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  • c#爬虫-1688官网自动登录

背景

在1688官网里面有很多信息是需要登录才能看得到的,比如商家的联系电话等等。那么我们在抓取它的网页的时候,肯定是需要维持登录状态才能得到对应的内容。这里面就会涉及到自动登录的问题。

登录地址

https://login.1688.com/member/signin.htm

图片

自动登录方法

1、找到对应的元素,账号、密码框。

图片

2、把账号、密码值带进去。

  List<string> logininfolist = new List<string>();
                string file = "1688Account.json";
                if (!File.Exists(file))
                {
                    throw new ArgumentException("1688Account  not found");
                }
                string data = File.ReadAllText(file, Encoding.UTF8);
                var account1688list = JsonConvert.DeserializeObject<List<Account1688Item>>(data);
                logininfolist.AddRange(account1688list.Select(o => o.AccountPassword).ToList());
                Random rdinfo = new Random();
                int indexinfo = rdinfo.Next(logininfolist.Count);
                var modelinfo = logininfolist[indexinfo];
                driver.FindElement(By.Id("fm-login-id")).SendKeys(modelinfo.Split('+')[0]);
                driver.FindElement(By.Id("fm-login-password")).SendKeys(modelinfo.Split('+')[1]);

3、模拟点击提交按钮操作。

     // Thread.Sleep(1000 * 30); //30时间操作
                driver.FindElement(By.ClassName("password-login")).Click();
                Thread.Sleep(1000 * 30);//30时间操作

4、进入控制台,验证是否登陆成功。并记录Cookies,下次再来的时候,直接使用现成的Cookies,一般有效期可以维持一天多左右。

  driver.Navigate().GoToUrl("https://work.1688.com/?tracelog=login_target_is_blank_1688");
                Thread.Sleep(1000 * 5);
                if (driver.Url.Contains("login.1688.com"))
                {
                    Console.WriteLine("登录失败");
                    CookieHelp.DeleteCookies();
                    Console.WriteLine("2");
                    throw new Exception("重新登录");
                }
                driver.Navigate().Refresh();
                CookieHelp.WriteCookies(driver.Manage().Cookies.AllCookies);

5、判断是否有现成的登录cookies。

   driver.Navigate().GoToUrl("https://www.1688.com/");
            driver.Manage().Cookies.DeleteAllCookies();
            var listCookie = CookieHelp.GetCookie();
            if (listCookie != null)
            {
                logintry = 0;
                Console.WriteLine("有现成cookies" + DateTime.UtcNow);
                foreach (var item in listCookie)
                {
                    driver.Manage().Cookies.AddCookie(new Cookie(item.Name, item.Value, item.Domain, item.Path, item.Expiry));
                }
                Thread.Sleep(2000);
                driver.Navigate().GoToUrl("https://work.1688.com/?tracelog=login_target_is_blank_1688");
                Thread.Sleep(1000 * 2);

完整代码

  /// <summary>
        /// 登录  todo
        /// </summary>
        /// <param name="_reptilesImageSearchService"></param>
        /// <param name="options"></param>
        /// <param name="driver"></param>
        public void Implement(IReptilesImageSearchService _reptilesImageSearchService, IWebDriver driver)
        {
            driver.Navigate().GoToUrl("https://www.1688.com/");
            driver.Manage().Cookies.DeleteAllCookies();
            var listCookie = CookieHelp.GetCookie();
            if (listCookie != null)
            {
                logintry = 0;
                Console.WriteLine("有现成cookies" + DateTime.UtcNow);
                foreach (var item in listCookie)
                {
                    driver.Manage().Cookies.AddCookie(new Cookie(item.Name, item.Value, item.Domain, item.Path, item.Expiry));
                }
                Thread.Sleep(2000);
                driver.Navigate().GoToUrl("https://work.1688.com/?tracelog=login_target_is_blank_1688");
                Thread.Sleep(1000 * 2);
                if (driver.Url.Contains("login.1688.com"))
                {
                    Console.WriteLine("cookies过期了");
                    CookieHelp.DeleteCookies();
                    Console.WriteLine("1");
                    throw new Exception("重新登录");
                }
            }
            else
            {
                if (logintry > 4)
                {
                    Console.WriteLine("登陆次数超出:" + logintry);
                    throw new Exception("登陆次数超出,退出");
                }
                logintry++;
                Console.WriteLine("无现成cookies" + DateTime.UtcNow);
                driver.Navigate().GoToUrl("https://login.1688.com/member/signin.htm");
                #region 登录动作
                driver.SwitchTo().Frame(0);
                IJavaScriptExecutor js = (IJavaScriptExecutor)driver;
                //  string returnjs = (string)js.ExecuteScript("Object.defineProperties(navigator, {webdriver:{get:()=>undefined}});");
                string jsfile = File.ReadAllText("stealth.min.js", Encoding.UTF8);
                string returnjs = (string)js.ExecuteScript(jsfile);
                List<string> logininfolist = new List<string>();
                string file = "1688Account.json";
                if (!File.Exists(file))
                {
                    throw new ArgumentException("1688Account  not found");
                }
                string data = File.ReadAllText(file, Encoding.UTF8);
                var account1688list = JsonConvert.DeserializeObject<List<Account1688Item>>(data);
                logininfolist.AddRange(account1688list.Select(o => o.AccountPassword).ToList());
                Random rdinfo = new Random();
                int indexinfo = rdinfo.Next(logininfolist.Count);
                var modelinfo = logininfolist[indexinfo];
                driver.FindElement(By.Id("fm-login-id")).SendKeys(modelinfo.Split('+')[0]);
                driver.FindElement(By.Id("fm-login-password")).SendKeys(modelinfo.Split('+')[1]);
                // Thread.Sleep(1000 * 30); //30时间操作
                driver.FindElement(By.ClassName("password-login")).Click();
                Thread.Sleep(1000 * 30);//30时间操作
                #endregion 登录动作
                driver.Navigate().GoToUrl("https://work.1688.com/?tracelog=login_target_is_blank_1688");
                Thread.Sleep(1000 * 5);
                if (driver.Url.Contains("login.1688.com"))
                {
                    Console.WriteLine("登录失败");
                    CookieHelp.DeleteCookies();
                    Console.WriteLine("2");
                    throw new Exception("重新登录");
                }
                driver.Navigate().Refresh();
                CookieHelp.WriteCookies(driver.Manage().Cookies.AllCookies);
            }
            Thread.Sleep(1000);
        }

注意事项

1、登录的时候,有时候会出现滑块验证码,这时候一般是使用其他账号重试或者是在当前的机器手工登录一次,后面基本就会被信任。

2、使用这段代码本身就是模拟真实用户的行为,最大限度的减少验证码出现的几率。

   IJavaScriptExecutor js = (IJavaScriptExecutor)driver;
                //  string returnjs = (string)js.ExecuteScript("Object.defineProperties(navigator, {webdriver:{get:()=>undefined}});");
                string jsfile = File.ReadAllText("stealth.min.js", Encoding.UTF8);
                string returnjs = (string)js.ExecuteScript(jsfile);
原文:https://www.cnblogs.com/lyl6796910/p/14382304.html

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