windows phone 8.1教务在线客户端(后续)
程序员文章站
2022-03-23 12:27:08
经过了一番折腾,这个wp教务在线算是告一段落了,其实原理很简单,就是post方式访问登陆页面返回cookie,然后带着这个cookie用get方式继续访问你想要访问并取回内容的页面,而且httpclient会默认保存cookie的,这个关键我一开始就没搞清,以至于走了弯路,, ok,这个项目我只是登 ......
经过了一番折腾,这个wp教务在线算是告一段落了,其实原理很简单,就是post方式访问登陆页面返回cookie,然后带着这个cookie用get方式继续访问你想要访问并取回内容的页面,而且httpclient会默认保存cookie的,这个关键我一开始就没搞清,以至于走了弯路,,
ok,这个项目我只是登陆并且获取了我想要的html内容,至于解析html,可以用正则表达式,等以后有时间再研究吧
下面是源码:
1 using Windows.UI.Xaml.Controls.Primitives; 2 using Windows.UI.Xaml.Data; 3 using Windows.UI.Xaml.Input; 4 using Windows.UI.Xaml.Media; 5 using Windows.UI.Xaml.Navigation; 6 using Windows.Web.Http;
10 namespace App 11 { 15 public sealed partial class MainPage : Page 16 { 17 public MainPage() 18 { 19 this.InitializeComponent(); 20 21 this.NavigationCacheMode = NavigationCacheMode.Required; 22 } 23 29 protected override void OnNavigatedTo(NavigationEventArgs e) 30 { 38 } 39 //点击登陆按钮 40 private async void button_Click(object sender, RoutedEventArgs e) 41 { 42 //这个uri是抓包获得的,就是那个带有post请求的uri 43 var uri = "xxx"; 44 var values = new List<KeyValuePair<string, string>>();
//这个键值对也是抓包获得的,就是你的用户名和密码填上 45 values.Add(new KeyValuePair<string, string>("自己的用户名", "xxxxx")); 46 values.Add(new KeyValuePair<string, string>("自己的密码", "xxxxxx")); 47 string response = await App.httpClientHelper.Post(new Uri(uri), values); 48 //string responsetext = await response.Content.ReadAsStringAsync(); 49 //这个uri是你想获得返回内容的uri 50 var _uri = "你想访问的uri"; 51 string _response = await App.httpClientHelper.Get(new Uri(_uri)); 52 Frame.Navigate(typeof(BlankPage1), _response); 53 } 54 } 55 }
<Page x:Class="App.MainPage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="using:App" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"> <Grid> <Button x:Name="button" Content="Login" Click="button_Click" HorizontalAlignment="Left" Margin="232,292,0,0" VerticalAlignment="Top"/> <TextBox x:Name="textBox1" HorizontalAlignment="Left" Margin="201,138,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="166"/> <TextBlock x:Name="textBlock" HorizontalAlignment="Left" Margin="43,138,0,0" TextWrapping="Wrap" Text="Name" FontSize="30" VerticalAlignment="Top" Height="39" Width="116"/> <TextBox x:Name="passwordBox" HorizontalAlignment="Left" Margin="201,218,0,0" VerticalAlignment="Top" Width="166"/> <TextBlock x:Name="textBlock1" HorizontalAlignment="Left" Margin="43,218,0,0" TextWrapping="Wrap" Text="Password" FontSize="22" VerticalAlignment="Top" Height="39" Width="93"/> </Grid> </Page>
这个是个空页面,里面放着所返回的html源码:
using Windows.Foundation.Collections; using Windows.UI.Xaml; using Windows.UI.Xaml.Controls; using Windows.UI.Xaml.Controls.Primitives; using Windows.UI.Xaml.Data; using Windows.UI.Xaml.Input; using Windows.UI.Xaml.Media; using Windows.UI.Xaml.Navigation; namespace App { public sealed partial class BlankPage1 : Page { public BlankPage1() { this.InitializeComponent(); }
protected override void OnNavigatedTo(NavigationEventArgs e) { textBox.Text = e.Parameter.ToString(); } } }
<Page x:Class="App.BlankPage1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="using:App" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"> <Grid> <TextBox x:Name="textBox" HorizontalAlignment="Left" Margin="55,69,0,0" TextWrapping="Wrap" VerticalAlignment="Top" RenderTransformOrigin="-3.716,-0.387" Height="217" Width="301" BorderThickness="0.1"/> </Grid> </Page>
这是自定义的httpClienthelper类:
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using Windows.Web.Http; namespace App { public class HttpClientHelper { private HttpClient httpClient; public HttpClientHelper() { httpClient = new HttpClient(); } public async Task<string> Post(Uri uri, IList<KeyValuePair<string, string>> postcontent) { string responseText = string.Empty; HttpResponseMessage response = await httpClient.PostAsync(uri, new HttpFormUrlEncodedContent(postcontent)); responseText = await response.Content.ReadAsStringAsync(); return responseText; } public async Task<string> Get(Uri uri) { string responseText = string.Empty; HttpResponseMessage response = await httpClient.GetAsync(uri); responseText = await response.Content.ReadAsStringAsync(); return responseText; } } }
一定别忘了在app.xaml.cs里实例化这个httpClientHelper实例:
public static HttpClientHelper httpClientHelper = new HttpClientHelper();
好了,这只是基本的原理展示,这是我学习windows phone的一个小尝试。