博客园客户端UAP开发随笔 -- 让自己的App连接世界:WinRT中的微博分享

近年来社交app可谓红红火火,大家每天发微博,分享到朋友圈也是不亦乐乎。我们的Universal应用自然也希望加入社交分享的功能。然而国内主流的社交平台微博和微信还没有推出适用于Universal应用的SDK,怎么办呢?当然敲碗等开饭也是办法,另一方面我们也可以自己做一些努力。今天我们就想分享一下我们在Universal应用中实现分享到微博功能上的探索。

准备

想要分享到微博,先得注册成为微博开发者。我们在https://open.weibo.com/上注册好开发者账号,建立个测试应用,就可以拿到我们的App key和App secret了,准备工作就是这样。

做一些努力

下面就是SDK的问题了,其实微博是有一个官方开源的for Windows 8 SDK的,还是基于Windows RunTime的。这个SDK的下载地址是https://weibowinrtsdk.codeplex.com/

我们的Universal 应用不也是基于Windows RunTime的吗?是不是通用呢?先把它的代码下载下来吧。在https://weibowinrtsdk.codeplex.com/SourceControl/latest 页面点download,下载下来的内容包括说明文档,SDK的源码,还有一个例子程序。

打开WeiboSDKForWinRT.sln,我们可以看到微博SDK原来是for Windows 8的:

点击一下 重定目标到Windows 8.1, 确定。好了,我们的SDK已经是for Windows 8.1的了:

那我们的Universal应用还有Windows Phone 8.1 怎么办呢?理想的情况是我们在目标里加上Windows Phone 8.1 就可以了,先这么做试试看:

点击 更改… ,勾选Windows Phone 8.1

确定

添加好了,SDK项目的后缀也变成了 可移植的。

马上就在 Universal应用里试一试吧。在解决方案里新建个Universal 应用,引用上我们的SDK。

先从Windows 8.1 应用开始吧,调用代码可以从例子程序里copy一些。

我们在空白的MainPage页面上加个button,点击可以调用微博SDK授权并发一条纯文字微博:

MainPage.xaml:

<Page

x:Class="App1.MainPage"

xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="https://schemas.microsoft.com/winfx/2006/xaml"

xmlns:local="using:App1"

xmlns:d="https://schemas.microsoft.com/expression/blend/2008"

xmlns:mc="https://schemas.openxmlformats.org/markup-compatibility/2006"

mc:Ignorable="d">

 

<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">

<Button Content="Button" HorizontalAlignment="Left" Margin="252,140,0,0" VerticalAlignment="Top" Click="Button_Click"/>

<TextBlock x:Name="statusRun" HorizontalAlignment="Left" Margin="294,249,0,0" TextWrapping="Wrap" Text="TextBlock" VerticalAlignment="Top" Height="23" RenderTransformOrigin="0.5,0.5" Width="644">

</TextBlock>

<TextBlock x:Name="ResultRun" HorizontalAlignment="Left" Margin="280.991,346.281,0,0" TextWrapping="Wrap" Text="TextBlock" VerticalAlignment="Top" RenderTransformOrigin="0.5,0.5" Height="123.454" UseLayoutRounding="False" Width="308.332" d:LayoutRounding="Auto">

</TextBlock>

</Grid>

</Page>

 

MainPage.xaml.cs:

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using System.Runtime.InteropServices.WindowsRuntime;

using WeiboSDKForWinRT;

using Windows.Foundation;

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;

 

// "空白页"项模板在 https://go.microsoft.com/fwlink/?LinkId=234238 上提供

 

namespace App2

{

/// <summary>

/// 可独立使用或用于导航至 Frame 内部的空白页。

/// </summary>

public sealed partial class MainPage : Page

{

public MainPage()

{

this.InitializeComponent();

InitData();

}

 

private void InitData()

{

// TODO:编译运行之前需要开放平台参数.

SdkData.AppKey = "132125341";

SdkData.AppSecret = "55cee081b74dabb1b53bf3b9a9bfa208";

SdkData.RedirectUri = "https://api.weibo.com/oauth2/default.html";

 

// prepare the pic to be shared.

}

/// <summary>

/// Invoked when this page is about to be displayed in a Frame.

/// </summary>

/// <param name="e">Event data that describes how this page was reached. The Parameter

/// property is typically used to configure the page.</param>

protected override void OnNavigatedTo(NavigationEventArgs e)

{

var oauthClient = new ClientOAuth();

// 判断是否已经授权或者授权是否过期.

if (oauthClient.IsAuthorized == false)

{

oauthClient.LoginCallback += (isSucces, err, response) =>

{

if (isSucces)

{

// TODO: deal the OAuth result.

this.statusRun.Text = "Congratulations, Authorized successfully!";

this.ResultRun.Text = string.Format("AccesssToken:{0}, ExpriesIn:{1}, Uid:{2}",

response.AccessToken, response.ExpriesIn, response.Uid);

}

else

{

// TODO: handle the err.

this.statusRun.Text = err.errMessage;

}

};

oauthClient.BeginOAuth();//异步方法,如果需要在之后执行代码,请加到上面的LoginCallback中

}

}

private async void Button_Click(object sender, RoutedEventArgs e)

{

var engine = new SdkNetEngine();

ISdkCmdBase cmdBase = new CmdPostMessage()

{

Status = "test for post message without picture"

};

 

var result = await engine.RequestCmd(SdkRequestType.POST_MESSAGE, cmdBase);

if (result.errCode == SdkErrCode.SUCCESS)

{

this.ResultRun.Text = result.content;

this.statusRun.Text = "Post a message without picture successed!";

}

else

{

// TODO: deal the error.

this.statusRun.Text = "Post a message without picture failed!";

}

}

}

}

中间这里注意填上我们之前得到的App key和App secret:

SdkData.AppKey = "";

SdkData.AppSecret = "";

SdkData.RedirectUri = "";

RedirectUri 也是个比较重要的参数,一般情况下填 https://api.weibo.com/oauth2/default.html ,填错了服务器会返回错误。参见https://open.weibo.com/wiki/%E5%B8%B8%E8%A7%81%E9%97%AE%E9%A2%98 的faq:

 

Q:获取用户授权是出现 error :redirect_uri_mismatch 怎么解决?

A:这是由于回调地址填写错误造成的,解决办法:

  • 站内应用:redirect_uri等于应用信息中的"站内应用地址"而非"应用实际地址";
  • 其他应用:redirect_uri需与https://open.weibo.com/apps/30871*****/info/advanced (30871*****替换成你应用的AppKey)应用高级信息中的"应用回调页"完全匹配或在绑定的域名下。

注意:修改应用回调页或绑定域名后需要约半小时左右时间生效。

 

接下来就可以运行啦:

输入微博账号,就可以给我们的Windows 8.1应用授权了:(这里有点要注意的,如果我们的应用没有提交并通过审核的话,只能用自己的账号给应用授权)

现在可以点击一下button:

哈哈,成功了。看看我们的微博,是不是多了一条:

这样子Windows 8.1应用的分享到微博就基本搞定啦,下面我们看看Windows Phone 8.1应用的。

继续努力

先尝试一下在Windows Phone 8.1应用中照Windows 8.1应用的方法调用微博SDK:

出错咯。原来 WebAuthenticationBroker.AuthenticateAsync 这个方法在Windows Phone 8.1 上没有实现 -_-|||。赶紧查查资料,原来Windows Phone 8.1上要使用 WebAuthenticationBroker.AuthenticateAndContinue 这个方法。参见 https://code.msdn.microsoft.com/windowsapps/Web-Authentication-d0485122

简单的说就是调用 WebAuthenticationBroker.AuthenticateAndContinue 方法以后,会暂时跳出我们的Windows Phone 8.1 应用,在系统提供的一个专门的空间内得到WebAuthenticationResult,再通过我们的Windows Phone 8.1 应用的onActive事件将其传回应用,再根据WebAuthenticationResult的结果继续调用ContinueWebAuthentication进行下一步的认证工作。

这样一来我们的SDK代码为了适应Universal 应用的Windows 应用和Windows Phone 应用就有了分歧,这正是条件编译派上用场的时候了。

我们将ClientOAuth.cs中的 GetAuthorizeCode 方法替换为如下:

/// <summary>

/// 授权获取authorize_code.

/// </summary>

private async void GetAuthorizeCode()

{

string oauthUrl = string.Format("{0}/oauth2/authorize?client_id={1}&response_type=code&redirect_uri={2}&display=mobile"

, Constants.ServerUrl2_0, SdkData.AppKey, SdkData.RedirectUri);

 

Uri startUri = new Uri(oauthUrl, UriKind.Absolute);

Uri endUri = new Uri(SdkData.RedirectUri, UriKind.Absolute);

 

// 调出认证页面.

#if WINDOWS_PHONE_APP

WebAuthenticationBroker.AuthenticateAndContinue(startUri, endUri);

#else

var authenResult = await WebAuthenticationBroker.AuthenticateAsync(WebAuthenticationOptions.None, startUri, endUri);

switch (authenResult.ResponseStatus)

{

case WebAuthenticationStatus.Success:

{

string authorize_code = string.Empty;

var data = authenResult.ResponseData;

authorize_code = SdkUility.GetQueryParameter(data, "code");

if (string.IsNullOrEmpty(authorize_code) == false)

{

Authorize(authorize_code);

}

}

break;

case WebAuthenticationStatus.UserCancel:

{

SdkAuthError err = new SdkAuthError();

err.errCode = SdkErrCode.USER_CANCEL;

err.errMessage = Constants.SdkMsg.OAuthUserCanceled;

if (null != LoginCallback)

LoginCallback(false, err, null);

}

break;

case WebAuthenticationStatus.ErrorHttp:

default:

{

SdkAuthError err = new SdkAuthError();

err.errCode = SdkErrCode.NET_UNUSUAL;

err.errMessage = Constants.SdkMsg.NetException;

if (null != LoginCallback)

LoginCallback(false, err, null);

}

break;

}

#endif

}

public void continueAuth(WebAuthenticationResult authenResult)

{

switch (authenResult.ResponseStatus)

{

case WebAuthenticationStatus.Success:

{

string authorize_code = string.Empty;

var data = authenResult.ResponseData;

 

authorize_code = SdkUility.GetQueryParameter(data, "code");

 

if (string.IsNullOrEmpty(authorize_code) == false)

{

Authorize(authorize_code);

}

}

break;

case WebAuthenticationStatus.UserCancel:

{

SdkAuthError err = new SdkAuthError();

err.errCode = SdkErrCode.USER_CANCEL;

err.errMessage = Constants.SdkMsg.OAuthUserCanceled;

 

if (null != LoginCallback)

LoginCallback(false, err, null);

}

break;

case WebAuthenticationStatus.ErrorHttp:

default:

{

SdkAuthError err = new SdkAuthError();

err.errCode = SdkErrCode.NET_UNUSUAL;

err.errMessage = Constants.SdkMsg.NetException;

 

if (null != LoginCallback)

LoginCallback(false, err, null);

}

break;

}

}

现在我们的SDK的条件编译还没有生效,我们需要新建一个For Windows Phone的SDK:

把我们原有SDK的文件添加为链接:

注意CmdModel 下的文件,以及RestSharp.winmd 的引用也要加进来。还有我们的程序集名称因为新建项目的原因变化了,也得改回去。

改为

现在把Windows Phone 8.1应用的引用替换成WeiboSDKForWinRTPhone的。

接下来就可以果断地借鉴例子程序Web authentication broker sample 了,把它的ContinuationManager.cs拷贝过来。参见 https://code.msdn.microsoft.com/windowsapps/Web-Authentication-d0485122

让 MainPage 实现 IWebAuthenticationContinuable 的接口:

public sealed partial class MainPage : Page, IWebAuthenticationContinuable

再给 MainPage 加上个实现 IWebAuthenticationContinuable 接口中 ContinueWebAuthentication进行下一步的方法:

public void ContinueWebAuthentication (WebAuthenticationBrokerContinuationEventArgs ex)

{

var oauthClient = new ClientOAuth();

oauthClient.LoginCallback += (isSucces, err, response) =>

{

if (isSucces)

{

// TODO: deal the OAuth result.

this.statusRun.Text = "Congratulations, Authorized successfully!";

this.ResultRun.Text = string.Format("AccesssToken:{0}, ExpriesIn:{1}, Uid:{2}",

response.AccessToken, response.ExpriesIn, response.Uid);

}

else

{

// TODO: handle the err.

this.statusRun.Text = " Authorized Failed!";

this.ResultRun.Text = err.errMessage;

}

};

oauthClient.continueAuth(ex.WebAuthenticationResult);

}

最后处理一下App.xaml.cs中的 事件:

#if WINDOWS_PHONE_APP

ContinuationManager continuationManager;

/// <summary>

/// Handle OnActivated event to deal with File Open/Save continuation activation kinds

/// </summary>

/// <param name="e">Application activated event arguments, it can be casted to proper sub-type based on ActivationKind</param>

protected override void OnActivated(IActivatedEventArgs e)

{

base.OnActivated(e);

 

continuationManager = new ContinuationManager();

 

Frame rootFrame = Window.Current.Content as Frame;

 

// Do not repeat app initialization when the Window already has content,

// just ensure that the window is active

if (rootFrame == null)

{

// Create a Frame to act as the navigation context and navigate to the first page

rootFrame = new Frame();

// Place the frame in the current Window

Window.Current.Content = rootFrame;

}

 

if(rootFrame.Content == null)

{

rootFrame.Navigate(typeof(MainPage));

}

 

var continuationEventArgs = e as IContinuationActivatedEventArgs;

if (continuationEventArgs != null)

{

// Call ContinuationManager to handle continuation activation

continuationManager.Continue(continuationEventArgs, rootFrame);

}

 

Window.Current.Activate();

}

#endif

赶紧运行看看:

好吧,又出错了。看起来是跳转到应用外失败了,是不是我们太早跳转了呢?把OnNavigatedTo中的授权的过程放到 Page 的 Loaded 事件里试试吧:

仍然不行,那只有采用延迟的办法了:

private async void Page_Loaded(object sender, RoutedEventArgs e)

{

await Task.Delay(1000);

var oauthClient = new ClientOAuth();

// 判断是否已经授权或者授权是否过期.

if (oauthClient.IsAuthorized == false)

{

oauthClient.LoginCallback += (isSucces, err, response) =>

{

if (isSucces)

{

// TODO: deal the OAuth result.

this.statusRun.Text = "Congratulations, Authorized successfully!";

this.ResultRun.Text = string.Format("AccesssToken:{0}, ExpriesIn:{1}, Uid:{2}",

response.AccessToken, response.ExpriesIn, response.Uid);

}

else

{

// TODO: handle the err.

this.statusRun.Text = err.errMessage;

}

};

oauthClient.BeginOAuth();

}

}

再看看行不行?

好了,终于大功告成。

结尾

我们这个修改过的微博SDK可以在https://code.msdn.microsoft.com/windowsapps/Share-To-Weibo-in-c99da5fa 找到。其中难免会有一些Bug,欢迎大家指正。

分享代码,改变世界!

Windows Phone Store App link:

https://www.windowsphone.com/zh-cn/store/app/博客园-uap/500f08f0-5be8-4723-aff9-a397beee52fc

Windows Store App link:

https://apps.microsoft.com/windows/zh-cn/app/c76b99a0-9abd-4a4e-86f0-b29bfcc51059

GitHub open source link:

https://github.com/MS-UAP/cnblogs-UAP

MSDN Sample Code:

https://code.msdn.microsoft.com/CNBlogs-Client-Universal-477943ab