从通用Windows平台（UWP）应用程序发送通知到Azure通知集线器

Question

正如标题所示，我需要发送通知从 UWP应用程序（用C＃编写）到我的Azure集线器（并从那里发送到我已经创建了一个Android应用程序）。我明显使用GCM来发送推送通知给我的Android应用程序。

搜索我还没有找到一个单一的教程，会在一定程度是有用的，因为他们大多数用在为了一个控制台应用程序发送通知，而不是一个通用的Windows平台的应用程序的无数个小时后。

如果任何人都可以请帮我，我会真的感谢。

Answer 1

我会在这里回答我的问题，因为很多人有这种奋斗像我这样的。因此，这是一个通过Azure通知中心将通知从通用Windows平台（UWP）发送到Android应用程序（使用GCM）的代码。

请注意，必须稍微改变代码为它在自己通知中心（参见代码中的注释了解详细信息）

using System; 
using System.Collections.Generic; 
using System.IO; 
using System.Linq; 
using System.Net.Http; 
using System.Runtime.InteropServices.WindowsRuntime; 
using System.Text; 
using Windows.Foundation; 
using Windows.Foundation.Collections; 
using Windows.Security.Cryptography; 
using Windows.Security.Cryptography.Core; 
using Windows.Storage.Streams; 
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 SendNotification 
{ 
    public sealed partial class MainPage : Page 
    { 
     public MainPage() 
     { 
      this.InitializeComponent(); 
      this.sendNotification(); 
     } 

     string Endpoint = ""; 
     string SasKeyName = ""; 
     string SasKeyValue = ""; 

     public void ConnectionStringUtility(string connectionString) 
     { 
      //Parse Connectionstring 
      char[] separator = { ';' }; 
      string[] parts = connectionString.Split(separator); 
      for (int i = 0; i < parts.Length; i++) 
      { 
       if (parts[i].StartsWith("Endpoint")) 
        Endpoint = "https" + parts[i].Substring(11); 
       if (parts[i].StartsWith("SharedAccessKeyName")) 
        SasKeyName = parts[i].Substring(20); 
       if (parts[i].StartsWith("SharedAccessKey")) 
        SasKeyValue = parts[i].Substring(16); 
      } 
     } 


     public string getSaSToken(string uri, int minUntilExpire) 
     { 
      string targetUri = Uri.EscapeDataString(uri.ToLower()).ToLower(); 

      // Add an expiration in seconds to it. 
      long expiresOnDate = DateTime.Now.Ticks/TimeSpan.TicksPerMillisecond; 
      expiresOnDate += minUntilExpire * 60 * 1000; 
      long expires_seconds = expiresOnDate/1000; 
      String toSign = targetUri + "\n" + expires_seconds; 

      // Generate a HMAC-SHA256 hash or the uri and expiration using your secret key. 
      MacAlgorithmProvider macAlgorithmProvider = MacAlgorithmProvider.OpenAlgorithm(MacAlgorithmNames.HmacSha256); 
      BinaryStringEncoding encoding = BinaryStringEncoding.Utf8; 
      var messageBuffer = CryptographicBuffer.ConvertStringToBinary(toSign, encoding); 
      IBuffer keyBuffer = CryptographicBuffer.ConvertStringToBinary(SasKeyValue, encoding); 
      CryptographicKey hmacKey = macAlgorithmProvider.CreateKey(keyBuffer); 
      IBuffer signedMessage = CryptographicEngine.Sign(hmacKey, messageBuffer); 

      string signature = Uri.EscapeDataString(CryptographicBuffer.EncodeToBase64String(signedMessage)); 

      return "SharedAccessSignature sr=" + targetUri + "&sig=" + signature + "&se=" + expires_seconds + "&skn=" + SasKeyName; 
     } 


     public async void sendNotification() 
     { 
      //insert your HubFullAccess here (a string that can be copied from the Azure Portal by clicking Access Policies on the Settings blade for your notification hub) 
      ConnectionStringUtility("YOURHubFullAccess"); 

      //replace YOURHUBNAME with whatever you named your notification hub in azure 
      var uri = Endpoint + "YOURHUBNAME" + "/messages/?api-version=2015-01"; 
      string json = "{\"data\":{\"message\":\"" + "Hello World!" + "\"}}"; 


      //send an HTTP POST request 
      using (var httpClient = new HttpClient()) 
      { 
       var request = new HttpRequestMessage(HttpMethod.Post, uri); 
       request.Content = new StringContent(json); 

       request.Headers.Add("Authorization", getSaSToken(uri, 1000)); 
       request.Headers.Add("ServiceBusNotification-Format", "gcm"); 
       var response = await httpClient.SendAsync(request); 
       await response.Content.ReadAsStringAsync(); 
      } 
     } 
    } 
} 

Answer 2

您可以使用通知中心的REST API可以从任何地方在香草HTTP/HTTPS（后端或设备）推送通知。

有一个样品（使用Java客户端）位置：https://msdn.microsoft.com/en-us/library/azure/dn495628.aspx

和API参考这里：https://msdn.microsoft.com/en-us/library/azure/dn495827.aspx