cefsharp - 使用 CefSharp 检测某些关键字时如何停止连续加载

Question

我现在正在使用浏览器构建应用程序，当用户输入 URL 时，我的程序将首先检测 URL 是否会重定向到其他链接。如果我的程序检测到重定向 URL 包含一些关键字，它将停止加载页面并返回到主程序。

我已经知道我已经实现了 IRequestHandler 来获取重定向 URL，但是我不知道如何停止连续加载页面并保存状态然后返回到主程序。请帮忙谢谢

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

using System.Threading;

namespace Chrome
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            InitBrowser();
        }

        private Thread m_ThreadDetect;
        public ChromiumWebBrowser browser;
        public void InitBrowser()
        {
            var setting = new CefSettings();
            setting.CachePath = "/BrowserCache";
            setting.PersistSessionCookies = true;
            Cef.Initialize(setting);
            browser = new ChromiumWebBrowser("www.testing.com")
            {
                RequestHandler = new MyRequestHandler()
            };
            this.panel1.Controls.Add(browser);
            browser.Dock = DockStyle.Fill;
        }

        private void button_go_Click(object sender, EventArgs e)
        {
            if (String.IsNullOrEmpty(textBox_URL.Text) || textBox_URL.Text.Equals("about:blank"))
            {
                MessageBox.Show("Enter a valid URL.");
                textBox_URL.Focus();
                return;
            }

            browser.Load(textBox_URL.Text);
            ///////////////////////////////////////
            //Check whether the browser already catch the keyword in here
             ///////////////////////////
        }

        private void button_search_Click(object sender, EventArgs e)
        {
            browser.Find(0, textBox_search.Text, true, false, false);
        }


        private async Task getSource()
        {
            string htmlText = await browser.GetBrowser().MainFrame.GetSourceAsync();
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Threading.Tasks;
using CefSharp;
using System.Collections;
using System.Windows.Forms;
using System.Collections.Specialized;

namespace Chrome
{
    class MyRequestHandler : IRequestHandler
    {
        public bool CanGetCookies(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request)
        {
            //throw new NotImplementedException();
            return true;
        }

        public bool CanSetCookie(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, Cookie cookie)
        {
            //throw new NotImplementedException();
            return true;
        }

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

        public IResponseFilter GetResourceResponseFilter(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, IResponse response)
        {
            Console.WriteLine("GetResourceResponseFilter");
            //throw new NotImplementedException();
            return null;
        }

        public bool OnBeforeBrowse(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, bool userGesture, bool isRedirect)
        {
            //throw new NotImplementedException();

            Console.WriteLine("OnBeforeBrowse");
            Console.WriteLine("OnBeforeBrowse, isRedirect"+ isRedirect);
            return false;
        }

        public CefReturnValue OnBeforeResourceLoad(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, IRequestCallback callback)
        {
            //throw new NotImplementedException();
            Console.WriteLine("OnBeforeResourceLoad");
            return CefReturnValue.Continue;
        }

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

        public bool OnOpenUrlFromTab(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, string targetUrl, WindowOpenDisposition targetDisposition, bool userGesture)
        {
            throw new NotImplementedException();
        }

        public void OnPluginCrashed(IWebBrowser chromiumWebBrowser, IBrowser browser, string pluginPath)
        {
            throw new NotImplementedException();
        }

        public bool OnProtocolExecution(IWebBrowser chromiumWebBrowser, IBrowser browser, string url)
        {
            throw new NotImplementedException();
        }

        public bool OnQuotaRequest(IWebBrowser chromiumWebBrowser, IBrowser browser, string originUrl, long newSize, IRequestCallback callback)
        {
            throw new NotImplementedException();
        }

        public void OnRenderProcessTerminated(IWebBrowser chromiumWebBrowser, IBrowser browser, CefTerminationStatus status)
        {
            throw new NotImplementedException();
        }

        public void OnRenderViewReady(IWebBrowser chromiumWebBrowser, IBrowser browser)
        {
            //throw new NotImplementedException();
        }

        public void OnResourceLoadComplete(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, IResponse response, UrlRequestStatus status, long receivedContentLength)
        {
            Console.WriteLine("OnResourceLoadComplete");
            //throw new NotImplementedException();
        }

        public void OnResourceRedirect(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, IResponse response, ref string newUrl)
        {
            //Console.WriteLine(response.Headers);

            //detect keyword
            if(location.Equals("Redirect"))
            {
                chromiumWebBrowser.Stop();
                Console.WriteLine("Detect Stop");
            }

            Console.WriteLine("Done");

            Console.WriteLine("OnResourceRedirect");
            Console.WriteLine(newUrl);
            //throw new NotImplementedException();
        }

        public bool OnResourceResponse(IWebBrowser chromiumWebBrowser, IBrowser browser, IFrame frame, IRequest request, IResponse response)
        {
            //throw new NotImplementedException();
            Console.WriteLine("here");
            return false;
        }

        public bool OnSelectClientCertificate(IWebBrowser chromiumWebBrowser, IBrowser browser, bool isProxy, string host, int port, X509Certificate2Collection certificates, ISelectClientCertificateCallback callback)
        {
            throw new NotImplementedException();
        }
    }
}

标签： cefsharp