本文告诉大家如何模拟登陆csdn,这个方法可以用于模拟登陆其他网站。

我们可以使用下面代码让 HttpClient 使用 Cookie ,有了这个才可以保存登陆,不然登陆成功下次访问网页还是没登陆。

            CookieContainer cookies = new CookieContainer();

            HttpClientHandler handler = new HttpClientHandler();
            handler.CookieContainer = cookies;
            HttpClient http = new HttpClient(handler);

虽然已经有Cookie,但是还缺少一些请求需要带的头,因为浏览器是会告诉网站,需要的Accept,为了假装这是一个浏览器,所以就需要添加AcceptAccept-Encoding Accept-Language User-Agent

添加 Accept

下面的代码可以添加Accept,这里后面的字符串可以自己使用浏览器查看,复制。

            http.DefaultRequestHeaders.TryAddWithoutValidation("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8");

添加 Accept-Encoding

            http.DefaultRequestHeaders.TryAddWithoutValidation("Accept-Encoding", "gzip, deflate, br");

如果有 gzip 就需要解压,这个现在不太好弄,建议不要加。

添加 Accept-Language

            http.DefaultRequestHeaders.TryAddWithoutValidation("Accept-Language", "zh-CN,zh;q=0.8");

添加 User-Agent

http.DefaultRequestHeaders.TryAddWithoutValidation("User-Agent", "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36");

更多User-Agent请看win10 uwp 如何让WebView标识win10手机

ContentType

如果设置 ContentType 需要在发送的内容进行添加

            content = new StringContent("{\"loginName\":\"lindexi\",\"password\":\"csdn\",\"autoLogin\":false}")
            {
                Headers = { ContentType = new MediaTypeHeaderValue("application/json") }
            };

发送数据

如果需要使用 Post 或 get 发送数据,那么可以使用HttpContent做出数据,提供的类型有StringContentFormUrlEncodedContent等。

其中StringContent最简单,而FormUrlEncodedContent可以自动转换。

            str = $"username={account.UserName}&password={account.Key}&lt={lt}&execution={execution}&_eventId=submit";
            str = str.Replace("@", "%40");

            HttpContent content = new StringContent(str, Encoding.UTF8);

上面代码就是使用 StringContent 可以看到需要自己转换特殊字符,当然一个好的方法是使用 urlencoding 转换。

如果使用FormUrlEncodedContent就不需要做转换

          content=new FormUrlEncodedContent(new List<KeyValuePair<string, string>>()
            {
                new KeyValuePair<string, string>("username",account.UserName),
                new KeyValuePair<string, string>("password",account.Key),
                new KeyValuePair<string, string>("lt",lt),
                new KeyValuePair<string, string>("execution",execution),
                new KeyValuePair<string, string>("_eventId","submit")
            });

如果需要上传文件,那么需要使用MultipartFormDataContent

            content = new MultipartFormDataContent();
            ((MultipartFormDataContent)content).Headers.Add("name", "file1");
           
            ((MultipartFormDataContent)content).Headers.Add("filename", "20170114120751.png");
            var stream = new StreamContent(await File.OpenStreamForReadAsync());
            ((MultipartFormDataContent)content).Add(stream);

登陆方法

打开 https://passport.csdn.net/account/login 可以看到这个界面

右击查看源代码,可以拿到上传需要使用的两个变量 lt 和 execution

在登陆的时候,使用 post 把账号密码、lt execution 上传就可以登陆

模拟登陆csdn

于是下面就是模拟登陆

  1. 获得账号信息

         AccountCimage account = AppId.AccoutCimage;
    
  2. cookie

         CookieContainer cookies = new CookieContainer();
    
         HttpClientHandler handler = new HttpClientHandler();
         handler.CookieContainer = cookies;
         HttpClient http = new HttpClient(handler);
    
  3. 获得登陆需要的流水号

         var url = new Uri("https://passport.csdn.net/account/login");
       
         http.DefaultRequestHeaders.TryAddWithoutValidation("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8");
         //http.DefaultRequestHeaders.TryAddWithoutValidation("Accept-Encoding", "gzip, deflate, br");
         http.DefaultRequestHeaders.TryAddWithoutValidation("Accept-Language", "zh-CN,zh;q=0.8");
         http.DefaultRequestHeaders.TryAddWithoutValidation("User-Agent", "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36");
    
    
         handler.UseCookies = true;
         handler.AllowAutoRedirect = true;
    
         string str = await http.GetStringAsync(url);
         Regex regex = new Regex(" type=\"hidden\" name=\"lt\" value=\"([\\w|\\-]+)\"");
         var lt = regex.Match(str).Groups[1].Value;
         regex = new Regex("type=\"hidden\" name=\"execution\" value=\"(\\w+)\"");
         var execution = regex.Match(str).Groups[1].Value;
    
  4. 登陆

         str = $"username={account.UserName}&password={account.Key}&lt={lt}&execution={execution}&_eventId=submit";
         str = str.Replace("@", "%40");
    
         HttpContent content = new StringContent(str, Encoding.UTF8);
    
      
         str = await content.ReadAsStringAsync();
         content=new FormUrlEncodedContent(new List<KeyValuePair<string, string>>()
         {
             new KeyValuePair<string, string>("username",account.UserName),//.Replace("@", "%40")),
             new KeyValuePair<string, string>("password",account.Key),
             new KeyValuePair<string, string>("lt",lt),
             new KeyValuePair<string, string>("execution",execution),
             new KeyValuePair<string, string>("_eventId","submit")
         });
         str = await content.ReadAsStringAsync();
    
         str = await (await http.PostAsync(url, content)).Content.ReadAsStringAsync();
    
  5. 查看登陆

    url = new Uri(“http://write.blog.csdn.net/”); str = await http.GetStringAsync(url);

  6. 上传文件

        content = new MultipartFormDataContent();
         ((MultipartFormDataContent)content).Headers.Add("name", "file1");
           
         ((MultipartFormDataContent)content).Headers.Add("filename", "20170114120751.png");
         var stream = new StreamContent(await File.OpenStreamForReadAsync());
         ((MultipartFormDataContent)content).Add(stream);
         str = await ((MultipartFormDataContent)content).ReadAsStringAsync();
         url = new Uri("http://write.blog.csdn.net/article/UploadImgMarkdown?parenthost=write.blog.csdn.net");
         var message = await http.PostAsync(url, content);
         if (message.StatusCode == HttpStatusCode.OK)
         {
             ResponseImage(message);
         }
    
      private async void ResponseImage(HttpResponseMessage message)
      {
         using (MemoryStream memoryStream = new MemoryStream())
         {
             int length = 1024;
             byte[] buffer = new byte[length];
             using (GZipStream zip = new GZipStream(await message.Content.ReadAsStreamAsync(), CompressionLevel.Optimal))
             {
                 int n;
                 while ((n = zip.Read(buffer, 0, length)) > 0)
                 {
                    memoryStream.Write(buffer, 0, n);
                 }
             }
    
             using (StreamReader stream = new StreamReader(memoryStream))
             {
                 string str = stream.ReadToEnd();
             }
         }
     }
    

使用 WebView 模拟登陆 csdn

下面给大家一个叫简单方法模拟登陆csdn

          GeekWebView.Navigate(new Uri("http://passport.csdn.net/"));

            GeekWebView.NavigationCompleted += OnNavigationCompleted;


            F = async () =>
            {

                var functionString = string.Format(@"document.getElementsByName('username')[0].value='{0}';", "lindexi_gd@163.com");
                await GeekWebView.InvokeScriptAsync("eval", new string[] { functionString });
                functionString = string.Format(@"document.getElementsByName('password')[0].value='{0}';", "密码");
                await GeekWebView.InvokeScriptAsync("eval", new string[] { functionString });

                functionString = string.Format(@"document.getElementsByClassName('logging')[0].click();");
                await GeekWebView.InvokeScriptAsync("eval", new string[] { functionString });
            };

        private Action F { set; get; }

        private void OnNavigationCompleted(WebView sender, WebViewNavigationCompletedEventArgs args)
        {
            F();
        }

当然,这时需要修改登陆信息,我上面写的是我的。如果遇到有验证码,那么这个方法是不可使用,因为输入验证码暂时还没法做。


本文会经常更新,请阅读原文: https://lindexi.gitee.io/lindexi/post/win10-uwp-httpClient-%E7%99%BB%E9%99%86CSDN.html ,以避免陈旧错误知识的误导,同时有更好的阅读体验。

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