如何在 CefSharp WinForms C# 中阻止/限制特定的 URL

Question

希望你们都做得很好。

我在 C# 的 WindowsForm 中使用 CefSharp 创建了 Web 浏览器。 现在我想限制/阻止特定的 URL 在浏览器中呈现，因为除了一些隐私之外，我不想限制任何东西，只想限制特定的 URL 并且我无法找到解决方案如何做到这一点在 Winform C# 中。 请通过分享一段代码来帮助我如何做到这一点。

我的代码在这里，不知道如何限制 URL 没有添加任何类型的代码来限制

    public partial class Browser : Form
    {
        public Browser()
        {
            InitializeComponent();
        }

        private void Browser_Load(object sender, EventArgs e)
        { 
            CefSettings settings = new CefSettings();
            //Initialization
            Cef.Initialize(settings);
            var url = "https://www.humanatic.com/pages/humfun/login.cfm";
            ChromiumWebBrowser chrome = new ChromiumWebBrowser(url);
            chrome.Parent = tabControl.SelectedTab;
            chrome.Dock = DockStyle.Fill;
        }

        private void BtnBack_Click(object sender, EventArgs e)
        {
            ChromiumWebBrowser chrome = tabControl.SelectedTab.Controls[0] as ChromiumWebBrowser;
            if (chrome != null)
            {
                if (chrome.CanGoBack)
                    chrome.Back();
            }
        }

        private void btnForward_Click(object sender, EventArgs e)
        {
            ChromiumWebBrowser chrome = tabControl.SelectedTab.Controls[0] as ChromiumWebBrowser;
            if (chrome != null)
            {
                if (chrome.CanGoForward)
                    chrome.Forward();
            }
        }

        private void BtnRefresh_Click(object sender, EventArgs e)
        {
            ChromiumWebBrowser chrome = tabControl.SelectedTab.Controls[0] as ChromiumWebBrowser;
            if (chrome != null)
                chrome.Refresh();
        }

        private void BtnNewTab_Click(object sender, EventArgs e)
        {
            TabPage tab = new TabPage();
            tab.Text = "New Tab";
            tabControl.Controls.Add(tab);
            tabControl.SelectTab(tabControl.TabCount - 1);
            ChromiumWebBrowser chrome = new ChromiumWebBrowser("https://www.google.com");
            chrome.Parent = tab;
            chrome.Dock = DockStyle.Fill;
            chrome.TitleChanged += Chrome_TitleChanged;
        }

        private void Chrome_TitleChanged(object sender, TitleChangedEventArgs e)
        {
            this.Invoke(new MethodInvoker(() =>
            {
                tabControl.SelectedTab.Text = e.Title;
            }));
        }

        private void Browser_MouseClick(object sender, MouseEventArgs e)
        {
            if(e.Button == MouseButtons.Right)
            {
                MessageBox.Show("No Permission!");
            }
        }
    }
}

Answer 1

API 文档在这里。

//Cancel loading of a Url
public class CustomRequestHandler : CefSharp.Handler.RequestHandler
{
    protected override bool OnBeforeBrowse(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, bool userGesture, bool isRedirect)
    {
        //For security reasons you should perform validation on the url to confirm that it's safe before proceeding.
        if (request.Url.StartsWith("http://www.google.com"))
        {
            //Cancel the request
            return true;
        }
        return base.OnBeforeBrowse(chromiumWebBrowser, browser, frame, request, userGesture, isRedirect);
    }
}

browser.RequestHandler = new CustomRequestHandler();