Azure MobileApp:InvokeApAsync因InvalidOperationException失败

Question

我正在试用 Azure 移动应用和最近发布的 SDK https://azure.microsoft.com/en-us/blog/azure-mobile-apps-november-2015-update/

我创建了该服务，并且入门Todo应用程序工作正常。然后我添加了脸书身份验证，这也有效。我还想从服务中获取一些额外的FB信息，因此基于github上的解决方案和示例应用程序，我添加了一个新的api

https://github.com/Azure/azure-mobile-apps-net-server/blob/2d2901ed5207f0ba6698660eb4ee568a63f18581/samples/SampleApp/Controllers/SecuredController.cs

服务器端代码

html" target="_blank">public class AuthenticationController : ApiController
{
    [Authorize]
    public async Task<JObject> GetIdentity()
    {
        FacebookCredentials fb = await this.User.GetAppServiceIdentityAsync<FacebookCredentials>(this.Request);
        var result = new JObject();
        if (fb != null)
        {
            var accessToken = fb.AccessToken;
            result.Add("facebook", await GetProviderInfo("https://graph.facebook.com/me?access_token=" + accessToken));
        }

        return result;
    }

    private async Task<JToken> GetProviderInfo(string url)
    {
        var c = new HttpClient();
        var resp = await c.GetAsync(url);
        resp.EnsureSuccessStatusCode();
        return JToken.Parse(await resp.Content.ReadAsStringAsync());
    }

}

Android项目中的客户端代码

var user = await TodoItemManager.Instance.ClientInstance.LoginAsync(Forms.Context, MobileServiceAuthenticationProvider.Facebook);
var info = await TodoItemManager.Instance.ClientInstance.InvokeApiAsync("GetIdentity", null, HttpMethod.Get, null);

LoginAsync成功，我获得了用户ID和令牌，但InvokeApAsync失败，出现以下异常

Microsoft.WindowsAzure.MobileServices.MobileServiceInvalidOperationException: The resource you are looking for has been removed, had its name changed, or is temporarily unavailable.
  at Microsoft.WindowsAzure.MobileServices.MobileServiceHttpClient+<ThrowInvalidResponse>d__18.MoveNext () [0x0022f] in <filename unknown>:0 
--- End of stack trace from previous location where exception was thrown ---
11-26 19:09:10.897 I/mono-stdout( 3514):   at Microsoft.WindowsAzure.MobileServices.MobileServiceHttpClient+<ThrowInvalidResponse>d__18.MoveNext () [0x0022f] in <filename unknown>:0 
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/2098/3efa14c4/source/mono/external/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143 
  at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/2098/3efa14c4/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:201 
11-26 19:09:10.898 I/mono-stdout( 3514): --- End of stack trace from previous location where exception was thrown ---
11-26 19:09:10.898 I/mono-stdout( 3514):   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/2098/3efa14c4/source/mono/external/referencesource/mscorlib/system/runtime/exceptionservices/exceptionservicescommon.cs:143 
  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/2098/3efa14c4/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:170 
11-26 19:09:10.899 I/mono-stdout( 3514):   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00047] in /Users/builder/data/lanes/2098/3efa14c4/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:201 
11-26 19:09:10.900 I/mono-stdout( 3514):   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/2098/3efa14c4/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:170 
  at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/2098/3efa14c4/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:142 
  at System.Runtime.CompilerServices.TaskAwaiter.GetResult () [0x00000] in /Users/builder/data/lanes/2098/3efa14c4/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:124 
  at Microsoft.WindowsAzure.MobileServices.MobileServiceHttpClient+<SendRequestAsync>d__1d.MoveNext () [0x0010d] in <filename unknown>:0 

我错过了什么或做错了什么？提前谢谢。。

Answer 1

在我的项目中，使用新的Azure App Service示例项目时，我也出现了类似的错误。我只是尝试使用我自己的模型类从Azure db中检索数据，而不是像你一样进行身份验证。

错误如下：

Microsoft.WindowsAzure.MobileServices.MobileServiceInvalidOperationException：您要查找的资源已被删除、名称已更改或暂时不可用。

事实证明，在我的移动服务器项目中，我有一个定义为CorporateEvent的模型，而在我的客户端项目中，有一个相同的定义为corporationeEventModel的模型。一旦我将客户端项目中的模型重命名为CorporateEvent，错误就消失了，我可以访问数据库。

希望这有帮助。