How to use Microsoft Azure Storage Emulator with Xamarin? - azure

Question

How to use Microsoft Azure Storage Emulator with Xamarin.Android?
I have downloaded Microsoft Azure Storage Emulator and Microsoft Azure Storage Explorer. I tried to follow tutorials at Microsoft websites but still i have problems with authentication. When I was using real during free trial subscription everything worked.
I know that I have to use SAS keys. But when I create table storage in storage explorer and then generate there SAS it's still wrong. Maybe someone already did that and can paste his code or steps to reproduce connection with storage emulator.
const string connectionString = "SharedAccessSignature=sv=2015-04-05&sr=c&sig=91HcGtCMxWM6%2B13mRDH1kej5Wq1a8gRk4WCFd6CeLuk%3D&se=2016-08-01T12%3A16%3A55Z&sp=rwdl;TableEndpoint=http://127.0.0.1:10002/devstoreaccount1";
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(connectionString);
CloudTableClient tableClient = storageAccount.CreateCloudTableClient();
CloudTable table = tableClient.GetTableReference("Test");
bool exists = await table.ExistsAsync();
if (exists)
System.Console.WriteLine("Exists");
else
System.Console.WriteLine("Doesnt exist");
Error Details:
<RequestResult>
<HTTPStatusCode>0</HTTPStatusCode>
<HttpStatusMessage />
<TargetLocation>Primary</TargetLocation>
<ServiceRequestID />
<ContentMd5 />
<Etag />
<RequestDate />
<StartTime>Sun, 31 Jul 2016 13:43:44 GMT</StartTime>
<EndTime>Sun, 31 Jul 2016 13:43:44 GMT</EndTime>
<Error></Error>
<ExceptionInfo>
<Type />
<HResult>-2146233088</HResult>
<Message>Error: ConnectFailure (Connection refused)</Message>
<Source />
<StackTrace />
<InnerExceptionInfo>
<ExceptionInfo>
<Type />
<HResult>-2146233079</HResult>
<Message>Error: ConnectFailure (Connection refused)</Message>
<Source>mscorlib</Source>
<StackTrace> at System.Net.HttpWebRequest.EndGetResponse (IAsyncResult asyncResult) [0x0005e] in /Users/builder/data/lanes/2923/52635947/source/mono/mcs/class/System/System.Net/HttpWebRequest.cs:1005
at System.Threading.Tasks.TaskFactory`1[TResult].FromAsyncCoreLogic (IAsyncResult iar, System.Func`2 endFunction, System.Action`1 endAction, System.Threading.Tasks.Task`1 promise, Boolean requiresSynchronization) [0x00014] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/threading/Tasks/FutureFactory.cs:550
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/2923/52635947/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/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128
at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[TResult].GetResult () [0x00000] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:535
at System.Net.Http.HttpClientHandler+<SendAsync>c__async0.MoveNext () [0x003d6] in /Users/builder/data/lanes/2923/52635947/source/mono/mcs/class/System.Net.Http/System.Net.Http/HttpClientHandler.cs:372
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/2923/52635947/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/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128
at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1+ConfiguredTaskAwaiter[TResult].GetResult () [0x00000] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:535
at System.Net.Http.HttpClient+<SendAsyncWorker>c__async0.MoveNext () [0x000a9] in /Users/builder/data/lanes/2923/52635947/source/mono/mcs/class/System.Net.Http/System.Net.Http/HttpClient.cs:276
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in /Users/builder/data/lanes/2923/52635947/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/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x0002e] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x0000b] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128
at System.Runtime.CompilerServices.TaskAwaiter`1[TResult].GetResult () [0x00000] in /Users/builder/data/lanes/2923/52635947/source/mono/external/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:357
at Microsoft.WindowsAzure.Storage.Core.Executor.Executor+<ExecuteAsyncInternal>d__6`1[T].MoveNext () [0x003cf] in c:\Program Files (x86)\Jenkins\workspace\release_dotnet_master\Lib\WindowsRuntime\Core\Executor\Executor.cs:128 </StackTrace>
<InnerExceptionInfo>
<ExceptionInfo>
<Type />
<HResult>-2147467259</HResult>
<Message>Connection refused</Message>
<Source>System</Source>
<StackTrace> at System.Net.Sockets.Socket.Connect (System.Net.EndPoint remoteEP) [0x000cb] in /Users/builder/data/lanes/2923/52635947/source/mono/mcs/class/System/System.Net.Sockets/Socket.cs:1313
at System.Net.WebConnection.Connect (System.Net.HttpWebRequest request) [0x0019b] in /Users/builder/data/lanes/2923/52635947/source/mono/mcs/class/System/System.Net/WebConnection.cs:195 </StackTrace>
</ExceptionInfo>
</InnerExceptionInfo>
</ExceptionInfo>
</InnerExceptionInfo>
</ExceptionInfo>
</RequestResult>
Thank you for your time.

Answer 1

I believe you're getting this error is because you're running this code in an Emulator. Since the IP address of your emulator is 127.0.0.1, the requests are not actually hitting the storage emulator but your device emulator only. That's why you're getting this connection refused error. Please see this thread for more details: https://forums.xamarin.com/discussion/1199/how-to-make-our-remote-host-127-0-0-1-reachable-from-android-device-monoandroid-using-vs2010.
What I would recommend is that you use an actual cloud storage account instead of storage emulator to test your code. When you do use the actual storage account, please use the code below (obviously change the connection string appropriately). It should work:
var connectionString = "http://127.0.0.1/devstoreaccount1/Testowa?st=2015-07-31T11%3A50%3A00Z&se=2017-0‌​8-01T11%3A50%3A00Z&sp=raud&sv=2015-04-05&tn=testowa&sig=UEbinBTgpEGwy1ts0hwmSfELM‌​1lYCBItLHgWpWSgvE4%3D";
CloudTable table = new CloudTable(new Uri(connectionString));
bool exists = await table.ExistsAsync();
if (exists)
System.Console.WriteLine("Exists");
else
System.Console.WriteLine("Doesnt exist");