c# cefsharp截取request 代码

使用 CefSharp 截取请求的代码如下：

using CefSharp;
using CefSharp.WinForms;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace CefSharpExample
{
    public partial class MainForm : Form
    {
        private ChromiumWebBrowser browser;

        public MainForm()
        {
            InitializeComponent();

            InitializeChromium();
        }

        private void InitializeChromium()
        {
            CefSettings settings = new CefSettings();
            settings.CachePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "CefSharp\\Cache");

            Cef.Initialize(settings);

            browser = new ChromiumWebBrowser("https://www.google.com");

            browser.FrameLoadEnd += Browser_FrameLoadEnd;
            browser.RequestHandler = new RequestHandler();
            browser.Dock = DockStyle.Fill;

            this.Controls.Add(browser);
        }

        private void Browser_FrameLoadEnd(object sender, FrameLoadEndEventArgs e)
        {
            if (e.Frame.IsMain)
            {
                browser.ExecuteScriptAsync("alert('Page loaded.');");
            }
        }

        public class RequestHandler : IRequestHandler
        {
            public bool OnBeforeBrowse(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, bool isRedirect)
            {
                return false;
            }

            public bool OnBeforeResourceLoad(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, IRequestCallback callback)
            {
                Console.WriteLine(request.Url);

                return false;
            }

            public bool GetAuthCredentials(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, bool isProxy, string host, int port, string realm, string scheme, IAuthCallback callback)
            {
                return false;
            }

            public bool OnCertificateError(IWebBrowser chromiumWebBrowser, IBrowser browser, CefErrorCode errorCode, string requestUrl, ISslInfo sslInfo, IRequestCallback callback)
            {
                return false;
            }

            public void OnPluginCrashed(IWebBrowser chromiumWebBrowser, IBrowser browser, string pluginPath)
            {
            }

            public CefReturnValue OnBeforeResourceLoad(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, IResourceRequestCallback callback)
            {
                return CefReturnValue.Continue;
            }

            public bool OnResourceResponse(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, IResponse response)
            {
                return false;
            }

            public void OnRenderProcessTerminated(IWebBrowser chromiumWebBrowser, IBrowser browser, CefTerminationStatus status)
            {
            }

            public bool OnQuotaRequest(IWebBrowser chromiumWebBrowser, IBrowser browser, string originUrl, long newSize, IRequestCallback callback)
            {
                return false;
            }

            public void OnResourceRedirect(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, IResponse response, ref string newUrl)
            {
            }

            public bool OnProtocolExecution(IWebBrowser chromiumWebBrowser, IBrowser browser, string url)
            {
                return false;
            }

            public void OnRenderViewReady(IWebBrowser chromiumWebBrowser, IBrowser browser)
            {
            }

            public bool OnResourceLoadComplete(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, IResponse response, UrlRequestStatus status, long receivedContentLength)
            {
                return false;
            }

            public void OnResourceLoadComplete(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, IResponse response, HttpStatusCode status)
            {
            }

            public void OnProtocolExecutionComplete(IWebBrowser chromiumWebBrowser, IBrowser browser, string url, bool wasSuccessful)
            {
            }

            public bool OnBeforeBrowse(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, bool userGesture, bool isRedirect)
            {
                return false;
            }

            public void OnDocumentAvailableInMainFrame(IWebBrowser chromiumWebBrowser, IBrowser browser)
            {
            }

            public void OnFrameAttached(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame)
            {
            }

            public void OnFrameDetached(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame)
            {
            }

            public void OnPluginCrashed(IWebBrowser chromiumWebBrowser, IBrowser browser, string pluginPath, string pluginVersion)
            {
            }

            public void OnRenderFrameReady(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame)
            {
            }

            public bool OnResourceRedirect(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, IResponse response)
            {
                return false;
            }
        }
    }
}

在这个例子中，我们创建了一个 `ChromiumWebBrowser` 控件并访问了 Google 主页。我们在 `RequestHandler` 类中实现了 `OnBeforeResourceLoad` 方法来截取请求，并在控制台输出请求的 URL。