DELETE requests fail on Mono env

I am using client v3.0.3.0 on Mac OS X with Mono. All DELETE requests (delete container, CloudBlockBlob.Delete, CloudPageBlob.Delete) are failing with HTTP 403 Forbidden:

Microsoft.WindowsAzure.Storage.StorageException: The remote server returned an error: (403) Server failed to authenticate the request. Make sure the value of Authorization header is formed correctly including the signature.. —> System.Exception: The remote server returned an error: (403) Server failed to authenticate the request. Make sure the value of Authorization header is formed correctly including the signature… at System.Net.HttpWebRequest.CheckFinalStatus (System.Net.WebAsyncResult result) [0x0030c] in /private/tmp/source/bockbuild-mono-3.2.6/profiles/mono-mac-xamarin/build-root/mono-3.2.6/mcs/class/System/System.Net/HttpWebRequest.cs:1606

Seems like a signing issue. Repro is rather easy:

var account = new CloudStorageAccount (new Microsoft.WindowsAzure.Storage.Auth.StorageCredentials (STORAGE_ACCT, STORAGE_KEY), true);
var client = account.CreateCloudBlobClient ();
var container = client.GetContainerReference (Guid.NewGuid().ToString());
container.Delete (); // throws exception

It was also the same on v3.0.2.x, I just upgraded today to see if it’s a known issue. Same version works fine on Windows. And please note, it’s just DELETE operations, all others work fine.

Here’s a dump of RequestEventArgs.Request.Header.ToString() caught in OperationContext.ResponseReceived event on both platforms,

OS X:

{User-Agent: WA-Storage/3.0.3 (.NET CLR 4.0.30319.17020; Unix 13.0.0.0)
x-ms-version: 2013-08-15
x-ms-client-request-id: b90b3f36-1f88-4150-a71c-20f1502a8e96
x-ms-date: Wed, 12 Feb 2014 06:27:20 GMT
Authorization: SharedKey f00f00f00:x+0U7Z9ggFl3MHuYfvrOR3wgieFLhQr/5j+sjaSxBnc=
Content-Length: 0
Connection: keep-alive
Host: f00f00f00.blob.core.windows.net

}

Windows:

{User-Agent: WA-Storage/3.0.3 (.NET CLR 4.0.30319.34003; Win32NT 6.2.9200.0)
x-ms-version: 2013-08-15
x-ms-client-request-id: e34b16cc-2921-4493-888c-307994d532d5
x-ms-date: Wed, 12 Feb 2014 06:29:47 GMT
Authorization: SharedKey f00f00f00:I9Gd72nFal6v8IPOYigOQsiJCYq90/VkDTLEsWGYWR8=
Host: f00f00f00.blob.core.windows.net
Connection: Keep-Alive

}

The only difference I see is Content-Length: 0 added on Windows probably while sending the request. I’ll try to see if it is missing while signing. I’ll be investigating a bit.

[akorchemniy]

I ran into the same error when attempting to run: table.CreateIfNotExists();

Turned out that my system time was off by a few hours.

[ahmetb]

Fixed in Mono per request. https://bugzilla.xamarin.com/show_bug.cgi?id=17736 hoping to get and try soon.