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)

要在 Firefox 和 Opera 上获取当前 URL，您可以使用 DDE 和 WWW_GetWindowInfo.这在 Chrome 上似乎不可能(现在?).

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?).

这个问题有一个答案，其中包含有关它过去如何工作的更多信息，这就是这篇文章代码(正如我所解释的，它不再起作用 - 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:有没有一种新方法来获取当前聚焦的标签的 URL?(光是标题还不够)

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

似乎我在这里的答案中的代码不再起作用(尽管使用 AutomationElement 仍然有效)适用于更高版本的 Chrome 版本，因此请查看不同版本的其他答案.例如，这是 Chrome 54 的一个:https://stackoverflow.com/a/40638519/377618

Seems like the code in my answer here does not work anymore (though the idea of using AutomationElement does still work) for the later Chrome versions, so look through the other answers for different versions. For example, here's one for Chrome 54: https://stackoverflow.com/a/40638519/377618

以下代码似乎有效(感谢 icemanind 的评论)，但需要大量资源.找到elmUrlBar大约需要350ms……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.

更不用说我们遇到了同时运行多个 chrome 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);
    }
  }
}

我对上面的慢速方法不满意，所以我让它更快(现在是 50 毫秒)并添加了一些 URL 验证以确保我们得到正确的 URL 而不是用户的东西可能正在网上搜索，或者仍在忙于输入 URL.代码如下:

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;
  }
}

这篇关于使用 C# 从 Google Chrome 获取当前标签的 URL的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！