LaunchOptions options = new LaunchOptions
                {
                    Headless = true,
                    ExecutablePath = @".local-chromium\Win64-901912\chrome-win\chrome.exe",
                    Args = new[] {
                    string.Format("--proxy-server={0}",ip),
                    
 
"--start-maximized",//最大視窗
                    "--disable-infobars",//--隱藏自動化標題
                    "--no-sandbox",
                    "–single-process",
                    "–disable-gpu",
                    "--disable-setuid-sandbox",
                    "--ignore-certificate-errors",
                    
 
"--app=https://www.baidu.com/"
                },
                    IgnoreHTTPSErrors = true
                };
                using (var browser = await Puppeteer.LaunchAsync(options))
                {
                    try
                    {
                        string userAgent = UAList[new
 
 Random().Next(0, UAList.Count())];
                        var newPage = await browser.NewPageAsync();
                        newPage.DefaultTimeout = 15000;
                        await newPage.SetUserAgentAsync(userAgent);
                        ViewPortOptions vOptions = new ViewPortOptions
                        {
                            Width = 1920,
                            Height = 1080
                        };
                        await newPage.SetViewportAsync(vOptions);
                        //隱藏webdriver特徵
                        await newPage.EvaluateExpressionOnNewDocumentAsync("delete navigator.__proto__.webdriver;");
                        foreach (var href in link)
                        {
                            try
                            {
                                Stopwatch sw = new Stopwatch();
                                sw.Start();
                                await newPage.GoToAsync(href, WaitUntilNavigation.DOMContentLoaded);
                                var jsSelectAllAnchors = @"Array.from(document.querySelectorAll('.p-card-href')).map(a => a.href);";
                                var urls = await newPage.EvaluateExpressionAsync<string[]>(jsSelectAllAnchors);
                                if (urls != null && urls.Where(a => a.Contains("b2bsearch/jump?url")).Count() > 0)
                                {
                                    string[] filter_urls = urls.Where(a => a.Contains("b2bsearch/jump?url")).ToArray();
                                    string productUrl = filter_urls[new Random().Next(0, filter_urls.Count())];
                                    await newPage.GoToAsync(productUrl, WaitUntilNavigation.DOMContentLoaded);
                                    await ScrollPage(newPage, 500, 800, 3, 200, 800);
                                }
                                sw.Stop();
                                Console.WriteLine("耗時:" + sw.ElapsedMilliseconds + "ms");
                            }
                            catch (Exception ex)
                            {
                                Console.WriteLine("當前開啟頁面連結異常:" + ex.Message);
                                if (ex.Message.Contains("ERR_TUNNEL_CONNECTION_FAILED") || ex.Message.Contains("ERR_PROXY_CONNECTION_FAILED"))
                                {
                                    await browser.CloseAsync();//關閉瀏覽器
                                                               //重新執行任務
                                    var d = Task.Run(() => TaskRun(link.Skip(link.IndexOf(href)).ToList()));
                                    d.Wait();
                                    return;
                                }
                            }
                        }
                        if (newPage != null && !newPage.IsClosed)
                        {
                            await newPage.CloseAsync();
                        }
                        if (browser != null && !browser.IsClosed)
                        {
                            await browser.CloseAsync();//關閉瀏覽器
                        }
                        Console.WriteLine("全部任務已完成....");
                    }
                    catch (Exception ex)
                    {
                        Console.WriteLine("global:" + ex.Message);
                        if (browser != null && !browser.IsClosed)
                        {
                            await browser.CloseAsync();
                            var d = Task.Run(() => TaskRun(link));//遞迴執行
                            d.Wait();
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message + ";" + ex.InnerException);
            }

        }
        /// <summary>
        /// 模擬滾動頁面
        /// </summary>
        /// <param name="page">當前頁面</param>
        /// <param name="times">次數</param>
        /// <returns></returns>
        async static Task ScrollPage(Page page, int minPix, int maxPix, int times, int minSleep = 1000, int maxSleep = 2000)
        {
            Func<Task> scroll = null;
            int i = 0;
            scroll = new Func<Task>(async () =>
            {
                int top = new Random().Next(minPix, maxPix);
                await page.EvaluateExpressionAsync("window.scrollBy({top:" + top + ",behavior:'smooth'})");
                Thread.Sleep(new Random().Next(minSleep, maxSleep));
                i++;
                if (i < times)
                {
                    await scroll();
                }
            });
            await scroll();
            //再向上隨機滾動
            await page.EvaluateExpressionAsync("window.scrollBy({top:" + (0 - new Random().Next(500, 1500)) + ",behavior:'smooth'})");
        }